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

Alexander Hawkins, Alexander J O'Malley, Andrea Zachariou, Paul Collier, Russell Ewings, Ian P. Silverwood, Russell Howe, Stewart F. Parker, David Lennon

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12 Citations (SciVal)

Abstract

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
Volume123
Issue number1
Early online date13 Dec 2018
DOIs
Publication statusPublished - 1 Oct 2019

Bibliographical note

Funding Information:
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.

Publisher Copyright:
© 2018 American Chemical Society.

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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