Phosgene formation via carbon monoxide and dichlorine reaction over an activated carbon catalyst: reaction kinetics and mass balance relationships

Rossi, G. E., Winfield, J. M., Mitchell, C. J., Meyer, N., Jones, D. H., Carr, R. H. and Lennon, D. (2020) Phosgene formation via carbon monoxide and dichlorine reaction over an activated carbon catalyst: reaction kinetics and mass balance relationships. Applied Catalysis A: General, 602, 117688. (doi: 10.1016/j.apcata.2020.117688)

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Abstract

The reaction of carbon monoxide and dichlorine over an activated carbon catalyst to produce phosgene is examined using a previously described micro-reactor arrangement. An activation energy of 34.1 kJ mol−1 is determined. The reaction profile at 323 K as a function of time-on-stream establishes steady-state operation to be achieved rapidly, with no deactivation evident within a reaction time of 300 min.. Phosgene production seemingly exhibits 100 % selectivity. However, mass balance measurements indicate a small degree of carbon and chlorine retention by the catalyst that is not directly coupled to the formation of gaseous phosgene. The molecular form of the retained moieties is unknown but, nonetheless, their presence reduces the atom economy of the process and, correspondingly, attenuates total phosgene selectivity. The order of reaction with respect CO, Cl2 and COCl2 is, respectively, 1, 0.5 and 0; leading to the determination of the rate law for phosgene production over this catalyst.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Winfield, Professor John and Rossi, Giovanni and Lennon, Professor David
Authors: Rossi, G. E., Winfield, J. M., Mitchell, C. J., Meyer, N., Jones, D. H., Carr, R. H., and Lennon, D.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Applied Catalysis A: General
Publisher:Elsevier
ISSN:0926-860X
ISSN (Online):1873-3875
Published Online:06 June 2020
Copyright Holders:Copyright © 2020 The Author(s).
First Published:First published in Applied Catalysis A: General 602:117688
Publisher Policy:Reproduced under a Creative Commons licence

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
190235Nanostructured Substrates for Cell and Tissue EngineeringDavid CummingEngineering and Physical Sciences Research Council (EPSRC) (EPSRC)KTA EP/H500138/1ENG - Electronics & Nanoscale Engineering