第74回セラミックスセミナー
日 時:2008年 6月 2日(月)11:00~12:00
場 所:南7号館 1階 101会議室
講 師:Prof. Fatih Dogan (Missouri University of Science and Technology, U.S.A)
講演題目:「Recent Developments on Single-Chamber Solid Oxide Fuel Cells」
講演内容:
A single-chamber solid oxide fuel cell (SC- SOFC), operating in a mixture of fuel and oxidant gases, provides several advantages over the conventional SOFC such as simplified cell structure (no sealing required). SC-SOFC allows using variety of fuels without carbon deposition by selecting appropriate electrode materials and cell operating conditions. Operating conditions of single chamber SOFC was studied using hydrocarbon-air gas mixtures for a cell composed of NiO-YSZ / YSZ / LSCF-Ag. The cell performance and catalytic activity of the anode was measured at various gas flow rates. The results showed that the open-circuit voltage and the power density increased as the gas flow rate increased. Relatively high power densities up to 660 mW/cm2 were obtained in a SC-SOFC using porous YSZ electrolytes instead of dense electrolytes required for operation of a double chamber SOFC. In addition to propane- or methane-air mixtures as a fuel source, the cells were also tested in a double chamber configuration using hydrogen-air mixtures by controlling the hydrogen/air ratio at the cathode and the node. Simulation of single chamber conditions in double chamber configurations allows distinguishing and better understanding of the electrode reactions in the presence of mixed gases. Recent research efforts; the effect of hydrogen-air mixtures, as fuel source, on the performance of anode and cathode materials in single-chamber and double-chamber SOFC configurations will be presented.
問合せ先:篠崎和夫,内線: 2518