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化工进展  2015 

Mn、Ce负载顺序对催化剂Mn-Ce/TiO2低温脱硝活性的影响

DOI: 10.16085/j.issn.1000-6613.2015.06.025, PP. 1652-1655

Keywords: 催化剂,选择催化还原,活性,负载顺序,烟气脱硝

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Abstract:

采用溶胶凝胶法制备了一系列Mn-Ce/TiO2催化剂样品,并用比表面积及孔径分析仪(BET)、X射线衍射仪(XRD)和扫描电子显微镜(SEM)等对催化剂进行了表征,考察了活性组分Mn、Ce负载顺序对催化剂结构的影响,并在固定床连续流动反应器上对其催化活性进行了评价。结果表明,催化剂晶相均为锐钛矿型结构,Mn、Ce活性组分在载体表面高度分散或形成了无定形结构;Mn、Ce同时负载时催化剂表面活性组分分布均匀,比表面积最大,为97.6m2/g,且催化剂孔径分布以中孔为主;Mn、Ce同时负载时催化剂活性最好,反应温度为200℃时,NO转化率达到90%以上。

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