前驱物对Mn-Ce/Ti-PILC低温SCR脱硝的影响

杨晓燕; 沈伯雄; 马宏卿; 刘亭; 左琛

前驱物对Mn-Ce/Ti-PILC低温SCR脱硝的影响

南开大学环境科学与工程学院, 天津 300071

基金项目: 国家自然科学基金(50976050, 51176077);环保公益性行业科研专项经费(201109004)。

详细信息

通讯作者:
沈伯雄, 教授, 研究方向为烟气净化与固体废物处理。 Tel:022-23503219; E-mail:shenbx@nankai.edu.cn。

中图分类号: X701
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出版历程
- 收稿日期: 2011-01-17
- 修回日期: 2011-04-22
- 刊出日期: 2012-01-31

Study on the effect of Mn-Ce/Ti-PILC on low temperature SCR activity prepared with different precursors

College of Environmental Science and Engineering, Nankai University, Tianjin 300071

摘要

摘要: 分别采用TiCl₄和钛酸丁酯为Ti前驱物制备了钛基交联黏土(Ti-PILC),通过浸渍法将锰铈负载于Ti-PILC上,制得催化剂Mn-Ce/Ti-PILCs和Mn-Ce/clay,测试了该催化剂在以氨气为还原剂的低温SCR过程中的催化活性,分析了Ti前驱物对黏土结构及催化性能的影响。XRD、BET、FT-IR、NH₃-TPD和SEM等表征结果表明,与原土(clay)相比,经钛交联柱撑后,Ti-PILC的微观结构更加合理,其比表面积和孔容都有了一定程度的增加,表面酸性有所增强。与原土负载的Mn-Ce/clay催化剂相比,Mn-Ce/Ti-PILCs的催化活性明显提高。而且,钛酸丁酯作前驱物进行交联比TiCl₄交联效果更明显,所得到的催化剂低温活性更好。
- 钛基交联黏土 /
- 选择性催化还原(SCR) /
- Mn-Ce/Ti-PILC /
- 钛前驱物 /
- 脱硝
Abstract: Titania-pillared clay (Ti-PILC) was obatined with two different Ti precursors of TiCl₄ and Ti(OC₃H₇)₄; with Ti-PILC as support, Mn-Ce/Ti-PILCs catalysts were prepared through impregnation. The catalytic activity of Mn-Ce/Ti-PILCs in low temperature SCR of NO with NH₃ was investigated. XRD, BET, FT-IR, NH₃-TPD and SEM measurements indicated that the pillaring process can change the structure of the clay; compared with the original clay, the specific surface area, the pore volume and the acidity of Ti-PILCs are increased; meanwhile, Mn-Ce/Ti-PILCs also exhibits higher catalytic activity than Mn-Ce/clay. Moreover, Ti(OC₃H₇)₄ as Ti precursor is more effective in enhancing the catalytic activity of Mn-Ce/Ti-PILCs than TiCl₄.
- titania-pillared clay /
- selective catalytic reduction (SCR) /
- Mn-Ce/Ti-PILC /
- Ti precursor /
- de-NO_x

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参考文献(16)

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