Resumo

CARDOZO, J. C; BARRERA ZAPATA, Rolando  e  GIRALDO, S. A. The Kinetic Palm Oil Transesterification with a Calcium Methoxide. Ciencia en Desarrollo [online]. 2014, vol.5, n.1, pp.65-75. ISSN 0121-7488.

In this study, two new kinetic models for the palm oil transesterification with methanol, by using calcium oxide, are proposed. The first model, which includes the alcohol and the oil’s adsorption on the catalyst, is carried out by the Langmuir-Hinshelwood mechanisms, while the second model only considers the alcohol adsorption on the solid, through the Eley-Rideal mechanisms. The Kinetic parameters were determined, by using the initial reaction rates method (t < 30 min), while the data taken for longer times (until 240 min) were used for the models validation. For the proposed models’ deduction, it was studied the alcohol/oil molar ratio’s variation effect (4.9-8.9), of the catalyst %w/w (0.3-0.7) and the temperature (328-338 K) on the reaction speed. The kinetic parameters were determined using the initial reaction rates method (t < 30 min), while the data taken for longer times (until 240 min) were used for models validation. It was found that the proposed models represent, an acceptable experimental data, according to the squared residuals’ sum < 0.045. The models contribute to this catalytic system understanding, by introducing the adsorption/desorption concepts, on the reaction kinetics.

Palavras-chave : Calcium Oxide Eley-Rideal Mechanisms; Heterogeneous Kinetic; Langmuir-Hinshelwood Mechanisms; Palm Oil; Reaction Mechanism.

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