Degradation of trichloroethylene by photocatalysis in an internally circulating slurry bubble column reactor.
The effects of initial trichloroethylene (TCE) concentration, recirculating liquid flow rate and gas velocity on photodegradation of TCE have been determined in an internally circulating slurry bubble column reactor (0.15m-ID x 0.85 m-high). Titanium dioxide (TiO2) powder was employed as a photocatalyst and the optimum loading of TiO2 in the present system is found to be approximately 0.2 wt%. The stripping fraction of TCE by air flow increases but photodegradation fraction of TCE decreases with increasing the initial TCE concentration, recirculating liquid flow rate and gas velocity. The average removal efficiency of TCE is found to be approximately 97% in an internally circulating slurry bubble column reactor.
Department of Chemical and Biomolecular Engineering, Energy and Environment Research Center, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon, 305-701, South Korea.
Jin Hee
JH
Jeon
Sang Done
SD
Kim
Tak Hyoung
TH
Lim
Dong Hyun
DH
Lee
D002384:Catalysis; D010777:Photochemistry; D014025:Titanium / Q000032:analysis / Q000737:chemistry*; D014241:Trichloroethylene / Q000737:chemistry / Q000302:isolation & purification* / Q000528:radiation effects; D014466:Ultraviolet Rays; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical / Q000302:isolation & purification* / Q000528:radiation effects; D018508:Water Purification / Q000379:methods
D014874:Water Pollutants, Chemical; C009495:titanium dioxide; D014241:Trichloroethylene; D014025:Titanium