期刊
RENEWABLE ENERGY
卷 124, 期 -, 页码 144-154出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2017.06.076
关键词
Biodiesel; Supercritical transesterification; Optimisation; Response surface methodology; Kinetic reactor; HYSYS simulation
资金
- British Council UK
- STDF Egypt through the Fund Programme Newton-Mosharafa [261862377, 27738]
- The British Council [261862377] Funding Source: researchfish
Biodiesel production using supercritical methanol in the absence of catalyst has been analysed by studying the main factors affecting biodiesel yield. A quadratic polynomial model has been developed using Response Surface Methodology (RSM). Box-Behnken Design (BBD) has been used to evaluate the influence of four independent variables i.e. methanol to oil (M:O) molar ratio, temperature, pressure and time on biodiesel yield. The optimum biodiesel yield is 91% at M:O molar ratio, temperature, pressure and reaction time of 37:1, 253.5 degrees C, 198.5 bar and 14.8 min, respectively. Overall reaction kinetics has been studied at optimum conditions concluding a pseudo first order reaction with reaction rate constant of 0.0006s-1. Moreover, thermodynamics of the reaction has been analysed in the temperature range between 240 and 280 degrees C concluding frequency factor and activation energy of 4.05s(-1) and 50.5 kj/mol, respectively. A kinetic reactor has been simulated on HYSYS using the obtained kinetic data resulting in 91.7% conversion of triglycerides (TG) with 0.2% relative error from the experimental results. (C) 2017 Elsevier Ltd. All rights reserved.
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