OP-II-3

OP-II-12EVALUATION OF IT-SOFC REACTOR FOR METHANE PARTIALOXIDATION WITH TEMPERATURE PROGRAMMING METHODSTomohiko Tagawa 1 , Yusuke Yoshida 1 , Hiroshi Yamada 1 , Makoto Inomata 21 Department of Chemical Engineering, Nagoya University Japan, Nagoya, Japantagawa@nuce.nagoya-u.ac.jp2 AJGC corporation, JapanIntroductionHighly selective oxidation processes of methane are urgently required. Fuel cellsystem using solid oxide electrolyte attracts considerable attentions as a membranereactor for selective oxidation reactions. The molecular selective permeability ofoxygen anion through the solid oxide electrolyte membrane can reduce the oxygenproduction plant and can give high selectivity. This system can also convert theexcess heat of reaction into electricity, as is called a “Chemicals-Energy cogeneration”[1].Applied potential operation is also of recent interest [2]. For the highlyselective oxidation system, design and preparation of anode catalyst are essential[3,4]. A mist pyrolysis method is an effective method for preparation of fine anodeparticles on the surface of YSZ (Yttria Stabilized Zirconia) electrolyte [4,5]. As theoperation temperature of YSZ (= about 1300K) is much higher than the reactiontemperature of partial oxidation of methane, we have studied partial oxidation ofmethane with intermediate temperature solid oxide fuel cell (=IT-SOFC) system usingLaGaO 3 type electrolyte (=LSGM)[6]. In this study, permeation of oxygen through theIT-SOFC reactor was evaluated by means of temperature programming method.ExperimentalFigure 1 shows the schematic viewof reaction apparatus. Two ceramic tubechambers were divided byLa 0.8 Sr 0.2 Ga 0.8 Mg 0.2 O 3 (φ : 42 mm, t :0.3 mm) type electrolyte(LSGM). FusedPyrex rings placed at the both side ofelectrolyte were used as a gas seal. Onthe both side of the electrolyte surface,an anode catalyst (Ni-Li/Al 2 O 3 ) and acathode catalyst (La 0.6 Sr 0.4 CoO 3 = LSC)were prepared. Platinum mesh andplatinum wire were used to connect tocurrent meter. He (3.02×10 –5 mol/s) wasfed into the anode side and the outletGC21CH 4 976854Air31) Furnace2) Thermostat3) Digital Multi-Meter4) LSGM(electrolyte)unit with anode &cathode5) Pyrex ring6) Quartz tube7) Ceramic case8) Pt-mesh9) Outer circuitFig. 1. Experimental set up120