Photocatalytic Oxidation of Ethylene to CO2 and H2O on Ultrafine Powdered TiO2 Photocatalysts: Effect of the Presence of O2 and H2O and the Addition of Pt

Dal-Ryung Park; Bum-Jong Ahn; Hyung-Sang Park; Hiromi Yamashita; Masakazu Anpo

Korean Journal of Chemical Engineering, Vol.18, No.6, 930-934, November, 2001

Dal-Ryung Park^†, Bum-Jong Ahn¹, Hyung-Sang Park², Hiromi Yamashita³, and Masakazu Anpo³

Center for Gas Utilization Technology(CGUT), R&D Division, Korea Gas Cororation, 638-1, Ansan 425-790, Kynggi-Do, Korea
¹Dept. of Chemical Eng., Korea Polytechnic University, 3Ga-101, Jungwang-Dong, Shihung-City, Kyunggi-Do 429-793, Korea
²Department of Chemical Engineering, Sogang University, C.P.O. Box 1142, Seoul 121-742, Korea
³Department of Applied Chemistry, College of Engineering, Osaka Prefecture University, Gakuen-cho, Sakai, Osaka 599-8531, Japan

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The complete photocatalytic oxidation of C2H4 with O-2 into CO2 and H2O has been achieved on ultrafine powdered TiO2 photocatalysts and the addition of H2O was found to enhance the reaction. The photocatalytic reaction has been studied by IR, ESR, and analysis of the reaction products. UV irradiation of the photocatalysts at 275 K led to the photocatalytic oxidation of C2H4 with O-2 into CO2, CO, and H2O. The large surface area of the photocatalyst is one of the most important factors in achieving a high efficiency in the photocatalytic oxidation of C2H4. The photo-formed OH species as well as O-2(-) and O-3(-) anion radicals play a significant role as a key active species in the complete photocatalytic oxidation of C2H4 with O-2 into CO2 and H2O. Interestingly, small amount of Pt addition to the TiO2 photocatalyst increased the amount of selective formation of CO2 which was the oxidation product of C2H4 and O-2.

Keywords:Photocatalyst;Oxidation;Ethylene;TiO2

[References]

Anpo M, Res. Chem. Intermed., 9, 67 (1989)
Anpo M, Chiba K, Tomonari M, Coluccia S, Che M, Fox MA, Bull. Chem. Soc. Jpn., 64, 543 (1991)
Anpo M, Catal. Surv. Jpn., 1, 169 (1997)
Anpo M, Yamashita H, "Heterogeneous Photocatalysis," M. Schiavelo, Ed., Wiley, Chichester, 133 (1997)
Anpo M, Yamashita H, Ichihashi Y, Fujii Y, Honda M, J. Phys. Chem. B, 101(14), 2632 (1997)
Chai YS, Lee JC, Kim BW, Korean J. Chem. Eng., 17(6), 633 (2000)
Fox MA, Dulay MT, Chem. Rev., 93, 341 (1993)
Graf JC, "Photocatalytic Oxidation of Volatile Organic Contaminants," 5th ICES SAE 951660 (1995)
Meagher JM, Heicklen J, J. Phys. Chem., 80(15), 1645 (1976)
Kamat PV, Chem. Rev., 93, 267 (1993)
Kubokawa Y, Anpo M, Yun C, "Proceedings, 7th International Congress on Catalysis, Tokyo, 1980," Part B, Elsevier, Amsterdam, 1170 (1981)
Lee SG, Lee HI, Korean J. Chem. Eng., 15(5), 463 (1998)
Ollis DF, Al-Ekabi H, "Photocatalytic Purification and Treatment of Water and Air," Elsevier, Amsterdam (1993)
Yamashita H, Kawasaki S, Ichihashi Y, Takeuchi M, Harada M, Anpo M, Louis C, Che M, Korean J. Chem. Eng., 15(5), 491 (1998)
Yamashita H, Ichihashi Y, Harada M, Stewart G, Fox MA, Anpo M, J. Catal., 158(1), 97 (1996)

[Referenced By]

[Related Articles]

[1] Anpo M, Res. Chem. Intermed., 9, 67 (1989)

[2] Anpo M, Chiba K, Tomonari M, Coluccia S, Che M, Fox MA, Bull. Chem. Soc. Jpn., 64, 543 (1991)

[3] Anpo M, Catal. Surv. Jpn., 1, 169 (1997)

[4] Anpo M, Yamashita H, "Heterogeneous Photocatalysis," M. Schiavelo, Ed., Wiley, Chichester, 133 (1997)

[5] Anpo M, Yamashita H, Ichihashi Y, Fujii Y, Honda M, J. Phys. Chem. B, 101(14), 2632 (1997)

[6] Chai YS, Lee JC, Kim BW, Korean J. Chem. Eng., 17(6), 633 (2000)

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

[8] Graf JC, "Photocatalytic Oxidation of Volatile Organic Contaminants," 5th ICES SAE 951660 (1995)

[9] Meagher JM, Heicklen J, J. Phys. Chem., 80(15), 1645 (1976)

[10] Kamat PV, Chem. Rev., 93, 267 (1993)

[11] Kubokawa Y, Anpo M, Yun C, "Proceedings, 7th International Congress on Catalysis, Tokyo, 1980," Part B, Elsevier, Amsterdam, 1170 (1981)

[12] Lee SG, Lee HI, Korean J. Chem. Eng., 15(5), 463 (1998)

[13] Ollis DF, Al-Ekabi H, "Photocatalytic Purification and Treatment of Water and Air," Elsevier, Amsterdam (1993)

[14] Yamashita H, Kawasaki S, Ichihashi Y, Takeuchi M, Harada M, Anpo M, Louis C, Che M, Korean J. Chem. Eng., 15(5), 491 (1998)

[15] Yamashita H, Ichihashi Y, Harada M, Stewart G, Fox MA, Anpo M, J. Catal., 158(1), 97 (1996)