Research On Biodiesel Produced By Soybean Vegetable Oil

At the present time, the global fuel deficiency and environmental degradation are concerned more and more seriously and it's become a severe problem for mankind have to face to protect our nature and to develop alternate fuel. Biodiesel fuel,which is also called liquid solar energy, is made from reproducible oil, such as rape oil, soybean oil, waste oil from restaurants, and etc. Biodiesel fuel is a kind of substitute for diesel fuel with good quality, as well as is friendly to environment. The application of biodiesel fuel has great economic and social benefits.Transforming the vegetable oil to the substitute fuel replacing the fossil diesel has a good perspective, which can not only reduce the pollution but also reduce the density of the atmosphere made by the green house efect and improve the ecosystem environment.In this work, by transesterification the Soybean oil was transformed to the substitute fuel. A kinetic model of conversion process of the Soybean oil was established based on the studying of the process, transforming mechanism and the reacting kinetics.On the transesterification of Soybean oil for production of biodiesel were investigated based on a three-level three-factor Box-Behnken design. The preparation technique parameters were optimized with Response Surface Methodology(RSM). Experimental data were analyzed by solving the regression equation with Design Expert software. It was indicated that the optimum preparation parameters are reaction time 68 minutes, the ratio of methanol to oil 6.2:1, catalyst concentration 1.1% and temperature 65℃. The biodiesel has very similar properties to those of biodiesel DIN V 51.606 IN Austrial and diesel 0# in China.The transesterification reaction using solid base catalyst was studied. The solid base catalysts can be easily separated from the product. The operation of new technology is simple. The catalyst can be recovered.All process has no pollution.But ester-exchange reaction is catalyzed by solid base catalyst, the yield and conversion of oil is low.