2010Progress in Reaction Kinetics and MechanismRequires access

Kinetic Study of the Esterification of Acetic Acid with 1-Butanol Catalysed by Alumina-Supported Tungstophosphoric Acid

Emine Sert, Ferhan Sami Atalay

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Abstract

The kinetics of the esterification of acetic acid with 1-butanol in the presence of alumina-supported tungstophosphoric acid (TPA) was studied. The uncatalysed reaction was shown to proceed by a second-order mechanism. In the presence of the catalyst, the reaction was found to occur between an adsorbed alcohol molecule and a molecule of acid in the bulk fluid (Eley–Rideal mechanism). It was found that alumina-supported TPA is suitable for this reaction because the activation energy was reduced from 58.0 to 37.3 kJ mol−1. The catalyst was characterized by thermogravimetric analysis, X-ray diffraction, scanning electron microscope, nitrogen adsorption study and IR spectroscopy.

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What this paper is about

The kinetics of the esterification of acetic acid with 1-butanol in the presence of alumina-supported tungstophosphoric acid (TPA) was studied. The uncatalysed reaction was shown to proceed by a second-order mechanism. In the presence of the catalyst, the reaction was found to occur between an adsorbed alcohol molecule and a molecule of acid in the bulk fluid (Eley–Rideal mechanism). It was found that alumina-supported TPA is suitable for this reaction because the activation energy was reduced from 58.0 to 37.3 kJ mol−1. The catalyst was characterized by thermogravimetric analysis, X-ray diffraction, scanning electron microscope, nitrogen adsorption study and IR spectroscopy.

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Available abstract

The kinetics of the esterification of acetic acid with 1-butanol in the presence of alumina-supported tungstophosphoric acid (TPA) was studied. The uncatalysed reaction was shown to proceed by a second-order mechanism. In the presence of the catalyst, the reaction was found to occur between an adsorbed alcohol molecule and a molecule of acid in the bulk fluid (Eley–Rideal mechanism). It was found that alumina-supported TPA is suitable for this reaction because the activation energy was reduced from 58.0 to 37.3 kJ mol−1. The catalyst was characterized by thermogravimetric analysis, X-ray diffraction, scanning electron microscope, nitrogen adsorption study and IR spectroscopy.

Key concepts: Chemistry, Catalysis, Thermogravimetric analysis, Acetic acid, Adsorption, Activation energy, Molecule, Inorganic chemistry

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