2008•Journal of Qingdao University of Science and TechnologyRequires access
Preparing Biodiesel from Acidified Soybean Oil
Shuguang Xiang
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Abstract
Biodiesel was prepared by esterification of acidified soybean oil with methanol,using H2SO4 as catalyst.The effects of methanol/oil mole ratio,catalyst dosage,reaction time,and temperature on the yield were studied.The optimal reaction conditions were obtained by orthogonal experiment: methanol/oil mole ratio 16∶1,catalyst dosage 2%,reaction time 8 h,reaction temperature 70 ℃.Under the optimum conditions,the acid value of biodiesel was decreased from 128 to 5.6,esterification rate reached 95.6%,and the yield rate of biodiesel was 68.0%.