| Issue |
Korean Journal of Chemical Engineering,
Vol.27, No.4, 1123-1131, 2010
Vol.27, No.4, 1123-1131, 2010
Water-gas shift reaction over supported Pt and Pt-CeOx catalysts
A comparison study was performed of the water-gas shift (WGS) reaction over Pt and ceria-promoted Pt catalysts supported on CeO2, ZrO2, and TiO2 under rather severe reaction conditions: 6.7 mol% CO, 6.7 mol% CO2, and 33.2 mol% H2O in H2. Several techniques--CO chemisorption, temperature-programmed reduction (TPR), and inductively coupled plasma-atomic emission spectroscopy (ICP-AES)--were employed to characterize the catalysts.
The WGS reaction rate increased with increasing amount of chemisorbed CO over Pt/ZrO2, Pt/TiO2, and Pt-CeOx/ZrO2, whereas no such correlation was found over Pt/CeO2, Pt-CeOx/CeO2, and Pt-CeOx/TiO2. For these catalysts in the absence of any impurities such as Na+, the WGS activity increased with increasing surface area of the support, showed a maximum value, and then decreased as the surface area of the support was further increased. An adverse effect of Na+ on the amount of chemisorbed CO and the WGS activity was observed over Pt/CeO2. Pt-CeOx/TiO2 (51) showed the highest WGS activity among the tested supported Pt and Pt-CeOx catalysts. The close contact between Pt and the support or between Pt and CeOx, as monitored by H2-TPR, is closely related to the WGS activity. The catalytic stability at 583K improved with increasing surface area of the support over the CeO2- and ZrO2-supported Pt and Pt-CeOx catalysts.
[References]
- Temkin MI, Adv. Catal., 28, 173, 1979
- Newsome DS, Catal. Rev. Sci. Eng., 21, 275, 1980
- Ilinich O, Ruettinger W, Liu XS, Farrauto R, J. Catal., 247(1), 112, 2007
- Giroux T, Hwang S, Liu Y, Ruettinger W, Shore L, Appl. Catal. B: Environ., 56(1-2), 95, 2005
- Panagiotopoulou P, Kondarides DI, Catal. Today, 112(1-4), 49, 2006
- Liu XS, Ruettinger W, Xu XM, Farrauto R, Appl. Catal. B: Environ., 56(1-2), 69, 2005
- Evin HN, Jacobs G, Ruiz-Martinez J, Thomas GA, Davis BH, Catal. Lett., 120(3-4), 166, 2008
- Deng WL, Flytzani-Stephanopoulos M, Angew. Chem., 118, 2343, 2006
- Tibiletti D, Meunier FC, Goguet A, Reid D, Burch R, Boaro M, Vicario M, Trovarelli A, J. Catal., 244(2), 183, 2006
- Ricote S, Jacobs G, Milling M, Ji YY, Patterson PM, Davis BH, Appl. Catal. A: Gen., 303(1), 35, 2006
- Lee HC, Lee DH, Lim OY, Kim SH, Kim YT, Ko EY, Park ED, Stud. Surf. Sci. Catal., 167, 201, 2007
- Radhakrishnan R, Willigan RR, Dardas Z, Vanderspurt TH, AIChE J., 52(5), 1888, 2006
- Laniecki M, Ignacik M, Catal. Today, 116(3), 400, 2006
- Wang X, Gorte RJ, Wagner JP, J. Catal., 212(2), 225, 2002
- Zalc JM, Sokolovskii V, Loffler DG, J. Catal., 206(1), 169, 2002
- Iida H, Igarashi A, Appl. Catal. A: Gen., 298, 152, 2006
- Panagiotopoulou P, Christodoulakis A, Kondarides DI, Boghosian S, J. Catal., 240(2), 114, 2006
- Panagiotopoulou P, Kondarides DI, J. Catal., 267(1), 57, 2009
- Azzam KG, Babich IV, Seshan K, Lefferts L, Appl. Catal. A: Gen., 338(1-2), 66, 2008
- Kim YT, Park ED, Lee HC, Lee D, Lee KH, Appl. Catal. B: Environ., 90(1-2), 45, 2009
- Zhu XL, Hoang T, Lobban LL, Mallinson RG, Catal. Lett., 129(1-2), 135, 2009
- Gonzalez ID, Navarro RM, Wen W, Marinkovic N, Rodriguez JA, Rosa F, Fierro JLG, Catal. Today., 149, 372, 2010
- Yao HC, Yu Yao YF, J. Catal., 86, 254, 1984
- Hwang CP, Yeh CT, J. Mol. Catal. A: Chem., 112, 295, 1996
- McCabe RW, Wong C, Woo HS, J. Catal., 114, 354, 1988
- Holmgren A, Andersson B, J. Catal., 178(1), 14, 1998
- Li C, Sakata Y, Arai T, Domen K, Maruya KI, Onishi T, J.Chem. Soc. Faraday Trans.1., 85, 929, 1989
- Srinivasan R, Harris MB, Simpson SF, Davis BH, J. Mater.Res., 3, 787, 1988
- Spurr RA, Myers H, Anal. Chem., 59, 761, 1957
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