Esterification of fatty acids with ethanol over layered zinc laurate and zinc stearate – kinetic modeling

Eduardo Paiva, Stefano Sterchele, Marcos Lúcio Corazza, Dmitry Murzin, Fernando Wypych, Tapio Salmi

Research output: Contribution to journalArticleScientificpeer-review

21 Citations (Scopus)

Abstract

This work is focused on the esterification of fatty acids (commercial oleic mix) with zinc carboxylates (layered metal soap). About 25 experiments were performed, with and without catalyst, yielding a kinetic model based on the Eley–Rideal approach, able to predict fatty acid conversions under different conditions (molar ratio fatty acids/ethanol and temperature). An apparent first order reaction with respect to both reactants with no diffusion limitations was proposed. The activation energy of 80 kJ/mol was found. Fatty acid conversion up to 92% was reached under some conditions and the catalytic yields compared to the blank ones reached 40% in less than 90 min of reaction. This catalyst has shown a unique behavior among all other catalysts available for esterification, acting similarly to a homogeneous catalyst during the reaction but being recovered like a heterogenous catalyst at the end of the process.
Original languageUndefined/Unknown
Pages (from-to)445–454
JournalFuel
Volume153
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

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