Novel Anode-Supported Tubular Solid-Oxide Electrolytic Cell for Direct NO Decomposition in N₂ Environment

摘要

An anode-supported tubular solid-oxide electrolytic cell (AT-SOEC) for NO decomposition has beendesigned and fabricated successfully by dip-coating technique. The AT-SOEC comprised porous(La0.8Sr0.2)0.95MnO3 (LSM95) as anode substrate, LSM95/8 mol% yttria stabilized zirconia (8YSZ) asboth anode active layer and cathode layer, and 8YSZ as electrolyte. XRD patterns demonstrated thatLSM95 and 8YSZ had good phase stability at 1250 C and in NO atmosphere which indicated thatthey were proper electrode and electrolyte materials for NO decomposition. Electrodes with graphitepowder as pore former showed uniform porosity to promote gas transmission, and the electrolyte waswell densified with a thickness of less than 10 m after sintered at 1250 C. The designed AT-SOECwas proved to work effectively for decomposing NO (3500 ppm, balanced in N2), and results indicatedthat the decomposition rate of NO increased with temperature and current, and the maximum NOdecomposition rate (99%) was obtained at 800 C.