中文摘要：

实验制备了陶瓷颗粒为骨架的纳米级V2O5-WO3/TiO2（C）催化剂,采用浸渍法模拟碱及碱土金属中毒,研究中毒对催化剂脱硝活性的影响,通过BET、XPS、NH3-TPD技术分析了碱及碱土金属对催化剂的失活作用.结果表明,碱及碱土金属K、Na、Ca能够明显降低催化剂脱硝活性,350℃时,K、Na中毒催化剂活性降低了约30%左右,Ca中毒催化剂降低了20%.碱及碱土金属没有改变催化剂表面物种组成,催化剂活性与催化剂表面强氨气吸附位数量具有线性关系,K、Na、Ca与催化剂表面活性酸位结合,使催化剂中毒.

英文摘要：

The nano V2O5-WO3 supported on TiO2/ceramic catalysts （V2O5-WO3/TiO2） were prepared and alkali and alkaline earth metals were added to poison them by impregnation method. The effect of impregnation on the activity of the catalysts was investigated. The catalysts were analyzed by BET,XPS and NH3-TPD measurements. The results showed that alkali and alkaline earth metals deactivated the catalysts significantly. At 350 ℃ the catalytic activity dropped about 30% when K and Na were loaded,and about 20% when Ca was loaded. Alkali and alkaline earth metals had no effect on the surface composition of the catalyst. Catalytic activities had a linear relation with the amount of the surface medium adsorption sites,the catalysts were poisoned when K,Na,Ca coordinated to the activated acid sites on the catalysts＇surface.