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Determination of Kinetic and Energetic Parameters of Chemical Reactions in a Heterogeneous Liquid/Liquid System
Author(s) -
Balland Laurent,
Mouhab Nordine,
Alexandrova Silvia,
Cosmao JeanMarie,
Estel Lionel
Publication year - 1999
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/(sici)1521-4125(199904)22:4<321::aid-ceat321>3.0.co;2-8
Subject(s) - mass transfer , chemistry , thermodynamics , kinetic energy , enthalpy , saponification , chemical reaction , reaction rate constant , thermal , chromatography , organic chemistry , kinetics , physics , quantum mechanics
A global method is proposed for estimating the kinetic and energetic parameters of chemical reactions taking place in the continuous phase of a heterogeneous liquid/liquid system. This method, based on energy and mass balances, uses the thermal power freed or absorbed by the reaction mass. It is only applicable to systems with sufficient thermal effects. Knowledge of the mass flow exchanged between the dispersed and continuous phases is needed to establish the mass balance. It is determined thanks to a model based on the double film theory. The model was applied to the saponification of pure ethyl acetate in an aqueous reaction mass. It was possible to determine simultaneously the velocity constant and the reaction enthalpy, as well as the apparent overall mass transfer constant.