서지주요정보
MCFC용 NiO Cathode의 Dissolution 저감 및 모델링에 관한 연구 = A study on the analysis and control NiO dissolution for MCFC
서명 / 저자 MCFC용 NiO Cathode의 Dissolution 저감 및 모델링에 관한 연구 = A study on the analysis and control NiO dissolution for MCFC / 최형준.
저자명 최형준 ; Choi, Hyung-Joon
발행사항 [대전 : 한국과학기술원, 1996].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8006606

소장위치/청구기호

학술문화관(문화관) 보존서고

DCHE 96005

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

초록정보

A stabilized NiO cathode was proposed and evaluated for the reduction of NiO dissolution in molten carbonate fuel cells. The NiO cathode was stabilized by the addition of alkaline earth oxide(MgO) to the cathode. The solubilities of NiO and stabilized NiO in alkali metal carbonate($62Li_2CO_3-38K_2CO_3$) were measured as a function of temperature, $CO_2$ and $O_2$ partial pressures. The MgO content in the stabilized NiO cathode was optimized with respect to its solubility. Conductivity of stabilized NiO cathode was measured to confirm whether stabilized NiO was electrically conductive or not. Half cell and single cell tests were also performed to evaluate the electrochemical performance of stabilized NiO cathode. From the linear sweep voltammetry and impedance test, it was confirmed that the catalytic activity of the stabilized NiO cathode for oxygen reduction should be comparable to that of the NiO cathode. In a long run operation of single cell test with a 10% MgO-stabilized cathode, a significant reduction of Ni precipitation was obtained. However, 10% addition of MgO to the NiO cathode resulted in poor mechanical strength of sintered cathode. A mathematical model was proposed to describe the NiO cathode dissolution in molten carbonate fuel cell. The Ni precipitation reaction, intra pore diffusion, migration, convection and variation of pore geometry and Ni deposition amount were considered in the model. Simulated Ni deposition amount and the position of deposition zone were in good agreement with the experimental results. Simulated deposition profiles were given to examine the effects of operating time, reaction rate and diffusion rate, initial condition of $H_2$ and $Ni^{2+}$ and tortuosity of matrix. Using the proposed model, the circuit-shorting phenomenon was explained by the composition variation of reactant between the inlet and the outlet of the gas.

서지기타정보

서지기타정보
청구기호 {DCHE 96005
형태사항 xii, 175 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : Hyung-Joon Choi
지도교수의 한글표기 : 임선기
지도교수의 영문표기 : Son-Ki Ihm
학위논문 학위논문(박사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 145-155
주제 용융탄산염 연료전지
NiO dissolution
Stabilized-NiO
알칼리토 금속산화물
MCFC
NiO dissolution
Stabilized-NiO
Alkai earth oxide
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