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中文摘要：
以陶瓷为骨架,用溶胶凝胶法和浸渍法制备了V2O5-MoO3/TiO2催化剂,并用SiO2进行改性。采用浸渍法模拟碱K中毒,研究了SiO2改性前后催化剂中毒脱硝效率的变化,并通过BET、H2-TPR、NH3-TPD等技术手段对催化剂进行了表征。结果表明,加入SiO2后,催化剂的比表面积明显提高。SiO2改性后新鲜催化剂还原温度向低温方向迁移10℃左右,氧化还原能力得到了提高,其表面酸强度和酸量也得到较大的提高。反应评价结果表明,SiO2改性可以提高催化剂抗碱中毒的性能。
英文摘要：
V2O5-MoO3/ TiO2 catalyst was prepared by sol-gel and impregnation method and modified with SiO2 to improve its alkali-resistant performance.The alkali poisoning was simulated by the immersion of the catalyst in alkali salt solution.The effect of SiO2 modification on the de-NOx activity of V2O5-MoO3/ TiO2 catalyst in the selective catalytic reduction was investigated.BET,H2-TPR and NH3-TPD measurements indicated that the specific surface area,the redox ability（the reduction temperature is decreased by 10 ℃） and the acidity of the SiO2-modified V2O5-MoO3/TiO2catalyst are increased obviously.As a result,the alkali-resistant performance of V2O5-MoO3/ TiO2 catalyst was improved largely by the SiO2 modification.
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