Effect of steam de-alumination on the interactions of propene with H-ZSM-5 zeolites

Hawkins, A. P. , Zachariou, A., Parker, S. F., Collier, P., Barrow, N., Silverwood, I. P., Howe, R. F. and Lennon, D. (2020) Effect of steam de-alumination on the interactions of propene with H-ZSM-5 zeolites. RSC Advances, 10(39), pp. 23136-23147. (doi: 10.1039/D0RA03871G)

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Abstract

Steam de-alumination is used to prepare a H-ZSM-5 material representative of industrial acid zeolite catalysts. Characterisation shows extensive loss of zeolite acidity but minimal loss of framework crystallinity in the treated material. The material's interaction with propene is probed by means of inelastic and quasielastic neutron scattering, providing information on the reactivity and mobility of the propene respectively. These results are compared to those previously obtained for propene in the untreated zeolite. The steaming treatment resulted in decreased reactivity of the zeolite toward olefin oligomerization, higher temperatures for reaction initiation, and increased mobility of the propene in the zeolite at all temperatures. Analysis of the motions of the propene revealed by QENS shows the mobility to be comparable to those previously reported for propane in similar materials but occurring at slower velocities due to the greater rigidity and polarisation of the propene molecule.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Zachariou, Miss Andrea and Silverwood, Dr Ian and Lennon, Professor David and Hawkins, Alexander
Authors: Hawkins, A. P., Zachariou, A., Parker, S. F., Collier, P., Barrow, N., Silverwood, I. P., Howe, R. F., and Lennon, D.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:RSC Advances
Publisher:Royal Society of Chemistry
ISSN:2046-2069
ISSN (Online):2046-2069
Published Online:17 June 2020
Copyright Holders:Copyright © 2020 The Authors
First Published:First published in RSC Advances 10(39):23136-23147
Publisher Policy:Reproduced under a Creative Commons licence

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
172233Anderson ICASE 2015 (Selex)Heather LambieEngineering and Physical Sciences Research Council (EPSRC)IND CASE EP/N509176/1S&E - Academic & Student Administration