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Elementary steps in the formation of hydrocarbons from surface methoxy groups in HZSM-5 seen by synchrotron infrared microspectroscopy

Minova, Ivalina B., Matam, Santhosh K., Greenaway, Alex, Catlow, C. Richard A., Frogley, Mark D., Cinque, Gianfelice, Wright, Paul A. and Howe, Russell F. 2019. Elementary steps in the formation of hydrocarbons from surface methoxy groups in HZSM-5 seen by synchrotron infrared microspectroscopy. ACS Catalysis 9 (7) , pp. 6564-6570. 10.1021/acscatal.9b01820

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Abstract

Synchrotron infrared microspectroscopy has identified with high temporal resolution (down to 0.25 s) the initial events occurring when methanol vapor is in contact with a crystal of zeolite HZSM-5. The first alkenes are generated directly from methoxy groups formed at the acid sites via their deprotonation. These alkenes can either desorb directly or oligomerize and cyclize to form dimethylcyclopentenyl cations. The oligomeric and dimethylcyclopentenyl cations are the first major components of the hydrocarbon pool that precede aromatic hydrocarbons and lead to indirect alkene formation. The technique observes these events in real time.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Publisher: American Chemical Society
ISSN: 2155-5435
Funders: EPSRC
Date of First Compliant Deposit: 22 August 2019
Date of Acceptance: 17 June 2019
Last Modified: 17 Jun 2020 02:05
URI: http://orca.cf.ac.uk/id/eprint/125060

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