Stability study of metal-supported solid oxide fuel cell using diesel reformate = 디젤 개질 가스로 운전되는 금속지지체형 고체산화물 연료전지의 안정성에 관한 연구

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This thesis discusses about metal-supported solid oxide fuel cell (SOFC) operation using diesel reformate. SOFC has great possibilities to make fuel cell system because of high efficiency and fuel flexibility. The majority of SOFC development has focused on ceramic-supported cells: anode-supported cells (ASCs), electrolyte-supported cells (ESCs), or cathode-supported cells (CSCs). In the cases of ASC, ESC and CSC, there are several problems remained such as mechanical strength, thermal cycling and sealing efficiency. New design of SOFC was suggested to solve those challenges, which are metal-supported cells (MSCs). MSCs have been recognized as a high-potentially commercializable technology due to their high mechanical strength and excellent sealing efficiency. Diesel is a representative of heavy hydrocarbon fuels and has many advantages, such as high hydrogen density and well infrastructure for refueling. These advantages made diesel better for various applications, such as transportation and military. Diesel reforming is also very competitive to use for SOFC as fuel processing. Diesel-driven metal-supported SOFC has some merits, which the system can be portable and have high stability and durability. The system can be applied to auxiliary power units (APUs) for transportation and military power generator. However, there have not been studied metal-supported SOFC coupled with diesel reformer. Therefore, the issues of metal-supported SOFC operation using diesel reformate were discussed, and the possible solutions were suggested in this thesis. Metal-supported cells were successfully fabricated from button size to $10vxv10 cm^2$ large sizes using high temperature sinter-joining process. The metal-supported cells show high electrochemical performance with hydrogen fuel as well as stable long-term performance. However, there was a serious problem with long-term operation when diesel reformate was supplied as fuel. The main reason of performance degradation was meta...
Advisors
Bae, Joong-Myeonresearcher배중면researcher
Description
한국과학기술원 : 기계공학전공,
Publisher
한국과학기술원
Issue Date
2011
Identifier
467601/325007  / 020093504
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 기계공학전공, 2011.2, [ vii, 74 p. ]

Keywords

Diesel reformate; Stability; Metal-supported; Solid Oxide Fuel Cell (SOFC); Metal oxidation; 금속산화; 디젤 개질 가스; 안정성; 금속지지체; 고체산화물 연료전지

URI
http://hdl.handle.net/10203/45874
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=467601&flag=dissertation
Appears in Collection
ME-Theses_Master(석사논문)
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