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。采用浸渍法模拟碱金属中毒,研究了中毒及再生对催化剂脱硝活性的影响,运用XRD、FT-IR、H2-TPR、XPS技术表征分析了碱金属对催化剂的失活作用。实验表明,碱金属能使催化剂活性降低,钾的毒性大于钠。FT-IR结果显示,催化剂以Lewis酸作为活性酸位。H2-TPR、XPS结果表明,钾的加入降低了催化剂的氧化能力,主要影响了催化剂表面的吸附氧。采用单纯的水洗方法并不能提高催化剂活性,而酸洗再生后催化剂在较高反应温度下活性得到较好的恢复。

英文摘要：

The nano TiO2/ceramic supported V2O5-WO3 catalysts（V2O5-WO3/TiO2（C）） were prepared.Their poisoning by alkali metal（K,Na） impregnated and regeneration were investigated.The catalysts were characterized by XRD,FT-IR,H2-TPR,XPS measurements.The results indicated that the catalytic activity is decreased by adding alkali metals;potassium is more poisonous than sodium.FT-IR results suggested that Lewis acid sites in the catalysts are active in the de-NOx reaction.H2-TPR and XPS analysis revealed that potassium leads to a decrease of the surface redox ability,which may reduce the oxygen adsorption and the SCR activity of the catalyst.Washing with water can not get back the catalyst activity,suggesting that potassium is not physically deposited on the catalyst surface.The activity of the poisoned catalysts can be well regenerated by washing with sulfuric acid at high temperature.