Investigation of the Dynamics of 1-Octene Adsorption at 293 K in a ZSM-5 Catalyst by Inelastic and Quasielastic Neutron Scattering

Alexander P. Hawkins, Alexander J. O'Malley, Andrea Zachariou, Paul Collier, Russell A. Ewings, Ian P. Silverwood, Russell F. Howe, Stewart F. Parker, David Lennon* (Corresponding Author)

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


The properties of 1-octene adsorbed in zeolite ZSM-5 at 293 K are studied by means of inelastic and quasielastic neutron scatterings (INS and QENS) to investigate interactions relevant to the zeolite solid acid catalysis of fluidized catalytic cracking reactions. The INS spectrum is compared to that recorded for the solid alkene and reveals significant changes of bonding on adsorption at ambient temperatures; the changes are attributed to the oligomerization of the adsorbed 1-octene to form a medium chain n-alkane or n-alkane cation. QENS analysis shows that these oligomers are immobilized within the zeolite pore structure, but a temperature-dependant fraction is able to rotate around their long axis within the pore channels.

Original languageEnglish
Pages (from-to)417-425
Number of pages9
JournalJournal of Physical Chemistry C
Issue number1
Early online date13 Dec 2018
Publication statusPublished - 1 Oct 2019

Bibliographical note

Johnson Matthey plc and the EPSRC are thanked for postgraduate student support (A.P.H., A.Z.) via the Industrial CASE scheme. Johnson Matthey plc is additionally thanked for provision of the ZSM-5 catalyst. A.J.O. acknowledges the Ramsay Memorial Trust for the provision of a Ramsay Memorial Fellowship. The Science and Technology Facilities Council is thanked for the provision of neutron beamtime. The resources and support provided by the UK Catalysis Hub via membership of the UK Catalysis Hub consortium and funded by EPSRC (grants EP/K014706/1, EP/K014668/1, EP/K014854/1, EP/K014714/1, and EP/M013219/1) are gratefully acknowledged. Daniel Dervin (Queens University Belfast) is thanked for useful discussions on the principles of QENS analysis.


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