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Effect of thermal treatment on the stability of Na-Mn-W/SiO2 Catalyst for the Oxidative Coupling of Methane

Abstract

In this study, we investigate the effect of thermal treatment/calcination on the stability and activity of a Na-Mn-W/SiO2 catalyst for the oxidative coupling of methane reaction. The catalyst performance and characterisation measurements suggest that the W species are directly involved in the catalyst active site responsible for CH4 conversion. Under operating conditions, the active components, present in the form of Na-W-O-Mn molten state, are highly mobile and volatile. By varying the parameters of the calcination protocol, it was shown that these molten components can be partially stabilised, resulting in a catalyst with lower activity (due to loss of surface area) but higher stability even for long duration OCM reaction experiments.

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Article information


Submitted
18 Dec 2019
Accepted
29 Jan 2020
First published
29 Jan 2020

This article is Open Access

Faraday Discuss., 2020, Accepted Manuscript
Article type
Paper

Effect of thermal treatment on the stability of Na-Mn-W/SiO2 Catalyst for the Oxidative Coupling of Methane

D. Matras, A. Vamvakeros, S. Jacques, N. Grosjean, B. Rollins, S. Poulston, G. B. G. Stenning, H. Godini, J. Drnec, R. J. Cernik and A. M. Beale, Faraday Discuss., 2020, Accepted Manuscript , DOI: 10.1039/C9FD00142E

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