TY - JOUR AB - A highly negatively charged borotungstic acid 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 Bronsted-surfactant-combined (C(16)TA)H4BW12O40 (C(16)TA = 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. (C) 2015 Published by Elsevier Ltd. AD - NE Normal Univ, Minist Educ, Key Lab Polyoxometalate Sci, Changchun 130024, Peoples R China AN - WOS:000354583100004 AU - Sun, Z. AU - Duan, X. X. AU - Zhao, J. AU - Wang, X. H. AU - Jiang, Z. J. DA - May DO - 10.1016/j.biombioe.2015.03.002 J2 - Biomass Bioenerg KW - heteropolyacids LA - English N1 - Ci2na PY - 2015 SN - 0961-9534 SP - 31-42 ST - Homogeneous borotungstic acid and heterogeneous micellar borotungstic acid catalysts for biodiesel production by esterification of free fatty acid T2 - Biomass & Bioenergy TI - Homogeneous borotungstic acid and heterogeneous micellar borotungstic acid catalysts for biodiesel production by esterification of free fatty acid UR - ://WOS:000354583100004 VL - 76 ID - 11916 ER -