Production of diesel fuel by simultaneous rapeseed oil extraction and interesterification in diesel fuel media

Abstract

<p>The purpose of the research was to evaluate the process of enzymatic biodiesel synthesis by applying the simultaneous oil extraction from rapeseed and interesterification with methyl formate in mixture with mineral diesel, choosing the amount of mineral diesel so that the ratio between it and the rapeseed oil in the seeds was 9:1. As the final product of the interesterification process, a mixture of mineral diesel and biodiesel was obtained directly. The interesterification tests were performed using enzymatic catalysis - the lipase Lipozyme TL TIM. Process optimization was performed using the response surface methodology. A model describing the interaction of three independent variables and their influence on the yield of rapeseed oil methyl esters was developed. The optimal conditions have been determined. A 73% yield of rapeseed oil methyl esters was obtained at a 6:1 ratio of methyl formate to rapeseed mass, with the process running for 70 h and using 23% of the enzyme preparation Lipozyme TL IM (based on oil content). The physical and chemical indicators of the product obtained under optimal interesterification conditions were evaluated</p>