Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Effects of La addition to Ni/$CeO_2$ Methane Partial Oxidation Catalysts

메탄 부분산화반응 Ni/$CeO_2$ 촉매에 LA 첨가의 영향

  • Cheon, Han-Jin (Department of Chemical Engineering, Myongji University) ;
  • Shin, Ki-Seok (Department of Chemical Engineering, Myongji University) ;
  • Ahn, Sung-Hwan (Department of Chemical Engineering, Myongji University) ;
  • Yoon, Cheol-Hun (Department of Chemical Engineering, Myongji University) ;
  • Hahm, Hyun-Sik (Department of Chemical Engineering, Myongji University)
  • 천한진 (명지대학교 공과대학 화학공학과) ;
  • 신기석 (명지대학교 공과대학 화학공학과) ;
  • 안성환 (명지대학교 공과대학 화학공학과) ;
  • 윤철훈 (명지대학교 공과대학 화학공학과) ;
  • 함현식 (명지대학교 공과대학 화학공학과)
  • Received : 2010.01.29
  • Accepted : 2010.03.24
  • Published : 2010.03.30
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Abstract

The effects of La addition to Ni/$CeO_2$ methane partial oxidation catalysts were investigated. Catalysts were prepared by the impregnation and urea methods. In the preparation of catalysts, La content was changed from 1 wt% to 3wt%. Catalysts that contain 2wt% La showed the highest methane conversion of about 80% and CO selectivity of 84% and $H_2$ selectivity of 70%. This result may be stemmed from that, when La content is 2wt%, a fluorite oxide-type structure is well formed and carbon deposition is also decreased. Among the catalysts, 2.5wt% Ni/Ce(La)Ox showed the highest catalytic activity. From the experiment of changing reaction temperature with 2.5wt% Ni/Ce(La)Ox catalyst, it was found that the optimum reaction temperature is $750^{\circ}C$ and at this temperature methane conversion was about 90%, CO and $H_2$ selectivities were 94 and 80%, respectively.

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References

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