Heterogeneous catalysed esterification of propionic acid with n-amyl alcohol over a microporous cation-exchange resin dowex 50wx4
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Date
2010
Authors
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Publisher
Walter De Gruyter GMBH
Abstract
Kinetics of heterogeneous catalysed esterification of propionic acid with n-amyl alcohol was studied with a microporous cation-exchange resin catalyst. Dowex 50Wx4, in a stirred batch reactor to synthesise amyl propionate. Effects of various parameters such as speed of agitation, catalyst loading, and reaction temperature on reaction rate were investigated. The equilibrium conversion of propionic acid increased with in catalyst loading and reaction temperature. Stirrer speed had virtually no effect on the reaction rate under the experimental conditions. The apparent activation energy was found to be 43.167 kJmol(-1) for the formation of amyl propionate and the equilibrium constant, which is independent of temperature ranging from 318 to 348 K. was found to be 4.05. It was also observed that the initial reaction rate decreased with water concentrations and increased with that of acid and increased with that of alcohol linearly. The reaction was found to occur between an adsorbed acid molecule and a molecule of alcohol in the bulk and it was concluded that the reaction mechanism can be represented by Eley-Rideal model.
Description
Keywords
Propionic acid, Heterogeneous catalysis, n-Amyl Alcohol, Dowex 50Wx4, Liquid-phase esterification, Acetic-acid, Kinetics, Methanol, Isobutanol, Chemistry, Activation energy, Batch reactors, Catalysis, Catalysts, Equilibrium constants, Esters, Ion exchange resins, Microporosity, Molecules, Positive ions, Reaction rates, Saturated fatty acids, Volatile fatty acids, Amyl alcohol, Apparent activation energy, Cation exchange resins, Dowex 50Wx4, Equilibrium conversion, Experimental conditions, Reaction temperature, Water concentrations, Propionic acid
Citation
Erdem, B. ve İzci, A. (2010). "Heterogeneous catalysed esterification of propionic acid with n-amyl alcohol over a microporous cation-exchange resin dowex 50wx4". Zeitschrift fur Physikalische Chemie, 224(5), 781-793.