Sustainable Diesel from Rapeseed Oil Esters by Sequential Semi-Hydrogenation, Double Bond Isomerization, and Metathesis.

ABSTRACT: Rapeseed oil methyl esters (RME) have been converted to biofuel with a boiling point curve that fulfills the EN 590 specifications for modern diesel engines using a robust, three-step process. In the first step, the polyunsaturated esters of the RME were semi-hydrogenated in the presence of 20 ppm of a solvent-stabilized Pd⁰ colloid. The resulting mono-unsaturated fatty esters were further converted into a defined mixture of double-bond isomers by passing them over inexpensive, Brønsted-acidic Amberlyst 15 resin at high space-time yields (1.3 kg⋅L^-1⋅h^-1). The resulting mixture was then converted into a blend of terminally unsaturated olefins and monoesters, with <4.9 % diesters and <21 % saturated fatty esters by cross-metathesis with technical-grade ethyle

SUBMITTER: Kondratiuk M 

PROVIDER: S-EPMC12015397 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature