Journal of Hydrogen and New Energy (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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A Study on Effect of Thermal Decomposition Products of Coal on Anodic Reactions in Direct Carbon Fuel Cell

석탄 열분해 생성물이 직접탄소연료전지에서 애노드 반응에 미치는 영향에 대한 연구

  • 이영훈 (부산대학교 기계공학과 대학원) ;
  • 엄성용 (부산대학교 기계공학과 대학원) ;
  • 안성율 (일본 전력중앙연구소) ;
  • 최경민 (부산대학교 기계공학부) ;
  • 김덕줄 (부산대학교 기계공학부)
  • Received : 2013.08.14
  • Accepted : 2013.10.31
  • Published : 2013.10.31
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Abstract

Effect of inherent volatile matters in fuels on electrochemical reactions of anode was investigated for a single direct carbon fuel cell (DCFC). Raw coals used as power source in the DCFC release light gases into the atmosphere under the operating temperature of DCFC ($700^{\circ}C$) by thermal decomposition and only char remained. These exhausted gases change the gas composition around anode and affect the electrochemical oxidation reaction of system. To investigate the effect of produced gases, comparative study was conducted between Indonesian sub-bituminous coal and its char obtained through thermal treatment, carbonizing. Maximum power density of raw coal ($52mW/cm^2$) was appeared higher than that of char ($37mW/cm^2$) because the gases produced from the raw coal during thermal decomposition gave additional positive results to electrochemical reaction of the system. The produced gases from coals were analyzed using TGA and FT-IR. The influence of volatile matters on anodic electrolyteelectrode interface was observed by the equivalent circuit induced from fitting of impedance spectroscopy data.

Keywords

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