求一篇关于生物柴油的英文文章

【专家解说】：The method and process of making biodiesel by transesterification and the study of optimum condition for making the highest yield of biodiesel are introduced. Biodiesel,used as a kind of environmentally friendly and renewable energy has quickly developed in recent years. The most commonly used method for preparation of biodiesel is transesterification of vegetable oils and animal fats via homogeneous base or acid catalysts. In order to improve the lipase activity of the Rhizopus oryzae strain which is used for producing biodiesel fuel,ultraviolet mutation is employed in this research. The biodiesel fuel is a green renewable energy resource. The characteristic of soapstock were described,its application in producing phosphatide,biodiesel fuel,fatty acid and so on were also discussed. At present,countries around the world are setting off bio-diesel development and utilization. The condition factors in ethanolysis reaction,namely the reaction of rapeseed oil with ethanol catalyzed by lipase LVK,to produce bio-diesel were investigated,and the factors included molar ratio of ethanol to oil,catalyst dosage,reaction temperature,reaction time,and so on;the effect of organic solvent and the procedure of ethanol addition were also investigated. This article introduces the process and the technique of producting bio-diesel by trans-esterification.