Biodiesel production from waste cooking oil via supercritical methanol:Optimisation and reactor simulation

Aboelazayem, Omar and Gadalla, Mamdouh and Saha, Basudeb (2018) Biodiesel production from waste cooking oil via supercritical methanol:Optimisation and reactor simulation. Renewable Energy, 124. pp. 144-154. ISSN 0960-1481

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Abstract

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, 253.5oC, 198.5 bar and 14.8 minutes, respectively. Overall reaction kinetics has been studied at optimum conditions concluding a pseudo first order reaction with reaction rate constant of 0.0006 s-1. Moreover, thermodynamics of the reaction has been analysed in the temperature range between 240 and 280oC concluding frequency factor and activation energy of 4.05 s-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.

Item Type:
Journal Article
Journal or Publication Title:
Renewable Energy
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2100/2105
Subjects:
ID Code:
163031
Deposited By:
Deposited On:
06 Dec 2021 13:50
Refereed?:
Yes
Published?:
Published
Last Modified:
05 Apr 2022 02:01