Effect of Cu Addition in Cu/Fe/Zr-Mixed Metal Oxide Mediums for Two-step Thermochemical Methane Reforming

2단계 열화학 메탄 개질을 위한 Cu/Fe/Zr-혼합 산화물 매체 내 Cu 첨가 효과

  • Cha, Kwang-Seo (Department of Fine Chemical Engineering and Applied Chemistry, Chungnam National University) ;
  • Kim, Hong-Soon (Department of Fine Chemical Engineering and Applied Chemistry, Chungnam National University) ;
  • Lee, Dong-Hee (Department of Fine Chemical Engineering and Applied Chemistry, Chungnam National University) ;
  • Jo, Won-Jun (R&D Division, Korea Gas Corporation) ;
  • Lee, Young-Seak (Department of Fine Chemical Engineering and Applied Chemistry, Chungnam National University) ;
  • Kim, Young-Ho (Department of Fine Chemical Engineering and Applied Chemistry, Chungnam National University)
  • 차광서 (충남대학교 공과대학 정밀응용화학과) ;
  • 김홍순 (충남대학교 공과대학 정밀응용화학과) ;
  • 이동희 (충남대학교 공과대학 정밀응용화학과) ;
  • 조원준 (한국가스공사 연구개발원) ;
  • 이영석 (충남대학교 공과대학 정밀응용화학과) ;
  • 김영호 (충남대학교 공과대학 정밀응용화학과)
  • Received : 2007.09.13
  • Accepted : 2007.10.26
  • Published : 2007.12.10

Abstract

thermochemical methane reforming consisting of two steps on Cu/Fe/Zr mixed oxide media was carried out using a fixed bed infrared reactor. In the first step, the metal oxide was reduced with methane to produce CO, $H_2$ and the reduced metal oxide in the temperature of 1173 K. In the second step, the reduced metal oxide was re-oxidized with steam to produce $H_2$ and the metal oxide in the temperature of 973 K. The reaction characteristics on the added amounts of Cu in Cu/Fe/Zr mixed oxide media and the cyclic tests were evaluated. With the increase of the added amount of Cu in Cu/Fe/Zr mixed oxide media, the conversion of $CH_4$, the selectivity of $CO_2$ and the $H_2/CO$ molar ratio were increased, while the selectivity of CO was decreased in the first step. On the other hand, the evolved amount of $H_2$ was decreased with increasing the added amount of Cu in the second step. The $Cu_xFe_{3-x}O_4/ZrO_2$ medium added with Cu of x = 0.7 showed good regeneration properties in the 10th cyclic tests indicating that the medium had high durability. In addition, the gasification of the deposited carbon in the water splitting step was promoted with the addition of Cu in the media.

Acknowledgement

Supported by : 한국가스공사 연구개발원

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