• Bulletin of the Korean Chemical Society
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• 제35권4호
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• pp.1237-1240
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• 2014

• Journal of Electrochemical Science and Technology
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• 제9권2호
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• pp.141-148
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• 2018

This study evaluated the performance characteristics of varied electrolyte species and amounts in a molten carbonate fuel cell (MCFC). Coin-type MCFCs were used at the condition of $650^{\circ}C$ and 1 atm. In order to measure the effects of varied electrolyte species and amounts, electrolytes of $(Li+K)_2CO_3$ and $(Li+Na)_2CO_3$ were selected and the amounts of 1.5 g, 2.0 g, 3.0 g, and 4.0 g were used. Insignificant performance differences were observed in the cell using different electrolytes, but the cell performance was sensitive to the amount of the electrolyte used. The pore-filling ratio (PFR), a ratio of pore filling in the components by the liquid carbonate electrolytes, was used to determine the optimum performance range. Consequently, 77% PFR demonstrated the optimum performance for both electrolytes. Thus, the MCFC had a permissible but narrow optimum performance range. The remaining amounts of electrolyte in the cells were determined using the weight reduction ratio (WRR) method after several hours of cell operation. The WRR used the relationship between the initial loaded amount of electrolyte and weight reduction of components in 10 wt% acetic acid. The relationships were linear and identical between the two electrolyte species.

• 대한안전경영과학회지
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• 제2권4호
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• pp.177-186
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• 2000

The molten carbonate fuel cell has conspicuous features and high potential in being used as an energy converter of various fuels to electricity and heat. However, the MCFC which use strongly corrosive molten carbonate at $650^{\circ}C$ have many problem. Systematic investigation on corrosion behavior of Fe/20Cr/Ti has been done in (62+38)mol % (Li+K) $CO_3$ melt at 923K by using. steady state polarization and electrochemical impedance spectroscopy method. It found that the corrosion current of these Febased alloys decreased with increasing Ti content, and this attribute to the formation of $LiCrO_2$ layer at the surface.

• 한국수소및신에너지학회논문집
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• 제10권2호
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• pp.107-118
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• 1999

MCFC 발전 기술의 실용화를 위하여 $3,000cm^2$ 면적의 단위전지 20장으로 구성된 5 kW 급 MCFC 스택을 5,760 시간 동안 운전하여 그 운전특성을 파악하였다. 스택은 7.6 kW의 출력을 보여주어 설계치보다 높은 출력을 보여주었다. 아울러 스택 성능 및 스택내 운전온도 분포변화를 해석하기 위하여 열전달, 유동방정식 및 연료전지 반응특성을 고려한 수학적 모델을 완성하였다. 완성된 수학적 모델 전산 모사를 위하여 상용 CFD 코드를 이용한 프로그램을 개발하였고 개발된 스택 전산모사 코드는 실제 운전된 5 kW MCFC 스택 운전 자료와 이론적 계산결과와 비교하여 그 신뢰성을 확인하였다.

• E2M - 전기 전자와 첨단 소재
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• 제9권8호
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• pp.851-858
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• 1996

이글에서는 다음의 내용을 다루었다. 1. MCFC발전시스템의 구성 2. MCFC발전 plant 3. MCFC의 개발상황 4. 용융탄산엽형 연료전지의 고성능화 과제

• 대한기계학회:학술대회논문집
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• 대한기계학회 2000년도 춘계학술대회논문집B
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• pp.264-269
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• 2000

As a part of the ongoing effort towards commercial application of high-temperature fuel cell power generation systems, we have recently built a pilot-scale molten carbonate fuel cell power plant and tested it. The stack test system is composed of diverse peripheral units such as reformer, pre-heater, water purifier, electrical loader, gas supplier, and recycling systems. The stack itself was made of 40cells of $6000cm^2$ area each. The stack showed an output higher than 25kW power and a reliable performance at atmospheric operation. A pressurized performance was also tested, and it turned out the cell performance increased though a few cells have shown a symptom of gas crossover. The pressurized operation characteristics could be analyzed with numerical computation results of a stack model.

• 한국표면공학회지
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• 제40권3호
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• pp.149-158
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• 2007

Of all components of MCFC(molten carbonate fuel cell), corrosion of separator is one of the most decisive factor for commercializing of MCFC. In order to provide better understanding of corrosion behavior and morphology for gas channel of separator plate, post-analysis after cell operation for 1200 hours at $650^{\circ}C$ was performed by optical microscope, SEM and EPMA. Intergranular corrosion was observed on gas channel of separator plate. Corrosion product layer was identified as Fe-oxide, Cr-oxide and Ni-oxide by EPMA, and oxide thickness was measured with a $60{\mu}m-150{\mu}m$. Also, gas channel of separator was damaged by severe intergrannular attack with post analysis in consistent with immersion test. Moreover, pitting on the channel plate was observed with a depth of $18{\sim}24{\mu}m$. The results of immersion method are well agreement with post analysis measurements.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2010년도 추계학술대회
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• pp.261-262
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• 2010

This paper presents the design, development and performance of a power conditioning system (PCS) for application to a Molten Carbonate Fuel Cell (MCFC) for high power generation system. The controller must also supervise the total PCS operation while communicating with the fuel cell system controller. A control method for parallel operation of 250kW PCS was implemented and verified respectively. Experimental performances are compared to minimum target requirements of the PCS for MCFC respectively.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 B
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• pp.1145-1146
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• 2006

분산 형 전원 및 석탄 가스화와 연계한 복합 발전이 가능한 용융탄산염 연료전지(MCFC : Molten Carbonate Fuel Cell)는 천연가스, 석탄가스 등 다양한 연료를 사용할 수 있고, 공해요인이 적고, 높은 에너지 변환효율을 가지고 있어 전력사업 분야에 적용 가능성이 가장 큰 새로운 발전방식이다. 국내에서도 1993년부터 선도기술개발 사업의 하나로 시작하여 현재 250 kW급 발전시스템 개발 연구가 진행되고 있다. 250 kW개발 전 수행한 100 kW급 MCFC 발전 시스템 개발 연구에서는 6,000cm2 급 단위전지 90장으로 구성된 50 kW급 MCFC 스택 2기 로 구성된 100 kW MCFC 스택과 이를 운전 평가를 위한 시스템을 완성하였다. 2005년부터 스택운전에 필요한 시스템 내 단위기기들에 대한 시운전을 진행 한 후 장착된 100 kW MCFC 스택 운전에서는 시스템 단위 기기의 고장으로 전 부하운전을 실시하지 못했지만 상압 상태에서 AC 50 kW 전력을 계통과 연계 운전 시험을 진행하였다. 향후 100 kW MCFC 시스템 보완후 재 운전 시험을 진행할 예정이다. 한편 병행하여 진행되는 250 kW 열병합 발전 시스템 개발에서는 시스템 상세설계 및 신형 분리판을 이용한 새로운 형태의 스택을 개발 운전시험을 진행하고 있다. 여기에서는 MCFC 발전 시스템의 개요와 시스템의 운전을 위한 운전 모드 그리고 스택 운전 내용을 요약하여 소개하고자 한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 하계학술대회 논문집 A
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• pp.100-103
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• 1997

Korea Electric Power Corporation (KEPCO) started a fuel cell project to develop alternative sources of electric power because of the rapid increase in power demand and global environmental problems. For the development of a molten carbonate fuel cell (MCFC), KEPCO started the project in 1993 to develop a 2 kW MCFC system and finished it at the end of 1996. In this project, $ASPEN^+$ was utilized to design the 2 kW MCFC generation system. Based on this simulation, a power generation system was designed and installed for operation and a long term test of internally manifolded 2 kW class MCFC stack. This stack has 20 cells with an effective electrode area of $1000\;cm^2$. It was run at 0.84 V and $150\;mA/cm^2$ and was operated for more than 3,250 hours continuously. This paper describes the system configuration and its control and measurement units. An analysis of the stack performance, the effect of gas utilization ratio, and the stack performance requirements are also discussed.