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Modelling catalytic combustion of carbon monoxide and hydrocarbons over catalytically active wire meshes

Ahlstrom-Silversand, AF and Odenbrand, Ingemar LU (1999) In Chemical Engineering Journal 73(3). p.205-216
Abstract
A new way of preparing catalytically active wire meshes through a thermal-spray technique is described. A metal substrate (e.g. Kanthal AF) was plasma-sprayed with a composite ceramic/polymer-powder. The polymer content of the sprayed layer was burnt off whereupon a well-defined macro-porosity was created. By treating the so obtained material with an alumina-sol the specific surface area could be increased by a factor of 50 or more. The ceramic layer was finally activated with precious metals through an impregnation step. A numerical model was developed to compare the performance of wire-mesh-, monolith- and pellets catalysts. The model describes the resistance to internal and external mass- and heat transfer and the effects of axial... (More)
A new way of preparing catalytically active wire meshes through a thermal-spray technique is described. A metal substrate (e.g. Kanthal AF) was plasma-sprayed with a composite ceramic/polymer-powder. The polymer content of the sprayed layer was burnt off whereupon a well-defined macro-porosity was created. By treating the so obtained material with an alumina-sol the specific surface area could be increased by a factor of 50 or more. The ceramic layer was finally activated with precious metals through an impregnation step. A numerical model was developed to compare the performance of wire-mesh-, monolith- and pellets catalysts. The model describes the resistance to internal and external mass- and heat transfer and the effects of axial dispersion. The wire-mesh model was verified through experiments. Different evaluation parameters were derived to compare the catalyst performance relative to the catalyst volume, the geometric weight, the catalyst weight, the pressure drop and the temperature response. Wire-mesh catalysts offer the following advantages: high mass and heat transfer numbers, moderate pressure drop, insignificant effects of pore diffusion and axial dispersion, thermal and mechanical strength, geometric flexibility, excellent thermal response, simplicity in the catalyst recovery. The cost of a wire-mesh catalyst is expected to be competitive to other alternatives. (C) 1999 Elsevier Science S.A. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
wire mesh, catalytic combustion, thermal spraying, modelling, monolith, pellets
in
Chemical Engineering Journal
volume
73
issue
3
pages
205 - 216
publisher
Elsevier
external identifiers
  • wos:000081212400002
  • scopus:0344200011
ISSN
1385-8947
DOI
10.1016/S1385-8947(99)00029-7
language
English
LU publication?
yes
id
b7d953c3-4cef-4cca-9efb-27b6b3a7e033 (old id 3916331)
date added to LUP
2013-07-02 13:50:07
date last changed
2017-06-11 04:25:58
@article{b7d953c3-4cef-4cca-9efb-27b6b3a7e033,
  abstract     = {A new way of preparing catalytically active wire meshes through a thermal-spray technique is described. A metal substrate (e.g. Kanthal AF) was plasma-sprayed with a composite ceramic/polymer-powder. The polymer content of the sprayed layer was burnt off whereupon a well-defined macro-porosity was created. By treating the so obtained material with an alumina-sol the specific surface area could be increased by a factor of 50 or more. The ceramic layer was finally activated with precious metals through an impregnation step. A numerical model was developed to compare the performance of wire-mesh-, monolith- and pellets catalysts. The model describes the resistance to internal and external mass- and heat transfer and the effects of axial dispersion. The wire-mesh model was verified through experiments. Different evaluation parameters were derived to compare the catalyst performance relative to the catalyst volume, the geometric weight, the catalyst weight, the pressure drop and the temperature response. Wire-mesh catalysts offer the following advantages: high mass and heat transfer numbers, moderate pressure drop, insignificant effects of pore diffusion and axial dispersion, thermal and mechanical strength, geometric flexibility, excellent thermal response, simplicity in the catalyst recovery. The cost of a wire-mesh catalyst is expected to be competitive to other alternatives. (C) 1999 Elsevier Science S.A. All rights reserved.},
  author       = {Ahlstrom-Silversand, AF and Odenbrand, Ingemar},
  issn         = {1385-8947},
  keyword      = {wire mesh,catalytic combustion,thermal spraying,modelling,monolith,pellets},
  language     = {eng},
  number       = {3},
  pages        = {205--216},
  publisher    = {Elsevier},
  series       = {Chemical Engineering Journal},
  title        = {Modelling catalytic combustion of carbon monoxide and hydrocarbons over catalytically active wire meshes},
  url          = {http://dx.doi.org/10.1016/S1385-8947(99)00029-7},
  volume       = {73},
  year         = {1999},
}