V2O5-WO3/TiO2-SiO2制备及其选择性催化还原脱硝活性Preparation of V2O5-WO3/TiO2-SiO2 Catalyst for Selective Catalytic Reduction of NO by NH3
黄海凤,曾立,卢晗锋,周春何,陈银飞
摘要(Abstract)：
以硫酸氧钛和硅溶胶为原料,通过共沉淀法制备得到高比表面积的TiO2-SiO2复合氧化物(Ti/Si=1:1atom),并以此复合氧化物为载体用浸渍法制备了V2O5-WO3/TiO2-SiO2脱硝催化剂,考察了催化剂脱硝性能。结果表明,TiO2-SiO2复合氧化物载体出现较多的隧道孔,提高了载体的比表面积,同时Ti元素更易分布在复合氧化物的表面。相比较于纯TiO2,以复合氧化物为载体的V2O5-WO3催化剂表现出更好的活性温度窗口,催化剂表面酸性更强,催化剂对NH3的吸附性能更好,在低的NH3/NO摩尔比情况下(0.8～1.0mol?mol?1),仍然具有较好的脱硝活性,反应温度280～350℃时,脱硝率可达到98%。
关键词(KeyWords)： 脱硝;V2O5-WO3/TiO2-SiO2催化剂;选择性催化还原
基金项目(Foundation):
作者(Author): 黄海凤,曾立,卢晗锋,周春何,陈银飞
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