Abstract
Selective CO oxidation in the presence of excess hydrogen was studied over supported Pt catalysts promoted with various transition metal compounds such as Cr, Mn, Fe, Co, Ni, Cu, Zn, and Zr. CO chemisorption, XRD, TPR, and TPO were conducted to characterize active catalysts. Among them, Pt-Ni/γ-Al2O3 showed high CO conversions over wide reaction temperatures. For supported Pt-Ni catalysts, Alumina was superior to TiO2 and ZrO2 as a support. The catalytic activity at low temperatures increased with increasing the molar ratio of Ni/Pt. This accompanied the TPR peak shift to lower temperatures. The optimum molar ratio between Ni and Pt was determined to be 5. This Pt-Ni/γ A12O3 showed no decrease in CO conversion and CO2 selectivity for the selective CO oxidation in the presence of 2 vol% H2O and 20 vol% CO2. The bimetallic phase of Pt-Ni seems to give rise to stable activity with high CO2 selectivity in selective oxidation of CO in H2-rich stream.
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Cho, S.-H., Park, J.-S., Choi, S.-H. and Kim, S.-H., “Effect of magnesium on preferential oxidation of carbon monoxide on platinum catalyst in hydrogen-rich stream,”J. Power Sources, in press.
Korotkikh, O. and Farrauto, R., “Selective catalytic oxidation of CO in H2: fuel cell applications,”Catal. Today,62, 249 (2000).
Kwak, C., Park, T.-J. and Suh, D. J., “Preferential oxidation of carbon monoxide in hydrogen-rich gas over platinum-cobalt-alumina aerogel catalysts,”Chem. Eng. Science,60, 1211 (2005).
Kwak, C., Park, T.-J. and Suh, D. J., “Effects of sodium addition on the performance of PtCo/Al2O3 catalysts for preferential oxidation of carbon monoxide from hydrogen-rich fuels,”Appl. Catal. A,278, 181 (2005).
Lee, S. H., Han, J. and Lee, K.-Y., “Development of PROX (preferential oxidation of CO) system for 1 kWe PEMFC,”Korean J. Chem. Eng.,19, 431 (2002).
Liu, X., Korotkikh, O. and Farrauto, R., “Selective catalytic oxidation of CO in H2: structural study of Fe oxide-promoted Pt/alumina catalyst,”Appl. Catal. A,226, 293 (2002).
Manasilp, A. and Gulari E., “Selective CO oxidation over Pt/alumina catalyst for fuel cell applications,”Appl. Catal. B,37, 17 (2002).
Minemura, Y., Ito, S., Miyao, T., Naito, S., Tomishige, K. and Kunimori, K., “Preferential CO oxidation promoted by the presence of H2 over K-Pt/Al2O3,”Chem. Comm., 1429(2005).
Oh, S. H. and Sinkevitch, R. M., “Carbon monoxide removal from hydrogen-rich fuel cell feedstreams by selective catalytic oxidation,”J. Catal.,142, 254 (1993).
Pedrero, C., Waku, T. and Iglesia, E., “Oxidation of CO in H2-CO mixtures catalyzed by platinum: alkali effects on rates and selectivity,”J. Catal.,233, 242 (2005).
Shore, L. and Farrauto, R. J.,PROX catalysts, Handbook of Fuel Cells: Fundamentals Technology and Applications, Vielstich, W., Lamm, A. and Gasteiger, H. A., eds., John Wiley & Sons Ltd. (2003).
Sirijaruphan, A., Goodwin, Jr., J. G. and Rice, R. W., “Effect of Fe promotion on the surface reaction parameters of Pt/γ-Al2O3 for the selective oxidation of CO,”J. Catal.,224, 304 (2004).
Son, I. H. and Lane, A. M., “Promotion of Pt/γ-Al2O3 by Ce for preferential oxidation of CO in H2,”Catal. Lett.,76, 151 (2001).
Son, I. H., Shamsuzzoha, M. and Lane, A. M., “Promotion of Pt/γ-Al2O3 by new pretreatment for low-temperature preferential oxidation of CO in H2 for PEM fuel cells,”J. Catal.,210, 460 (2002).
Son, J.-E., “Hydrogen & fuel cell technology,”Korean Chem. Eng. Res.,42, 1 (2004).
Suh, D. J., Kwak, C., Kim, J.-H., Kwon, S.M. and Park, T.-J., “Removal of carbon monoxide from hydrogen-rich fuels by selective low-temperature oxidation over base metal added platinum catalysts,”J. Power Sources,142, 70 (2005).
Takenaka, S., Shimizu, T. and Otsuka, K., “Complete removal of carbon monoxide in hydrogen-rich gas stream through methanation over supported metal catalysts,”Imt. J. Hydrogen Energ.,29, 1065 (2004).
Watanabe, M., Uchida, H., Ohkubo, K. and Igarashi, H., “Hydrogen purification for fuel cells: selective oxidation of carbon monoxide onPt-Fe/zeolite catalysts,”Appl. Catal. B,46, 595 (2003).
Wieland, S. and Melin, T.,Membrane reactor concepts, Handbook of Fuel Cells: Fundamentals Technology and Applications, Vielstich, W., Lamm, A. and Gasteiger, H. A., eds., John Wiley & Sons Ltd. (2003).
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Ko, EY., Park, E.D., Seo, K.W. et al. Selective CO oxidation in the presence of hydrogen over supported Pt catalysts promoted with transition metals. Korean J. Chem. Eng. 23, 182–187 (2006). https://doi.org/10.1007/BF02705713
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DOI: https://doi.org/10.1007/BF02705713