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Synthesis of PDMS-PS IPN Pervaporation Membrane for Pervaporation Recovery of butanol

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Journal of Wuhan University of Technology(Materials Science) 2018年第6期33卷 1308-1314页

作者： YU Weil HU Minnie College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072China Hubei Military-Civilian Integration and Co-Innovation Center of Aerospace Power and Materials Technology Wuhan 430072China Luzhou North Chemical Industres Co. LtdLuzhou 646003China School of Printing and Packaging Wuhan UniversityWuhan 430072China

Polydimethylsiloxane(PDMS)-polystyrene(PS) interpenetrating polymer network(IPN) was prepared and characterized by FTIR, TGA, WCA, swelling experiments, and SEM. The IPN was used for pervaporation(PV) recovery of butanol. Both the permeation flux and separation factor increased with feed temperature, and both water and butanol fluxes increased with feed concentration, while no obvious effect of concentration on separation factor was found. Through the formation of IPN structure, the total flux of PDMS-PS IPN pervaporation membrane increased greatly with the decrease of separation factor. At the feed temperature of 60 °C, the IPN membrane obtained a total flux of 920.3 g/m2h with a separation factor of 9.5.

关键词： butanol interpenetrating polymer network PDMS PS

Biosynthesis of Unsaturated Fatty Acids via Mortierella Isabellina Cultivated in a Medium Containing butanol

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Chemical Research in Chinese Universities 2002年第3期18卷 303-306页

作者： XIAN Mo YAN Ji chang CHENG Tie xin KANG Yi jian LI Wen xing BI Ying li ZHEN Kai ji College of Chemistry Jilin UniversityChangchun 130023P.R.China College of Chemistry Northeast Normal UniversityChangchun 130024P.R.China Department of Chemical Engineering Qingdao Chimical Industry InstituteQingdao 266042P.R.China

Mortierella isabellina was found to accumulate large amounts of unsaturated fatty acids when it was grown in a medium containing butanol(5 g/L) and yeast extract(10 g/L) and cultivated at 25 ℃ for 5 d during which additional feeding butanol of 2 g/L was fed after being cultivated for 48 h . The resultant mycelial lipids accounted for 40 1% of the dry mycelia, while about 34% of butanol in the medium was converted. The mycelial lipids contained four kinds of unsaturated fatty acids, i.e ., palmitoleic(4 9%), oleic(54 1%), linoleic(10 4%) and linolenic(5 4%) acids. Those accounted for 74 8% of the total fatty acids. The effects of the culture conditions, such as cultivation temperature, initial pH of the medium and additional feeding butanol in the course of cultivation, on the production of mycelial lipids by M. isabellina were studied.

关键词： Mortierella isabellina butanol Unsaturated fatty acid Biosynthesis

High butanol production by regulating carbon, redox and energy in Clostridia

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Frontiers of Chemical Science and Engineering 2015年第3期9卷 317-323页

作者： Jianfa Ou Chao Ma Ningning Xu Yinming Du Xiaoguang (Margaret) Liu Department of Chemical and Biological Engineering The University of Alabama Tuscaloosa AL 35401 USA Department of Chemical and Biomolecular Engineering The Ohio State University Columbus OH 43210 USA

butanol is a promising biofuel with high energy intensity and can be used as gasoline substitute. It can be produced as a sustainable energy by microorganisms （such as Clostridia） from low-value biomass. However, the low productivity, yield and selectivity in butanol fermentation are still big challenges due to the lack of an efficient butanol-producing host strain. In this article, we systematically review the host cell engineering of Clostridia, focusing on （1） various strategies to rebalance metabolic flux to achieve a high butanol production by regulating the metabolism of carbon, redox or energy, （2） the challenges in pathway manipulation, and （3） the application of proteomics technology to understand the intracellular metabolism. In addition, the process engineer- ing is also briefly described. The objective of this review is to summarize the previous research achievements in the metabolic engineering of Clostridium and provide guidance for future novel strain construction to effectively produce butanol.

关键词： Clostridia butanol biofuel metabolism carbon redox energy

Synthesis of HTPB based PU-PS IPN Membrane for Pervaporation Recovery of butanol

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Journal of Wuhan University of Technology(Materials Science) 2017年第6期32卷 1280-1286页

作者：张凯 LI Li YU Wei HU Mingjie ZHOU Yongyan FAN Xiaopeng 廖俊黄驰 Electric Power Research Institute of Guangdong Power Grid Company Ltd. College of Chemistry and Molecular Sciences Wuhan University School of Printing and Packaging Wuhan University Wuhan University Asset Investment & Management Co. Ltd.

Hydroxyl terminated polybutadiene（HTPB） based polyurethane（PU）-polystyrene（PS） interpenetrating polymer network（IPN） was prepared and characterized by FTIR, TGA, WCA, swelling experiments, and SEM. The IPN was used for pervaporation（PV） recovery of butanol. Both the permeation flux and separation factor increased with feed temperature, and both water and butanol fluxes increased with feed concentration while no obvious effect of concentration on separation factor was found. Through the formation of IPN structure, the total flux of HTPB based PU increased greatly with the decrease of separation factor. At the feed temperature of 60 °C, the IPN membrane obtained a total flux of 613.3 g/m^2 h with a separation factor of 6.15.

关键词： interpenetrating polymer network pervaporation butanol

A numerical investigation into the effect of altering compression ratio, injection timing, and injection duration on the performance of a diesel engine fuelled with diesel-biodiesel-butanol blend

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Clean Energy 2024年第5期8卷 73-96页

作者： Abdulkarim Youssef Amr Ibrahim Mechanical Engineering Department Beirut Arab University115020 BeirutLebanon Mechanical Engineering Department Alexandria UniversityAlex 21544Egypt

Using renewable fuels for diesel engines can reduce both air pollution and dependence on fossil fuels.A computer simulation was constructed to predict the performance,combustion characteristics,and NOx emissions of a diesel engine fuelled with diesel-biodiesel-butanol *** simulation was validated by comparing the modelling results against experimental data and a good agreement between the results was *** fuels used for the validation were diesel(B0),biodiesel(B100),diesel-biodiesel blend(B50),and two diesel-biodiesel-butanol blends with 45%diesel-45%biodiesel-10%butanol(Bu10)and 40%diesel-40%biodiesel-20%butanol(Bu20)by *** results showed that the addition of butanol reduced NOx emissions but deteriorated the engine *** aim of the current work was the numerical optimization of the different parameters to enhance the engine performance while using butanol to decrease NOx *** engine compression ratio(CR)varied from 14 to 24,in increments of *** injection timing(IT)was reduced from 30°before top dead centre(bTDC)to 5°bTDC in increments of 5°.Also,the fuel injection duration(IDur)was extended from 20°to 50°in increments of 10°.Results showed that the increase in the CR improved engine performance for the two investigated fuels,Bu10 and *** maximum engine brake power(BP),thermal efficiency(BTE),and minimum brake-specific fuel consumption(BSFC)of 1.46 kW,32.3%,and 0.273 kg/kWh respectively,were obtained when the Bu10 fuel was injected under the optimum conditions of 24 CR,15°bTDC IT,and 40°*** these optimum conditions,the BP,BTE,and BSFC improved by 3%-3.5%for Bu10 and Bu20 fuel blends compared with the base engine conditions of a CR of 22,30°IDur,and 10°bTDC *** heat release rate during the premixed phase increased when the IT was advanced,while the mixing-controlled combustion phase was enhanced when the IT was *** emissions increased with increasing CR,while both an increase in IDur at con

关键词： compression ratio injection timing injection duration butanol biodiesel diesel

Pervaporation Recovery of n-butanol from Its Dilute Solution with Natural Rubber/Styrene-butadiene-styrene Blend Membrane

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Journal of Wuhan University of Technology(Materials Science) 2022年第4期37卷 746-752页

作者： SUN Li YU Bo YU Wei TANG Xiaolin HU Mingjie HUANG Chi College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072China Hubei Military-Civilian Integration and Co-Innovation Center of Aerospace Power and Materials Technology Wuhan 430072China

Natural rubber/styrene-butadiene-styrene(NR/SBS)membrane was prepared by solution blend,and then used for recovery of butanol from its dilute solution by pervaporation(PV).The thermodynamic and mechanical properties of NR/SBS blend membrane were characterized by TGA and tensile test,respectively.A layer of relatively dense blend membrane with the thickness of about 37μm was closely cast on a layer of porous polyvinylidene difluoride(PVDF)*** there was no obvious phase separation observed between the interface of two *** flux and separation factor increased with increasing feed *** flux increased as feed concentration increased *** blend membrane which got the best performance obtained membrane separation factor of 28.8 with total flux of 2695.2 g/m^(2)h at 70℃ when feed concentration was 4.00wt%.

关键词： natural rubber styrene-butadiene-styrene butanol pervaporation

Experimental assessment of performance and exhaust emission characteristics of a diesel engine fuelled with Punnai biodiesel/butanol fuel blends

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Petroleum Science 2019年第6期16卷 1471-1478页

作者： Yuvarajan Devarajan Dineshbabu Munuswamy Beemkumar Nagappan Ganesan Subbiah Department of Mechanical Engineering Madanapalle Institute of Technology&ScienceMadanapalleIndia Department of Mechanical Engineering Panimalar Engineering CollegeChennaiIndia Department of Mechanical Engineering Jain UniversitySchool of Engineering and TechnologyBangaloreIndia Department of Mechanical Engineering Sathyabama Institute of Science and TechnologyChennaiIndia

This work examines the effect of butanol as an oxygenated additive to lower carbon monoxide,smoke,nitrogen oxide and hydrocarbon emissions and to improve the performance aspects of Calophyllum inophyllum(Punnai)***,oil-cooled compression ignition engines are employed in this *** Punnai biodiesel(P100)is blended with butanol at 10%and 20%by volume and labelled as B10 P90 and B20 P80,*** and alkaline catalyst(KOH)were used for the transesterification process for biodiesel *** transesterification technique yielded 88%biodiesel from raw Punnai *** tests resulted in lower CO,smoke,NO_x and HC emissions when fuelled with both butanol blends when compared to *** addition,BSFC(brake-specific fuel consumption)reduced and BTE(brake thermal effciency)increased with the inclusion of butanol blends(B10 and B20)to neat Punnai biodiesel.

关键词： butanol Punnai biodiesel Nitrogen oxide Carbon dioxide Engine

Renewable hydrogen production from butanol:a review

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Clean Energy 2017年第1期1卷 90-101页

作者： Ronak Patel Sanjay Patel Chemical Engineering Department Institute of TechnologyNirma UniversityAhmedabadGujarat 382481India Chemical Engineering Department L.D.College of EngineeringAhmedabadGujarat 380015India

Hydrogen production from butanol is a promising alternative when it is obtained from bio-butanol or bio-oil due to the higher hydrogen content compared to other oxygenates such as methanol,ethanol or *** and operating conditions play a crucial role in hydrogen *** and Rh are metals mainly used for butanol steam reforming,oxidative steam reforming and partial *** such as Cu can improve catalytic activity in many ***,support-metal interaction and catalyst preparation technique also play a decisive role in the stability and hydrogen production capacity of *** reforming technique as an option is more frequently researched due to higher hydrogen production capability in comparison to other thermochemical techniques despite its endothermic *** use of the oxidative steam reforming and partial oxidation has the advantages of requiring less energy and longer stability of ***,the hydrogen yield is *** article brings together and examines the latest research on hydrogen production from butanol via steam reforming,oxidative steam reforming and partial oxidation *** addition,the review examines a few thermodynamic studies based on sorption-enhanced steam reforming and dry reforming where there is potential for hydrogen extraction.

关键词： butanol hydrogen production steam reforming oxidative steam reforming partial oxidation

Antimalarial activities of butanol and ethylacetate fractions of Combretum nigricans leaf

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Asian Pacific Journal of Tropical Biomedicine 2019年第4期9卷 176-180页

作者： Enegide Chinedu Peter A.Akah Dabum L.Jacob Ifeoma A.Onah Chimere Y.Ukegbu Chukwuma K.Chukwuemeka Department of Pharmacology & Toxicology Faculty of Pharmaceutical Sciences University of Nigeria Department of Human Physiology Faculty of Medical Sciences University of Jos Department of Pharmaceutical Microbiology & Biotechnology Faculty of Pharmaceutical Sciences University of Nigeria Department of Biochemistry Faculty of Biological Sciences University of Nigeria Department of Plant Science & Biotechnology Faculty of Biological Sciences University of Nigeria

Objective: To evaluate the antimalarial activity of the ethylacetate and butanol fractions of Combretum nigricans(C. nigricans) leaf extract in mice. Methods: C. nigricans solvent(butanol and ethylacetate) fractions were screened for their phytochemical constituents using standard procedures illustrated by Harborne and Evans. The Peters' 4-day suppressive test against early malaria infection, Rane's curative test against established malaria and prophylactic test for residual activity were employed for evaluating the antimalarial potential in mice. Results: The phytochemical screening revealed the presence of alkaloids, terpenoids, saponins, and flavonoids in both fractions at different intensity. Both fractions exhibited significant antimalarial activity in all test models(Pbutanol fraction, which however, elicited a better chemoprophylactic effect. The chemosuppressive effect of C. nigricans ethylacetate fraction(200-800 mg/kg) was 77.6%, 69.1% and 86.1%; curative effect was 62.3%, 71.3% and 72.4%; while the chemoprophylactic activity was 32.1%, 48.6% and 61.2% respectively. C. nigricans butanol fraction(200-800 mg/kg) had 40.3%, 54.1% and 69.1% chemosuppression; 26.2%, 36.9% and 34.5% curative effect; and 48.4%, 70.0% and 87.4% chemoprophylaxis. Conclusions: Both solvent fractions of C. nigricans possess antimalarial activity, and may be useful at different stages of malaria therapy.

关键词： Antimalarial Combretum nigricans butanol fraction Ethylacetate fraction In vivo