3-2-2 直交流電場を用いた粗製バイオディーゼル燃料の精製(3-2 バイオディーゼル1,Session3 バイオマス等,研究発表)

概要

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An emulsification/demulsification technique was applied to purify crude Bio-Diesel Fuel (BDF) for the purpose of reducing amounts of water needed. The emulsifications were achieved by adding a small amount of water to crude BDF. The added water was emulsified with ease because of existence of sodium soaps in crude BDF. The soaps are considered to be produced through chemical reactions between sodium catalyst and free fatty acids. The demulsification was achieved by applying AC-DC voltage to the emulsions. The amount of water needed to purify crude BDF was studied based on distribution coefficients of impurities. Alkali metals, glycerol, methanol and water were removed simultaneously from the emulsion by the demulsification. By microscopic observations, it was confirmed that the droplets formed by the emulsification were removed by the demulsification. The demulsified samples were heated in order to evaporate water. The obtained samples could meet the bio-diesel fuel standards, EN14214 and JIS K 2390, in terms of the impurities. By applying the emulsification/demulsification technique, the amount of water could be reduced less than 2.1 volumetric % of general crude BDF.
2011-08-09