SYNTHESIS OF ISOBUTYL PROPIONATE USING AMBERLYST 15 AS A CATALYST
Advancing the chemical engineering fundamentals
Catalysis (T2-13P)
Keywords: Esterification, Heterogenous Catalyst, Isobutyl propionate, Kinetics.
Alime Izci Citak*, Halit L. Hoşgün
Department of Chemical Engineering, Eskişehir Osmangazi University, 26480 Eskişehir, Turkey
*Corresponding author. Tel.: + 90-222-2393750-3285 ; Fax: + 90-222-2393613
E-mail addresses: acitak@ogu.edu.tr (A. Izci Citak), lhosgun@ogu.edu.tr (Halit L.Hoşgün)
In this study, the adsorption equilibrium constants of adsorbed species and the kinetic parameters of the reaction of isobutanol with propionic acid were investigated. Experiments were carried out in a stirred batch reactor using dioxan as a solvent. The reaction has been catalyzed heterogeneously by an acidic ion-exchange resin ( Amberlyst-15). The chemical equilibrium composition was measured at temperature ranges of 318-348 K and kinetic information was also obtained at the same temperature intervals at various starting compositions of the reactants and products. For this reaction, the mechanism was found to follow the Eley-Rideal theory in which an adsorbed and protonated propionic acid molecule reacted with an isobutanol molecule in the bulk. The rate limiting step is the surface reaction. Using experimental data and reaction equilibrium equations, the esterification reaction concentration based equilibrium constants were calculated at the same temperature ranges. The activation energy of the esterification reaction was found to be 42.5 kj/mol. The heat of adsorption for isobutanol and water was also calculated as -36.9 kj/mol and -48.7 kj/mol, respectively.
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Presented Wednesday 19, 13:30 to 15:00, in session Catalysis (T2-13P).
