• 제목/요약/키워드: Molten carbonate

검색결과 229건 처리시간 0.03초

Dual Phase 전도성 CO2 분리막: 메커니즘, 미세구조 및 전기전도도 (Dual Phase Conductive CO2 Membranes: Mechanism, Microstructure, and Electrical Conductivity)

  • 이시우;유지행;우상국
    • 한국세라믹학회지
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    • 제44권8호
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    • pp.424-429
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    • 2007
  • Novel conductive $CO_2$ membranes composed of dual phases, molten carbonates and electronic conducting ceramics, were investigated. As the microstructure control of electronic conducting ceramic supports is extremely important to keep the molten carbonates stable in the membranes by a capillary force applied by the pore structure of the supports, we have scrutinized the microstructure of the electronic conducting supports utilizing microscopic images and gas permeability measurement. From the evaluation of the electrical conductivities of the molten carbonates and the electronic conducting ceramic supports, we found that the ionic conductivity of the molten carbonates could determine $CO_2$ flux through the dual phase membranes if the surface exchange rate were relatively high enough.

코발트와 나이오븀이 코팅된 NiO 용융탄산염 연료전지 양극물질 특성 연구 (Characterization of (Co/Nb)-coated NiO as a Cathode Material for Molten Carbonate Fuel Cells)

  • 최희선;이철우;김건
    • 전기화학회지
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    • 제13권3호
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    • pp.203-210
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    • 2010
  • 용융탄산염 연료전지(MCFC)의 양극으로 사용되는 NiO는 $650^{\circ}C$의 용융탄산염과 산소 분위기 조건에서 안정하고 높은 전기 전도도를 가지는 장점이 있다. 그러나, 장시간 운전 시 양극에서 전해질로의 Ni dissolution은 전지 내부의 단락을 초래하여 전지의 수명을 단축시킨다. 본 연구에서는 대체 전극물질로서 코발트와 나이오븀을 코팅시킨 NiO 전극을 제조하였으며, 이렇게 제조된 전극은 기존 NiO전극과 비교하여 낮은 Ni dissolution과 안정되고 우수한 전기화학 성능을 보임을 확인하였다.

연료전지 발전을 위한 바이오가스정제 (Biogas Purifying for Fuel cell Power Plant)

  • 이종규;전재호
    • 상하수도학회지
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    • 제21권4호
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    • pp.439-444
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    • 2007
  • Using the anaerobic digester gas as a fuel, fuel cells have the potential to provide significant environmental and economic benefits. A molten carbonate fuel cell power plant was installed in the municipal sewage works of Tancheon in Seoul. The fuel cell unit operates on anaerobic digester gas and provides power and heat for the sewage works. This is the first project of its kind in Korea. This article outlines the experiences of gas purification process with planning, installation and operation. The engineering and installation phase is described regarding to the special features of digester gas, for example impurities in gas composition. Such impurities would be harmful to fuel cells. Operational results from the field test with a gas purification process plant are presented in this paper.