Photocatalytic degradation of hazardous air pollutants on anatase TiO{sub 2} thin films
- Univ. of Illinois, Urbana-Champaign, IL (United States)
The main objective of this research was to study the photocatalytic degradation of chloroform, pentachloroethane, trichloroethylene, and tetrachloroethylene on near-UV light illuminated TiO{sub 2} thin film immobilized inside a periodic rib-roughened annular photocatalytic reactor. Reactor influent concentrations for all compounds were in the sub-part-per-million by volume (ppmv) to low ppmv level, oxygen concentrations ranged from 100 to 160,000 ppmv, and reactor space time was 9.57 s. Experiments were performed at ambient temperature and pressure. Chloroform, pentachloroethane, trichloroethylene, and tetrachloroethylene conversion ranges observed were 10-30, 92-98, 97-99, and 70-93%, respectively. Within these ranges, conversion ratios were observed to increase with increasing oxygen concentration for all four compounds. Photocatalytic degradation at oxygen concentrations lower than approximately 10,000 ppmv resulted in the formation of chlorinated reaction products. Experiments with binary systems formed by mixing trichloroethylene with each of the other three compounds investigated revealed limited multi-component interferences only appreciable at relatively low oxygen concentrations. 20 refs., 8 figs.
- OSTI ID:
- 621369
- Report Number(s):
- CONF-960273-; TRN: 98:002183-0029
- Resource Relation:
- Conference: Air and Waste Management Association (AWMA) specialty conference on emerging solutions to VOC and air toxics control, Clearwater Beach, FL (United States), 28 Feb - 1 Mar 1996; Other Information: PBD: 1996; Related Information: Is Part Of Emerging solutions to VOC and air toxics control; PB: 457 p.
- Country of Publication:
- United States
- Language:
- English
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