September 22–25,2013,Dalian,China http://catbior2013.dicp.ac.cn Call For Papers 1.Congress Introduction The Organizing Committee cordially invites you to participate in the 2nd International Congress on Catalysis for...September 22–25,2013,Dalian,China http://catbior2013.dicp.ac.cn Call For Papers 1.Congress Introduction The Organizing Committee cordially invites you to participate in the 2nd International Congress on Catalysis for Biorefineries to be展开更多
September 22-25,2013,Dalian,China http://catbior2013.dicp.ac.cn Call For Papers 1.Congress Introduction The Organizing Committee cordially invites you to participate in the 2nd International Congress on Catalysis for ...September 22-25,2013,Dalian,China http://catbior2013.dicp.ac.cn Call For Papers 1.Congress Introduction The Organizing Committee cordially invites you to participate in the 2nd International Congress on Catalysis for Biorefineries to be held in Dalian from 22nd to 25th September,2013.The International Congress on Catalysis for展开更多
Small-scale biorefinery from sugarcane bagasse offers new possibilities to the sugar and ethanol industries.The aim of this study was to evaluate the feasibility of a small-scale biorefinery for the production of xyli...Small-scale biorefinery from sugarcane bagasse offers new possibilities to the sugar and ethanol industries.The aim of this study was to evaluate the feasibility of a small-scale biorefinery for the production of xylitol from sugarcane bagasse.The liquid fraction from the autohydrolysis treatment was selected as the source of sugars for xylitol and two scenarios were analyzed for the residual solid:ethanol or pellet production.A technical-economic analysis of alternatives was applied.The internal rate of return(IRR)was used to compare the selected proposals.The highest IRR values were obtained when processing 70,000 dry tons per year of bagasse.The results showed promising prospects for a small-scale biorefinery with capacities above 20,000 dry tons per year(xylitol and pellets),and above 50,000 dry tons per year(xylitol and ethanol).展开更多
Biorefinery production of fuels and chemicals represents an attractive route for solving current energy crisis,as well as reducing green-house gas(GHG)emissions from ships,planes,and long-haul trucks.The current biore...Biorefinery production of fuels and chemicals represents an attractive route for solving current energy crisis,as well as reducing green-house gas(GHG)emissions from ships,planes,and long-haul trucks.The current biorefinery industry is under transition from the use of food(1G,1st generation),to the use of biomass(2G,2nd generation).Moreover,the use of atmospheric CO_(2)(3G,3rd generation)has caught increased attention as the possible next-generation biorefinery.Here we discuss how microorganisms can be engineered for CO_(2)-based biorefineries to produce fuels and chemicals.We start through reviewing different metabolic pathways that can be recruited for CO_(2)fixation,followed by different opportunities for CO_(2)fixation,either through co-consumption with sugars or used as the sole carbon source.Key challenges and future research directions for advancing 3rd-generation biorefineries are also be discussed.展开更多
Lignocellulosic biomass is one of the viable solutions to alleviate the global warming. However, the limited utilization of biomass majorly focused on cellulose and hemicellulose restricts the economic and environment...Lignocellulosic biomass is one of the viable solutions to alleviate the global warming. However, the limited utilization of biomass majorly focused on cellulose and hemicellulose restricts the economic and environmental feasibilities. To cope with this issue, we proposed an integrated process of co-producing 1,6-hexanediol(1,6-HDO) with tetrahydrofuran and adipic acid from biomass, referred to as Strategy A. To compare the impacts of lignin upgrading and feedstock, Strategy B, which co-produces tetrahydrofuran alone, and Strategy C, which is the traditional route to produce 1,6-HDO from fossil fuels, were used. Heat networks are also designed to reduce operating costs and indirect carbon emissions due to energy consumption, saving 87% and 83% of the heat and cooling requirements, respectively, in Strategy A. The market competitiveness of Strategy A was evaluated by determining the minimum selling price through techno-economic analysis, and sustainability was thoroughly investigated by quantifying the environmental impacts through both midpoint and endpoint life-cycle assessments(LCAs).Strategy A was found to be the most favorable both economically(USRDSCHARDOLLAR3,402/ton) and environmentally(-26.9 kg CO_(2)eq.). This indicates that lignin valorization is not only economically but also environmentally preferred. Finally, changes in economic and environmental feasibilities depending on economic, process, and environmental parameters were investigated using sensitivity and uncertainty analyses. The results of these analyses provide valuable insight into bio-based chemical production.展开更多
The growing population and industrialization have led to significant production in agro-industrial sectors,result-ing in large amounts of agro-industrial residues often left untreated,posing potential environmental is...The growing population and industrialization have led to significant production in agro-industrial sectors,result-ing in large amounts of agro-industrial residues often left untreated,posing potential environmental issues.There-fore,finding effective ways to utilize these bio-based residues is crucial.One promising approach is to use these low-or no-value agro-industrial wastes as raw materials for producing renewable biomaterials,including proteins and peptides.Research has extensively explored peptide extraction using plant and animal-based agro-industrial residue.Due to lower processing costs and beneficial bioactive properties,peptides derived from waste could replace synthetic peptides and those extracted from food sources.The isolation,purification,and analysis processes of these peptides are thoroughly examined to optimize their extraction and ensure their purity and efficacy.These peptides’bioactive properties and mechanisms are being analyzed for their potential applications in the biomedical field.Additionally,the applications of bioactive peptides in medical fields,such as drug delivery systems,tissue engineering,and bioprinting,are discussed.展开更多
In the last decade,shell biorefinery,a novel concept referring to the extraction of the main components of crustacean shells and the transformation of each component into valuable products,was proposed and has attract...In the last decade,shell biorefinery,a novel concept referring to the extraction of the main components of crustacean shells and the transformation of each component into valuable products,was proposed and has attracted increasing attentions.Chitin is one of main components of crustacean shells.Owing to the bio-fixed nitrogen element,chitin biomass has been regarded as a good candidate to produce nitrogen-containing chemicals.Among these,3-acetamido-5-acetylfuran(3A5AF)is an interesting furanic compound derived from the hydrolysis and sequential dehydration of chitin.Similar to cellulose-derived platform chemical 5-hydromethylfurfural(HMF),3A5AF is an emerging platform compound and also can be converted into various useful chemicals by oxidation,reduction,hydrolysis,substitution,and so on.This review showcases the recent advances in the synthesis of 3A5AF from chitin and N-acetyl glucosamine(NAG)employing various catalytic systems.The conversion of 3A5AF into valuable compounds was introduced then.There are still some challenges in this area,for example,the rational design of green and efficient catalytic systems for the synthesis of 3A5AF and its derivatives.The outlooks also were discussed at the end of the review.展开更多
Oat husks,a byproduct of oat milling operations with limited economic value,present a promising feedstock for biorefinery processes due to their chemical composition.This study investigates the conversion of C5 carboh...Oat husks,a byproduct of oat milling operations with limited economic value,present a promising feedstock for biorefinery processes due to their chemical composition.This study investigates the conversion of C5 carbohydrates in oat husks into furfural through hydrothermal pretreatment using various phosphate-based catalysts,including H_(3)PO_(4),NH_(4)H_(2)PO_(4),NaH_(2)PO_(4),KH_(2)PO_(4),K_(2)HPO_(4) and K_(3)PO_(4) as catalyst.The catalysts’effectiveness in promoting furfural production was evaluated under identical hydrothermal conditions(treatment time for 60 min at a constant temperature of 170℃ and a catalyst amount).Continuous water steam was used to strip furfural from the reaction zone and minimize its degradation.Results indicated that H_(3)PO_(4) was the most effective catalyst,achieving a furfural yield of 13.99 wt.%,which corresponds to approximately 57%of the theoretical yield.NH4H2PO4 also showed moderate effectiveness,while sodium and potassium phosphate salts were significantly less effective.A scanning electron microscope analysis shows that catalysts with lower pH may disrupt the oat husks external layer thus providing a higher C5 carbohydrates conversion rate into furfural.The chemical complexity of oat husk contributes to side reactions between its carbohydrates and lignin during the hydrothermal treatment.This results in an increase in acid-insoluble lignin and inorganic matter in the oat husk lignocellulosic residue,which can reduce the effectiveness of further cellulose saccharification by enzymatic hydrolysis.展开更多
The significant amount of ash content in agricultural biomass presents an enormous challenge for efficient conversion processes.In addressing this issue,various deashing treatments have been tested and established,inc...The significant amount of ash content in agricultural biomass presents an enormous challenge for efficient conversion processes.In addressing this issue,various deashing treatments have been tested and established,including simple leaching techniques,which can either be performed with or without the addition of chemical agents.These techniques hold promise for improving the deashing efficiency while potentially altering the structural and chemical composition of biomass,specifically lignin content,which is the key focus of this review.This review starts by exploring the presence of ash in agricultural residues and its impact on biomass properties.Next,this review examines deashing strategies aimed at reducing ash levels in biomass followed by analysis of the resulting changes in lignin physical and chemical properties as well as its thermal characteristics.The final part of this review is concluded by the discussion on the limitations of current approaches and the possible future directions to address the challenges covering the environmental impacts of the deashing treatments.A green process approach is emphasized as a sustainable solution with the aim to minimize negative environmental impacts associated with chemical usage during deashing.Finally,this review highlights the potential for ash recovery as a byproduct of the deashing processes,paving the way for an integrative,closed-loop approach within the biorefinery concept.展开更多
Lignin is the only largest renewable aromatic resource in nature.Currently,most lignin is underutilized for low-value applications due to the complex structure and recalcitrant chemical properties.Over the past decade...Lignin is the only largest renewable aromatic resource in nature.Currently,most lignin is underutilized for low-value applications due to the complex structure and recalcitrant chemical properties.Over the past decades,extensive research has been devoted to valorizing lignin into aromatic N-heterocycles in the presence of nitrogen sources.It overcomes the element limitation,expands the products portfolio and would play a momentous role in value-added biorefinery concept.In this review,the latest research progress in the synthesis of N-heterocyclic compounds from lignin,lignin model compounds,and lignin-derived monomers(phenols,aromatic alcohols,aldehydes,ketones,and ethers)is presented.According to the structural characteristics of the products,these achievements are classified by the construction of five-,six-,and seven-membered N-heterocyclic compounds through one-step,multi-step,or one-pot multi-step reactions.Furthermore,the tailor-designed routes and catalytic systems,along with the reaction mechanisms/pathways involved are entirely discussed to elucidate the challenges regarding the structural complexity of lignin,the incompatible catalysis for C–O cleavage and C–N formation,as well as the nitrogen-heterocyclic ring construction.The prospects,future research efforts and process developments for the refining of lignin into aromatic N-heterocyclic compounds are outlined in terms of economy,environmental friendliness,and safety so as to draw some guidelines for lignin valorization.展开更多
Lignocellulosic biomass is the largest renewable hydrocarbon resource on earth.Converting cellulose,one of the major components of lignocellulose,powered by solar energy is a promising way of providing lowcarbon-footp...Lignocellulosic biomass is the largest renewable hydrocarbon resource on earth.Converting cellulose,one of the major components of lignocellulose,powered by solar energy is a promising way of providing lowcarbon-footprint energy chemicals such as H_(2),HCOOH,CO,and transportation fuels.State-of-the-art biorefineries target the full use of biomass feedstocks as they have a maximum collection radius of 75-100 km,requesting efficient and selective photocatalysts that significantly influence the outcome of photocatalytic biorefineries.Well-performed photocatalysts can harvest a broad solar spectrum and are active in breaking the chemical bonds of cellulose,decreasing the capital investments of biorefineries.Besides,photocatalysts should control the selectivity of cellulose conversion,originating target products to level down separation costs.Charge separation in photocatalysts and interfacial charge transfer between photocatalysts and cellulose affect the activity and selectivity of cellulose refineries to H2 and carbonaceous chemicals.To account for the challenges above,this review summarizes photocatalysts for the refineries of cellulose and downstream platform molecules based on the types of products,with the structure features of different types of photocatalysts discussed in relation to the targets of either improving the activity or product selectivity.In addition,this review also sheds light on the methods for designing and regulating photocatalyst structures to facilitate photocatalytic refineries of cellulose and platform molecules,meanwhile summarizing proposed future research challenges and opportunities for designing efficient photocatalysts.展开更多
The highly selective catalytic transfer hydrogenation(CTH)of furfural(FF)to furfuryl alcohol(FOL)is a significant route of biomass valorization.Herein,a series microporous Zr-metal organic framework(ZrMOF)functionaliz...The highly selective catalytic transfer hydrogenation(CTH)of furfural(FF)to furfuryl alcohol(FOL)is a significant route of biomass valorization.Herein,a series microporous Zr-metal organic framework(ZrMOF)functionalized by sulfonic groups are prepared.Based on the comprehensive structural characterizations by means of X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),N2 physisorption,Thermogravimetric(TG)and Fourier transformed infrared spectroscopy(FTIR),we find that sulfonic acid(–SO_(3)H)functional groups are tethered on the UIO-66 without affecting the structure of the framework.Systematic characterizations(NH_(3)-TPD,CO_(2)-TPD,and in-situ FTIR)demonstrate that modifying of sulfonic groups on UIO-66 results in the formation of stronger Lewis acidic-basic and Brnsted acidis sites.The cooperative role of the versatile Lewis acidic-basic and Brnsted acidic sites in 60%mol fraction of sulfonic acid-containing UIO-66(UIO-S_(0.6))retain high surface area and exhibit excellent catalytic performance of 94.7%FOL yield and 16.9 h^(-1).turnover number(TOF)under mild conditions.Kinetic experiments reveal that the activation energy of the CTH of furfural(FF)over UIO-S_(0.6) catalyst is as low as 50.8 k J mol^(-1).Besides,the hydrogen transfer mechanism is investigated through isotope labeling experiments,exhibiting that theβ-H in isopropanol is transferred to the a-C of FF by forming six-membered intermediates on the Lewis acidic-basic and Brnsted acidic sites of the UIO-S_(0.6),which is the rate-determining step in the formation of FOL.展开更多
Biomass refinery is considered to be a key technology in the 21 st century due to the importance of the sustainable production of various bioderived fuels and fine chemicals. Besides the synthesis of oxygen-containing...Biomass refinery is considered to be a key technology in the 21 st century due to the importance of the sustainable production of various bioderived fuels and fine chemicals. Besides the synthesis of oxygen-containing chemicals mainly from lignocellulosic biomass, nitrogencontaining chemicals belong to some of the most important commodity and fine chemicals. In this introductory short review, the main similarities and difficulties between petroleum oil-and biorefinery will be discussed and future challenges will be highlighted. As a particular example, recent developments in the shell biorefinery – the utilization of shell waste – will be reviewed. Particular emphasis will be placed on the structure of shell biomass, the current and emerging fractionation methods and the conversion of chitin and chitosan to various heteroatomcontaining chemicals. This review is meant to provide an introduction to beginners in the field of biorefinery as well as a comprehensive discussion of recent proceedings in the field of shell biorefinery. An outlook on the future potential and challenges will be given.展开更多
This study investigated the use of leftover biomass(rice husks)as the raw material for the biotechnological production of platform chemicals and biopolymers.Following the biorefinery concept,different acid hydrolysate...This study investigated the use of leftover biomass(rice husks)as the raw material for the biotechnological production of platform chemicals and biopolymers.Following the biorefinery concept,different acid hydrolysates were studied and resulted into a wide range of treatment strategies.Chemometrics were applied throughout the procedures in multivariate experimental conditions.By using the best hydrolytic conditions of 6.0%H3PO4,135oC(45 MPa)and reaction time of 62 min,21.0 g/L sugar hydrolysates were produced;by using the best hydrolytic condition of 4.5%HNO3,135oC/35 min,16.1 g/L sugar hydrolysates were produced;and with the hydrolysates use of 1.5%H2SO4 and 1.5%HCl,135oC/62 min,18.2 and 17.8 g/L sugar hydrolysates were produced,respectively.The highest productivity,in terms of fermentable sugars,reached 68%of integral cellulose/hemicellulose fraction and surpassed those found in the literature,with regard to the processing of rice husks,by considering just one step process.Sulfuric hydrolysate,detoxified with active carbon,was used to prove this proposal viability,resulting in a fermentation substrate for A.terreus(ATCC10020)and R.radiobacter(LMG196)strains(natural producers of bioproducts),which certified the feasibility of the proposal.The production of fermentable sugars from leftover biomass should encourage a search for new bioconversion routes,which can result in economic and environmental benefits and a spread of knowledge.展开更多
Converting carbohydrates into 5-hydroxymethylfurfural(5-HMF) is an attractive and promising route for value-added utilization of agricultural and forestry biomass resource. As an important platform compound, 5-HMF pos...Converting carbohydrates into 5-hydroxymethylfurfural(5-HMF) is an attractive and promising route for value-added utilization of agricultural and forestry biomass resource. As an important platform compound, 5-HMF possesses high active furan structure with hydroxymethyl and aldehyde group for production of various bio-chemicals and materials, meanwhile, which suffer from low stability and poor yield during the industrial biorefinery process. Hence, selective production of 5-HMF with high-yield and low-cost has attracted extensive attention from scientific and industrial researchers. This review sorted and described the latest advanced research on solvent and catalyst system, as well as energy field effect for production of 5-HMF with different feedstock in detail, emphatically discussing the solvent effect and its synergistic effect with other aspects. Besides, the future prospects and challenges for production of 5-HMF from carbohydrates were also presented, which provide a profound insight into industrial 5-HMF process with economic and environmental feature.展开更多
Machine learning(ML)has emerged as a significant tool in the field of biorefinery,offering the capability to analyze and predict complex processes with efficiency.This article reviews the current state of biorefinery ...Machine learning(ML)has emerged as a significant tool in the field of biorefinery,offering the capability to analyze and predict complex processes with efficiency.This article reviews the current state of biorefinery and its classification,highlighting various commercially successful biorefineries.Further,we delve into different categories of ML models,including their algorithms and applications in various stages of biorefinery lifecycle,such as biomass characterization,pretreatment,lignin valorization,chemical,thermochemical and biochemical conversion processes,supply chain analysis,and life cycle assessment.The benefits and limitations of each of these algorithms are discussed in detail.Finally,the article concludes with a discussion of the limitations and future prospects of ML in the field of biorefineries.展开更多
With the continued depletion of non-renewable energy resources,it is essential to seek new methods of harnessing clean and renewable energy.In this regard,second-generation bioethanol derived from lignocellulosic biom...With the continued depletion of non-renewable energy resources,it is essential to seek new methods of harnessing clean and renewable energy.In this regard,second-generation bioethanol derived from lignocellulosic biomass has attracted increasing attention in recent years.The choice of the pretreatment method of lignocellulose is critical to the subsequent bioconversion processes.Compared with other conventional chemical pretreatment methods,hydrothermal pretreatment is a simple,low-cost,and economically feasible process that requires water as the only reagent.This paper reviews the research efforts that have been made toward hydrothermal pretreatment of lignocellulosic biomass and focuses on the transformations involving cellulose,hemicellulose,and lignin during this process.展开更多
Recalcitrance and the inherent heterogeneity of lignin structure are the major bottlenecks to impede the popularization of lignin-based chemicals production processes.Recent works suggested a promising pathway for lig...Recalcitrance and the inherent heterogeneity of lignin structure are the major bottlenecks to impede the popularization of lignin-based chemicals production processes.Recent works suggested a promising pathway for lignin depolymerization and lignin-derived bio-oil upgrading via an electrochemical biorefinery(a process in which lignin valorization is performed via electrochemical oxidation or reduction).This review presents the progress on chemicals synthesis and bio-oil upgrading from lignin by an electrochemical biorefinery,relating to the lignin biosynthesis pathway,reaction pathway of lignin electrochemical conversion,inner-sphere and outer-sphere electron transfer mechanism,basic kinetics and thermodynamics in electrochemistry,and the recent embodiments analysis with the emphasis on the respective feature and limitation for lignin electrochemical oxidative and reductive conversion.Lastly,the challenge and perspective associated with lignin electrochemical biorefinery are discussed.Present-day results indicate that more work should be performed to promote efficiency,selectivity,and stability in pursuing a lignin electrochemical biorefinery.One of the most promising developing directions appears to be integrating various types of lignin electrochemical conversion strategies and other existing or evolving lignin valorization technologies.This review aims to provide more references and discussion on the development for lignin electrochemical biorefinery.展开更多
Owing to its subtropical or tropical environment and climate,South China is home to unique agricultural crops such as sugar cane,pineapple,banana,cassava,and rice,which generate a large amount of lignocellulosic agric...Owing to its subtropical or tropical environment and climate,South China is home to unique agricultural crops such as sugar cane,pineapple,banana,cassava,and rice,which generate a large amount of lignocellulosic agricultural wastes during agricultural as well as associated industrial processing.The efficient utilization of these wastes will have a significant impact on the economy and sustainable development of South China.This paper reviews the research investigations conducted both in China and elsewhere on the conversion of wastes from these subtropical or tropical agricultural crops into useful chemicals,energy,and biomaterials.The goal of this paper is to promote and summarize the extensive investigations on these agricultural wastes for the development of biorefinery.展开更多
The conversion of sugarcane lignocellulosic biomass into fuels,chemicals and high-value materials using the biochemical pathway is considered the most sustainable alternative for the implementation of future biorefine...The conversion of sugarcane lignocellulosic biomass into fuels,chemicals and high-value materials using the biochemical pathway is considered the most sustainable alternative for the implementation of future biorefineries.Actually,the first large-scale cellulosic ethanol plants that have started operating worldwide apply the enzymatic hydrolysis process to convert biomass into simple sugars that are fermented to ethanol by yeasts.However,several technological challenges still need to be addressed in order to obtain commercially competitive products.This review describes current challenges and perspectives regarding the enzymatic hydrolysis step for processing sugarcane lignocellulosic biomass within the biorefinery.Recent developments in terms of process configuration strategies and opportunities for the implementation of a sugarcane biorefinery,in which the production of ethanol is integrated into the production of high-value products such as enzymes and nanocellulose,are discussed in view of the demands of the current bioeconomy.展开更多
文摘September 22–25,2013,Dalian,China http://catbior2013.dicp.ac.cn Call For Papers 1.Congress Introduction The Organizing Committee cordially invites you to participate in the 2nd International Congress on Catalysis for Biorefineries to be
文摘September 22-25,2013,Dalian,China http://catbior2013.dicp.ac.cn Call For Papers 1.Congress Introduction The Organizing Committee cordially invites you to participate in the 2nd International Congress on Catalysis for Biorefineries to be held in Dalian from 22nd to 25th September,2013.The International Congress on Catalysis for
文摘Small-scale biorefinery from sugarcane bagasse offers new possibilities to the sugar and ethanol industries.The aim of this study was to evaluate the feasibility of a small-scale biorefinery for the production of xylitol from sugarcane bagasse.The liquid fraction from the autohydrolysis treatment was selected as the source of sugars for xylitol and two scenarios were analyzed for the residual solid:ethanol or pellet production.A technical-economic analysis of alternatives was applied.The internal rate of return(IRR)was used to compare the selected proposals.The highest IRR values were obtained when processing 70,000 dry tons per year of bagasse.The results showed promising prospects for a small-scale biorefinery with capacities above 20,000 dry tons per year(xylitol and pellets),and above 50,000 dry tons per year(xylitol and ethanol).
基金the National Key Research and Development Program of China[2018YFA0903000]Tianjin Synthetic Biotechnology Innovation Capacity Improvement Project[TSBICIPKJGG-009]+1 种基金National Natural Science Foundation of China[22011530113]Beijing Advanced Innovation Center for Soft Matter Science and Engineering.
文摘Biorefinery production of fuels and chemicals represents an attractive route for solving current energy crisis,as well as reducing green-house gas(GHG)emissions from ships,planes,and long-haul trucks.The current biorefinery industry is under transition from the use of food(1G,1st generation),to the use of biomass(2G,2nd generation).Moreover,the use of atmospheric CO_(2)(3G,3rd generation)has caught increased attention as the possible next-generation biorefinery.Here we discuss how microorganisms can be engineered for CO_(2)-based biorefineries to produce fuels and chemicals.We start through reviewing different metabolic pathways that can be recruited for CO_(2)fixation,followed by different opportunities for CO_(2)fixation,either through co-consumption with sugars or used as the sole carbon source.Key challenges and future research directions for advancing 3rd-generation biorefineries are also be discussed.
基金Material Parts Technology Development Program (20017461, Development and Performance Improvement of Air Operated Valve for 105 MPa Hydrogen Charging Station) funded by the Ministry of Trade,Industry and Energy(MOTIE, Republic of Korea)Korea Evaluation Institute of Industrial Technology (KEIT, Republic of Korea)+1 种基金financial support from the Korea Institute of Energy Technology Evaluation and Planning (KETEP)Ministry of Trade,Industry&Energy (MOTIE) of the Republic of Korea(RS-2024-00419764)。
文摘Lignocellulosic biomass is one of the viable solutions to alleviate the global warming. However, the limited utilization of biomass majorly focused on cellulose and hemicellulose restricts the economic and environmental feasibilities. To cope with this issue, we proposed an integrated process of co-producing 1,6-hexanediol(1,6-HDO) with tetrahydrofuran and adipic acid from biomass, referred to as Strategy A. To compare the impacts of lignin upgrading and feedstock, Strategy B, which co-produces tetrahydrofuran alone, and Strategy C, which is the traditional route to produce 1,6-HDO from fossil fuels, were used. Heat networks are also designed to reduce operating costs and indirect carbon emissions due to energy consumption, saving 87% and 83% of the heat and cooling requirements, respectively, in Strategy A. The market competitiveness of Strategy A was evaluated by determining the minimum selling price through techno-economic analysis, and sustainability was thoroughly investigated by quantifying the environmental impacts through both midpoint and endpoint life-cycle assessments(LCAs).Strategy A was found to be the most favorable both economically(USRDSCHARDOLLAR3,402/ton) and environmentally(-26.9 kg CO_(2)eq.). This indicates that lignin valorization is not only economically but also environmentally preferred. Finally, changes in economic and environmental feasibilities depending on economic, process, and environmental parameters were investigated using sensitivity and uncertainty analyses. The results of these analyses provide valuable insight into bio-based chemical production.
基金funded by the Thailand Graduate Institute of Science and Technology(TGIST)(Grant No.TG-BT-AIT-63-002D).
文摘The growing population and industrialization have led to significant production in agro-industrial sectors,result-ing in large amounts of agro-industrial residues often left untreated,posing potential environmental issues.There-fore,finding effective ways to utilize these bio-based residues is crucial.One promising approach is to use these low-or no-value agro-industrial wastes as raw materials for producing renewable biomaterials,including proteins and peptides.Research has extensively explored peptide extraction using plant and animal-based agro-industrial residue.Due to lower processing costs and beneficial bioactive properties,peptides derived from waste could replace synthetic peptides and those extracted from food sources.The isolation,purification,and analysis processes of these peptides are thoroughly examined to optimize their extraction and ensure their purity and efficacy.These peptides’bioactive properties and mechanisms are being analyzed for their potential applications in the biomedical field.Additionally,the applications of bioactive peptides in medical fields,such as drug delivery systems,tissue engineering,and bioprinting,are discussed.
基金support of the National Natural Science Foundation of China(22408032)the Science and Technology Research Program of Chongqing Municipal Education Commission(KJQN202000826 and KJQN202300836)+2 种基金Research Start-up Funding project of Chongqing Technology and Business University(1856011)Science and Technology Project of Chongqing Technology and Business University(2152027)Graduate Innovative Research Project from Chongqing Technology and Business University(yjscxx2024-284-29).
文摘In the last decade,shell biorefinery,a novel concept referring to the extraction of the main components of crustacean shells and the transformation of each component into valuable products,was proposed and has attracted increasing attentions.Chitin is one of main components of crustacean shells.Owing to the bio-fixed nitrogen element,chitin biomass has been regarded as a good candidate to produce nitrogen-containing chemicals.Among these,3-acetamido-5-acetylfuran(3A5AF)is an interesting furanic compound derived from the hydrolysis and sequential dehydration of chitin.Similar to cellulose-derived platform chemical 5-hydromethylfurfural(HMF),3A5AF is an emerging platform compound and also can be converted into various useful chemicals by oxidation,reduction,hydrolysis,substitution,and so on.This review showcases the recent advances in the synthesis of 3A5AF from chitin and N-acetyl glucosamine(NAG)employing various catalytic systems.The conversion of 3A5AF into valuable compounds was introduced then.There are still some challenges in this area,for example,the rational design of green and efficient catalytic systems for the synthesis of 3A5AF and its derivatives.The outlooks also were discussed at the end of the review.
基金funded by the Latvian State Institute of Wood Chemistry Bioeconomic Research Grant No.09-24 titled“Selective Valorization of Lignocellulosic Biomass(SeVaLi)”.
文摘Oat husks,a byproduct of oat milling operations with limited economic value,present a promising feedstock for biorefinery processes due to their chemical composition.This study investigates the conversion of C5 carbohydrates in oat husks into furfural through hydrothermal pretreatment using various phosphate-based catalysts,including H_(3)PO_(4),NH_(4)H_(2)PO_(4),NaH_(2)PO_(4),KH_(2)PO_(4),K_(2)HPO_(4) and K_(3)PO_(4) as catalyst.The catalysts’effectiveness in promoting furfural production was evaluated under identical hydrothermal conditions(treatment time for 60 min at a constant temperature of 170℃ and a catalyst amount).Continuous water steam was used to strip furfural from the reaction zone and minimize its degradation.Results indicated that H_(3)PO_(4) was the most effective catalyst,achieving a furfural yield of 13.99 wt.%,which corresponds to approximately 57%of the theoretical yield.NH4H2PO4 also showed moderate effectiveness,while sodium and potassium phosphate salts were significantly less effective.A scanning electron microscope analysis shows that catalysts with lower pH may disrupt the oat husks external layer thus providing a higher C5 carbohydrates conversion rate into furfural.The chemical complexity of oat husk contributes to side reactions between its carbohydrates and lignin during the hydrothermal treatment.This results in an increase in acid-insoluble lignin and inorganic matter in the oat husk lignocellulosic residue,which can reduce the effectiveness of further cellulose saccharification by enzymatic hydrolysis.
基金funded by the joint research collaboration of the Research Organization of Nanotechnology and Material,National Research and Innovation Agency(BRIN)(Grant number:8/HK/II/2024)with the title Organosolv Lignin-Based Hydrogels from Sugarcane Leaves and Their Potential as Wound Dressings with Widya Fatriasari as the Principal Investigatorthe Degree by Research(DBR)program of BRIN with scheme number:20/III.10/HK/2024 and scholarship number 4637/II.5.4/SI.06.01/7/2024 for Eko Budi Santoso。
文摘The significant amount of ash content in agricultural biomass presents an enormous challenge for efficient conversion processes.In addressing this issue,various deashing treatments have been tested and established,including simple leaching techniques,which can either be performed with or without the addition of chemical agents.These techniques hold promise for improving the deashing efficiency while potentially altering the structural and chemical composition of biomass,specifically lignin content,which is the key focus of this review.This review starts by exploring the presence of ash in agricultural residues and its impact on biomass properties.Next,this review examines deashing strategies aimed at reducing ash levels in biomass followed by analysis of the resulting changes in lignin physical and chemical properties as well as its thermal characteristics.The final part of this review is concluded by the discussion on the limitations of current approaches and the possible future directions to address the challenges covering the environmental impacts of the deashing treatments.A green process approach is emphasized as a sustainable solution with the aim to minimize negative environmental impacts associated with chemical usage during deashing.Finally,this review highlights the potential for ash recovery as a byproduct of the deashing processes,paving the way for an integrative,closed-loop approach within the biorefinery concept.
文摘Lignin is the only largest renewable aromatic resource in nature.Currently,most lignin is underutilized for low-value applications due to the complex structure and recalcitrant chemical properties.Over the past decades,extensive research has been devoted to valorizing lignin into aromatic N-heterocycles in the presence of nitrogen sources.It overcomes the element limitation,expands the products portfolio and would play a momentous role in value-added biorefinery concept.In this review,the latest research progress in the synthesis of N-heterocyclic compounds from lignin,lignin model compounds,and lignin-derived monomers(phenols,aromatic alcohols,aldehydes,ketones,and ethers)is presented.According to the structural characteristics of the products,these achievements are classified by the construction of five-,six-,and seven-membered N-heterocyclic compounds through one-step,multi-step,or one-pot multi-step reactions.Furthermore,the tailor-designed routes and catalytic systems,along with the reaction mechanisms/pathways involved are entirely discussed to elucidate the challenges regarding the structural complexity of lignin,the incompatible catalysis for C–O cleavage and C–N formation,as well as the nitrogen-heterocyclic ring construction.The prospects,future research efforts and process developments for the refining of lignin into aromatic N-heterocyclic compounds are outlined in terms of economy,environmental friendliness,and safety so as to draw some guidelines for lignin valorization.
基金supported by the National Natural Science Foundation of China(22172157,22025206)the Dalian Innovation Support Plan for High Level Talents(2022RG13),DICP(DICP I202116)+1 种基金the Youth Innovation Promotion Association(YIPA)of the Chinese Academy of Sciences(2023192)the Fundamental Research Funds for the Central Universities(20720220008)。
文摘Lignocellulosic biomass is the largest renewable hydrocarbon resource on earth.Converting cellulose,one of the major components of lignocellulose,powered by solar energy is a promising way of providing lowcarbon-footprint energy chemicals such as H_(2),HCOOH,CO,and transportation fuels.State-of-the-art biorefineries target the full use of biomass feedstocks as they have a maximum collection radius of 75-100 km,requesting efficient and selective photocatalysts that significantly influence the outcome of photocatalytic biorefineries.Well-performed photocatalysts can harvest a broad solar spectrum and are active in breaking the chemical bonds of cellulose,decreasing the capital investments of biorefineries.Besides,photocatalysts should control the selectivity of cellulose conversion,originating target products to level down separation costs.Charge separation in photocatalysts and interfacial charge transfer between photocatalysts and cellulose affect the activity and selectivity of cellulose refineries to H2 and carbonaceous chemicals.To account for the challenges above,this review summarizes photocatalysts for the refineries of cellulose and downstream platform molecules based on the types of products,with the structure features of different types of photocatalysts discussed in relation to the targets of either improving the activity or product selectivity.In addition,this review also sheds light on the methods for designing and regulating photocatalyst structures to facilitate photocatalytic refineries of cellulose and platform molecules,meanwhile summarizing proposed future research challenges and opportunities for designing efficient photocatalysts.
基金supported by the National Key R&D Program of China(2020YFA0710000)the National Natural Science Foundation of China(22122901,21902047)+1 种基金the Provincial Natural Science Foundation of Hunan(2020JJ5045,2021JJ20024,2021RC3054)the Shenzhen Science and Technology Program(JCYJ20210324140610028)。
文摘The highly selective catalytic transfer hydrogenation(CTH)of furfural(FF)to furfuryl alcohol(FOL)is a significant route of biomass valorization.Herein,a series microporous Zr-metal organic framework(ZrMOF)functionalized by sulfonic groups are prepared.Based on the comprehensive structural characterizations by means of X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),N2 physisorption,Thermogravimetric(TG)and Fourier transformed infrared spectroscopy(FTIR),we find that sulfonic acid(–SO_(3)H)functional groups are tethered on the UIO-66 without affecting the structure of the framework.Systematic characterizations(NH_(3)-TPD,CO_(2)-TPD,and in-situ FTIR)demonstrate that modifying of sulfonic groups on UIO-66 results in the formation of stronger Lewis acidic-basic and Brnsted acidis sites.The cooperative role of the versatile Lewis acidic-basic and Brnsted acidic sites in 60%mol fraction of sulfonic acid-containing UIO-66(UIO-S_(0.6))retain high surface area and exhibit excellent catalytic performance of 94.7%FOL yield and 16.9 h^(-1).turnover number(TOF)under mild conditions.Kinetic experiments reveal that the activation energy of the CTH of furfural(FF)over UIO-S_(0.6) catalyst is as low as 50.8 k J mol^(-1).Besides,the hydrogen transfer mechanism is investigated through isotope labeling experiments,exhibiting that theβ-H in isopropanol is transferred to the a-C of FF by forming six-membered intermediates on the Lewis acidic-basic and Brnsted acidic sites of the UIO-S_(0.6),which is the rate-determining step in the formation of FOL.
文摘Biomass refinery is considered to be a key technology in the 21 st century due to the importance of the sustainable production of various bioderived fuels and fine chemicals. Besides the synthesis of oxygen-containing chemicals mainly from lignocellulosic biomass, nitrogencontaining chemicals belong to some of the most important commodity and fine chemicals. In this introductory short review, the main similarities and difficulties between petroleum oil-and biorefinery will be discussed and future challenges will be highlighted. As a particular example, recent developments in the shell biorefinery – the utilization of shell waste – will be reviewed. Particular emphasis will be placed on the structure of shell biomass, the current and emerging fractionation methods and the conversion of chitin and chitosan to various heteroatomcontaining chemicals. This review is meant to provide an introduction to beginners in the field of biorefinery as well as a comprehensive discussion of recent proceedings in the field of shell biorefinery. An outlook on the future potential and challenges will be given.
基金financial support from the Research Support Foundation of the State of Rio Grande do Sul (Grant No. 00189725.51/13S-I4)
文摘This study investigated the use of leftover biomass(rice husks)as the raw material for the biotechnological production of platform chemicals and biopolymers.Following the biorefinery concept,different acid hydrolysates were studied and resulted into a wide range of treatment strategies.Chemometrics were applied throughout the procedures in multivariate experimental conditions.By using the best hydrolytic conditions of 6.0%H3PO4,135oC(45 MPa)and reaction time of 62 min,21.0 g/L sugar hydrolysates were produced;by using the best hydrolytic condition of 4.5%HNO3,135oC/35 min,16.1 g/L sugar hydrolysates were produced;and with the hydrolysates use of 1.5%H2SO4 and 1.5%HCl,135oC/62 min,18.2 and 17.8 g/L sugar hydrolysates were produced,respectively.The highest productivity,in terms of fermentable sugars,reached 68%of integral cellulose/hemicellulose fraction and surpassed those found in the literature,with regard to the processing of rice husks,by considering just one step process.Sulfuric hydrolysate,detoxified with active carbon,was used to prove this proposal viability,resulting in a fermentation substrate for A.terreus(ATCC10020)and R.radiobacter(LMG196)strains(natural producers of bioproducts),which certified the feasibility of the proposal.The production of fermentable sugars from leftover biomass should encourage a search for new bioconversion routes,which can result in economic and environmental benefits and a spread of knowledge.
基金supported by the National Nature Science Foundation of China (32222058, 32001274)the Youth Talent Support Program for Science & Technology Innovation of National Forestry and Grassland (2019132603) for financial support。
文摘Converting carbohydrates into 5-hydroxymethylfurfural(5-HMF) is an attractive and promising route for value-added utilization of agricultural and forestry biomass resource. As an important platform compound, 5-HMF possesses high active furan structure with hydroxymethyl and aldehyde group for production of various bio-chemicals and materials, meanwhile, which suffer from low stability and poor yield during the industrial biorefinery process. Hence, selective production of 5-HMF with high-yield and low-cost has attracted extensive attention from scientific and industrial researchers. This review sorted and described the latest advanced research on solvent and catalyst system, as well as energy field effect for production of 5-HMF with different feedstock in detail, emphatically discussing the solvent effect and its synergistic effect with other aspects. Besides, the future prospects and challenges for production of 5-HMF from carbohydrates were also presented, which provide a profound insight into industrial 5-HMF process with economic and environmental feature.
基金the institutional research funding supported by SRUC,UK。
文摘Machine learning(ML)has emerged as a significant tool in the field of biorefinery,offering the capability to analyze and predict complex processes with efficiency.This article reviews the current state of biorefinery and its classification,highlighting various commercially successful biorefineries.Further,we delve into different categories of ML models,including their algorithms and applications in various stages of biorefinery lifecycle,such as biomass characterization,pretreatment,lignin valorization,chemical,thermochemical and biochemical conversion processes,supply chain analysis,and life cycle assessment.The benefits and limitations of each of these algorithms are discussed in detail.Finally,the article concludes with a discussion of the limitations and future prospects of ML in the field of biorefineries.
基金the financial support from the Beijing Natural Science Foundation (6174046)the Research Fund for the Doctoral Programme of Higher Education of China (20120014120004)
文摘With the continued depletion of non-renewable energy resources,it is essential to seek new methods of harnessing clean and renewable energy.In this regard,second-generation bioethanol derived from lignocellulosic biomass has attracted increasing attention in recent years.The choice of the pretreatment method of lignocellulose is critical to the subsequent bioconversion processes.Compared with other conventional chemical pretreatment methods,hydrothermal pretreatment is a simple,low-cost,and economically feasible process that requires water as the only reagent.This paper reviews the research efforts that have been made toward hydrothermal pretreatment of lignocellulosic biomass and focuses on the transformations involving cellulose,hemicellulose,and lignin during this process.
基金supported by the National Natural Science Foundation of China(21876030)the International Cooperation Project of Science and Technology Commission of Shanghai Municipality(18230710700)。
文摘Recalcitrance and the inherent heterogeneity of lignin structure are the major bottlenecks to impede the popularization of lignin-based chemicals production processes.Recent works suggested a promising pathway for lignin depolymerization and lignin-derived bio-oil upgrading via an electrochemical biorefinery(a process in which lignin valorization is performed via electrochemical oxidation or reduction).This review presents the progress on chemicals synthesis and bio-oil upgrading from lignin by an electrochemical biorefinery,relating to the lignin biosynthesis pathway,reaction pathway of lignin electrochemical conversion,inner-sphere and outer-sphere electron transfer mechanism,basic kinetics and thermodynamics in electrochemistry,and the recent embodiments analysis with the emphasis on the respective feature and limitation for lignin electrochemical oxidative and reductive conversion.Lastly,the challenge and perspective associated with lignin electrochemical biorefinery are discussed.Present-day results indicate that more work should be performed to promote efficiency,selectivity,and stability in pursuing a lignin electrochemical biorefinery.One of the most promising developing directions appears to be integrating various types of lignin electrochemical conversion strategies and other existing or evolving lignin valorization technologies.This review aims to provide more references and discussion on the development for lignin electrochemical biorefinery.
基金support from China Postdoctoral Science Foundation(2016M590783)the Foundation of Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education of China(KF2015013)
文摘Owing to its subtropical or tropical environment and climate,South China is home to unique agricultural crops such as sugar cane,pineapple,banana,cassava,and rice,which generate a large amount of lignocellulosic agricultural wastes during agricultural as well as associated industrial processing.The efficient utilization of these wastes will have a significant impact on the economy and sustainable development of South China.This paper reviews the research investigations conducted both in China and elsewhere on the conversion of wastes from these subtropical or tropical agricultural crops into useful chemicals,energy,and biomaterials.The goal of this paper is to promote and summarize the extensive investigations on these agricultural wastes for the development of biorefinery.
文摘The conversion of sugarcane lignocellulosic biomass into fuels,chemicals and high-value materials using the biochemical pathway is considered the most sustainable alternative for the implementation of future biorefineries.Actually,the first large-scale cellulosic ethanol plants that have started operating worldwide apply the enzymatic hydrolysis process to convert biomass into simple sugars that are fermented to ethanol by yeasts.However,several technological challenges still need to be addressed in order to obtain commercially competitive products.This review describes current challenges and perspectives regarding the enzymatic hydrolysis step for processing sugarcane lignocellulosic biomass within the biorefinery.Recent developments in terms of process configuration strategies and opportunities for the implementation of a sugarcane biorefinery,in which the production of ethanol is integrated into the production of high-value products such as enzymes and nanocellulose,are discussed in view of the demands of the current bioeconomy.
