• 청정기술
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• 제20권1호
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• pp.88-94
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• 2014

경유는 연료전지 시스템의 연료원으로써 주목받고 있는 탄화수소 액체연료 중 하나로, 연료개질 촉매와 연료전지의 전극재료를 피독시키는 황화합물을 포함하고 있어 탈황공정이 필요한 것으로 여겨지고 있다. 다양하고도 대안적인 탈황기술이 연구되고 있으나, 초저유황 경유의 탈황 연구는 여전히 부진한 실정이다. 본 연구는 용융탄산염 연료전지 시스템에 응용될 수 있는 원료인 상용초저유황 경유의 탈황에 관한 것이다. 여기서 초저유황의 흡착탈황을 위한 흡착제로 활성탄, 제올라이트, 금속산화물 계 상용흡착제 후보군이 선정되었고 유망한 탈황제를 찾기 위한 스크리닝 평가를 실시하였다. 그 결과 초저유황 경유의 황농도를 0.1 ppmw 수준까지 떨어뜨리기 위한 흡착제 종류로 금속산화물계가 매우 유용하며, 활성탄과 제올라이트 흡착제는 같은 실험조건에서 해당 수준의 황 농도에 이르지 못하는 것으로 나타났다.

• International Journal of Naval Architecture and Ocean Engineering
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• 제3권2호
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• pp.141-149
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• 2011

The world is facing a challenge in meeting its needs for energy. Global energy consumption in the last halfcentury has increased very rapidly and is expected to continue to grow over the next 50 years. However, it is expected to see significant differences between the last 50 years and the next. This paper aims at introducing a good solution to replace or work with conventional marine power plants. This includes the use of fuel cell power plant operated with hydrogen produced through water electrolysis or hydrogen produced from natural gas, gasoline, or diesel fuels through steam reforming processes to mitigate air pollution from ships.

• 한국세라믹학회지
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• 제43권12호
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• pp.812-822
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• 2006

This study amis to investigate the functional analysis of anode and cathode materials in Anode supported Solid Oxide Fuel Cell. The concentration polarization of single cell was investigated with CFD (Computational Fluid Dynamics) method for the case of the different morphology by using four types of unit cell and discussed to reduce the concentration polarization. The concentration polarization at anode side effected the voltage loss in Anode supported Solid Oxide Fuel Cell and increased contact areas between fuel gas and anode side could reduce the concentration polarization. For intermediate temperature operation, Anode-supported single cells with thin electrolyte layer of YSZ (Yttria-Stabilized Zirconia) were fabricated and short stacks were built and evaluated. We also developed diesel and methane autothermal reforming (ATR) reactors in order to provide fuels to SOFC stacks. Influences of the $H_2O/C$ (steam to carbon ratio), $O_2/C$ (oxygen to carbon ratio) and GHSV (Gas Hourly Space Velocity) on performances of stacks have been investigated. Performance of the stack operated with a diesel reformer was lower than with using hydrogen as a fuel due to lower Nernst voltage and carbon formation at anode side. The stack operated with a natural gas reformer showed similar performances as with using hydrogen. Effects of various reformer parameters such as $H_2O/C$ and $O_2/C$ were carefully investigated. It is found that $O_2/C$ is a sensitive parameter to control stack performance.