Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2014-01-01

Journal: GREEN CHEMISTRY

Included Journals: SCIE

Volume: 16

Issue: 6

Page Number: 3218-3223

ISSN: 1463-9262

Abstract: The production of biodiesel from soybean oil and ethanol was investigated in switchable-polarity solvent (SPS) media of DBU and ethanol. The highest biodiesel yield catalyzed by DBU could reach 97.9% under optimized conditions, i.e. ethanol-oil molar ratio: 12 : 1, DBU-oil molar ratio: 2 : 1, reaction temperature: 70 degrees C, reaction time: 2 h. According to the kinetic analysis, the reaction order of oil was estimated to be 0.7, the apparent activation energy was 16.763 kJ mol(-1), the pre-exponential factor was 561.31 mol(0.3) mL(-0.3) min(-1) using the Arrhenius equation for the first time, which explains the high efficiency of the DBU catalyst. The DBU-catalyzed transesterification in the DBU-ethanol switchable-polarity solvent offered an interesting alternative, which would be used to simplify the transesterification and separation to a single step.