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Development of a combined approach for improvement and optimization of karanja biodiesel using response

Sunil DHINGRA, Gian BHUSHAN, Kashyap Kumar DUBEY

Frontiers in Energy 2013, Volume 7, Issue 4,   Pages 495-505 doi: 10.1007/s11708-013-0267-5

Abstract: The optimum combination of reaction variables were analyzed for maximizing the biodiesel yield.The yield obtained by the RSM was 65% whereas the predicted value was 70%.The yield produced was closer to the predicted value of 94.2093%.Hence, 25% of the improvement in the biodiesel yield was reported.Testing & Materials (ASTM) standard of biodiesel.

Keywords： optimization of karanja biodiesel     genetic algorithm (GA)     response surface methodology (RSM)     percentageimprovement in the biodiesel yield     properties of biodiesel    

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Improvement in growth yield of single-walled carbon nanotubes with narrow chirality distribution by pulse

Bin Xu, Toshiro Kaneko, Toshiaki Kato

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 3,   Pages 485-492 doi: 10.1007/s11705-019-1831-2

Abstract: A pulse plasma chemical vapor deposition (CVD) technique was developed for improving the growth yieldThe growth yield of the SWNTs could be improved by repetitive short duration pulse plasma CVD, while

Keywords： single-walled carbon nanotubes     chirality-controlled synthesis     pulse plasma chemical vapor deposition    

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ALKALINE PRETREATMENT AND AIR MIXING FOR IMPROVEMENT OF METHANE PRODUCTION FROM ANAEROBIC CO-DIGESTION

Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 3,   Pages 424-436 doi: 10.15302/J-FASE-2023506

Abstract:

● Integration of alkaline pretreatment and air mixing for co-digestion was validated.

Keywords： sodium hydroxide     air injection     cumulative methane yield     kinetic modeling analysis     digestate    

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Metakaolinite as a catalyst for biodiesel production from waste cooking oil

Jorge RAMIREZ-ORTIZ, Merced MARTINEZ, Horacio FLORES

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 4,   Pages 403-409 doi: 10.1007/s11705-012-1224-2

Abstract: transesterification reaction of waste cooking oil with methanol to obtain fatty acid methyl esters (biodieselThe transesterification reaction produced biodiesel in a maximum yield of 95% under the following conditionsThe biodiesel thus obtained exhibited a viscosity of 5.4?mm ?s and a density of 900.1 kg?m .

Keywords： biodiesel     metakaolinite     transesterification     waste cooking oil    

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Sulfonic acid-functionalized mesoporous silica catalyst with different morphology for biodiesel production

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 8,   Pages 1198-1210 doi: 10.1007/s11705-021-2133-z

Abstract: mesoporous silica catalysts of spherical shape and the cube shape were assessed for catalytic activity in biodieselThe catalytic biodiesel production reaction over the catalysts were studied by esterification of freeThe present catalysts exhibit superior performance in biodiesel production and it can be used for theseveral biodiesel feedstock’s that are rich in free fatty acids.

Keywords： solid acid catalyst     mesoporous silica     sulfonic acid     biodiesel     esterification     oleic acid    

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Application of heterogeneous catalysis to biodiesel synthesis using microalgae oil

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 5, doi: 10.1007/s11783-020-1343-9

Abstract:

• Microalgae oil application for biodiesel synthesis is discussed.

Keywords： Biodiesel     Heterogeneous catalysis     Transesterification     Microalgae oil    

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Simulation analysis of methanol flash distillation circulation process in biodiesel production with supercritical

Zhengjiao TANG, Cunwen WANG, Weiguo WANG, Jia GUO, Yuanxin WU, Jinfang CHEN, Yigang DING

Frontiers in Energy 2011, Volume 5, Issue 1,   Pages 93-97 doi: 10.1007/s11708-010-0028-7

Abstract: High methanol-to-oil ratio is required to obtain a high conversion of oil for the production of biodieselThe difference of the recovery percentage of methanol of the above two flash processes is less than 0.5%effect of cooling temperature, feed pressure and flash pressure on methanol concentration and recovery percentageMPa, the flash pressure equals 0.4 MPa, and cooling temperature range is 240°C–250°C, the recovery percentage

Keywords： supercritical methanol     biodiesel     recovery     flash distillation    

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Challenge of biodiesel production from sewage sludge catalyzed by KOH, KOH/activated carbon, and KOH/

Xuemin Wu,Fenfen Zhu,Juanjuan Qi,Luyao Zhao,Fawei Yan,Chenghui Li

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 2, doi: 10.1007/s11783-017-0913-y

Abstract: KOH/activated carbon was a better catalyst for biodiesel production.abundance, and low costs involved has led to the proposal to use sewage sludge as raw material for biodieselMany conditions have been tested to increase biodiesel yield through single-factor tests, including massHowever, the three catalysts did not work better than H SO , which had a maximum yield of 4.6% (dry sewage

Keywords： Biodiesel     Sewage sludge     Base catalyst     In situ transesterification    

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Transesterification of soybean oil to biodiesel over kalsilite catalyst

Guang WEN, Zifeng YAN

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 3,   Pages 325-329 doi: 10.1007/s11705-010-0574-x

Abstract: A biodiesel yield of 54.4% and a kinematic viscosity of 7.06 cSt were obtained at a high reaction temperatureA biodiesel yield of 100% and a kinematic viscosity of 3.84 cSt were achieved at a temperature of onlylaboratory-scale fixed-bed reactor showed that it maintained a stable catalytic performance with a biodieselyield of 100% over the first 90 min.

Keywords： kalsilite     heterogeneous catalyst     transesterification     biodiesel    

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Calculation and analysis of sub/supercritical methanol preheating tube for continuous production of biodiesel

Wen CHEN, Weiyong YING, Cunwen WANG, Weiguo WANG, Yuanxin WU, Junfeng ZHANG,

Frontiers in Energy 2009, Volume 3, Issue 4,   Pages 423-431 doi: 10.1007/s11708-009-0075-0

Abstract: Biodiesel is an important renewable energy.Supercritical methanol transesterification for biodiesel has recently been concerned because of its obviousThe tubular reactor is an ideal reactor for continuous preparation of biodiesel via supercritical methanol

Keywords： sub/supercritical methanol     preheating tube     integration method     biodiesel    

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Optimization of pretreatment of Jatropha oil with high free fatty acids for biodiesel production

Supriyono SUWITO, Giuliano DRAGONE, Hary SULISTYO, Bardi MURACHMAN, Suryo PURWONO, José TEIXEIRA

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 2,   Pages 210-215 doi: 10.1007/s11705-012-1282-5

Abstract: A central composite rotatable design and response surface methodology were used in order to investigate the individual and combined effects of the ethanol-to-oil ratio, H SO concentration, temperature and time of reaction on the reduction of free fatty acid (FFA) in jatropha oil. A quadratic polynomial model relating the reaction variables with FFA reduction was developed, presenting a good coefficient of determination ( = 0.893). For reducing FFA to less than 1%, the optimal combination was found to be 0.62 v·v ethanol-to-oil ratio (14.9 v·v ethanol-to-FFA ratio), 1.7% v·v H SO concentration, and 79 min reaction time at a reaction temperature of 54°C. These results are of great relevance to maximize methyl esters formation by transesterification using an alkaline catalyst.

Keywords： biodiesel     biofuel     esterification     free fatty acids     jatropha curcas oil    

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PLANT DENSITY, IRRIGATION AND NITROGEN MANAGEMENT: THREE MAJOR PRACTICES IN CLOSING YIELD GAPS FOR AGRICULTURAL

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 4, doi: 10.15302/J-FASE -2020355

Abstract: Here, we investigate current maize production at the field scale, analyze the yield gaps and impactingfactors, and recommend measures for sustainably closing yield gaps.The relative yield reached 70% in both years.Yield variability under drip irrigation was 12.1%, lower than the 18.8% under border irrigation.the yield-limiting factors.

Keywords： boundary line analysis     irrigation method     precision agriculture     spatial variability     yield gaps     yield-limiting factors    

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Numerical simulation of biodiesel fuel combustion and emission characteristics in a direct injection

Yi REN, Ehab ABU-RAMADAN, Xianguo LI,

Frontiers in Energy 2010, Volume 4, Issue 2,   Pages 252-261 doi: 10.1007/s11708-010-0036-7

Abstract: The effect of the physical and chemical properties of biodiesel fuels on the combustion process and pollutantsIn the current study, methyl butanoate (MB) and -heptane are used as the surrogates for the biodieselIt is shown that the differences in the chemical properties between the biodiesel fuel and the dieselWhile the variations of both the chemical and the physical properties between the biodiesel and diesel

Keywords： biodiesel     diesel engine     CFD simulation     combustion     pollutant formation    

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Exploring differentiated improvement strategies of cultivated land quality in China

Frontiers of Agricultural Science and Engineering doi: 10.15302/J-FASE-2023523

Abstract:

● Cultivated land quality can be considered in four dimensions: suitability, contiguity, resistance, and ecological stress.

Keywords： China     cultivated land quality     differentiated improvement     food security    

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Influence of cetane number improver on performance and emissions of a common-rail diesel engine fueled with biodiesel-methanol

Wu YU, Gen CHEN, Zuohua HUANG

Frontiers in Energy 2011, Volume 5, Issue 4,   Pages 412-418 doi: 10.1007/s11708-011-0163-9

Abstract: number concentration and size distribution, of a turbocharged, common-rail diesel engine fueled with biodiesel-methanolTwo volume fractions (0.3% and 0.6%) of CN improver were added to BM30 (30% of methanol in the biodiesel-methanolThe results show that, compared with those of biodiesel-methanol blend, the peak value of cylinder pressureare advanced, and the fuel economy and thermal efficiency are improved when CN improver is added to biodiesel-methanol

Keywords： biodiesel     methanol     common-rail (CR) diesel engine     cetane number (CN) improver    

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Title Author Date Type Operation

Development of a combined approach for improvement and optimization of karanja biodiesel using response

Sunil DHINGRA, Gian BHUSHAN, Kashyap Kumar DUBEY

Journal Article

Improvement in growth yield of single-walled carbon nanotubes with narrow chirality distribution by pulse

Bin Xu, Toshiro Kaneko, Toshiaki Kato

Journal Article

ALKALINE PRETREATMENT AND AIR MIXING FOR IMPROVEMENT OF METHANE PRODUCTION FROM ANAEROBIC CO-DIGESTION

Journal Article

Metakaolinite as a catalyst for biodiesel production from waste cooking oil

Jorge RAMIREZ-ORTIZ, Merced MARTINEZ, Horacio FLORES

Journal Article

Sulfonic acid-functionalized mesoporous silica catalyst with different morphology for biodiesel production

Journal Article

Application of heterogeneous catalysis to biodiesel synthesis using microalgae oil

Journal Article

Simulation analysis of methanol flash distillation circulation process in biodiesel production with supercritical

Zhengjiao TANG, Cunwen WANG, Weiguo WANG, Jia GUO, Yuanxin WU, Jinfang CHEN, Yigang DING

Journal Article

Challenge of biodiesel production from sewage sludge catalyzed by KOH, KOH/activated carbon, and KOH/

Xuemin Wu,Fenfen Zhu,Juanjuan Qi,Luyao Zhao,Fawei Yan,Chenghui Li

Journal Article

Transesterification of soybean oil to biodiesel over kalsilite catalyst

Guang WEN, Zifeng YAN

Journal Article

Calculation and analysis of sub/supercritical methanol preheating tube for continuous production of biodiesel

Wen CHEN, Weiyong YING, Cunwen WANG, Weiguo WANG, Yuanxin WU, Junfeng ZHANG,

Journal Article

Optimization of pretreatment of Jatropha oil with high free fatty acids for biodiesel production

Supriyono SUWITO, Giuliano DRAGONE, Hary SULISTYO, Bardi MURACHMAN, Suryo PURWONO, José TEIXEIRA

Journal Article

PLANT DENSITY, IRRIGATION AND NITROGEN MANAGEMENT: THREE MAJOR PRACTICES IN CLOSING YIELD GAPS FOR AGRICULTURAL

Journal Article

Numerical simulation of biodiesel fuel combustion and emission characteristics in a direct injection

Yi REN, Ehab ABU-RAMADAN, Xianguo LI,

Journal Article

Exploring differentiated improvement strategies of cultivated land quality in China

Journal Article

Influence of cetane number improver on performance and emissions of a common-rail diesel engine fueled with biodiesel-methanol

Wu YU, Gen CHEN, Zuohua HUANG

Journal Article