Phosgene formation via carbon monoxide and dichlorine reaction over an activated carbon catalyst: Towards a reaction model

Rossi, G. E., Winfield, J. M., Meyer, N., Jones, D. H., Carr, R. H. and Lennon, D. (2021) Phosgene formation via carbon monoxide and dichlorine reaction over an activated carbon catalyst: Towards a reaction model. Applied Catalysis A: General, 609, 117900. (doi: 10.1016/j.apcata.2020.117900)

[img] Text
225730.pdf - Accepted Version
Available under License Creative Commons Attribution Non-commercial No Derivatives.

583kB

Abstract

The reaction of carbon monoxide and dichlorine over an activated carbon (Donau Supersorbon K40) to produce phosgene is examined. Individual reagent and product breakthrough measurements over the clean catalyst establish the magnitude of adsorption coefficients (K) to follow the trend: KCl2 > KCOCl2 >> KCO. Chlorine adsorption measurements indicate a distribution of actives sites that conforms to a two-site model, with the sites classified according to their enthalpy of adsorption. At 323 K, Type-I and Type-II sites exhibit respective adsorption capacities of 2.8 ± 0.3 and 1.5 ± 0.4 mmol Cl2 g-1cat. Post-reaction temperature-programmed desorption measurements alongside elemental analysis (SEM-EDAX) confirm the presence of retained chlorine moieties at the catalyst surface. These observations are rationalised within a postulated reaction scheme that accounts for sustained phosgene synthesis over the selected activated carbon.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Winfield, Professor John and Rossi, Giovanni and Lennon, Professor David
Creator Roles:
Rossi, G. E.Investigation, Validation, Writing – review and editing, Data curation, Visualization
Winfield, J. M.Methodology, Investigation, Writing – review and editing
Lennon, D.Conceptualization, Methodology, Investigation, Project administration, Supervision, Writing – original draft, Writing – review and editing
Authors: Rossi, G. E., Winfield, J. M., 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:27 October 2020
Copyright Holders:Copyright © 2020 Elsevier B.V.
First Published:First published in Applied Catalysis A: General 609: 117900
Publisher Policy:Reproduced in accordance with the publisher copyright policy

University Staff: Request a correction | Enlighten Editors: Update this record