Kinetics of ionic liquid-heteropolyanion salts catalyzed transesterification of oleic acid methyl ester: A study by sequential method

• Kinetic model by a sequential method was proposed.
• The kinetics of transesterification of oleic acid methyl ester for bio-lubricant product was analyzed.
• The experimental data at maximum concentration is crucial for the analysis.
• Kinetic parameters calculated by model are representative and reliable.
• Verification and application of the method have been discussed.

The kinetics of ionic liquid-heteropolyanion (IL-HPA) salts catalyzed transesterification of oleic acid methyl ester (OAME) was studied via a sequential method. The method can be separated into two parts. The first part was to analyze the kinetics of transesterification of OAME catalyzed by a novel catalyst and to provide a way to simulate the reaction rate profile. The second part was to verify the appropriateness of kinetic parameters calculated in the first part. Kinetic parameters were properly determined and reaction rate profiles were adequately simulated by regarding transesterification as a second order reaction. A good agreement between the experimental data and theoretically predicted values is obtained. This method may be applicable to most of three-step consecutive reaction whose tmax,first intermediate and tmax,second intermediate at the maximum concentration are acquirable, representatively and reliably.

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