Photocatalytic Degradation of Gas-Phase Methanol and Toluene Using Thin-Film TiO2 Photocatalyst: II. Kinetic Study for the Effect of Initial Concentration and Photon Flux

Sang Bum Kim; Wang Seog Cha; Sung Chang Hong

Journal of Industrial and Engineering Chemistry, Vol.8, No.2, 162-167, March, 2002

Sang Bum Kim^†, Wang Seog Cha¹, and Sung Chang Hong²

Department of Chemical Engineering, Korea University, 1, 5-ka, Anam-dong, Sungbuk-ku, Seoul 136-701, Korea
¹Department of Civil and Environmental Engineering, Kunsan Nat'l University, Kunsan 573-701, Korea
²Department of Environmental Engineering, Kyonggi University, Suwon 442-760, Korea

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This paper examined the kinetics of photocatalytic degradation of volatile organic compounds (VOCs) including gaseous methanol and toluene. Variable parameters were initial concentration of methanol and toluene and photon flux of ultra-violet (UV) light. A batch photo-reactor was specifically designed for this work. The photocatalytic degradation rate increased with increasing the initial concentration of methanol and toluene, but maintained almost constant beyond a certain concentration. It, matched well with the Langmuir-Hinshelwood (L-H) kinetic model. As for the effect of photon flux, it was found that photocatalytic degradation reaction occurs in two regimes with respect to photon flux.

Keywords:kinetics of photocatalytic degradation;initial concentration;photon flux;volatile organic compounds;batch photo-reactor

[References]

EPA, Total exposure assessment methodology(TEAM) study, Report 600/6-87/002a, Environmental Protection Agency, Washington DC (1987)
Lee SB, Chung KW, Hong IK, Kim HJ, J. Ind. Eng. Chem., 7(4), 193 (2001)
Fox MA, Dulay MT, Chem. Rev., 93(1), 341 (1993)
Anpo M, Yamashita H, Matsuoka M, Park DR, Shul YG, Park SE, J. Ind. Eng. Chem., 6(2), 59 (2000)
Hong SS, Ju CS, Lim CG, Ahn BH, Lim KT, Lee GD, J. Ind. Eng. Chem., 7(2), 99 (2001)
Hoffmann MR, Martin ST, Choi WY, Bahnemann DW, Chem. Rev., 95(1), 69 (1995)
Shen TT, Schmidt CE, Card TR, Assessment and control of VOC emission from waste water treatment and disposal facilities, Van Nostrand Reinhold, New York (1993)
Peral J, Ollis DF, J. Catal., 136, 554 (1992)
Blake NR, Griffin GL, J. Phys. Chem., 92, 5697 (1988)
Suzuki K, in The first International Conference on TiO2 Photocatalytic Purification and Treatment fo Water and Air, amsterdam, New York, 421 (1993)
Ollis DF, Pelizzetti E, Serpone N, Environ. Sci. Technol., 25, 1523 (1991)
Levenspiel O, Chemical Reaction Engineering, 2nd Edn., John Wiley & Sons, Inc., New York, 70 (1972)
Wang KH, Tsai HH, Hsieh YH, Appl. Catal. B: Environ., 17(4), 313 (1998)
Jacoby WA, Blake DM, Noble RD, Koval CA, J. Catal., 157(1), 87 (1995)
Obee TN, Brown RT, Environ. Sci. Technol., 29(5), 1223 (1995)

[Referenced By]

[Related Articles]

[1] EPA, Total exposure assessment methodology(TEAM) study, Report 600/6-87/002a, Environmental Protection Agency, Washington DC (1987)

[2] Lee SB, Chung KW, Hong IK, Kim HJ, J. Ind. Eng. Chem., 7(4), 193 (2001)

[3] Fox MA, Dulay MT, Chem. Rev., 93(1), 341 (1993)

[4] Anpo M, Yamashita H, Matsuoka M, Park DR, Shul YG, Park SE, J. Ind. Eng. Chem., 6(2), 59 (2000)

[5] Hong SS, Ju CS, Lim CG, Ahn BH, Lim KT, Lee GD, J. Ind. Eng. Chem., 7(2), 99 (2001)

[6] Hoffmann MR, Martin ST, Choi WY, Bahnemann DW, Chem. Rev., 95(1), 69 (1995)

[7] Shen TT, Schmidt CE, Card TR, Assessment and control of VOC emission from waste water treatment and disposal facilities, Van Nostrand Reinhold, New York (1993)

[8] Peral J, Ollis DF, J. Catal., 136, 554 (1992)

[9] Blake NR, Griffin GL, J. Phys. Chem., 92, 5697 (1988)

[10] Suzuki K, in The first International Conference on TiO2 Photocatalytic Purification and Treatment fo Water and Air, amsterdam, New York, 421 (1993)

[11] Ollis DF, Pelizzetti E, Serpone N, Environ. Sci. Technol., 25, 1523 (1991)

[12] Levenspiel O, Chemical Reaction Engineering, 2nd Edn., John Wiley & Sons, Inc., New York, 70 (1972)

[13] Wang KH, Tsai HH, Hsieh YH, Appl. Catal. B: Environ., 17(4), 313 (1998)

[14] Jacoby WA, Blake DM, Noble RD, Koval CA, J. Catal., 157(1), 87 (1995)

[15] Obee TN, Brown RT, Environ. Sci. Technol., 29(5), 1223 (1995)