Development of new vanadium-based oxide catalysts for decomposition of chlorinated aromatic pollutants

Supported transition metal oxides and vanadium-containing multi-metallic oxides were investigated to develop new catalysts for the catalytic destruction of highly toxic polychlorinated aromatic pollutants such as polychlorinated benzenes, polychlorinated dibenzo-p-dioxins (PCDDs), dibenzofurans (PCDFs), and/or biphenyls (PCBs) from waste gases. The decomposition of 1,2-dichlorobenzene (Cl(2)Bz) was chosen as a model reaction. Titanic-supported vanadium catalyst (VOx/TiO2) showed the highest activity and stability among the binary oxides tested even in the presence of water vapor. The optimum loading of vanadia was 5 wt %, corresponding to half a monolayer, suggesting that the active species are tetrahedral vanadyl species on titanic. Characterizations of the VOx/TiO2 catalysts were carried out with XRD, laser Roman spectroscopy, and TPR. Multi-metallic VOx/TiO2 catalysts prepared by incorporating Mo, W, or Cr showed enhanced activities for Cl(2)Bz oxidation. Among the tested catalysts, V-Mo-O-x/TiO2 catalysts wash-coated on the cordierite honeycomb showed a good activity for the decomposition of the toxic PCDDs/PCDFs in the flue gas emitted from a municipal solid waste incinerator (MSWI).
Publisher
AMER CHEMICAL SOC
Issue Date
2002-01
Language
ENG
Keywords

TEMPERATURE-PROGRAMMED REDUCTION; WASTE INCINERATION FACILITIES; VOLATILE ORGANIC-COMPOUNDS; TOTAL OXIDATION; HYDROCARBONS; COMBUSTION; DESTRUCTION; PLATINUM; CHLORIDE; ALUMINA

Citation

ENVIRONMENTAL SCIENCE & TECHNOLOGY, v.36, no.7, pp.1600 - 1606

ISSN
0013-936X
DOI
10.1021/es015687h
URI
http://hdl.handle.net/10203/3727
Appears in Collection
CBE-Journal Papers(저널논문)
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