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

doi:10.1021/acs.jpcc.8b08420

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 journal › Article › peer-review

11 Citations (Scopus)

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 language	English
Pages (from-to)	417-425
Number of pages	9
Journal	Journal of Physical Chemistry C
Volume	123
Issue number	1
Early online date	13 Dec 2018
DOIs	https://doi.org/10.1021/acs.jpcc.8b08420
Publication status	Published - 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.

Keywords

CRACKING
DIFFUSION
PROPENE
ALKANES
OLEFINS
FCC
VISUALIZATION
SPECTROSCOPY
MECHANISMS
SOFTWARE

Access to Document

10.1021/acs.jpcc.8b08420Licence: Unspecified

Cite this

@article{e09bee04e6674709a30a4a69e5f66ffd,

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

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.",

keywords = "CRACKING, DIFFUSION, PROPENE, ALKANES, OLEFINS, FCC, VISUALIZATION, SPECTROSCOPY, MECHANISMS, SOFTWARE",

author = "Hawkins, {Alexander P.} and O'Malley, {Alexander J.} and Andrea Zachariou and Paul Collier and Ewings, {Russell A.} and Silverwood, {Ian P.} and Howe, {Russell F.} and Parker, {Stewart F.} and David Lennon",

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.",

year = "2019",

month = oct,

day = "1",

doi = "10.1021/acs.jpcc.8b08420",

language = "English",

volume = "123",

pages = "417--425",

journal = "Journal of Physical Chemistry C",

issn = "1932-7447",

publisher = "American Chemical Society",

number = "1",

}

TY - JOUR

T1 - Investigation of the Dynamics of 1-Octene Adsorption at 293 K in a ZSM-5 Catalyst by Inelastic and Quasielastic Neutron Scattering

AU - Hawkins, Alexander P.

AU - O'Malley, Alexander J.

AU - Zachariou, Andrea

AU - Collier, Paul

AU - Ewings, Russell A.

AU - Silverwood, Ian P.

AU - Howe, Russell F.

AU - Parker, Stewart F.

AU - Lennon, David

N1 - 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.

PY - 2019/10/1

Y1 - 2019/10/1

N2 - 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.

AB - 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.

KW - CRACKING

KW - DIFFUSION

KW - PROPENE

KW - ALKANES

KW - OLEFINS

KW - FCC

KW - VISUALIZATION

KW - SPECTROSCOPY

KW - MECHANISMS

KW - SOFTWARE

UR - http://www.scopus.com/inward/record.url?scp=85059887411&partnerID=8YFLogxK

UR - http://eprints.gla.ac.uk/176019/

U2 - 10.1021/acs.jpcc.8b08420

DO - 10.1021/acs.jpcc.8b08420

M3 - Article

AN - SCOPUS:85059887411

SN - 1932-7447

VL - 123

SP - 417

EP - 425

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 1

ER -

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

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Fingerprint

Cite this