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Language: korean

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received August 16, 2006
Accepted October 16, 2006

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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금속이온이 담지 된 제올라이트를 이용한 도시가스 내 부취제 제거

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

송헌일 고창현 김재창¹ 김종남^†

Hirn-Ill Song Chang Hyun Ko Jae Chang Kim¹ Jong-Nam Kim^†

한국에너지기술연구원 화학공정연구센터, 305-343 대전시 유성구 장동 71-2 ¹경북대학교 화학공학과, 701-702 대구시 북구 산격동 1370

Chemical Process Research Center, Korea Institute of Energy Research, 71-2, Jang-dong, Yusung-gu, Daejeon 305-343, Korea ¹Department of Chemical Engineering, Kyungpook National University, 1370, Sankyuk-dong, Buk-gu, Daegu 702-701, Korea

jnkim@kier.re.kr

Korean Chemical Engineering Research, April 2007, 45(2), 143-148(6), NONE Epub 7 May 2007

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Abstract

도시가스를 원료로 수소를 제조하여 연료전지에 활용할 경우에 도시가스에 포함된 황화합물이 개질기의 촉매와 연료전지의 전극에 독으로 작용하므로 금속이온이 담지 된 β-제올라이트(BEA)로 황화합물 흡착 제거를 수행하였다. 담지 된 금속염의 농도, 종류에 따라 파과흡착량이 달라졌으며, AgNO3이 담지 된 흡착제가 실험에 사용된 흡착제 중 가장 높은 파과흡착량을 나타내었다(41.1 mg/g). 그러나 Ni(NO3)2, Fe(NO3)3, Co(NO3)2와 같은 금속염이 담지 된 BEA도 AgNO3/BEA와 비교할 수준의 황화합물 흡착량을 나타냈다. AgNO3/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 β-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. AgNO3 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(NO3)2/BEA, Fe(NO3)3/BEA, Co(NO3)2/BEA showed a certain amount of sulfur adsorption capacity comparable to AgNO3/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.

Keywords

Desulphurization City-Gas β-Zeolite Adsorption THT TBM

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