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朴敬文,金錫中 홍익대학교 산업기술연구소 2006 産業技術 Vol.16 No.-
The biocatalytic conversion of vegetable seed oil into biodiesel, monoalkyl fatty acid ester, was studied. Biodiesel is an alternative biodegradable diesel fuel to petroleum-based diesel fuel. Recently, biodiesel has drawn attractions in many developed countries because of its low environmental burdens and high crude oil price. For biodiesel production, renewable feedstocks such as vegetable seed oil is used as starting material through transesterfication reaction of triglycerides in oil with short chain alcohol such as methanol. In this work, we investigated the effects of molar ratio of methanol to soybean oil on conversion rate of vegetable oil into monoalkyl fatty acid ester. As the molar ratio of methanol was increased from 1:1 to 1:3, the conversion was decreased dramatically, likely caused by the inhibition of lipase activity owing to excess methanol. In addition, different acyl acceptors constituting a single phase with vegetable seed oil, such as methyl acetate and ethyl acetate, were exploited at a molar ratio soybean oil/acyl acceptor of 1:3 to increase conversion and to study the feasibility of mass production of biodiesel using immobilized lipase repeatedly.