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Received March 13, 2001
Accepted October 31, 2001
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Photochemical Heterogeneous Catalytic Reaction at Recirculated Reactor System
Department of Chemical Engineering, Pukyong National University, Busan 608-739, Korea 1Department of Environmental Engineering, Pukyong National University, Busan 608-739, Korea 2Department of Chemical Engineering, Korea University, Seoul 136-701, Korea
jhlim@pknu.ac.kr
Korean Journal of Chemical Engineering, March 2002, 19(2), 233-238(6), 10.1007/BF02698407
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Abstract
A study was undertaken to examine the possibility of combining a batch-recirculated photoreactor with a ceramic membrane filter for heterogeneous photocatalysis applications. D-cargo red GS (GS) was used as the test substrate and titanium dioxide was used as photocatalyst for this study. The dark adsorption of GS on the TiO2 particle surface was also analyzed. The adsorption trends of GS at various initial concentrations followed the Langmuir isotherm trend. The GS were decolorized from 20% to 70% by the dark adsorption with various concentrations. The photodegradation of GS after the dark adsorption showed the behavior of Langmuir-Hinshelwood model. The variation of recirculation flow rate did not much influence photocatalysis. Variation tendencies of GS concentration were almost similar after about 90 minutes illumination in spite of the flow rate change. The values of k (apparent first order rate constant) also varied with increase of the recirculation flow rate, but there were no observable significant differences between them.
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