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

Russell Howe, Alex Hawkins, Andrea Zachariou, Stewart F. Parker, P. Collier, Nathan Barrow, Ian Philip Silverwood, David Lennon*

*Corresponding author for this work

Research output: Contribution to journalArticle

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.

Original languageEnglish
Pages (from-to)23136-23147
Number of pages12
JournalRSC Advances
Volume10
Issue number39
Early online date17 Jun 2020
DOIs
Publication statusPublished - Jun 2020

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