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Kinetic modeling and mechanistic investigations of transesterification of propylene carbonate with methanol over an Fe–Mn double metal cyanide catalyst

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Abstract

Kinetic modeling of transesterification of propylene carbonate with methanol using an Fe–Mn double metal cyanide catalyst has been investigated based on experimental data obtained under kinetically controlled conditions in a batch slurry reactor in the 140–200 °C range. A simple two-step power law model was found to represent the experimental data well. In addition, a detailed kinetic model based on a molecular level description of the reaction mechanism is also evaluated to provide better insight into the reaction mechanism. It is found that a kinetic model based on the following mechanistic steps provides the best description of the experimental data: (a) activation of methanol by the catalyst to form a methoxy intermediate, (b) activation of propylene carbonate by interaction with the methoxy intermediate to form a second intermediate, (c) reaction of the second intermediate with methoxy species to form a third intermediate which decomposes into the final products dimethyl carbonate and propylene glycol with regeneration of the catalyst precursor. The kinetic model along with mechanistic insights from the present study provides rational guidance for catalyst redesign and process optimization.

Graphical abstract: Kinetic modeling and mechanistic investigations of transesterification of propylene carbonate with methanol over an Fe–Mn double metal cyanide catalyst

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Publication details

The article was received on 15 Sep 2019, accepted on 24 Oct 2019 and first published on 24 Oct 2019


Article type: Paper
DOI: 10.1039/C9RE00372J
React. Chem. Eng., 2019, Advance Article

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    Kinetic modeling and mechanistic investigations of transesterification of propylene carbonate with methanol over an Fe–Mn double metal cyanide catalyst

    Z. Song, B. Subramaniam and R. V. Chaudhari, React. Chem. Eng., 2019, Advance Article , DOI: 10.1039/C9RE00372J

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