On the dynamic nature of Mo sites for methane dehydroaromatization

Conference paper (2019)

Authors

B. van der Linden ChemE/O&O groep - AS , ChemE/O&O groep - AS
Samy Ould-Chikh King Abdullah University of Science and Technology
I. Yarulina King Abdullah University of Science and Technology,
J. Gascon Sabate King Abdullah University of Science and Technology
Mo/HZSM-5 Methane dehydroaromatization Labelling experiments Molybdenum carbide
More Info
expand_more

Published Date

2019

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Abstract

The mechanism of methane activation on Mo/HZSM-5 is poorly described, despite the great interest in methane dehyd roa romatization (MDA) to replace oil refineries for producing aromatics. It is difficult to assess the exact nature of the active site due to fast coking. By pre-carburizing Mo/HZSM-5 with carbon monoxide, the active site for MDA can be isolated and studied without the formation of coke. This strategy helped us examine how methane is activated on the catalytic site by carrying out MDA using isotopically labelled methane (1 3 C H 4 ) . We show that carbon originating from the preformed carbide is incorporated into the main products of the reaction, ethylene and benzene, demonstrating the dynamic nature of these active sites.