Deactivation study of the hydrodeoxygenation of p-methylguaiacol over silica supported rhodium and platinum catalysts

Bouxin, F.P., Zhang, X., Kings, I.N., Lee, A.F., Simmons, M.J.H., Wilson, K. and Jackson, S.D. (2017) Deactivation study of the hydrodeoxygenation of p-methylguaiacol over silica supported rhodium and platinum catalysts. Applied Catalysis A: General, 539, pp. 29-37. (doi:10.1016/j.apcata.2017.03.039)

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Abstract

Hydrodeoxygenation of para-methylguaiacol using silica supported Rh or Pt catalysts was investigated using a fixed-bed reactor at 300 °C, under 4 barg hydrogen and a WHSV of 2.5 h−1. The activity, selectivity and deactivation of the catalysts were examined in relation to time on stream. Three catalysts were tested: 2.5% Rh/silica supplied by Johnson Matthey (JM), 2.5% Rh/silica and 1.55% Pt/silica both prepared in-house. The Rh/silica (JM) showed the best stability with steady-state reached after 6 h on stream and a constant activity over 3 days of reaction. In contrast the other two catalysts did not reach steady state within the timeframe of the tests, with continuous deactivation over the time on stream. Nevertheless higher coking was observed on the Rh/silica (JM) catalyst, while all three catalysts showed evidence of sintering. The Pt catalyst (A) showed higher selectivity for the production of 4-methylcatechol while the Rh catalysts were more selective toward the cresols. In all cases, complete hydrodeoxygenation of the methylguaiacol to methylcyclohexane was not observed.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Jackson, Professor Samuel and Bouxin, Dr Florent
Authors: Bouxin, F.P., Zhang, X., Kings, I.N., Lee, A.F., Simmons, M.J.H., Wilson, K., and Jackson, S.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:31 March 2017
Copyright Holders:Copyright © 2017 Elsevier B.V.
First Published:First published in Applied Catalysis A: General 539:29-37
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
654181Catalytic HDO (UK Catalysis hub)Samuel JacksonEngineering & Physical Sciences Research Council (EPSRC)EP/K014706/1CHEM - CHEMISTRY
652891Towards closing the chlorine cycle in large-scale chemical manufacturing processes (UK Catalysis hub)David LennonEngineering & Physical Sciences Research Council (EPSRC)EP/K014854/1CHEM - CHEMISTRY