Photocatalytic destruction of trichloroethylene in air
Conference
·
OSTI ID:141064
- National Renewable Energy Laboratory, Golden, CO (United States)
Trichlorethylene (TCE) in air reacts in contact with irradiated TiO{sub 2} to form carbon dioxide and hydrogen chloride as well as the following products: dichloroacethylchloride, phosgene, carbon dioxide, and molecular chlorine. The stoichiometry of the reaction will be discussed and a Langmuir-Hinshelwood rate expression relating the TCE destruction rate to the partial pressures of TCE and oxygen will be presented. The reaction has been studied in both the differential and integral modes. The reaction rate and product distribution have been investigated as a function of water vapor partial pressure as well as the intensity and wavelength of the UV light. The apparatus employs annular and flat photoreactors with thin films of TiO{sub 2}. All effluent from the photoreactors flows directly into a 10 meter path length cell in an Fourier Transform Infra-Red spectrometer. This allows accurate and precise determination of reaction products (except chlorine) as evidenced by excellent carbon balances, event at very high conversions.
- OSTI ID:
- 141064
- Report Number(s):
- CONF-930304--
- Country of Publication:
- United States
- Language:
- English
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