Alternative methods for biodiesel purification that focus on ease of operation,cost reduction,and elimination of contaminated residues or that are easier to treat have received more attention.The dry wash route was us...Alternative methods for biodiesel purification that focus on ease of operation,cost reduction,and elimination of contaminated residues or that are easier to treat have received more attention.The dry wash route was used as an alternative to the wet route in biodiesel production.Filter membranes were developed based on cellulose nanofibers as the matrix and sugarcane bagasse fibers or soy hulls,as reinforcement to the matrix,before and after two chemical treatments(carboxymethylation and regeneration with sulfuric acid).The filters were characterized by permeability capacity,morphology,wettability,porosity,SEM and mechanical properties.The filtered biodiesel was also completely characterized.One of the major impacts of dry purification of biodiesel was the glycerin content after filtration.The filters CNFBR 20-28,CNFSR 5-28,CNFSR 5-35,and CNFBC 5-28 produced purified biodiesel with glycerin content below 0.02%(200 mg/L).Another relevant fact is related to the best results for acidity index,combined alkalinity,and glycerin content,obtained by the regenerated filter CNFBR 20-28,which presented a considerable permeate flow rate value above 4145 L h^(-1) m^(-2),which can be related to compacted lamellar layers observed by SEM.The produced filters were applied to biodiesel purification using a low-pressure filtration system and a simple vacuum pump,which resulted in an appreciable reduction in cost.The produced filter with sugarcane bagasse fiber carboxymethylated at 28 mesh of granulometry was efficient for biodiesel purification,including the efficient removal of free glycerin,in agreement with the standards defined by the national controlling agencies.展开更多
Sugarcane bagasse(SCB)is a promising natural fiber for bio-based composites,but its high moisture absorption and poor interfacial adhesion with polymer matrices limit mechanical performance.While chemical treatments h...Sugarcane bagasse(SCB)is a promising natural fiber for bio-based composites,but its high moisture absorption and poor interfacial adhesion with polymer matrices limit mechanical performance.While chemical treatments have been extensively explored,limited research has addressed how thermal treatment alone alters the surface properties and reinforcing behavior of SCB fibers.This study aims to fill that gap by investigating the effects of heat treatment on SCB fiber structure and its performance in starch/poly(vinyl alcohol)(PVA)composites.Characterization techniques including Fourier transform infrared spectroscopy(FTIR),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),and scanning electron microscopy(SEM)were employed to analyze changes in fiber morphology,surface chemistry,and crystallinity.Mechanical properties were assessed via tensile,flexural,and impact testing,and moisture absorption was also evaluated.Composites reinforced with SCB fibers treated at 200○C exhibited significantly superior mechanical properties compared to those prepared with untreated or differently treated fibers.The tensile,flexural,and impact performance of the composites were 15.13,19.37 MPa,and 7.28 J/m,respectively.Composites treated at this temperature also retained better mechanical properties after exposure to humidity.These findings demonstrate that heat treatment is a simple and sustainable method to improve the durability and mechanical performance of nature fiber-reinforced composites,expanding their potential for environmentally friendly material applications.展开更多
This work quantifies the thermal performance of natural composite blocks made from Yapatera diatomaceous earth reinforced with sugarcane bagasse fibres.Prismatic specimens(185×185 mm)with three thicknesses(≈76 m...This work quantifies the thermal performance of natural composite blocks made from Yapatera diatomaceous earth reinforced with sugarcane bagasse fibres.Prismatic specimens(185×185 mm)with three thicknesses(≈76 mm,100 mm,and 150 mm)and bagasse contents of 5–15%(wt.)were tested at hot-face temperatures of 100,250,and 450℃in a full-factorial 3×3×3 plan(54 tests).Thermal conductivity(k)was measured using a guarded hot-plate device aligned with ASTM D5470/E1530/C177.The measured k averaged 0.125 W/m·K(range~0.088–0.220 W/m·K)and remained stable in function up to 500℃.ANOVA showed that temperature and thickness significantly increased k(p<0.05),while fibre content had a weaker,non-monotonic effect beyond~10%.A response-surface model(RSM)provided accurate predictions(R^(2)≈0.95).For design purposes,thermal resistance was computed as R=Δx/k.A 150 mm block yielded R≈1.20 m^(2)K/W,comparable to~0.40 m of hollow ceramic brick and>1.0 m of concrete to reach a similar R.The composite therefore occupies a distinct niche:medium-performance insulation with high-temperature stability(≤500℃),low embodied energy(air-dried manufacturing,agro-waste feedstock),and competitive cost potential.These results support its use in industrial and building applications where conventional insulators are unsustainable or operate below the required temperature window.展开更多
Biocomposites are one of the environmentally friendlymaterials as a substitute for synthetic plastics used for various applications in the automotive,household appliances industry,and interiors.In this study,biocompos...Biocomposites are one of the environmentally friendlymaterials as a substitute for synthetic plastics used for various applications in the automotive,household appliances industry,and interiors.In this study,biocomposites from Polylactic Acid(PLA)and sugarcane bagasse fibers(SBF)were made using the 3D Printing method.The effect of alkalization with NaOH of 0(untreated),4%,6%,and 8%of the fibers were studied.The SBF in PLA was kept at 2%v/v from the total biocomposite.The characterization of all biocomposite tested using tensile,flexural,impact,scanning electron microscope(SEM),thermogravimetric analysis(TGA),and Fourier TransformInfrared(FTIR).The tensile test results showed that the 6%NaOH concentration on the fibers had the highest tensile strength of 34.59MPa compared to pure PLA.Theflexural and impact strengths of the biocomposite samples in the treatment also showed the highest results of 45.62MPa and 45.03 kJ/m^(2),respectively.SEMimaging also confirmed the presence of good bonding between the matrix and fibers.The thermal stability of biocomposite showed an increase in the degradation point after alkalization.There was a change in the chemical functional group in the biocomposite with fibers treated by 6%NaOH at a wavenumber of 1150–1030 cm^(−1).These results indicate that PLA biocomposites have competitive properties for application in various industrial sectors.展开更多
Natural rubber(NR)foams are widely used.However,further studies are required for preparing eco-friendly NR foam and determining the optimum physical properties appropriate for application.This study aims to create an ...Natural rubber(NR)foams are widely used.However,further studies are required for preparing eco-friendly NR foam and determining the optimum physical properties appropriate for application.This study aims to create an NR foam from rubber reinforced with sugarcane bagasse ash(SCBA)and sodium alginate.The results showed that the SCBA was primarily composed of silica or silicon dioxide(87.52%by weight)and carbon(11.41%by weight).This study investigated the influence of the amount of sodium alginate(0-5 phr)used in the NR foam formation.The addition of SCBA on the NR foam affected the density,swelling behavior,and crosslink density of the foam.The results identified an optimal loading level that improved the density and morphology of the foam.The hardness and modulus of the NR foam increased with increasing amounts of SCBA,suggesting insufficient reinforcement.The NR exhibited the highest compressive stress at the SCBA concentration of 5 phr.This study facilitates the development of NR as green material and other support materials.展开更多
The reduction roasting processes for low-grade pyrolusite using bagasse as the reducing agent was statistically analyzed. The central composite rotatable design （CCD） was used to optimize this reduction roasting pro...The reduction roasting processes for low-grade pyrolusite using bagasse as the reducing agent was statistically analyzed. The central composite rotatable design （CCD） was used to optimize this reduction roasting processes. The three process parameters studied were the mass ratio of bagasse to ore, the roasting temperature and the roasting time. Analysis of variance （ANOVA） was used to analyze the experimental results. The interactions between the process parameters were done by using the linear and quadratic model. The results revealed that the linear and quadratic effects as well as the interaction are statistically significant for the mass ratio and roasting temperature but insignificant for the roasting time. The optimal conditions of 0.9：10 of mass ratio, the roasting temperature of 450 ~C, the roasting time of 30 min were obtained. Under these conditions, the predicted leaching recovery rate for manganese was 98.1%. And the satisfied experimental result of 98.2% confirmed the validity of the model.展开更多
[Objective]The study aimed to screen the starch-degrading bacterium in bagasse and carry on the identification of strains s2g5-1 and s3g4-8.[Method]By using a variety of selective media,varieties of starch degrading b...[Objective]The study aimed to screen the starch-degrading bacterium in bagasse and carry on the identification of strains s2g5-1 and s3g4-8.[Method]By using a variety of selective media,varieties of starch degrading bacterium were isolated from the sugar cane bagasse form different stages of natural fermentation,then,primary screening and secondary screening were performed.[Result] Starch-degrading strains s2g5-1 and s3g4-8 were screened,and they were identified as Bacillus amyloliquefaciens according to their morphological,physiological,biochemical and molecular characteristics.[Conclusion]The research provided theoretical basis for factory application of bagasse.展开更多
In the recent decades oil spills in the aquatic environments are one of the major sources of environmental pollutions, which are steadily growing with the increase in oil consumption. Adsorption is a rapid and cost ef...In the recent decades oil spills in the aquatic environments are one of the major sources of environmental pollutions, which are steadily growing with the increase in oil consumption. Adsorption is a rapid and cost effective process to minimize the environmental impacts of oil spills and cleanup these pollutants. In this work, the crude oil sorption capacity was examined with raw sugarcane bagasse and acetylated sugarcane bagasse. Results show that the acetylated bagasse was significantly more oleophilic than the raw bagasse and acetylation reaction can increase bagasse oil sorption ability by about 90%. The maximum sorption capacities of acetylated bagasse were obtained about 11.3 g and 9.1 g in dry system(crude oil sorption) and oil layer sorption, respectively. The physicochemical characteristics of the sorbents such as composition, water solubility, moisture content and density were measured according to ASTM standard methods. Also Fourier transform infrared spectroscopy(FTIR) of raw and acetylated bagasse was performed to investigate the effect of acetylation on sugarcane bagasse structure.展开更多
In this work, a modification of the sugarcane bagasse is performed, in order to obtain organic catalysts. The bagasse analysis is performed using X-ray diffraction (XRD) and Fourier Transformer Infrared Spectroscopy (...In this work, a modification of the sugarcane bagasse is performed, in order to obtain organic catalysts. The bagasse analysis is performed using X-ray diffraction (XRD) and Fourier Transformer Infrared Spectroscopy (FTIR), which indicated that characteristic peaks determined its chemical compounds. In addition, Scanning Electron Microscopy (SEM) is used to know the morphology. Finally, a discoloration test is conducted on an azo compound (methylene blue) in an aqueous medium, obtaining an efficiency of 98.6%.展开更多
A new approach,named production of aryl oxygen-containing compounds from the catalytic pyrolysis of bagasse lignin(BL) over perovskite oxide,was proposed,A series of LaTixFe1-xO3(LTF-x) samples were prepared by the so...A new approach,named production of aryl oxygen-containing compounds from the catalytic pyrolysis of bagasse lignin(BL) over perovskite oxide,was proposed,A series of LaTixFe1-xO3(LTF-x) samples were prepared by the solid state reaction method.The crystal phase and morphology of LTF-x were characterized by XRD and SEM respectively.Catalytic pyrolysis performance of LTF-x was performed by TG-DTG and the distribution patterns of gaseous,liquid and solid products from BL was investigated using a fixed-bed micro-reactor.The optimal reaction conditions were determined:the pyrolysis temperature was 600℃,the mass ratio of mBL:mLTF-0.2 was 3:1,the veloeity of earrier gas was 100 ml·min-1.The gaseous produets were mainly eomposed of CO2,CO,CH4 and CnHm(n=2-4,m=2 n+2 or m=2 n),The main aryl oxygen-containing compounds in liquid products were phenolics,guaiacols,syringols and phenylates,the rest were benzenes,furans,esters and carboxylic acid.The total contents of aryl oxygencontaining compounds were from 62% up to more than 72% under the action of the perovskite.Moreover,the LTF-0.2 sample had nice regenerability.展开更多
To realize the resource and high-value utilization,a new approach,named bagasse lignin(BL) used to produce aryl oxygen-containing compounds by catalytic pyrolysis over perovskite,was proposed,LaTi0.2Fe0.8O3(LTF) sampl...To realize the resource and high-value utilization,a new approach,named bagasse lignin(BL) used to produce aryl oxygen-containing compounds by catalytic pyrolysis over perovskite,was proposed,LaTi0.2Fe0.8O3(LTF) samples prepared by the sol-gel method(SG) and the solid-state reaction method(SS)were characterized.The catalytic action on BL pyrolysis was performed by the test of TG-DTG and the evaluation of the fixed bed micro-reactor,the components and contents of the products were determined.The results show that LTF samples have cubic perovskite phase,LTF prepared by SG(LTF-SG) is porous with larger specific surface area than LTF prepared by SS(LTF-SS).During the pyrolysis of BL,the addition of LTF lowers the pyrolysis temperature and the activation energy,the contents of CO2 and CO in gaseous products reduce by 4.6%-8.0% and 30.7%-34.3%,respectively,the total content of aryl oxygencontaining compounds(including phenolics,guaiacols,syringols and phenylates) in liquid products increases from 62 wt% to more than 72 wt%,and LTF-SG shows better catalytic performance.LTF samples have nice phase and catalytic stabilities for BL pyrolysis after five successive redox cycles.展开更多
LaTi(0.2)Fe(0.8)O3(LTF)was prepared by the sol-gel method,and the effects of calcination temperature on the structure and properties were investigated,A new method of preparing aryl oxygen-containing compounds from ba...LaTi(0.2)Fe(0.8)O3(LTF)was prepared by the sol-gel method,and the effects of calcination temperature on the structure and properties were investigated,A new method of preparing aryl oxygen-containing compounds from bagasse lignin(BL)by the catalytic pyrolysis over LTF was proposed.The results show that LTF has cubic crystal phase and porous structure and its optimal calcination temperature is 800℃(LTF-800).In the test for catalytic pyrolysis of BL,with the addition of LTF-800,the yield of liquid product reaches the maximum;the contents of phenolics,guaiacols,syringols,phenylates and furans increase obviously,while those of benzenes,esters and carboxylic acid decrease.The total content of aryl oxygencompounds(including phenolics,guaiacols,syringols and phenylates)in liquid product is more than 74 wt%with the addition of LTF-800,larger than that obtained by single BL pyrolysis(62 wt%).LTF could avoid oxygen-containing functional groups from being excessively destroyed.It has nice regeneration performance by controlled combustion of char even after 5 cycles.展开更多
The aim of this study was to evaluate the effect of Lactobacillus acidophilus（LAC）, exogenous enzymes of ZAD（exogenous enzyme preparation） or their combination on feed conversion, and dressing of rabbits fed diffe...The aim of this study was to evaluate the effect of Lactobacillus acidophilus（LAC）, exogenous enzymes of ZAD（exogenous enzyme preparation） or their combination on feed conversion, and dressing of rabbits fed different treatments of sugarcane bagasse（SCB）. Five rations were allotted randomly to five groups of New-Zealand White（NZW） rabbits（n=10） with initial live body weight of（838±42.4） g and 5 weeks of age. Rabbits were fed on diets with different sources of fiber as follows,（i） a control diet composed of 100% berseem hay and 0% SCB,（ii） 50% berseem hay and 50% untreated SCB（USCB）,（iii） 50% berseem hay and 50% SCB treated with L. acidophilus（LAC）,（iv） 50% berseem hay and 50% SCB treated with ZAD（ZAD）, and（v） 50% berseem hay and 50% SCB treated with a combination of LAC＋ZAD（LZ）. Treatments of SCB with L. acidophilus, ZAD and LAC＋ZAD had the highest feed conversion ratio than both USCB and control. The dressing percentage of rabbits that fed the LAC and LZ diets was higher（P〈0.05） compared with that in the other groups. Performance index（PI） for LAC group was improved（P〈0.05） compared to that for the other groups; however, PI for USCB group was the lowest（P〈0.05）. It could be concluded that treating SCB with L. acidophilus, exogenous enzymes of ZAD or their combination improved feed conversion and performance with more positive effects with L. acidophilus than the other treatments.展开更多
The reduction behavior and metallization degree of magnetite concentrate with agave bagasse were investigated in an inert atmosphere.The effects of temperature,biomass content,and residence time on reduction experimen...The reduction behavior and metallization degree of magnetite concentrate with agave bagasse were investigated in an inert atmosphere.The effects of temperature,biomass content,and residence time on reduction experiments and metallization degree were investigated by X-ray diffraction and scanning electron microscopy.Compared with other types of biomass,agave bagasse had lower contents of nitrogen,sulfur,and ash.X-ray diffraction analysis showed that the metallization degree improved with increasing temperature and biomass content.Complete metallization was achieved at 1100℃ for 30 min with 65:35 and 50:50 ratios of the magnetite concentrate to the agave bagasse.These results demonstrate that agave bagasse promotes the efficient metallization of magnetite concentrate without the external addition of a reducing agent.Therefore,this biomass is a technical suitable alternative to replace fossil fuels in steelmaking.展开更多
Pyrolysis of bagasse followed by thermal cracking of tar was carded out at atmospheric pressure using a dual bed reactor. The first bed was used for the pyrolysis and the second bed was used for thermal cracking of ta...Pyrolysis of bagasse followed by thermal cracking of tar was carded out at atmospheric pressure using a dual bed reactor. The first bed was used for the pyrolysis and the second bed was used for thermal cracking of tar. Iron fillings were used as the packed bed material in the second bed. The effects of reaction time （20 to 40 rain）, reactor temperature （600 to 900 ℃） and packed bed height （40-100 mm） on the product （char, tar and gas） yield and gas （H2, CO, CO2, CH4, CnHm） composition were studied. Over the ranges of the experimental conditions used, the operating conditions were optimized for pyrolysis temperature around 850 ℃, a reaction time of 30 min and packed bed height of 100 mm, thus we could obtain a gas richer in hydrogen and carbon monoxide and poorer in carbon dioxide and hydrocarbons. It was observed that compared with single bed process, dual bed process increased the gas yield from 0.397 to 0.750 m3/kg and decreased the tar yield from 0.445 to 0.268 g/g while the heating value of the product gas remained almost constant （10-11 M J/m3）.展开更多
Bagasse fibers were modified using NaOH, KH550, and NaOH/KH550, respectively, and used as reinforcement to prepare bagasse/starch/PVA composite. A combination of Fourier-transform infrared(FTIR) spectroscopy and X-ray...Bagasse fibers were modified using NaOH, KH550, and NaOH/KH550, respectively, and used as reinforcement to prepare bagasse/starch/PVA composite. A combination of Fourier-transform infrared(FTIR) spectroscopy and X-ray diffraction(XRD) was used to investigate the chemical composition. The surface of bagasse fibers and cross-sectional morphologies for bagasse/starch/PVA composite were also characterized by scanning electron microscopy(SEM). Contact angles were measured to test the wettability of the resulting composite. After the chemical treatment with NaOH/KH550, the mechanical properties of the composite can be greatly improved. The contact angle is larger, indicating the variation of surface property from hydrophilicity into hydrophobicity.展开更多
Sugarcane bagasse was pyrolyzed using a laboratory fixed bed reactor to produce char and its by-product(pyrolysis liquid).The pyrolysis experiments were carried out using different temperatures(400℃ and 500℃),heatin...Sugarcane bagasse was pyrolyzed using a laboratory fixed bed reactor to produce char and its by-product(pyrolysis liquid).The pyrolysis experiments were carried out using different temperatures(400℃ and 500℃),heating rate(1℃/min and 10℃/min),and holding time(30 min and 60 min).Char was characterized according to its thermal properties,while the pyrolysis liquid was tested for its anti-fungal and anti-termite activities.Pyrolysis temperature and heating rate had a significant influence on the char properties and the yield of char and pyrolysis liquid,where a high-quality char and high yield of pyrolysis liquid can be obtained at a temperature of 500℃ and a heating rate of 10℃/min.The yield of char and pyrolysis liquid was 28.97%and 55.46%,respectively.The principal compounds of pyrolysis liquid were water,acetic acid,glycolaldehyde,1-hydroxy-2-propanone,methanol,formic acid,levoglucosan,furfural,followed by some phenol compounds and guaiacol derivatives.Pyrolysis liquid at a concentration of 0.20%and 0.25%(v/v)caused a 100%inhibition of Coniophora puteana and Trametes versicolor,respectively,when performing inhibition growth tests in Petri dishes.Filter paper treated with 10%of pyrolysis liquid caused 100%of termite mortality,while only 5.65%–7.03%of the treated filter papers consumed by termites at such concentration.Pyrolysis liquid is potentially effective to be used in the formulation of wood protection against fungi and termites.展开更多
The effect of Bagasse ash （BAp） particle reinforcement on the wear behavior of Al-Cu- Mg alloy has been studied. Bagasse ash particles were varied from 0 wt pct-10 wt pct with interval of 2 wt pct. Unlubricated pin-...The effect of Bagasse ash （BAp） particle reinforcement on the wear behavior of Al-Cu- Mg alloy has been studied. Bagasse ash particles were varied from 0 wt pct-10 wt pct with interval of 2 wt pct. Unlubricated pin-on disc tests were conducted to examine the wear behaviour of the aluminium alloy/Bagasse ash particulate composites. The tests were conducted at varying loads, from 5 to 20 N and sliding speeds of 1.26 m/s, 2.51 m/s, 3.77 m/s and 5.02 m/s for a constant sliding distance of 5000 m. The results showed that the wear rates of the A1-Cu-Mg/BAp composites are lower than that of the matrix alloy and further decrease with increasing Bagasse ash content. Wear rate increases as the sliding speed and applied load increase. The microstructure of the worn surface revealed that a large amount of plastic deformation appeared on the surface of the unreinforced alloy. While Bagasse ash reinforced Al-Cu-Mg alloy showed worn out surface that is not smooth, and grooves, scratches and parallel lines were observed. A combination of adhesion and delamination wear was in operation. These results show that improve wear properties is achievable for the aluminium alloy by the addition of Bagasse ash particles as reinforcement material.展开更多
Bagasse fly ash was converted into an inexpensive adsorbent andutilized for the removal of β- naphthalenesulfonic acid in dilutesolution. The effect of pH, temperature, adsorbent concentration, andco-existed acids on...Bagasse fly ash was converted into an inexpensive adsorbent andutilized for the removal of β- naphthalenesulfonic acid in dilutesolution. The effect of pH, temperature, adsorbent concentration, andco-existed acids on the removal of β-naphthalenesulfonic acid wasexamined. The adsorption data have been correlated with both Langmuirand Freundlich adsorption models. Thermodynamic parameters obtainedindicate the feasibility of the process, and kinetic studies providedthe necessary mechanistic information of the removal process.展开更多
基金supported by the Minas Gerais State’s Foundation for Research Support(FAPEMIG,Brazil,Process CEX-APQ-01651-17,RED-00224-23,and PPM-00645-17).
文摘Alternative methods for biodiesel purification that focus on ease of operation,cost reduction,and elimination of contaminated residues or that are easier to treat have received more attention.The dry wash route was used as an alternative to the wet route in biodiesel production.Filter membranes were developed based on cellulose nanofibers as the matrix and sugarcane bagasse fibers or soy hulls,as reinforcement to the matrix,before and after two chemical treatments(carboxymethylation and regeneration with sulfuric acid).The filters were characterized by permeability capacity,morphology,wettability,porosity,SEM and mechanical properties.The filtered biodiesel was also completely characterized.One of the major impacts of dry purification of biodiesel was the glycerin content after filtration.The filters CNFBR 20-28,CNFSR 5-28,CNFSR 5-35,and CNFBC 5-28 produced purified biodiesel with glycerin content below 0.02%(200 mg/L).Another relevant fact is related to the best results for acidity index,combined alkalinity,and glycerin content,obtained by the regenerated filter CNFBR 20-28,which presented a considerable permeate flow rate value above 4145 L h^(-1) m^(-2),which can be related to compacted lamellar layers observed by SEM.The produced filters were applied to biodiesel purification using a low-pressure filtration system and a simple vacuum pump,which resulted in an appreciable reduction in cost.The produced filter with sugarcane bagasse fiber carboxymethylated at 28 mesh of granulometry was efficient for biodiesel purification,including the efficient removal of free glycerin,in agreement with the standards defined by the national controlling agencies.
文摘Sugarcane bagasse(SCB)is a promising natural fiber for bio-based composites,but its high moisture absorption and poor interfacial adhesion with polymer matrices limit mechanical performance.While chemical treatments have been extensively explored,limited research has addressed how thermal treatment alone alters the surface properties and reinforcing behavior of SCB fibers.This study aims to fill that gap by investigating the effects of heat treatment on SCB fiber structure and its performance in starch/poly(vinyl alcohol)(PVA)composites.Characterization techniques including Fourier transform infrared spectroscopy(FTIR),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),and scanning electron microscopy(SEM)were employed to analyze changes in fiber morphology,surface chemistry,and crystallinity.Mechanical properties were assessed via tensile,flexural,and impact testing,and moisture absorption was also evaluated.Composites reinforced with SCB fibers treated at 200○C exhibited significantly superior mechanical properties compared to those prepared with untreated or differently treated fibers.The tensile,flexural,and impact performance of the composites were 15.13,19.37 MPa,and 7.28 J/m,respectively.Composites treated at this temperature also retained better mechanical properties after exposure to humidity.These findings demonstrate that heat treatment is a simple and sustainable method to improve the durability and mechanical performance of nature fiber-reinforced composites,expanding their potential for environmentally friendly material applications.
基金supported by the 2022 Teaching Research Projects Competition of Santo Toribio de Mogrovejo Catholic University(USAT),under grant number 1 under the title:“Adding Value to Sugar Cane Bagasse and Yapatera Diatomaceous Earth as a Composite Material for Thermal Insulation”.
文摘This work quantifies the thermal performance of natural composite blocks made from Yapatera diatomaceous earth reinforced with sugarcane bagasse fibres.Prismatic specimens(185×185 mm)with three thicknesses(≈76 mm,100 mm,and 150 mm)and bagasse contents of 5–15%(wt.)were tested at hot-face temperatures of 100,250,and 450℃in a full-factorial 3×3×3 plan(54 tests).Thermal conductivity(k)was measured using a guarded hot-plate device aligned with ASTM D5470/E1530/C177.The measured k averaged 0.125 W/m·K(range~0.088–0.220 W/m·K)and remained stable in function up to 500℃.ANOVA showed that temperature and thickness significantly increased k(p<0.05),while fibre content had a weaker,non-monotonic effect beyond~10%.A response-surface model(RSM)provided accurate predictions(R^(2)≈0.95).For design purposes,thermal resistance was computed as R=Δx/k.A 150 mm block yielded R≈1.20 m^(2)K/W,comparable to~0.40 m of hollow ceramic brick and>1.0 m of concrete to reach a similar R.The composite therefore occupies a distinct niche:medium-performance insulation with high-temperature stability(≤500℃),low embodied energy(air-dried manufacturing,agro-waste feedstock),and competitive cost potential.These results support its use in industrial and building applications where conventional insulators are unsustainable or operate below the required temperature window.
基金funded and supported by the Institute of Research and Community Service(LPPM),Universitas Jember,for International Research Collaboration Scheme with project number:3565/UN25.3.1/LT/2023.
文摘Biocomposites are one of the environmentally friendlymaterials as a substitute for synthetic plastics used for various applications in the automotive,household appliances industry,and interiors.In this study,biocomposites from Polylactic Acid(PLA)and sugarcane bagasse fibers(SBF)were made using the 3D Printing method.The effect of alkalization with NaOH of 0(untreated),4%,6%,and 8%of the fibers were studied.The SBF in PLA was kept at 2%v/v from the total biocomposite.The characterization of all biocomposite tested using tensile,flexural,impact,scanning electron microscope(SEM),thermogravimetric analysis(TGA),and Fourier TransformInfrared(FTIR).The tensile test results showed that the 6%NaOH concentration on the fibers had the highest tensile strength of 34.59MPa compared to pure PLA.Theflexural and impact strengths of the biocomposite samples in the treatment also showed the highest results of 45.62MPa and 45.03 kJ/m^(2),respectively.SEMimaging also confirmed the presence of good bonding between the matrix and fibers.The thermal stability of biocomposite showed an increase in the degradation point after alkalization.There was a change in the chemical functional group in the biocomposite with fibers treated by 6%NaOH at a wavenumber of 1150–1030 cm^(−1).These results indicate that PLA biocomposites have competitive properties for application in various industrial sectors.
基金supported by the Thailand Science Research and Innovation,National Science Research and Innovation Fund and the Fundamental Fund(FF 2023).
文摘Natural rubber(NR)foams are widely used.However,further studies are required for preparing eco-friendly NR foam and determining the optimum physical properties appropriate for application.This study aims to create an NR foam from rubber reinforced with sugarcane bagasse ash(SCBA)and sodium alginate.The results showed that the SCBA was primarily composed of silica or silicon dioxide(87.52%by weight)and carbon(11.41%by weight).This study investigated the influence of the amount of sodium alginate(0-5 phr)used in the NR foam formation.The addition of SCBA on the NR foam affected the density,swelling behavior,and crosslink density of the foam.The results identified an optimal loading level that improved the density and morphology of the foam.The hardness and modulus of the NR foam increased with increasing amounts of SCBA,suggesting insufficient reinforcement.The NR exhibited the highest compressive stress at the SCBA concentration of 5 phr.This study facilitates the development of NR as green material and other support materials.
基金Projects (20866001, 21166003, 51164002) supported by the National Natural Science Foundation of ChinaProject (20114501110004)supported by the Ph.D. Programs Foundation of Ministry of Education of China
文摘The reduction roasting processes for low-grade pyrolusite using bagasse as the reducing agent was statistically analyzed. The central composite rotatable design （CCD） was used to optimize this reduction roasting processes. The three process parameters studied were the mass ratio of bagasse to ore, the roasting temperature and the roasting time. Analysis of variance （ANOVA） was used to analyze the experimental results. The interactions between the process parameters were done by using the linear and quadratic model. The results revealed that the linear and quadratic effects as well as the interaction are statistically significant for the mass ratio and roasting temperature but insignificant for the roasting time. The optimal conditions of 0.9：10 of mass ratio, the roasting temperature of 450 ~C, the roasting time of 30 min were obtained. Under these conditions, the predicted leaching recovery rate for manganese was 98.1%. And the satisfied experimental result of 98.2% confirmed the validity of the model.
基金Supported by the Central Public-interest Scientific Institution Basal Research Fund(2008hzs1J021,2009hzs1J033)~~
文摘[Objective]The study aimed to screen the starch-degrading bacterium in bagasse and carry on the identification of strains s2g5-1 and s3g4-8.[Method]By using a variety of selective media,varieties of starch degrading bacterium were isolated from the sugar cane bagasse form different stages of natural fermentation,then,primary screening and secondary screening were performed.[Result] Starch-degrading strains s2g5-1 and s3g4-8 were screened,and they were identified as Bacillus amyloliquefaciens according to their morphological,physiological,biochemical and molecular characteristics.[Conclusion]The research provided theoretical basis for factory application of bagasse.
文摘In the recent decades oil spills in the aquatic environments are one of the major sources of environmental pollutions, which are steadily growing with the increase in oil consumption. Adsorption is a rapid and cost effective process to minimize the environmental impacts of oil spills and cleanup these pollutants. In this work, the crude oil sorption capacity was examined with raw sugarcane bagasse and acetylated sugarcane bagasse. Results show that the acetylated bagasse was significantly more oleophilic than the raw bagasse and acetylation reaction can increase bagasse oil sorption ability by about 90%. The maximum sorption capacities of acetylated bagasse were obtained about 11.3 g and 9.1 g in dry system(crude oil sorption) and oil layer sorption, respectively. The physicochemical characteristics of the sorbents such as composition, water solubility, moisture content and density were measured according to ASTM standard methods. Also Fourier transform infrared spectroscopy(FTIR) of raw and acetylated bagasse was performed to investigate the effect of acetylation on sugarcane bagasse structure.
文摘In this work, a modification of the sugarcane bagasse is performed, in order to obtain organic catalysts. The bagasse analysis is performed using X-ray diffraction (XRD) and Fourier Transformer Infrared Spectroscopy (FTIR), which indicated that characteristic peaks determined its chemical compounds. In addition, Scanning Electron Microscopy (SEM) is used to know the morphology. Finally, a discoloration test is conducted on an azo compound (methylene blue) in an aqueous medium, obtaining an efficiency of 98.6%.
基金Supported by the National Natural Science Foundation of China,China(51674089)Heilongjiang Provincial Science Fund for Distinguished Youth Scholar(JC2018002)+2 种基金Heilongjiang Postdoctoral Scientific Research Development Fund of China(LBH-Q16037)the Youth Fund of Northeast Petroleum University(2018QNL-17)Postgraduate Innovative Research Projects of Northeast Petroleum University(YJSCX2017-014NEPU)
文摘A new approach,named production of aryl oxygen-containing compounds from the catalytic pyrolysis of bagasse lignin(BL) over perovskite oxide,was proposed,A series of LaTixFe1-xO3(LTF-x) samples were prepared by the solid state reaction method.The crystal phase and morphology of LTF-x were characterized by XRD and SEM respectively.Catalytic pyrolysis performance of LTF-x was performed by TG-DTG and the distribution patterns of gaseous,liquid and solid products from BL was investigated using a fixed-bed micro-reactor.The optimal reaction conditions were determined:the pyrolysis temperature was 600℃,the mass ratio of mBL:mLTF-0.2 was 3:1,the veloeity of earrier gas was 100 ml·min-1.The gaseous produets were mainly eomposed of CO2,CO,CH4 and CnHm(n=2-4,m=2 n+2 or m=2 n),The main aryl oxygen-containing compounds in liquid products were phenolics,guaiacols,syringols and phenylates,the rest were benzenes,furans,esters and carboxylic acid.The total contents of aryl oxygencontaining compounds were from 62% up to more than 72% under the action of the perovskite.Moreover,the LTF-0.2 sample had nice regenerability.
基金Project supported by National Natural Science Foundation of China(51674089)Heilongjiang Provincial Science Fund for Distinguished Youth Scholar(JC2018002)+2 种基金Postdoctoral Scientific Research Development Fund of Heilongjiang Province(LBH-Q16037)Postgraduate Innovative Research Project of Northeast Petroleum University(YJSCX2017-014NEPU)Youth Fund of Northeast Petroleum University(2018QNL-17)
文摘To realize the resource and high-value utilization,a new approach,named bagasse lignin(BL) used to produce aryl oxygen-containing compounds by catalytic pyrolysis over perovskite,was proposed,LaTi0.2Fe0.8O3(LTF) samples prepared by the sol-gel method(SG) and the solid-state reaction method(SS)were characterized.The catalytic action on BL pyrolysis was performed by the test of TG-DTG and the evaluation of the fixed bed micro-reactor,the components and contents of the products were determined.The results show that LTF samples have cubic perovskite phase,LTF prepared by SG(LTF-SG) is porous with larger specific surface area than LTF prepared by SS(LTF-SS).During the pyrolysis of BL,the addition of LTF lowers the pyrolysis temperature and the activation energy,the contents of CO2 and CO in gaseous products reduce by 4.6%-8.0% and 30.7%-34.3%,respectively,the total content of aryl oxygencontaining compounds(including phenolics,guaiacols,syringols and phenylates) in liquid products increases from 62 wt% to more than 72 wt%,and LTF-SG shows better catalytic performance.LTF samples have nice phase and catalytic stabilities for BL pyrolysis after five successive redox cycles.
基金Project supported by the National Natural Science Foundation of China(51674089)Heilongjiang Provincial Science Fund for Distinguished Youth Scholar(JC2018002)+1 种基金Postdoctoral Scientific Research Development Fund of Heilongjiang Province(LBH-Q16037)Postgraduate Innovative Research Projects of Northeast Petroleum University(YJSCX2017-014NEPU)
文摘LaTi(0.2)Fe(0.8)O3(LTF)was prepared by the sol-gel method,and the effects of calcination temperature on the structure and properties were investigated,A new method of preparing aryl oxygen-containing compounds from bagasse lignin(BL)by the catalytic pyrolysis over LTF was proposed.The results show that LTF has cubic crystal phase and porous structure and its optimal calcination temperature is 800℃(LTF-800).In the test for catalytic pyrolysis of BL,with the addition of LTF-800,the yield of liquid product reaches the maximum;the contents of phenolics,guaiacols,syringols,phenylates and furans increase obviously,while those of benzenes,esters and carboxylic acid decrease.The total content of aryl oxygencompounds(including phenolics,guaiacols,syringols and phenylates)in liquid product is more than 74 wt%with the addition of LTF-800,larger than that obtained by single BL pyrolysis(62 wt%).LTF could avoid oxygen-containing functional groups from being excessively destroyed.It has nice regeneration performance by controlled combustion of char even after 5 cycles.
文摘The aim of this study was to evaluate the effect of Lactobacillus acidophilus（LAC）, exogenous enzymes of ZAD（exogenous enzyme preparation） or their combination on feed conversion, and dressing of rabbits fed different treatments of sugarcane bagasse（SCB）. Five rations were allotted randomly to five groups of New-Zealand White（NZW） rabbits（n=10） with initial live body weight of（838±42.4） g and 5 weeks of age. Rabbits were fed on diets with different sources of fiber as follows,（i） a control diet composed of 100% berseem hay and 0% SCB,（ii） 50% berseem hay and 50% untreated SCB（USCB）,（iii） 50% berseem hay and 50% SCB treated with L. acidophilus（LAC）,（iv） 50% berseem hay and 50% SCB treated with ZAD（ZAD）, and（v） 50% berseem hay and 50% SCB treated with a combination of LAC＋ZAD（LZ）. Treatments of SCB with L. acidophilus, ZAD and LAC＋ZAD had the highest feed conversion ratio than both USCB and control. The dressing percentage of rabbits that fed the LAC and LZ diets was higher（P〈0.05） compared with that in the other groups. Performance index（PI） for LAC group was improved（P〈0.05） compared to that for the other groups; however, PI for USCB group was the lowest（P〈0.05）. It could be concluded that treating SCB with L. acidophilus, exogenous enzymes of ZAD or their combination improved feed conversion and performance with more positive effects with L. acidophilus than the other treatments.
基金National Science and Technology Council(CONACYT)for the grant No.665811 awarded to his Master thesis。
文摘The reduction behavior and metallization degree of magnetite concentrate with agave bagasse were investigated in an inert atmosphere.The effects of temperature,biomass content,and residence time on reduction experiments and metallization degree were investigated by X-ray diffraction and scanning electron microscopy.Compared with other types of biomass,agave bagasse had lower contents of nitrogen,sulfur,and ash.X-ray diffraction analysis showed that the metallization degree improved with increasing temperature and biomass content.Complete metallization was achieved at 1100℃ for 30 min with 65:35 and 50:50 ratios of the magnetite concentrate to the agave bagasse.These results demonstrate that agave bagasse promotes the efficient metallization of magnetite concentrate without the external addition of a reducing agent.Therefore,this biomass is a technical suitable alternative to replace fossil fuels in steelmaking.
文摘Pyrolysis of bagasse followed by thermal cracking of tar was carded out at atmospheric pressure using a dual bed reactor. The first bed was used for the pyrolysis and the second bed was used for thermal cracking of tar. Iron fillings were used as the packed bed material in the second bed. The effects of reaction time （20 to 40 rain）, reactor temperature （600 to 900 ℃） and packed bed height （40-100 mm） on the product （char, tar and gas） yield and gas （H2, CO, CO2, CH4, CnHm） composition were studied. Over the ranges of the experimental conditions used, the operating conditions were optimized for pyrolysis temperature around 850 ℃, a reaction time of 30 min and packed bed height of 100 mm, thus we could obtain a gas richer in hydrogen and carbon monoxide and poorer in carbon dioxide and hydrocarbons. It was observed that compared with single bed process, dual bed process increased the gas yield from 0.397 to 0.750 m3/kg and decreased the tar yield from 0.445 to 0.268 g/g while the heating value of the product gas remained almost constant （10-11 M J/m3）.
文摘Bagasse fibers were modified using NaOH, KH550, and NaOH/KH550, respectively, and used as reinforcement to prepare bagasse/starch/PVA composite. A combination of Fourier-transform infrared(FTIR) spectroscopy and X-ray diffraction(XRD) was used to investigate the chemical composition. The surface of bagasse fibers and cross-sectional morphologies for bagasse/starch/PVA composite were also characterized by scanning electron microscopy(SEM). Contact angles were measured to test the wettability of the resulting composite. After the chemical treatment with NaOH/KH550, the mechanical properties of the composite can be greatly improved. The contact angle is larger, indicating the variation of surface property from hydrophilicity into hydrophobicity.
文摘Sugarcane bagasse was pyrolyzed using a laboratory fixed bed reactor to produce char and its by-product(pyrolysis liquid).The pyrolysis experiments were carried out using different temperatures(400℃ and 500℃),heating rate(1℃/min and 10℃/min),and holding time(30 min and 60 min).Char was characterized according to its thermal properties,while the pyrolysis liquid was tested for its anti-fungal and anti-termite activities.Pyrolysis temperature and heating rate had a significant influence on the char properties and the yield of char and pyrolysis liquid,where a high-quality char and high yield of pyrolysis liquid can be obtained at a temperature of 500℃ and a heating rate of 10℃/min.The yield of char and pyrolysis liquid was 28.97%and 55.46%,respectively.The principal compounds of pyrolysis liquid were water,acetic acid,glycolaldehyde,1-hydroxy-2-propanone,methanol,formic acid,levoglucosan,furfural,followed by some phenol compounds and guaiacol derivatives.Pyrolysis liquid at a concentration of 0.20%and 0.25%(v/v)caused a 100%inhibition of Coniophora puteana and Trametes versicolor,respectively,when performing inhibition growth tests in Petri dishes.Filter paper treated with 10%of pyrolysis liquid caused 100%of termite mortality,while only 5.65%–7.03%of the treated filter papers consumed by termites at such concentration.Pyrolysis liquid is potentially effective to be used in the formulation of wood protection against fungi and termites.
文摘The effect of Bagasse ash （BAp） particle reinforcement on the wear behavior of Al-Cu- Mg alloy has been studied. Bagasse ash particles were varied from 0 wt pct-10 wt pct with interval of 2 wt pct. Unlubricated pin-on disc tests were conducted to examine the wear behaviour of the aluminium alloy/Bagasse ash particulate composites. The tests were conducted at varying loads, from 5 to 20 N and sliding speeds of 1.26 m/s, 2.51 m/s, 3.77 m/s and 5.02 m/s for a constant sliding distance of 5000 m. The results showed that the wear rates of the A1-Cu-Mg/BAp composites are lower than that of the matrix alloy and further decrease with increasing Bagasse ash content. Wear rate increases as the sliding speed and applied load increase. The microstructure of the worn surface revealed that a large amount of plastic deformation appeared on the surface of the unreinforced alloy. While Bagasse ash reinforced Al-Cu-Mg alloy showed worn out surface that is not smooth, and grooves, scratches and parallel lines were observed. A combination of adhesion and delamination wear was in operation. These results show that improve wear properties is achievable for the aluminium alloy by the addition of Bagasse ash particles as reinforcement material.
基金Supported by the Natural Science Foundation of Jilin Province (No. 990337).
文摘Bagasse fly ash was converted into an inexpensive adsorbent andutilized for the removal of β- naphthalenesulfonic acid in dilutesolution. The effect of pH, temperature, adsorbent concentration, andco-existed acids on the removal of β-naphthalenesulfonic acid wasexamined. The adsorption data have been correlated with both Langmuirand Freundlich adsorption models. Thermodynamic parameters obtainedindicate the feasibility of the process, and kinetic studies providedthe necessary mechanistic information of the removal process.
