中文摘要：

依次采用气相和液相浸渍的方法对商用脱硝催化剂V2O5-WO3/TiO2进行模拟砷（As）和碱金属（K）复合中毒处理，以氨水和乙二酸溶液对中毒催化剂进行了联合再生；并对中毒及再生前后的催化剂进行了表征。结果表明：控制氨的浓度为0.0015mol/L，乙二酸浓度为0.001mol/L时，再生催化剂的脱硝率在300~400℃范围内可恢复至新催化剂的94.3%~97.4%。采用氨水和乙二酸溶液联合再生可有效去除中毒催化剂表面的As和K，同时再生催化剂的比表面积和表面酸性得到恢复，且再生催化剂表面没有生成新的有害物质。

英文摘要：

The commercial denitration catalyst of V2O5-WO3/TiO2 poisoned by arsenic （As） and potassium （K） was prepared by a gas-phase impregnation method and a liquid-phase impregnation method, respectively. The regeneration of denitration catalyst of V2O5-WO3/TiO2 poisoned by As and K with ammonia and oxalic acid solutions was investigated. The structural characteristics of catalysts before and after regeneration were characterized. The results show that the regenerated catalyst regains 94.3%–97.4% at 300–400℃ when the ammonia and oxalic acid concentrations are 0.001 5mol/L and 0.001mol/L. The As and K on the surface of the poisoned catalysts can be efficiently removedvia ammonia and oxalic hybrid regeneration. The specific surface area and the Bronsted acid sites of poisoned catalysts can be restored effectively. The surface of the regenerated catalyst does not generate any harmful substances.