Co-treatment of industrial air streams using A.O.P. and adsorption processes

Autor: P. Monneyron, A. De La Guardia, M. H. Manero, E. Oliveros, M. T. Maurette, F. Benoit-Marquié
Jazyk: angličtina
Rok vydání: 2003
Předmět:
Zdroj: International Journal of Photoenergy, Vol 5, Iss 3, Pp 167-174 (2003)
Druh dokumentu: article
ISSN: 1110-662X
1110662X
DOI: 10.1155/S1110662X03000291
Popis: Coupling adsorption with two different photochemical oxidation methods was investigated, in order to treat industrial gaseous effluents containing a low concentration of Volatile Organic Compounds (VOC). Prior to adsorption/photocatalysis cyclic study, new TiO2 based catalysts were prepared by impregnating commercial zeolites in pellets form using a sol-gel technique. Scanning Electronic Microscopy observations linked to BET and adsorption equilibrium measurements of two VOC (1-butanol or BuOH and methyl-ethyl-ketone or MEK) showed that TiO2 happened to fix on the inert binder, without significant modification of support properties. A specific diffusion cell was used to produce dilute polluted air streams for each VOC in dynamic experiments, in which adsorption and photodegradation phases were alternatively carried out. Adsorption/photocatalysis co-treatment unable the total degradation of BuOH, and the regeneration of adsorbent. When using V-UV photolysis, pure zeolites were used, irradiated at 172 nm with an xenon excimer lamp. Excellent results were observed, since a total and rapid degradation was obtained for both VOC, especially thanks to a determining role of ozone.
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