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论文类型：期刊论文

发表时间：2014-01-01

发表刊物：GREEN CHEMISTRY

收录刊物：SCIE

卷号：16

期号：6

页面范围：3218-3223

ISSN号：1463-9262

摘要：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.