On the influences of surface heat release and thermal radiation upon transport in catalytic porous microreactors—a novel porous-solid interface model

Saeed, A., Karimi, N. , Hunt, G. and Torabi, M. (2019) On the influences of surface heat release and thermal radiation upon transport in catalytic porous microreactors—a novel porous-solid interface model. Chemical Engineering and Processing: Process Intensification, 143, 107602. (doi:10.1016/j.cep.2019.107602)

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Abstract

A novel porous-solid interface model is put forward to analyse the distribution of heat generated by exothermic catalytic reactions on the inner walls of a porous microreactor. This builds upon a recent theoretical development on the local thermal non-equilibrium interface modelling and further advances that to include thermal radiation. The model is then utilised by an analytical investigation of transport phenomena in a parallel-plates, porous microreactor. Two-dimensional, closed form solutions are developed for the velocity, temperature and concentration fields and analytical expressions are derived for Nusselt and Sherwood number as well as local and total entropy generation. The results show that exothermic catalytic activities can significantly affect the transport processes in microreactor by modifying the values of Nusselt and Sherwood number. This can be highly intensified by an imbalance in the catalytic activities of microreactor surfaces. It is further shown that interactions of the surface heat release with thermal radiation and heat losses through the walls introduce a wealth of Nusselt and Sherwood number behaviours, which considerably differ from those of non-catalytic systems. These clearly demonstrate the importance of including surface heat release in non-equilibrium analyses of the catalytic porous microreactors in which catalysts are placed on the walls.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Hunt, Graeme and Karimi, Dr Nader
Authors: Saeed, A., Karimi, N., Hunt, G., and Torabi, M.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Chemical Engineering and Processing: Process Intensification
Publisher:Elsevier
ISSN:0255-2701
ISSN (Online):1873-3204
Published Online:29 July 2019
Copyright Holders:Copyright © 2019 The Authors
First Published:First published in Chemical Engineering and Processing: Process Intensification 143:107602
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
709761Thermally Driven Heat Pump Based on an Integrated Thermodynamic Cycle for Low Carbon Domestic Heating (Therma-Pump)Zhibin YuEngineering and Physical Sciences Research Council (EPSRC)EP/N020472/1ENG - ENGINEERING SYSTEMS POWER & ENERGY

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