Journal
JOURNAL OF CATALYSIS
Volume 331, Issue -, Pages 13-24Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2015.08.010
Keywords
1-Hexene; 1-Octene; Heptanoic acid; Esterification; Kinetics; Mechanism; Adsorption; Amberlyst (R) 15; Eley-Rideal; Langmuir-Hinshelwood
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The reversible, direct esterification of 1-hexene and 1-octene with heptanoic acid on Amberlyst (R) 15 (dry) was studied at 75 degrees C to determine kinetics and mechanism. The forward surface reaction occurred by an Eley-Rideal mechanism, in which adsorbed olefin reacted with bulk phase heptanoic acid; the reverse reaction, ester decomposition, required just one surface site. While detailed studies pointed to an Eley-Rideal mechanism, a Langmuir-Hinshelwood mechanism was nearly as good as the Eley-Rideal mechanism for reproducing kinetic data observed across several hours of reaction. Authors conclude that a cursory investigation can support a Langmuir-Hinshelwood mechanism, while a detailed investigation supports an Eley-Rideal mechanism in this system. (C) 2015 Elsevier Inc. All rights reserved.
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