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Preparation of catalyst systems with enhanced accessibility of active sites for process intensification

Lookup NU author(s): Dr Burak Calkan, Dr Ruba Mohamed, Professor Galip Akay

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Abstract

Most conventional catalysts are in particulate or pellet form with a narrow pore size distribution which provides large surface area but the accessibility of the inner pores is compromised. As a result, monolithic support structures are used to provide active-site accessibility, especially when expensive catalysts are used. However, catalyst coating of the support structure (in the form of monoliths or micro-channels) is not simple and the integrity of the catalyst layer is often compromised. We have recently disclosed novel catalysts system where the catalyst is part of the support forming a 3D-interconnecting network of pores. Pore size range tens of micrometers, gradually reducing to micrometer and finally to nanometer scale thus providing accessibility to the active sites with corresponding reduction in heat and mass transfer resistance. These materials are prepared through an electroless metal deposition technique using a polymeric substrate. Metallization usually takes place at 600 - 1000°C which results in the formation of 3D-interconnected porous structure made from fused porous metal grains. The size and porosity of these grains can be controlled over a wide range. Most of the structures are nickel based alloys with operating temperatures in 600 - 1200°C. The efficiency of these catalyst systems are tested using product gas from a biomass gasifier and the results are compared with the conventional catalyst systems.


Publication metadata

Author(s): Calkan B, Mohamed R, Akay G

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: CHISA: 17th International Congress of Chemical and Process Engineering

Year of Conference: 2006

Pages: no. 402

Publisher: Czech Society of Chemical Engineering

URL: http://www.chisa.cz/2006/programfin/J.aspx

Library holdings: Search Newcastle University Library for this item

ISBN: 8086059456


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