新型CuMn／TiO2苯类催化燃烧催化剂的研制及活性实验.pdfVIP

第 28卷第3期 环 境 科 学 学 报 V01．28．No．3 2008年3月 Acta Scientiae Circumstantiae Mar．，2008 李鹏，童志权，黄妍，等．2008．新型CuMn／TiO 苯类催化燃烧催化剂的研制及活性实验[J]．环境科学学报，28(3)：468—475 Li X N．Ji R P，Jiang B．et a1．2008．Catalytic combustion of toluene over copper—manganese catalysts supported on titanium dioxide[J]．Acta Scientiae Circumstantiae，28(3)：468—475 新型CuMn／TiO2苯类催化燃烧催化剂的研制及活性 实验 李鹏，童志权 ，黄妍，张俊丰 湘潭大学环境工程系，湘潭4lllO5 收稿13期：2007一Ol一25 修回日期：2007—06—26 录用日期：2007—12—13 摘要：采用浸渍法制备了CuMn／TiO 新型甲苯燃烧催化剂，其活性明显优于传统CuMn／~一A1 0 3和Cu—Mn复合氧化物催化剂．研究发现，载体 TiO，自身有一定催化活性，而 一A1 0 则几乎没有活性；TiO 与 Cu—Mn之间的协同作用更提高了新型催化剂的活性．XRD、LRS结果显示， CuMn／TiO，催化剂的主要活性相为铜锰尖晶石(CuMn：O )，它的存在是CuMn／TiO 催化活性优良的另一个主要原因．考察了Cu—Mn负载量、铜 锰比和焙烧温度对催化剂活性的影响，CuMn／TiO2下对甲苯的去除率达95％以上时催化床层温度为2l5 ，比CuMn／~一A1zO 3和Cu—Mn复合氧 化物对甲苯去除率达95％时分别下降了3O℃、5O℃左右． 关键词：挥发性有机物；甲苯；催化燃烧；Cu—Mn复合氧化物；尖晶石 文章编号：0253—2468(2008)03—468—08 中图分类号：X5ll 文献标识码：A Catalytic combustion of toluene over copper-manganese catalysts supported on titanium dioxide LI Peng，TONG Zhiquan ，HUANG Yan，ZHANG Junfeng Department of Environmental Engineering，Xiangtan University，Xiangtan 41 l 105 Received 25 January 2007： received in revised form 26 June 2007； accepted 13 December 2007 Abstract：A new type of TiO 2一supported Cu—Mn mixed oxides catalysts was prepared by solution impregnation and applied to the total oxidation of toluene．The catalyst was found to be more active than conventional catalysts such as CuMn／~一A12 03 and Cu—Mn mixed oxides etc．Unlike 一A12 O3， TiO，alone was found to have some activity for toluene oxidation，although its T5o is rather higher(300C)．The synergetic effect of Cu Mn and TiO2 also promoted the catalytic activity of the prepared catalysts．XRD and LRS analysis revealed that the major active material of CuMn／TiO2 is CuMn2 O4，which greatly improves the activity of CuMn／TiO2．The effects of the loading