화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.23, No.2, 182-187, March, 2006
DOI10.1007/BF02705713  Export Citation
Selective CO oxidation in the presence of hydrogen over supported Pt catalysts promoted with transition metals
Eun-Yong Ko, Eun Duck Park†, Kyung Won Seo, Hyun Chul Lee1, Doohwan Lee1, and Soonho Kim1
  • Department of Chemical Engineering, Division of Chemical Engineering and Materials Engineering, Ajou University, Wonchun-Dong Yeongtong-Gu Suwon 443-749, Korea
  • 1Energy Laboratory, Samsung Advanced Institute of Technology (SAIT), P.O. Box 111, Suwon 440-600, Korea
E-mail:
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/-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/-Al2O3 showed no decrease in CO comversion 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.
Keywords:CO Oxidation;PROX;Pt/-Al2O3;Promoter;Fuel Cell
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