Korean Chemical Engineering Research

  • 제45권2호
  • /
  • Pages.143-148
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  • 2007
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  • 0304-128X(pISSN)
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  • 2233-9558(eISSN)
한국화학공학회 (The Korean Institute of Chemical Engineers)
권호 표지

금속이온이 담지 된 제올라이트를 이용한 도시가스 내 부취제 제거

Desulfurization of Sulfur Compounds in City-gas using Metal Salt Impregnated Zeolite

  • 송헌일 (한국에너지기술연구원 화학공정연구센터) ;
  • 고창현 (한국에너지기술연구원 화학공정연구센터) ;
  • 김재창 (경북대학교 화학공학과) ;
  • 김종남 (한국에너지기술연구원 화학공정연구센터)
  • Song, Hirn-Ill (Chemical Process Research Center, Korea Institute of Energy Research) ;
  • Ko, Chang Hyun (Chemical Process Research Center, Korea Institute of Energy Research) ;
  • Kim, Jae Chang (Department of Chemical Engineering, Kyungpook National University) ;
  • Kim, Jong-Nam (Chemical Process Research Center, Korea Institute of Energy Research)
  • 투고 : 2006.08.16
  • 심사 : 2006.10.16
  • 발행 : 2007.04.30
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초록

도시가스를 원료로 수소를 제조하여 연료전지에 활용할 경우에 도시가스에 포함된 황화합물이 개질기의 촉매와 연료전지의 전극에 독으로 작용하므로 금속이온이 담지 된 $\beta$-제올라이트(BEA)로 황화합물 흡착 제거를 수행하였다. 담지 된 금속염의 농도, 종류에 따라 파과흡착량이 달라졌으며, $AgNO_3$이 담지 된 흡착제가 실험에 사용된 흡착제 중 가장 높은 파과흡착량을 나타내었다(41.1 mg/g). 그러나 $Ni(NO_3)_2$, $Fe(NO_3)_3$, $Co(NO_3)_2$와 같은 금속염이 담지 된 BEA도 $AgNO_3/BEA$와 비교할 수준의 황화합물 흡착량을 나타냈다. $AgNO_3/BEA$ 흡착제 특성 분석과 온도 영향성 실험 및 X선 광전자 분광기(x-ray photoelectron spectroscopy, XPS) 분석을 통하여 흡착제와 황화합물 사이에 작용하는 힘은 금속이온과 황화합물간의 화학적 상호작용보다 물리적 상호작용이 우세한 것으로 나타났다.

In hydrogen production for fuel cell by reforming city-gas, sulfur compounds, odorant in city-gas, are detrimental to reforming catalyst and fuel cell electrodes. We prepared metal salt impregnated ${\beta}-zeolite(BEA)$ to remove sulfur compound in city-gas by adsorption. The sulfur breakthrough adsorption capacity was changed depending on the concentration and species of metal salt. $AgNO_3$ impregnated BEA showed the highest sulfur breakthrough capacity among adsorbents used in this experiment(41.1 mg/g). But metal salt impregnated BEA such as $Ni(NO_3)_2/BEA$, $Fe(NO_3_)_3/BEA$, $Co(NO_3)_2/BEA$ showed a certain amount of sulfur adsorption capacity comparable to $AgNO_3/BEA$. Adsorption temperature effect, desorption study, and x-ray photoelectron spectroscopy analysis revealed that the dominant interaction between metal impregnated adsorbent and sulfur compounds was not chemisorption but physisorption.

키워드

참고문헌

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