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Effects of Brønsted and Lewis Acidities on Catalytic Activity of Heteropolyacids in Transesterification and Esterification Reactions
Author(s) -
Shi W.,
Zhao J.,
Yuan X.,
Wang S.,
Wang X.,
Huo M.
Publication year - 2012
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201100206
Subject(s) - transesterification , catalysis , chemistry , biodiesel , lewis acids and bases , brønsted–lowry acid–base theory , organic chemistry , biodiesel production , inorganic chemistry
Some salts of H 3 PW 12 O 40 ‐M x/n H 3–x PW 12 O 40 (abbreviated as M x/n H 3–x PW) were prepared and used as acid catalysts for transesterification and esterification reactions. These catalysts have double acidity properties, i.e., Lewis acidity and Brønsted acidity, that are suitable for the conversion of waste cooking oil into biodiesel. The highest efficiency was 59.2 % and 94.7 % corresponding to transesterification and esterification reactions by Ti 0.6 H 0.6 PW with moderate Lewis acidity. The relationship between the acidic properties and the catalytic activity is discussed in detail.