Solvent extraction,a separation and purification technology,is crucial in critical metal metallurgy.Organic solvents commonly used in solvent extraction exhibit disadvantages,such as high volatility,high toxicity,and ...Solvent extraction,a separation and purification technology,is crucial in critical metal metallurgy.Organic solvents commonly used in solvent extraction exhibit disadvantages,such as high volatility,high toxicity,and flammability,causing a spectrum of hazards to human health and environmental safety.Neoteric solvents have been recognized as potential alternatives to these harmful organic solvents.In the past two decades,several neoteric solvents have been proposed,including ionic liquids(ILs)and deep eutectic solvents(DESs).DESs have gradually become the focus of green solvents owing to several advantages,namely,low toxicity,degradability,and low cost.In this critical review,their classification,formation mechanisms,preparation methods,characterization technologies,and special physicochemical properties based on the most recent advancements in research have been systematically described.Subsequently,the major separation and purification applications of DESs in critical metal metallurgy were comprehensively summarized.Finally,future opportunities and challenges of DESs were explored in the current research area.In conclusion,this review provides valuable insights for improving our overall understanding of DESs,and it holds important potential for expanding separation and purification applications in critical metal metallurgy.展开更多
Nervonic acid(NA) is a long-chain monounsaturated fatty acid with significant potential for neural fiber repair.In this study,a mixed fatty acid methyl ester was synthesized as the raw material through saponification ...Nervonic acid(NA) is a long-chain monounsaturated fatty acid with significant potential for neural fiber repair.In this study,a mixed fatty acid methyl ester was synthesized as the raw material through saponification of Acer truncatum Bunge seed oil.Based on the differences in boiling points and relative volatilities of various components,a four-stage vacuum batch distillation process was employed to enrich the nervonic acid methyl ester(NAME).The effect of distillation process parameters on enrichment efficiency was investigated,including distillation temperature,operating pressure,and reflux ratio.The purity of NAME achieved as 91.20% under optimal conditions and the corresponding yield was 48.91%.To further increase the purity,a low-temperature crystallization process was adopted and a final purity of NAME was obtained as 97.56%.Simulation of the above four-stage batch distillation was conducted using Aspen Plus software,and a continuous distillation processes was further simulated to establish a theoretical basis for future industrial-scale production.The results of experiments and simulation demonstrate that the integrated process of vacuum distillation and low-temperature crystallization exhibits remarkable separation performances,providing robust guidance for the production of high-purity NA.展开更多
The presence of impurities in phosphogypsum has long impeded its effective utilization,highlighting the need for energy-efficient and sustainable purification methods.This study proposes a novel purification strategy ...The presence of impurities in phosphogypsum has long impeded its effective utilization,highlighting the need for energy-efficient and sustainable purification methods.This study proposes a novel purification strategy that synergistically combines pH regulation and micelle-assisted treatment to create an optimized microenvironment for impurity removal.Under mechanical grinding conditions,this approach enhances the rheological properties of the phosphogypsumslurries and facilitates the dissolution and removal of impurity ions.Experimental results demonstrate that the synergistic method achieves a remarkable 64.01%increase in whiteness while significantly reducing soluble phosphorus and fluoride content in a single-step process.This technique not only achieves high purification efficiency but also offers a practical pathway for the high-value utilization of phosphogypsum.These findings suggest that this method has substantial potential for enhancing sustainable resource management and enabling broader industrial applications of purified phosphogypsum.展开更多
Surface pretreatment can change the surface properties of minerals,placing them in either a favorable or an unfavorable state for flotation.To solve the separation problem associated with magnesite and dolomite,surfac...Surface pretreatment can change the surface properties of minerals,placing them in either a favorable or an unfavorable state for flotation.To solve the separation problem associated with magnesite and dolomite,surface pretreatment experiments with citric acid,tartaric acid,and tannic acid(TA)on magnesite and dolomite as well as flotation experiments on pretreated samples were performed in this study.Experimental results demonstrated that when citric acid and tartaric acid are used for surface pretreatment,the separation effect of magnesite and dolomite is poor.However,when TA is used,the separation effect of magnesite and dolomite improves.SEM and BET analysis indicated that surface pretreatment with TA changes the surface morphology of the two minerals,resulting in additional concave pores on the dolomite surface,and a significant increase in pore size and specific surface area.The adsorption quantity test and contact angle measurement demonstrated that after surface pretreatment with TA,the magnesite adsorption capacity on sodium oleate(NaOL)slightly decreases and the dolomite adsorption capacity on NaOL considerably decreases.XPS detection concluded that the surface pretreatment of TA on the magnesite surface mainly relies on physical adsorption with weak adsorption ability and poor ability to act on Mg sites.The TA surface pretreatment action on the dolomite surface is mainly through chemical adsorption,and it is strongly and selectively adsorbed on the Ca site of dolomite through O.Actual ore rough selection experiments reveal that TA pretreatment successfully removes dolomite from magnesite,resulting in a high-quality magnesite concentrate characterized by a MgO grade of 45.49%and a CaO grade of 0.75%.展开更多
A novel low molecular weight compound polysaccharide(LMW-CPS) was identified from a specific combination of Chinese herb ingredients.The monosaccharide composition of LMW-CPS was consisted of single arabinose,which ha...A novel low molecular weight compound polysaccharide(LMW-CPS) was identified from a specific combination of Chinese herb ingredients.The monosaccharide composition of LMW-CPS was consisted of single arabinose,which had an α-L-furanose configuration with an average molecular weight of 2.06 kDa.NMR spectra and monosaccharide constitution analyses revealed that it had a backbone of→5)-α-L-Araf-(1→with α-L-Araf(1→as the terminal residue.In vitro experiments found that it could lead to apoptosis and inhibit hepatocellular carcinoma cell proliferation by arresting them in the S phase.In vivo experiments showed that it protected immune organs such as the thymus and spleen,enhanced immune cell activities,stimulated cytokine release,augmented the abundance of CD8,CD3,CD4,and CD 19 positive lymphocytes,and markedly impeded solid hepatocellular carcinoma progression in mice.Hematoxylin and eosin staining and cell cycle examination also indicated that LMW-CPS arrested hepatocellular carcinoma cells at the S phase to induce apoptosis.These findings indicated its promising potential for the treatment of hepatocellular carcinoma.展开更多
The influence of refining flux composition,refining time,refining temperature,and addition amount on the microstructure and mechanical properties of Mg-9Li-3Al-1Zn alloy was investigated with orthogonal experimental d...The influence of refining flux composition,refining time,refining temperature,and addition amount on the microstructure and mechanical properties of Mg-9Li-3Al-1Zn alloy was investigated with orthogonal experimental design.The flux purification process for Mg-Li alloys was optimized and the most effective ternary flux composition was identified.Results indicate that flux purification significantly mitigates Li loss during smelting by forming a protective surface layer that reduces Li oxidation and evaporation.The optimal flux composition is LiCl:LiF:CaF_(2)in a 3:1:2 mass ratio,with a flux addition of 3%,refining temperature of 720°C,and holding time of 10 min.The elongation of alloy improves to 16.2% after refinement,while the enhancement in strength remains marginal.展开更多
At present,the most common preparation method of amorphous boron powder is magnesium thermal reduction method,but the amorphous boron powder obtained by this method mostly contains impurities such as magnesium and oxy...At present,the most common preparation method of amorphous boron powder is magnesium thermal reduction method,but the amorphous boron powder obtained by this method mostly contains impurities such as magnesium and oxygen which are difficult to remove,and these impurities will seriously affect the application of amorphous boron powder and need to be strictly removed.In this research,the acid-insoluble impurities were modified through sintering and quenching,while the magnesium impurities were optimized via ultrasonic acid leaching.We observed that the quenching temperature played a crucial role in determining the efficiency of magnesium impurity removal.The results show that the magnesium content in amorphous boron powder can be reduced from 5.67%to 2.40%by quenching the amorphous boron powder at 800°C and using ultrasonic assisted acid leaching.Furthermore,the oxidation reaction of boron is influenced by the powder's particle size and specific surface area,with the effective activation energy being intimately tied to both these factors.Post-quenching and acid leaching,we observed an increase in the specific surface area of the boron powder samples,leading to enhanced activity.In conclusion,our study presents an effective strategy to mitigate magnesium impurities and elevate the performance of amorphous boron powder,offering promising avenues for advancing its utilization across diverse industries.展开更多
Pure magnesia filter and periclase-spinel filter were prepared using porous MgO powder and Al2O3 micro-powder as raw materials.The filtration efficiency and purification mechanism of the two sets of filters on molten ...Pure magnesia filter and periclase-spinel filter were prepared using porous MgO powder and Al2O3 micro-powder as raw materials.The filtration efficiency and purification mechanism of the two sets of filters on molten steel were investigated through steel casting tests.The results show that on the basis of surviving the thermal shock of molten steel,both filters can significantly reduce the number of non-metallic inclusions and total oxygen content of steel,thereby improving the cleanliness of the molten steel.After the thermal shock of molten steel,cracks were found in the microstructure of pure magnesia filter.Via the diffusion of non-metallic inclusions from steel into MgO grains of the filter to form solid solution,the inclusions were adsorbed to the internal and external surfaces of the pure magnesia filter.The number of inclusions was reduced by 62.5%,and the total oxygen content decreased from 0.892 to 0.265 wt.%after filtration,achieving a filtration efficiency of 70.3%.Compared with the pure magnesia filter,no cracks were found in the microstructure of the periclase-spinel filter.The mass transfer rate was accelerated due to the diffusion of inclusions from steel into MgO and MgAl2O4 grains of the filter,as well as the higher high-temperature liquid content and smaller pore structure of the filter.More non-metallic inclusions were able to enter the interior of the filter,which made the periclase-spinel filter more capable of adsorbing inclusions from steel and reducing total oxygen content.The periclase-spinel filter reduced the number of inclusions in steel by 84.4%and decreased the total oxygen content of the steel from 0.892 to 0.119 wt.%,with a filtration efficiency of 86.7%,demonstrating excellent comprehensive performance.展开更多
The global scarcity of clean water is an escalating issue due to climate change,population growth,and pollution.Traditional water purification technologies,while effective,often require significant energy input and co...The global scarcity of clean water is an escalating issue due to climate change,population growth,and pollution.Traditional water purification technologies,while effective,often require significant energy input and complex infrastructure,limiting their accessibility.This review explores the use of conjugated polymer hydrogels as a promising solution for solar water purification.Conjugated polymer hydrogels offer unique advantages,including high photothermal conversion efficiency,effective heat management,and rapid water transport,which are crucial for efficient solar-driven water evaporation.By leveraging the properties of these hydrogels,it is possible to significantly reduce the energy required for water evaporation,making them a cost-effective and scalable option for producing potable water from seawater or wastewater.This review discusses the principles of solar water purification using conjugated polymer hydrogels,strategies to enhance their performance through material and structural design,and their applications in pollutant removal and desalination.Additionally,it addresses the advantages and limitations of these materials,providing insights into their potential future development and applications in sustainable water purification technologies.展开更多
Fe-doped CuCrO_(2) catalyst CuCr_(1-x)Fe_xO_(2) series were prepared by the sol-gel method with different Fe contents.The structure and properties of the catalysts were investigated by XRD(X-ray diffraction),SEM(scann...Fe-doped CuCrO_(2) catalyst CuCr_(1-x)Fe_xO_(2) series were prepared by the sol-gel method with different Fe contents.The structure and properties of the catalysts were investigated by XRD(X-ray diffraction),SEM(scanning electron microscope),and XPS(X-ray photoelectron spectroscopy)and the purification effect on NO_(x) and PM was measured through simulated emission experiments.The results indicate that CuCrO_(2) catalyst has good catalytic activity,the maximum NO_(x) conversion rate can be up to 28.15%,and the ignition temperature of PM can be reduced to 285℃.When the molecular ratio of Cr:Fe=9:1,the catalyst can achieve better catalytic effect,the maximum NO_(x) conversion rate will be up to 30.25%and the PM ignition temperature can be reduced to 280℃.In addition,the catalytic activity of catalyst supported on different carriers was also studied.The results show that catalyst on SiC foam ceramic carrier has better catalytic activity than that on cordierite honeycomb ceramic carrier.The maximum NO_(x) conversion of CuCrO_(2) and CuCr_(0.9)Fe_(0.1)O_(2) can be increased by 0.72%and 1.33%respectively,and the PM ignition temperature can be further reduced by 15 and 5℃respectively.展开更多
BACKGROUND We have innovatively amalgamated membrane blood purification and centrifugal blood cell separation technologies to address the limitations of current artificial liver support(ALS)models,and develop a versat...BACKGROUND We have innovatively amalgamated membrane blood purification and centrifugal blood cell separation technologies to address the limitations of current artificial liver support(ALS)models,and develop a versatile plasma purification system(VPPS)through centrifugal plasma separation.AIM To investigate the influence of VPPS on long-term rehospitalization and mortality rates among patients with acute-on-chronic liver failure(ACLF).METHODS This real-world,prospective study recruited inpatients diagnosed with ACLF from the Second Xiangya Hospital of Central South University between October 2021 and March 2024.Patients were categorized into the VPPS and non-VPPS groups based on the distinct ALS models administered to them.Self-administered questionnaires,clinical records,and self-reported data served as the primary methods for data collection.The laboratory results were evaluated at six distinct time points.All patients were subjected to follow-up assessments for>12 months.Kaplan-Meier survival analyses and Cox proportional hazards models were used to evaluate the risks of hospitalization and mortality during the follow-up period.RESULTS A cohort of 502 patients diagnosed with ACLF was recruited,with 260 assigned to the VPPS group.On comparing baseline characteristics,the VPPS group exhibited a significantly shorter length of stay,higher incidence of spontaneous peritonitis and pulmonary aspergillosis compared to the non-VPPS group(P<0.05).Agehazard ratio(HR=1.142,95%CI:1.01-1.23,P=0.018),peritonitis(HR=2.825,95%CI:1.07-6.382,P=0.026),albumin(HR=0.67,95%CI:0.46-0.942,P=0.023),total bilirubin(HR=1.26,95%CI:1.01-3.25,P=0.021),international normalized ratio(HR=1.97,95%CI:1.21-2.908,P=0.014),and VPPS/non-VPPS(HR=3.24,95%CI:2.152-4.76,P<0.001)were identified as significant independent predictors of mortality in both univariate and multivariate analyses throughout the follow-up period.Kaplan-Meier survival analyses demonstrated significantly higher rehospitalization and mortality rates in the non-VPPS group compared to the VPPS group during follow-up of≥2 years(log-rank test,P<0.001).CONCLUSION These findings suggest that VPPS is safe and has a positive influence on prognostic outcomes in patients with ACLF.展开更多
Flow anodic oxidation system has demonstrated to be a promising and environmental benign water treatment technology because of its advantages of high contaminant removal efficiency and low energy consumption.However,t...Flow anodic oxidation system has demonstrated to be a promising and environmental benign water treatment technology because of its advantages of high contaminant removal efficiency and low energy consumption.However,traditional setup needs an external unit for flow anode material separation and recovery,which inevitably increases the capital cost and hinders its continuous operation.Herein,a specific porous cathode is introduced to achieve continuous water purification with high contaminant removal in a flow anodic oxidation system.The efuent concentration of carbamazepine(CBZ),a common and model contaminant widely detected in natural water environment,was reduced by 99%.The linear sweep voltammetry(LSV)and quenching tests demonstrated that HO·was the dominant reactive species.While the removal of contaminants was inhibited in practical surface water,largely related to the quenching by dissolved organic matter and bicarbonate,the flow anodic oxidation process was competent in alleviating the ecotoxicity following oxidation.Our study constructs a modular device for cost-effective continuous water purification and provides insight into the mechanisms of flow andic oxidation.展开更多
Monolithic aerogels are promising candidates for use in atmospheric environmental purification due to their structural advantages,such as fine building block size together with high specific surface area,abundant pore...Monolithic aerogels are promising candidates for use in atmospheric environmental purification due to their structural advantages,such as fine building block size together with high specific surface area,abundant pore structure,etc.Additionally,monolithic aerogels possess a unique monolithic macrostructure that sets them apart from aerogel powders and nanoparticles in practical environmental clean-up applications.This review delves into the available synthesis strategies and atmospheric environmental applications of monolithic aerogels,covering types of monolithic aerogels including SiO_(2),graphene,metal oxides and their combinations,along with their preparation methods.In particular,recent developments for VOC adsorption,CO_(2)capture,catalytic oxidation of VOCs and catalytic reduction of CO_(2)are highlighted.Finally,challenges and future opportunities for monolithic aerogels in the atmospheric environmental purification field are proposed.This reviewprovides valuable insights for designing and utilizing monolithic aerogel-based functional materials.展开更多
Controlled synthesis of two-dimensional covalent organic frameworks(2D COFs),including stoichiometric and sub-stoichiometric variations,is a topic of growing interest due to its potential in gas separation application...Controlled synthesis of two-dimensional covalent organic frameworks(2D COFs),including stoichiometric and sub-stoichiometric variations,is a topic of growing interest due to its potential in gas separation applications.In this study,we successfully synthesized three distinct 2D COFs by carefully adjusting solvent compositions and monomer ratios during the synthesis of[4+4]type COFs.These included a stoichiometric[4+4]type COF and two sub-stoichiometric[4+2]type COFs,featuring unreacted amino or formyl groups.The resulting COFs exhibit different gas adsorption and separation properties.Specifically,sub-stoichiometric COF-DA with residual amino groups shows comparable adsorption capacity for C_(2)H_(2),C_(2)H_(4),and CO_(2)to stoichiometric COF-DAPy.In contrast,sub-stoichiometric COF-Py with residual formyl groups displays enhanced adsorption selectivity for C_(2)H_(2)/C_(2)H_(4)and C_(2)H_(2)/CO_(2)separation,with the C_(2)H_(2)/C_(2)H_(4)selectivity being the highest among reported COFs,attributed to increased pore polarity resulting from the presence of formyl groups.This study not only offers an additional example of substoichiometric COF synthesis but also advocates for further exploration of sub-stoichiometric COF materials,particularly in the field of gas adsorption and separation.展开更多
By adding zeolite aggregate with good adsorption properties,different mix ratios of added zeolite pervious concrete(ZPC)were designed to compare the water purification effect of ordinary pervious concrete and water pu...By adding zeolite aggregate with good adsorption properties,different mix ratios of added zeolite pervious concrete(ZPC)were designed to compare the water purification effect of ordinary pervious concrete and water purification tests that were conducted.The pore characteristics of the pervious concrete were identified using three-dimensional reconstruction software and the relationship between pore structure and water purification performance was quantified by gray entropy correlation analysis.The results showed that the purification efficiency of zeolite-doped pervious concrete was 17.6%-22.3%higher than that of ordinary pervious concrete.The characteristic parameters of the pore structure of permeable concrete,i.e.planar porosity and tortuosity,were determined using three-dimensional reconstruction software.The correlation between the degree of tortuosity and the removal rate reached more than 0.90,indicating that the internal pore structure of pervious concrete has a good correlation with the water purification performance.展开更多
Objective:To observe and explore the effectiveness and safety of continuous blood purification intervention in the clinical treatment of patients with severe sepsis in the Intensive Care Unit(ICU).Methods:Medical reco...Objective:To observe and explore the effectiveness and safety of continuous blood purification intervention in the clinical treatment of patients with severe sepsis in the Intensive Care Unit(ICU).Methods:Medical records were collected from March 2024 to March 2025,including a total of 54 patients with severe sepsis in the ICU.The patients were divided into two groups using a random number table method:the conventional group(27 patients receiving conventional treatment)and the observation group(27 patients receiving continuous blood purification in addition to conventional treatment).C-reactive protein,arterial lactate,mean arterial pressure,respiration,and heart rate were measured.The Sequential Organ Failure Assessment(SOFA)score was compared,and adverse reactions were observed.Results:The observation group had lower levels of C-reactive protein,arterial lactate,respiration,heart rate,and total SOFA score compared to the conventional group,while the mean arterial pressure was higher(P<0.05).The incidence of adverse reactions during treatment was lower in the observation group than in the conventional group(P<0.05).Conclusion:The use of continuous blood purification in the clinical treatment of patients with severe sepsis in the ICU is effective.It can alleviate the disease,improve vital signs,reduce inflammatory damage,and reduce adverse reactions.展开更多
Hybrid entangled states(HESs),which involve different particles with various degrees of freedom,have garnered significant attention and been applied in a wide range of quantum technologies.However,similar to other cat...Hybrid entangled states(HESs),which involve different particles with various degrees of freedom,have garnered significant attention and been applied in a wide range of quantum technologies.However,similar to other categories of entanglement,maximally HESs inevitably degrade to mixed states due to the environmental noise and operational imperfections.To address the degradation problem,measurement-based entanglement purification offers a feasible and robust solution alternative to conventional gate-based purification methods.In this paper,we propose a measurement-based hybrid entanglement purification protocol(MB-HEPP)for a certain kind of HES which consists of polarization photons and coherent states.We extend our methodology to several conditions,such as the multi-copy and multi-party scenarios,and the photon-loss condition.Compared with previous HEPPs,this protocol has several advantages.First,it does not depend on post-selection and the purified HESs can be retained for further application.Second,it does not require the Bell state measurement,but only uses the parity check with conventional linear optical elements,which makes it have the higher success probability and more feasible.Our MB-HEPP has potential applications in future heterogeneous quantum networks.展开更多
The direct one-step separation of polymer-grade C_(2)H_(4) from complex light hydrocarbon mixtures has high industrial significance but is very challenging.Herein,an ethylene-adsorption-weakening strategy is applied f...The direct one-step separation of polymer-grade C_(2)H_(4) from complex light hydrocarbon mixtures has high industrial significance but is very challenging.Herein,an ethylene-adsorption-weakening strategy is applied for precise regulation of the pore geometry of four tailor-made metal–organic frameworks(MOFs)with pillar-layered structures,dubbed TYUT-10/11/12/13.Based on its pore geometry design and functional group regulation,TYUT-12 exhibits exceptional selective adsorption selectivity toward C_(3)H_(8),C_(3)H_(6),C_(2)H_(6),C_(2)H_(2),and CO_(2) over C_(2)H_(4);its C_(2)H_(6)/C_(2)H_(4) adsorption selectivity reaches 4.56,surpassing the record value of 4.4 by Fe_(2)(O_(2))(dobdc)(dobdc^(4-)=2,5-dioxido-1,4-benzenedicarboxylate).The weak p–p stacking binding affinity toward C_(2)H_(4) in TYUT-12 is clearly demonstrated through a combination of neutron powder diffraction measurements and theoretical calculations.Breakthrough experiments demonstrate that C_(2)H_(4) can be directly obtained from binary,ternary,quaternary,and six-component light hydrocarbon mixtures with over 99.95%purity.展开更多
In the conventional melt preparation of magnesium rare-earth(Mg-RE)alloys,the repeated heating/cooling process involved in grain refinement and flux refining usually prolongs the preparation period and aggravates melt...In the conventional melt preparation of magnesium rare-earth(Mg-RE)alloys,the repeated heating/cooling process involved in grain refinement and flux refining usually prolongs the preparation period and aggravates melt oxidation.In this work,the purification and grain refinement of Mg-9Gd-3Y(GW93)alloy was simultaneously realized by one-step refining at 740℃ by using a self-developed compound flux.The results show that,only after holding for 10 min,the inclusion content of the alloy is reduced by 81%to 0.29%,while the grain size is reduced by 84%to 119μm.A physical model depicting the interactions between compound flux and alloy melt was proposed based on thermodynamic calculation and microstructure observation.The grain refinement mechanism has been analyzed by considering the presence of Zr particle(Zr_(p))and Zr solute(Zr_(s)).In addition,the generated RECl_(3) was found to be readily absorbed by the flux,decreasing the surface tension and promoting the purification efficacy of the flux,which plays an important role in the promoted elongation of the as-cast Mg-9Gd-3Y-0.5Zr(GW93K)alloy.This work presents a unique prospect in simplifying the melt preparation of Mg-RE alloy with a promoted quality.展开更多
Ammonia(NH_(3))emission has caused serious environment issues and aroused worldwide concern.The emerging ionic liquid(IL)provides a greener way to efficiently capture NH_(3).This paper provides rigorous process simula...Ammonia(NH_(3))emission has caused serious environment issues and aroused worldwide concern.The emerging ionic liquid(IL)provides a greener way to efficiently capture NH_(3).This paper provides rigorous process simulation,optimization and assessment for a novel NH_(3)deep purification process using IL.The process was designed and investigated by simulation and optimization using ionic liquid[C_(4)im][NTF_(2)]as absorbent.Three objective functions,total purification cost(TPC),total process CO_(2)emission(TPCOE)and thermal efficiency(ηeff)were employed to optimize the absorption process.Process simulation and optimization results indicate that at same purification standard and recovery rate,the novel process can achieve lower cost and CO_(2)emission compared to benchmark process.After process optimization,the optimal functions can achieve 0.02726$/Nm~3(TPC),311.27 kg CO_(2)/hr(TP-COE),and 52.21%(ηeff)for enhanced process.Moreover,compared with conventional process,novel process could decrease over$3 million of purification cost and 10000 tons of CO_(2)emission during the life cycle.The results provide a novel strategy and guidance for deep purification of NH_(3)capture.展开更多
基金financially supported by the Original Exploration Project of the National Natural Science Foundation of China(No.52150079)the National Natural Science Foundation of China(Nos.U22A20130,U2004215,and 51974280)+1 种基金the Natural Science Foundation of Henan Province of China(No.232300421196)the Project of Zhongyuan Critical Metals Laboratory of China(Nos.GJJSGFYQ202304,GJJSGFJQ202306,GJJSGFYQ202323,GJJSGFYQ202308,and GJJSGFYQ202307)。
文摘Solvent extraction,a separation and purification technology,is crucial in critical metal metallurgy.Organic solvents commonly used in solvent extraction exhibit disadvantages,such as high volatility,high toxicity,and flammability,causing a spectrum of hazards to human health and environmental safety.Neoteric solvents have been recognized as potential alternatives to these harmful organic solvents.In the past two decades,several neoteric solvents have been proposed,including ionic liquids(ILs)and deep eutectic solvents(DESs).DESs have gradually become the focus of green solvents owing to several advantages,namely,low toxicity,degradability,and low cost.In this critical review,their classification,formation mechanisms,preparation methods,characterization technologies,and special physicochemical properties based on the most recent advancements in research have been systematically described.Subsequently,the major separation and purification applications of DESs in critical metal metallurgy were comprehensively summarized.Finally,future opportunities and challenges of DESs were explored in the current research area.In conclusion,this review provides valuable insights for improving our overall understanding of DESs,and it holds important potential for expanding separation and purification applications in critical metal metallurgy.
基金supported by the National Natural Science Foundation of China(22125802,22108150,22338001)。
文摘Nervonic acid(NA) is a long-chain monounsaturated fatty acid with significant potential for neural fiber repair.In this study,a mixed fatty acid methyl ester was synthesized as the raw material through saponification of Acer truncatum Bunge seed oil.Based on the differences in boiling points and relative volatilities of various components,a four-stage vacuum batch distillation process was employed to enrich the nervonic acid methyl ester(NAME).The effect of distillation process parameters on enrichment efficiency was investigated,including distillation temperature,operating pressure,and reflux ratio.The purity of NAME achieved as 91.20% under optimal conditions and the corresponding yield was 48.91%.To further increase the purity,a low-temperature crystallization process was adopted and a final purity of NAME was obtained as 97.56%.Simulation of the above four-stage batch distillation was conducted using Aspen Plus software,and a continuous distillation processes was further simulated to establish a theoretical basis for future industrial-scale production.The results of experiments and simulation demonstrate that the integrated process of vacuum distillation and low-temperature crystallization exhibits remarkable separation performances,providing robust guidance for the production of high-purity NA.
基金financially supported by the Key Research and Development Program of Hubei Province(No.2022BCA082 and No.2022BEC013).
文摘The presence of impurities in phosphogypsum has long impeded its effective utilization,highlighting the need for energy-efficient and sustainable purification methods.This study proposes a novel purification strategy that synergistically combines pH regulation and micelle-assisted treatment to create an optimized microenvironment for impurity removal.Under mechanical grinding conditions,this approach enhances the rheological properties of the phosphogypsumslurries and facilitates the dissolution and removal of impurity ions.Experimental results demonstrate that the synergistic method achieves a remarkable 64.01%increase in whiteness while significantly reducing soluble phosphorus and fluoride content in a single-step process.This technique not only achieves high purification efficiency but also offers a practical pathway for the high-value utilization of phosphogypsum.These findings suggest that this method has substantial potential for enhancing sustainable resource management and enabling broader industrial applications of purified phosphogypsum.
基金Project(BGRIMM-KJSKL-2024-07) supported by the Open Foundation of State Key Laboratory of Mineral Processing,ChinaProjects(52374259,52174239) supported by the National Natural Science Foundation of China。
文摘Surface pretreatment can change the surface properties of minerals,placing them in either a favorable or an unfavorable state for flotation.To solve the separation problem associated with magnesite and dolomite,surface pretreatment experiments with citric acid,tartaric acid,and tannic acid(TA)on magnesite and dolomite as well as flotation experiments on pretreated samples were performed in this study.Experimental results demonstrated that when citric acid and tartaric acid are used for surface pretreatment,the separation effect of magnesite and dolomite is poor.However,when TA is used,the separation effect of magnesite and dolomite improves.SEM and BET analysis indicated that surface pretreatment with TA changes the surface morphology of the two minerals,resulting in additional concave pores on the dolomite surface,and a significant increase in pore size and specific surface area.The adsorption quantity test and contact angle measurement demonstrated that after surface pretreatment with TA,the magnesite adsorption capacity on sodium oleate(NaOL)slightly decreases and the dolomite adsorption capacity on NaOL considerably decreases.XPS detection concluded that the surface pretreatment of TA on the magnesite surface mainly relies on physical adsorption with weak adsorption ability and poor ability to act on Mg sites.The TA surface pretreatment action on the dolomite surface is mainly through chemical adsorption,and it is strongly and selectively adsorbed on the Ca site of dolomite through O.Actual ore rough selection experiments reveal that TA pretreatment successfully removes dolomite from magnesite,resulting in a high-quality magnesite concentrate characterized by a MgO grade of 45.49%and a CaO grade of 0.75%.
基金supported by the National Key Research and Development Program of China (2022YFF1100904)the Tianjin Key R&D Program (21YFSNSN00110)+2 种基金the Science and Technology Planning Project of State Administration for Market Regulation (2019MK005, 2020MK010, 2022MK012)Tianjin Administration for Market Regulation (2019-W20)State Criteria for Food Safety (spaq-2020-08, spaq-2020-31, spaq-2021-07, spaq-2022-05)。
文摘A novel low molecular weight compound polysaccharide(LMW-CPS) was identified from a specific combination of Chinese herb ingredients.The monosaccharide composition of LMW-CPS was consisted of single arabinose,which had an α-L-furanose configuration with an average molecular weight of 2.06 kDa.NMR spectra and monosaccharide constitution analyses revealed that it had a backbone of→5)-α-L-Araf-(1→with α-L-Araf(1→as the terminal residue.In vitro experiments found that it could lead to apoptosis and inhibit hepatocellular carcinoma cell proliferation by arresting them in the S phase.In vivo experiments showed that it protected immune organs such as the thymus and spleen,enhanced immune cell activities,stimulated cytokine release,augmented the abundance of CD8,CD3,CD4,and CD 19 positive lymphocytes,and markedly impeded solid hepatocellular carcinoma progression in mice.Hematoxylin and eosin staining and cell cycle examination also indicated that LMW-CPS arrested hepatocellular carcinoma cells at the S phase to induce apoptosis.These findings indicated its promising potential for the treatment of hepatocellular carcinoma.
基金financially supported by the National Defense Basic Research Program,China(No.JCKY2023204A005)Foundation Strengthening Plan Technical Field Fund,China(No.2021-JJ-0112)+1 种基金Major Scientific and Technological Innovation Project of Luoyang,China(No.2201029A)the National Natural Science Foundation of China(No.U2037601).
文摘The influence of refining flux composition,refining time,refining temperature,and addition amount on the microstructure and mechanical properties of Mg-9Li-3Al-1Zn alloy was investigated with orthogonal experimental design.The flux purification process for Mg-Li alloys was optimized and the most effective ternary flux composition was identified.Results indicate that flux purification significantly mitigates Li loss during smelting by forming a protective surface layer that reduces Li oxidation and evaporation.The optimal flux composition is LiCl:LiF:CaF_(2)in a 3:1:2 mass ratio,with a flux addition of 3%,refining temperature of 720°C,and holding time of 10 min.The elongation of alloy improves to 16.2% after refinement,while the enhancement in strength remains marginal.
基金support on this research from the Talent Training Program of Yunnan of China(Grant Nos.202005AC160041 and KKXY202252002)the"Xingdian Talent"Industry Innovation Talent Program in Yunnan Province(Grant No.XDYC-CYCX-2022-0042)。
文摘At present,the most common preparation method of amorphous boron powder is magnesium thermal reduction method,but the amorphous boron powder obtained by this method mostly contains impurities such as magnesium and oxygen which are difficult to remove,and these impurities will seriously affect the application of amorphous boron powder and need to be strictly removed.In this research,the acid-insoluble impurities were modified through sintering and quenching,while the magnesium impurities were optimized via ultrasonic acid leaching.We observed that the quenching temperature played a crucial role in determining the efficiency of magnesium impurity removal.The results show that the magnesium content in amorphous boron powder can be reduced from 5.67%to 2.40%by quenching the amorphous boron powder at 800°C and using ultrasonic assisted acid leaching.Furthermore,the oxidation reaction of boron is influenced by the powder's particle size and specific surface area,with the effective activation energy being intimately tied to both these factors.Post-quenching and acid leaching,we observed an increase in the specific surface area of the boron powder samples,leading to enhanced activity.In conclusion,our study presents an effective strategy to mitigate magnesium impurities and elevate the performance of amorphous boron powder,offering promising avenues for advancing its utilization across diverse industries.
基金supported by the Key Project of the National Natural Science Foundation of China(Grant No.U21A2058 and U1860205)the Natural Science Funds of Hubei Province for Distinguished Young Scholars(Grant No.2020CFA088).
文摘Pure magnesia filter and periclase-spinel filter were prepared using porous MgO powder and Al2O3 micro-powder as raw materials.The filtration efficiency and purification mechanism of the two sets of filters on molten steel were investigated through steel casting tests.The results show that on the basis of surviving the thermal shock of molten steel,both filters can significantly reduce the number of non-metallic inclusions and total oxygen content of steel,thereby improving the cleanliness of the molten steel.After the thermal shock of molten steel,cracks were found in the microstructure of pure magnesia filter.Via the diffusion of non-metallic inclusions from steel into MgO grains of the filter to form solid solution,the inclusions were adsorbed to the internal and external surfaces of the pure magnesia filter.The number of inclusions was reduced by 62.5%,and the total oxygen content decreased from 0.892 to 0.265 wt.%after filtration,achieving a filtration efficiency of 70.3%.Compared with the pure magnesia filter,no cracks were found in the microstructure of the periclase-spinel filter.The mass transfer rate was accelerated due to the diffusion of inclusions from steel into MgO and MgAl2O4 grains of the filter,as well as the higher high-temperature liquid content and smaller pore structure of the filter.More non-metallic inclusions were able to enter the interior of the filter,which made the periclase-spinel filter more capable of adsorbing inclusions from steel and reducing total oxygen content.The periclase-spinel filter reduced the number of inclusions in steel by 84.4%and decreased the total oxygen content of the steel from 0.892 to 0.119 wt.%,with a filtration efficiency of 86.7%,demonstrating excellent comprehensive performance.
基金funded by the National Natural Science Foundation of China,grant numbers 52373184&52473179the Key Research and Development Program of Jiangxi Province,grant number 20223BBE51023+1 种基金the Natural Science Foundation of Jiangxi Province,grant numbers 20232ACB204002&20232BAB202044the Jiangxi Provincial Key Laboratory of Flexible Electronics,grant numbers 20212BCD42004&20242BCC32010.
文摘The global scarcity of clean water is an escalating issue due to climate change,population growth,and pollution.Traditional water purification technologies,while effective,often require significant energy input and complex infrastructure,limiting their accessibility.This review explores the use of conjugated polymer hydrogels as a promising solution for solar water purification.Conjugated polymer hydrogels offer unique advantages,including high photothermal conversion efficiency,effective heat management,and rapid water transport,which are crucial for efficient solar-driven water evaporation.By leveraging the properties of these hydrogels,it is possible to significantly reduce the energy required for water evaporation,making them a cost-effective and scalable option for producing potable water from seawater or wastewater.This review discusses the principles of solar water purification using conjugated polymer hydrogels,strategies to enhance their performance through material and structural design,and their applications in pollutant removal and desalination.Additionally,it addresses the advantages and limitations of these materials,providing insights into their potential future development and applications in sustainable water purification technologies.
基金Funded by National Natural Science Foundation of China(No.52494933)。
文摘Fe-doped CuCrO_(2) catalyst CuCr_(1-x)Fe_xO_(2) series were prepared by the sol-gel method with different Fe contents.The structure and properties of the catalysts were investigated by XRD(X-ray diffraction),SEM(scanning electron microscope),and XPS(X-ray photoelectron spectroscopy)and the purification effect on NO_(x) and PM was measured through simulated emission experiments.The results indicate that CuCrO_(2) catalyst has good catalytic activity,the maximum NO_(x) conversion rate can be up to 28.15%,and the ignition temperature of PM can be reduced to 285℃.When the molecular ratio of Cr:Fe=9:1,the catalyst can achieve better catalytic effect,the maximum NO_(x) conversion rate will be up to 30.25%and the PM ignition temperature can be reduced to 280℃.In addition,the catalytic activity of catalyst supported on different carriers was also studied.The results show that catalyst on SiC foam ceramic carrier has better catalytic activity than that on cordierite honeycomb ceramic carrier.The maximum NO_(x) conversion of CuCrO_(2) and CuCr_(0.9)Fe_(0.1)O_(2) can be increased by 0.72%and 1.33%respectively,and the PM ignition temperature can be further reduced by 15 and 5℃respectively.
基金Supported by Natural Science Foundation of Hunan Province,China,No.2022JJ30842 and No.2024JJ6560Clinical Medical Research Center for Viral Hepatitis of Hunan Province,No.2023SK4009Beijing iGandan Foundation,No.RGGJJ-2021-017 and No.iGandanF-1082022-RGG023.
文摘BACKGROUND We have innovatively amalgamated membrane blood purification and centrifugal blood cell separation technologies to address the limitations of current artificial liver support(ALS)models,and develop a versatile plasma purification system(VPPS)through centrifugal plasma separation.AIM To investigate the influence of VPPS on long-term rehospitalization and mortality rates among patients with acute-on-chronic liver failure(ACLF).METHODS This real-world,prospective study recruited inpatients diagnosed with ACLF from the Second Xiangya Hospital of Central South University between October 2021 and March 2024.Patients were categorized into the VPPS and non-VPPS groups based on the distinct ALS models administered to them.Self-administered questionnaires,clinical records,and self-reported data served as the primary methods for data collection.The laboratory results were evaluated at six distinct time points.All patients were subjected to follow-up assessments for>12 months.Kaplan-Meier survival analyses and Cox proportional hazards models were used to evaluate the risks of hospitalization and mortality during the follow-up period.RESULTS A cohort of 502 patients diagnosed with ACLF was recruited,with 260 assigned to the VPPS group.On comparing baseline characteristics,the VPPS group exhibited a significantly shorter length of stay,higher incidence of spontaneous peritonitis and pulmonary aspergillosis compared to the non-VPPS group(P<0.05).Agehazard ratio(HR=1.142,95%CI:1.01-1.23,P=0.018),peritonitis(HR=2.825,95%CI:1.07-6.382,P=0.026),albumin(HR=0.67,95%CI:0.46-0.942,P=0.023),total bilirubin(HR=1.26,95%CI:1.01-3.25,P=0.021),international normalized ratio(HR=1.97,95%CI:1.21-2.908,P=0.014),and VPPS/non-VPPS(HR=3.24,95%CI:2.152-4.76,P<0.001)were identified as significant independent predictors of mortality in both univariate and multivariate analyses throughout the follow-up period.Kaplan-Meier survival analyses demonstrated significantly higher rehospitalization and mortality rates in the non-VPPS group compared to the VPPS group during follow-up of≥2 years(log-rank test,P<0.001).CONCLUSION These findings suggest that VPPS is safe and has a positive influence on prognostic outcomes in patients with ACLF.
基金financially supported by the Basic Science Center Project of the National Natural Science Foundation of China(No.52388101)Program for Guangdong Introducing Innovative and Entrepreneurial Teams(No.2019ZT08L213)the National Natural Science Foundation of China(No.52100030)。
文摘Flow anodic oxidation system has demonstrated to be a promising and environmental benign water treatment technology because of its advantages of high contaminant removal efficiency and low energy consumption.However,traditional setup needs an external unit for flow anode material separation and recovery,which inevitably increases the capital cost and hinders its continuous operation.Herein,a specific porous cathode is introduced to achieve continuous water purification with high contaminant removal in a flow anodic oxidation system.The efuent concentration of carbamazepine(CBZ),a common and model contaminant widely detected in natural water environment,was reduced by 99%.The linear sweep voltammetry(LSV)and quenching tests demonstrated that HO·was the dominant reactive species.While the removal of contaminants was inhibited in practical surface water,largely related to the quenching by dissolved organic matter and bicarbonate,the flow anodic oxidation process was competent in alleviating the ecotoxicity following oxidation.Our study constructs a modular device for cost-effective continuous water purification and provides insight into the mechanisms of flow andic oxidation.
基金supported by the National Key R&D Program of China(No.2022YFC3702800).
文摘Monolithic aerogels are promising candidates for use in atmospheric environmental purification due to their structural advantages,such as fine building block size together with high specific surface area,abundant pore structure,etc.Additionally,monolithic aerogels possess a unique monolithic macrostructure that sets them apart from aerogel powders and nanoparticles in practical environmental clean-up applications.This review delves into the available synthesis strategies and atmospheric environmental applications of monolithic aerogels,covering types of monolithic aerogels including SiO_(2),graphene,metal oxides and their combinations,along with their preparation methods.In particular,recent developments for VOC adsorption,CO_(2)capture,catalytic oxidation of VOCs and catalytic reduction of CO_(2)are highlighted.Finally,challenges and future opportunities for monolithic aerogels in the atmospheric environmental purification field are proposed.This reviewprovides valuable insights for designing and utilizing monolithic aerogel-based functional materials.
基金supported by the National Key Research and Development Project of China(No.2022YFE0113800)the National Natural Science Foundation of China(No.22375179)+1 种基金the startup grant(No.2019125016829)in Zhejiang University of Technologypartially supported by the National Innovation and Entrepreneurship Training Program(No.202310337063)。
文摘Controlled synthesis of two-dimensional covalent organic frameworks(2D COFs),including stoichiometric and sub-stoichiometric variations,is a topic of growing interest due to its potential in gas separation applications.In this study,we successfully synthesized three distinct 2D COFs by carefully adjusting solvent compositions and monomer ratios during the synthesis of[4+4]type COFs.These included a stoichiometric[4+4]type COF and two sub-stoichiometric[4+2]type COFs,featuring unreacted amino or formyl groups.The resulting COFs exhibit different gas adsorption and separation properties.Specifically,sub-stoichiometric COF-DA with residual amino groups shows comparable adsorption capacity for C_(2)H_(2),C_(2)H_(4),and CO_(2)to stoichiometric COF-DAPy.In contrast,sub-stoichiometric COF-Py with residual formyl groups displays enhanced adsorption selectivity for C_(2)H_(2)/C_(2)H_(4)and C_(2)H_(2)/CO_(2)separation,with the C_(2)H_(2)/C_(2)H_(4)selectivity being the highest among reported COFs,attributed to increased pore polarity resulting from the presence of formyl groups.This study not only offers an additional example of substoichiometric COF synthesis but also advocates for further exploration of sub-stoichiometric COF materials,particularly in the field of gas adsorption and separation.
基金Hunan Provincial Department of Water Resources:Research on Formula Optimization and Performance Evaluation System of Ecological Concrete for River Water Quality Purification Based on the Dual Carbon Goal(Project No.:XSKJ2024064-44)。
文摘By adding zeolite aggregate with good adsorption properties,different mix ratios of added zeolite pervious concrete(ZPC)were designed to compare the water purification effect of ordinary pervious concrete and water purification tests that were conducted.The pore characteristics of the pervious concrete were identified using three-dimensional reconstruction software and the relationship between pore structure and water purification performance was quantified by gray entropy correlation analysis.The results showed that the purification efficiency of zeolite-doped pervious concrete was 17.6%-22.3%higher than that of ordinary pervious concrete.The characteristic parameters of the pore structure of permeable concrete,i.e.planar porosity and tortuosity,were determined using three-dimensional reconstruction software.The correlation between the degree of tortuosity and the removal rate reached more than 0.90,indicating that the internal pore structure of pervious concrete has a good correlation with the water purification performance.
文摘Objective:To observe and explore the effectiveness and safety of continuous blood purification intervention in the clinical treatment of patients with severe sepsis in the Intensive Care Unit(ICU).Methods:Medical records were collected from March 2024 to March 2025,including a total of 54 patients with severe sepsis in the ICU.The patients were divided into two groups using a random number table method:the conventional group(27 patients receiving conventional treatment)and the observation group(27 patients receiving continuous blood purification in addition to conventional treatment).C-reactive protein,arterial lactate,mean arterial pressure,respiration,and heart rate were measured.The Sequential Organ Failure Assessment(SOFA)score was compared,and adverse reactions were observed.Results:The observation group had lower levels of C-reactive protein,arterial lactate,respiration,heart rate,and total SOFA score compared to the conventional group,while the mean arterial pressure was higher(P<0.05).The incidence of adverse reactions during treatment was lower in the observation group than in the conventional group(P<0.05).Conclusion:The use of continuous blood purification in the clinical treatment of patients with severe sepsis in the ICU is effective.It can alleviate the disease,improve vital signs,reduce inflammatory damage,and reduce adverse reactions.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.12175106 and 92365110)the Postgraduate Research and Practice Innovation Program of Jiangsu Province(Grant No.KYCX23-1028)。
文摘Hybrid entangled states(HESs),which involve different particles with various degrees of freedom,have garnered significant attention and been applied in a wide range of quantum technologies.However,similar to other categories of entanglement,maximally HESs inevitably degrade to mixed states due to the environmental noise and operational imperfections.To address the degradation problem,measurement-based entanglement purification offers a feasible and robust solution alternative to conventional gate-based purification methods.In this paper,we propose a measurement-based hybrid entanglement purification protocol(MB-HEPP)for a certain kind of HES which consists of polarization photons and coherent states.We extend our methodology to several conditions,such as the multi-copy and multi-party scenarios,and the photon-loss condition.Compared with previous HEPPs,this protocol has several advantages.First,it does not depend on post-selection and the purified HESs can be retained for further application.Second,it does not require the Bell state measurement,but only uses the parity check with conventional linear optical elements,which makes it have the higher success probability and more feasible.Our MB-HEPP has potential applications in future heterogeneous quantum networks.
基金supported by National Key Research and Development Program of China(2022YFB3806800)National Natural Science Foundation of China(22278288 and 22090062).
文摘The direct one-step separation of polymer-grade C_(2)H_(4) from complex light hydrocarbon mixtures has high industrial significance but is very challenging.Herein,an ethylene-adsorption-weakening strategy is applied for precise regulation of the pore geometry of four tailor-made metal–organic frameworks(MOFs)with pillar-layered structures,dubbed TYUT-10/11/12/13.Based on its pore geometry design and functional group regulation,TYUT-12 exhibits exceptional selective adsorption selectivity toward C_(3)H_(8),C_(3)H_(6),C_(2)H_(6),C_(2)H_(2),and CO_(2) over C_(2)H_(4);its C_(2)H_(6)/C_(2)H_(4) adsorption selectivity reaches 4.56,surpassing the record value of 4.4 by Fe_(2)(O_(2))(dobdc)(dobdc^(4-)=2,5-dioxido-1,4-benzenedicarboxylate).The weak p–p stacking binding affinity toward C_(2)H_(4) in TYUT-12 is clearly demonstrated through a combination of neutron powder diffraction measurements and theoretical calculations.Breakthrough experiments demonstrate that C_(2)H_(4) can be directly obtained from binary,ternary,quaternary,and six-component light hydrocarbon mixtures with over 99.95%purity.
基金supported by the National Natural Science Foundation of China(Nos.U2037601 and 51821001)the Research Program of Joint Research Center of Advanced Spaceflight Technologies(No.USCAST2020-31).
文摘In the conventional melt preparation of magnesium rare-earth(Mg-RE)alloys,the repeated heating/cooling process involved in grain refinement and flux refining usually prolongs the preparation period and aggravates melt oxidation.In this work,the purification and grain refinement of Mg-9Gd-3Y(GW93)alloy was simultaneously realized by one-step refining at 740℃ by using a self-developed compound flux.The results show that,only after holding for 10 min,the inclusion content of the alloy is reduced by 81%to 0.29%,while the grain size is reduced by 84%to 119μm.A physical model depicting the interactions between compound flux and alloy melt was proposed based on thermodynamic calculation and microstructure observation.The grain refinement mechanism has been analyzed by considering the presence of Zr particle(Zr_(p))and Zr solute(Zr_(s)).In addition,the generated RECl_(3) was found to be readily absorbed by the flux,decreasing the surface tension and promoting the purification efficacy of the flux,which plays an important role in the promoted elongation of the as-cast Mg-9Gd-3Y-0.5Zr(GW93K)alloy.This work presents a unique prospect in simplifying the melt preparation of Mg-RE alloy with a promoted quality.
基金supported by the National Natural Science Foundation of China (Nos.21890760 and 21838010)the Science Fund for Creative Research Groups of the National Natural Science Foundation of China (No.21921005)the International (Regional)Cooperation and Exchange of the National Natural Science Foundation of China (No.21961160744)。
文摘Ammonia(NH_(3))emission has caused serious environment issues and aroused worldwide concern.The emerging ionic liquid(IL)provides a greener way to efficiently capture NH_(3).This paper provides rigorous process simulation,optimization and assessment for a novel NH_(3)deep purification process using IL.The process was designed and investigated by simulation and optimization using ionic liquid[C_(4)im][NTF_(2)]as absorbent.Three objective functions,total purification cost(TPC),total process CO_(2)emission(TPCOE)and thermal efficiency(ηeff)were employed to optimize the absorption process.Process simulation and optimization results indicate that at same purification standard and recovery rate,the novel process can achieve lower cost and CO_(2)emission compared to benchmark process.After process optimization,the optimal functions can achieve 0.02726$/Nm~3(TPC),311.27 kg CO_(2)/hr(TP-COE),and 52.21%(ηeff)for enhanced process.Moreover,compared with conventional process,novel process could decrease over$3 million of purification cost and 10000 tons of CO_(2)emission during the life cycle.The results provide a novel strategy and guidance for deep purification of NH_(3)capture.
