Identification and quantification of products formed from the photocatalytic degradation of trichloroethylene vapor on TlO{sub 2} illuminated with near-UV light

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:214661

Hung, C H; Marinas, B J ^[1]

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1. Purdue Univ., West Lafayette, IN (United States)

The objectives of this study were to identify and quantify reaction products from photocatalytic degradation of trichloroethylene (TCE) vapor on the surfaces of anatase titanium dioxide (TiO{sub 2}) immobilized inside a reactor with annular configuration at ambient temperature and pressure. Ten chlorinated organic compounds including phosgene (COCl{sub 2}), 1,2-dichloroethylene (C{sub 2}H{sub 2}Cl{sub 2}), dichloroacetyl chloride (C{sub 2}HCl{sub 3}O), chloroform (CHCl{sub 3}), carbon tetrachloride (CCl{sub 4}), 1,1,2-trichloroethane (C{sub 2}H{sub 3}Cl{sub 3}), 1,1,2,2-tetrachloroethane (C{sub 2}H{sub 2}Cl{sub 4}), tetrachloroethylene (C{sub 2}O{sub 4}), pentachloroethane (C{sub 2}HCl{sub 5}), and hexachloroethane (C{sub 2}Cl{sub 4}) and two inorganic specks HCl and Cl{sub 2} were identified in the photocatalytic reactor effluent. In general, the fraction of TCE going into chlorinated organic products appeared to peak at an oxygen concentration of 150 ppmv and then to decrease at higher oxygen levels. Cl-containing products observed at high oxygen concentrations were predominately the inorganic species HCl and Cl{sub 2}.

• OSTI ID: 214661
• Report Number(s): CONF-950801--
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
36 MATERIALS SCIENCE
40 CHEMISTRY
CARBON TETRACHLORIDE
CATALYSIS
CHLORINATED ALIPHATIC HYDROCARBONS
CHLOROFORM
DECOMPOSITION
PHOSGENE
PHOTOCHEMICAL REACTIONS
REMOVAL
SURFACE PROPERTIES
SURFACES
TITANIUM OXIDES
WASTE PROCESSING