Homogeneous borotungstic acid (cas 11121-17-8) and heterogeneous micellar borotungstic acid (cas 11121-17-8) catalysts for biodiesel production by esterification of free fatty acid

Add time:07/19/2019    Source:sciencedirect.com

A highly negatively charged borotungstic acid (cas 11121-17-8) H5BW12O40 had been tested as homogeneous catalyst in esterification. Compared with common used H3PW12O40, it displayed a higher conversion (98.7%) and excellent efficiency (96.2%) due to its high amount of protons in methanol. In order to overcome the drawbacks of homogeneous heteropolyacid H5BW12O40, a Brønsted-surfactant-combined (C16TA)H4BW12O40 (C16TA = cetyltrimethyl ammonium) had been fabricated with strong acidity and nano-size micellar structure resulting in enhanced activity and stability during the reaction, which exhibited consistent activity during recycling in esterification reaction.

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