Paper Title:

Cordierite Foam Supports Washcoated with Zeolite-Based Catalysts for Volatile Organic Compounds (VOCs) Combustion

Periodical Materials Science Forum (Volumes 636 - 637)
Main Theme Advanced Materials Forum V
Edited by Luís Guerra ROSA and Fernanda MARGARIDO
Pages 104-110
DOI 10.4028/www.scientific.net/MSF.636-637.104
Citation Elisabete R. Silva et al., 2010, Materials Science Forum, 636-637, 104
Online since January, 2010
Authors Elisabete R. Silva, J.M. Silva, Fernando A. Costa Oliveira, M. Fatima Vaz, M. Filipa Ribeiro
Keywords Cordierite Foam, Dispersion, Fluid Dynamic, Pt-Zeolite Catalyst, VOC Combustion, Washcoating
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Reticulated cordierite foams produced by a direct foaming method were successfully washcoated with platinum-based zeolite catalysts. For comparison purposes, commercial cordierite monoliths were also washcoated. The effect of the structural properties on the fluid dynamics and catalytic behaviour for the toluene combustion were evaluated. Foam supports revealed highest performances, in terms of conversion into CO2, when compared to conventional honeycomb monoliths. The experimental results suggest that the catalytic behaviour is critically dependent on the fluid dynamics provided by structural characteristics of the supports, such as porosity, density and size of pores. The randomness and tortuosity of foams enhance reactant mixing, as it was evidenced by the higher axial and radial dispersions of the gas flow across the foam structure. This leads to better mass and heat transfers in the reaction system, thus improving the catalytic behaviour.

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