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Kinetic study and effect of water on methane oxidation to methanol over copper-exchanged mordenite

Abstract

The selective oxidation of methane directly to methanol is currently one of the most studied topics. A promising approach, which receives increasing attention during the past decade is methane oxidation over copper-exchanged zeolites via chemical looping. In the present study, the kinetics of methane reacting over oxygen-activated copper-exchanged mordenite was studied by means of in situ infrared spectroscopy. Methoxy species and carbon monoxide are primary reaction products and formed directly from methane. Partial poisoning with water after the oxygen activation and before the methane reaction leads to the decrease of methanol yield, which is associated with the blockage of at least two copper atoms in the active site per one water molecule. However, the poisoning is reversible and the increase of the methane pressure increases the activity of the CuMOR due to the competitive adsorption over the active sites. As such, even if the zeolite is not fully dehydrated, low temperature isothermal conversion of methane to methane via chemical looping becomes possible.

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Publication details

The article was received on 26 Aug 2019, accepted on 23 Nov 2019 and first published on 26 Nov 2019


Article type: Paper
DOI: 10.1039/C9CY01711A
Catal. Sci. Technol., 2019, Accepted Manuscript

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    Kinetic study and effect of water on methane oxidation to methanol over copper-exchanged mordenite

    V. L. Sushkevich and J. van Bokhoven, Catal. Sci. Technol., 2019, Accepted Manuscript , DOI: 10.1039/C9CY01711A

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