Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
권호 표지
DOI QR코드

DOI QR Code

Preferential CO Oxidation over Ce-Promoted Pt/γ-Al2O3 Catalyst

Ce가 첨가된 Pt/γ-Al2O3 촉매의 선택적 CO 산화반응 특성

  • Kim, Kihyeok (Hydrogen and Fuel Cell Department, Korea Institute of Energy Research) ;
  • Koo, Keeyoung (Hydrogen and Fuel Cell Department, Korea Institute of Energy Research) ;
  • Jung, Unho (Hydrogen and Fuel Cell Department, Korea Institute of Energy Research) ;
  • Yoon, Wanglai (Hydrogen and Fuel Cell Department, Korea Institute of Energy Research)
  • 김기혁 (한국에너지기술연구원 수소연료전지 연구단) ;
  • 구기영 (한국에너지기술연구원 수소연료전지 연구단) ;
  • 정운호 (한국에너지기술연구원 수소연료전지 연구단) ;
  • 윤왕래 (한국에너지기술연구원 수소연료전지 연구단)
  • Received : 2012.11.30
  • Accepted : 2012.12.31
  • Published : 2012.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

The effect of Ce promotion over 1wt% $Pt/{\gamma}-Al_2O_3$ catalysts on the CO conversion and $CO_2$ selectivity was investigated in preferential CO oxidation (PrOx) to reduce the CO concentration less than 10 ppm in excess $H_2$ stream for polymer electrolyte membrane fuel cell (PEMFC). Ce-promoted 1wt% $Pt/{\gamma}-Al_2O_3$ catalysts were prepared by incipient wetness impregnation method and the loading amount of Pt was fixed at 1wt%. The content of Ce promoter which has excellent oxygen storage and transfer capability due to the redox property was adjusted from 0 to 1.5wt%. Ce-promoted 1wt% $Pt/{\gamma}-Al_2O_3$ catalysts exhibit high CO conversion and $CO_2$ selectivity at low temperatures below $150^{\circ}C$ due to the improvement of reducibility of surface PtOx species compared with the 1wt% $Pt/{\gamma}-Al_2O_3$ catalyst without Ce addition. When Ce content was more than 1wt%, the catalytic activity was decreased at over $160^{\circ}C$ in PrOx because of competitive $H_2$ oxidation. As a result, 0.5wt% Ce is optimal content not only to achieve high catalytic activity and good stability at low temperatures below $150^{\circ}C$ in the presence of $CO_2$ and $H_2O$ but also to minimize the $H_2$ oxidation at high temperatures.

Keywords

References

  1. J. L. Ayastuy, M. P. Gonzalez-Marcos, M. A. Gutierrez-Oriz, "Promotion Effect of Sn in Alumina-supported Pt Catalysts for CO-PROX", Catalysis Communications, Vol. 12, 2011, pp. 895-900. https://doi.org/10.1016/j.catcom.2011.02.011
  2. A. Manasilp, E. Gulari, "Selective CO Oxidation over Pt/alumina Catalysts for Fuel Cell Applications", Applied Catalysis B:environmental, Vol. 37, 2002, pp. 17-25. https://doi.org/10.1016/S0926-3373(01)00319-8
  3. M. Echigo, T. Tabata, "A Study of CO Removal on an Activated Ru Catalyst for Polymer Electrolyte Fuel Cell Applications", Applied Catalysis A:General, Vol. 251, 2003, pp. 157-166. https://doi.org/10.1016/S0926-860X(03)00325-9
  4. J. L. Ayastuy, M. P. Gonzalez-Marcos, M. A. Gutierrez-Oriz, "Effect of Process Variables on $Pt/CeO_2$ Catalyst Behaviour for the PROX Reaction", International Journal of Hydrogen Energy, Vol. 31, 2006, pp. 2231-2242. https://doi.org/10.1016/j.ijhydene.2006.04.008
  5. J. W. Park, J. H. Jeong, W. L. Yoon, C. S. Kim, D. K. Lee, "Selective Oxidation of CO in Hydrogen-rich stream over Cu-Ce Catalyst promoted with Transition Metals", International Journal of Hydrogen Energy, Vol. 30, 2005, pp. 209-220. https://doi.org/10.1016/j.ijhydene.2004.04.016
  6. H. J. Eom, K. Y. Koo, U. H. Jung, Y. W. Rhee, W. L. Yoon, "Preparation of Highly Dispersed $Ru/{\alpha}-Al_2O_3$ Catalyst for Preferential CO Oxidation", Trans. of the Korean Hydrogen and New Energy Society, Vol. 21, 2010, pp. 390-397.
  7. C. Y. Huang, Y. Y. Chen, C. C. Su, C. F. Hsu, "The Cleanup of CO in Hydrogen for PEMFC Applications using Pt, Ru, Co, and Fe in PROX Reaction", Journal of Power Sources, Vol. 174, 2007, pp. 294-301. https://doi.org/10.1016/j.jpowsour.2007.09.017
  8. M. M. Schubert, S. Hackenberg, A. V. V. Veen, M. Muhler, V. Plzak, R. J. Behm, "CO Oxidation over Supported Gold Catalysts—"Inert" and "Active" Support Materials and Their Role for the Oxygen Supply during Reaction", Journal of Catalysis, Vol. 197, 2001, pp. 113-122. https://doi.org/10.1006/jcat.2000.3069
  9. I. H. Son, "Study of $Ce-Pt/{\gamma}-Al_2O_3$ for the Selective Oxidation of CO in $H_2$ for Application to PEFSs: Effect of Gases", Journal of Power Sources, Vol. 159, 2006, pp. 1266-1273. https://doi.org/10.1016/j.jpowsour.2005.12.014
  10. Y. Minemura, S. Ito, T. Miyao, S. Naito, K. Tomishige, K. Kunimori, "Preferential CO Oxidation Promoted by the Presence of $H_2$ over $K-Pt/Al_2O_3$", Chemical Communications, 2005, pp. 1429-1431.
  11. X. Liu, O. Korotkikh, R. Farrauto, "Selective Catalytic Oxidation of CO in $H_2$: Structural Study of Fe oxide-promoted Pt/alumina Catalyst", Applied Catalysis A: General, Vol. 226, 2002, pp. 293-303.
  12. E. Y. Ko, E. D. Park, K. W. Seo, H. C. Lee, D. H. Lee, S. H. Kim, "$Pt-Ni/{\gamma}-Al_2O_3$ Catalyst for the Preferential CO Oxidation in the Hydrogen Stream", Catalysis Letters, Vol. 110, 2006, pp. 275-279. https://doi.org/10.1007/s10562-006-0121-z
  13. J. Yan, J. Ma, P. Cao, P. Li, "Preferential Oxidation of CO in $H_2-Rich$ Gases over Co-Promoted $Pt/{\gamma}-Al_2O_3$ Catalyst", Catalysis Letters, Vol. 93, 2004, pp. 55-60. https://doi.org/10.1023/B:CATL.0000016949.72039.38
  14. S. Y. Shin, O. S. Alexeev, M. D. Amiridis, "Structure and Reactivity of $Pt-Ru/SiO_2$ Catalysts for the Preferential Oxidation of CO under Excess $H_2$", Journal of Catalysis, Vol. 243, 2006, pp. 329-339. https://doi.org/10.1016/j.jcat.2006.08.004
  15. H. S. Roh, D. W. Jeong, K. S. Kim, I. H. Eum, K. Y. Koo, W. L. Yoon, "Single Stage Water-Gas Shift Reaction over Supported Pt Catalysts", Catalysis Letters, Vol. 141, 2011, pp. 95-99. https://doi.org/10.1007/s10562-010-0480-3
  16. D. W. Jeong, J. O. Shim, W. J. Jang, H. S. Roh, "A Study of Pt/Na/CeO2 Catalysts for Single Stage Water Gas Shift Reaction", Trans. of the Korean Hydrogen and New Energy Society, Vol. 23, 2012, pp.111-116. https://doi.org/10.7316/KHNES.2012.23.2.111
  17. H. Liu, L. Ma, S. Shao, Z. Li, A. Wang, "Preferential CO Oxidation on Ce-promoted $Pt/{\gamma}-Al_2O_3$ Catalysts under $H_2-rich$ Atmosphere", Chin J. Catal., Vol. 28, 2007, pp. 1077-1082. https://doi.org/10.1016/S1872-2067(08)60008-X

Cited by

  1. A Study on Preferential CO Oxidation over Supported Pt Catalysts to Produce High Purity Hydrogen vol.24, pp.5, 2013, https://doi.org/10.7316/KHNES.2013.24.5.353