Study on enzyme inhibition in biodiesel synthesis: effect of stepwise addition of methanol and removal of glycerol

Abstract

Enzymatic transesterification is known as the most favourable and suitable method for biodiesel synthesis from vegetable oil or animal fat. Deactivation of enzyme during biodiesel synthesis remains a large barrier. Stepwise addition of alcohol and removal of glycerol (continuous or stepwise) have been adopted for minimizing the inhibition. In this article, a mathematical model is derived and inhibition of enzyme has been studied in biodiesel synthesis from Jatropha curcas oil. Sensitivity analysis of the model parameters has also been carried out to determine the most sensitive parameters which have a major role in the system functioning. Simulation results provide the validity of the proposed model. It has been shown that the proposed method minimizes the deactivation and enables enzyme reuse.

Keywords

Transesterification / Enzyme inhibition / Mathematical model / Impulsive differential equation / Sensitivity analysis

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Funding

University Grants Commission(MA/16-17/0029)

Indo-Russian Joint Research Project(INT/RUS/RFBR/306)