McInroy, A. R., Winfield, J. M., Dudman, C. C., Jones, P. and Lennon, D. (2019) Investigating the acid site distribution of a new-generation methyl chloride synthesis catalyst. ACS Omega, 4(9), pp. 13981-13990. (doi: 10.1021/acsomega.9b01719) (PMID:31497716) (PMCID:PMC6714609)
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Abstract
The effect of modifying an η-alumina methyl chloride synthesis catalyst by doping with CsCl and KCl over the concentration range of 0.1–1.0 mmol g(cat)–1 is investigated by a combination of pyridine chemisorption coupled with infrared spectroscopy and mass-selective temperature-programmed desorption measurements. The loading of group 1 metal chloride is equivalent to a titrant that enables selective neutralization of Lewis acid sites present at the surface of the reference η-alumina catalyst. Specifically, a loading of 0.1 mmol g(cat)–1 is sufficient to neutralize the strong Lewis acid sites; a loading of 0.6 mmol g(cat)–1 is sufficient to neutralize the strong and medium-strong Lewis acid sites; a loading of 1.0 mmol g(cat)–1 neutralizes all of the strong and medium-strong Lewis acid sites and partially neutralizes the medium-weak Lewis acid site. These deductions connect with a catalyst design program to develop a methyl chloride synthesis catalyst that exhibits minimal formation of the byproduct dimethyl ether.
Item Type: | Articles |
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Additional Information: | The EPSRC (grant number GR/P01984/01) and Ineos Chlor are thanked for project support and the provision of an Industrial CASE award (ARM). |
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Winfield, Professor John and Lennon, Professor David |
Authors: | McInroy, A. R., Winfield, J. M., Dudman, C. C., Jones, P., and Lennon, D. |
College/School: | College of Science and Engineering > School of Chemistry |
Journal Name: | ACS Omega |
Publisher: | American Chemical Society |
ISSN: | 2470-1343 |
ISSN (Online): | 2470-1343 |
Published Online: | 12 August 2019 |
Copyright Holders: | Copyright © 2019 American Chemical Society |
First Published: | First published in ACS Omega 4(9): 13981-13990 |
Publisher Policy: | Reproduced under a Creative Commons License |
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