How Cesium Phosphotungstic Catalyzed Swida Wilsoniana Fruit Oil
Biodiesel refers to oil crops, oil plants and algae and other aquatic plants oil and animal fats, waste food oil as raw oil by transesterification process made of methyl or ethyl ester of fuel.
It is environmentally friendly and clean energy. Swida wilsoniana fruit oil as raw material and diesel combustion performance similar to bio diesel, is a safe, clean biomass fuel oil.
Method for producing bio diesel are generally homogeneous alkaline and acid catalysis method, homogeneous acid process can produce a large amount of acidic waste water, no environmental significance, homogeneous alkaline law is prone to saponification reaction, which leads to difficult separation of bio diesel products. So, in addition to the above two methods, is there a better solution?
After repeated attempts, Li Nian, a scholar at the Central South University, found that cesium phosphotungstic could be a catalyst for this problem and has done a test for it. Cesium phosphotungstic is one of tungsten heteropoly acids and is often used as an industrial petrochemical catalyst.
During the experiment, he took a certain amount of swida wilsoniana fruit oil and cesium phosphotungstic catalyst, added to the drying, and equipped with magnetic stirring, a thermometer and condenser tube in three flasks, when the oil phase temperature rises to the set reaction temperature, a certain amount of methanol and cosolvent (THF) are added to prepare the esterification reaction at constant temperature. After the reaction is completed, the solid catalyst is removed by centrifugal separation, and the liquid is placed in a separating funnel to be placed statically, and the product is automatically layered: The upper layer is bio diesel, and the lower layer is glycerin and unreacted methanol.
The results show that the solid cesium phosphotungstic has stronger catalytic activity than the traditional acid method, as a solid catalyst, cesium phosphotungstic can catalyze the preparation of biodiesel. It has the advantages of high efficiency, green and environmental protection, moreover, the temperature of ester exchange reaction is not too high, so it is more suitable for industrialization promotion of biodiesel.
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