Volume 229, 2021

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. 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 a 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.

Graphical abstract: Effect of thermal treatment on the stability of Na–Mn–W/SiO2 catalyst for the oxidative coupling of methane

Associated articles

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Article information

Article type
Paper
Submitted
18 دسمبر 2019
Accepted
29 جنؤری 2020
First published
29 جنؤری 2020
This article is Open Access
Creative Commons BY license

Faraday Discuss., 2021,229, 176-196

Effect of thermal treatment on the stability of Na–Mn–W/SiO2 catalyst for the oxidative coupling of methane

D. Matras, A. Vamvakeros, S. D. M. Jacques, N. Grosjean, B. Rollins, S. Poulston, G. B. G. Stenning, H. R. Godini, J. Drnec, R. J. Cernik and A. M. Beale, Faraday Discuss., 2021, 229, 176 DOI: 10.1039/C9FD00142E

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