负载型钙钛矿La0.8Sr0.2MnO3/SBA-15催化燃烧甲苯的研究

任倩茹; 张泽凯; 徐彪; 陈银飞

负载型钙钛矿La_0.8Sr_0.2MnO₃/SBA-15催化燃烧甲苯的研究

浙江工业大学化学工程与材料学院工业催化学科催化反应工程研究所, 浙江杭州 310014

基金项目: 国家自然科学基金(20903080)。

详细信息

通讯作者:
陈银飞,Tel:0571-88320622,E-mail:yfchen@ziut.edu.cn。

中图分类号: O643.36
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- 被引次数: 0
出版历程
- 收稿日期: 2011-12-09
- 修回日期: 2012-02-20
- 刊出日期: 2012-09-29

Research on the supported perovskite La_0.8Sr_0.2MnO₃/SBA-15 catalyst for toluene combustion

Institute of Chemical Reaction Engineering, Department of Industry Catalysis, College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, China

摘要

摘要: 采用逐层负载-孔道内氨/水蒸气原位羟化法制备了一系列负载型钙钛矿La_0.8Sr_0.2MnO₃/SBA-15催化剂,用XRD、BET、TG-DTG、XPS、H₂-TPR等手段对催化剂的物性结构等进行了表征,并在常压连续流动固定床反应器上评价了该催化剂对甲苯催化燃烧的催化性能。结果表明,逐层负载-孔道内氨/水蒸气原位羟化法的使用有助于活性组分La_0.8Sr_0.2MnO₃进入SBA-15的孔道,并在SBA-15上形成钙钛矿结构。La_0.8Sr_0.2MnO₃/SBA-15上钙钛矿结构的形成和晶格氧的出现,可为催化剂提供较多的活性中心,有利于其催化燃烧甲苯的活性。
- 钙钛矿 /
- La_0.8Sr_0.2MnO₃ /
- SBA-15 /
- 甲苯 /
- 孔道内氨/水蒸气原位羟化法
Abstract: A series of supported perovskites La_0.8Sr_0.2MnO₃/SBA-15 catalysts were prepared by step coating NH₃/water vapor-induced internal hydrolysis method, and characterized by XRD, BET, TG-DTG, XPS and H₂-TPR. Their catalytic performances for toluene combustion were evaluated on a continuous-flow fixed-bed reactor. The results showed that step coating NH₃/water vapor-induced internal hydrolysis method is favorable for the entrance of La_0.8Sr_0.2MnO₃ into pore structure of SBA-15, and the formation of perovskites phase. The formation of perovskites crystal and lattice oxygen can provide more active sites, promote the catalytic activity of toluene combustion.
- perovskite /
- La_0.8Sr_0.2MnO₃ /
- SBA-15 /
- toluene /
- step coating NH₃/water vapor-induced internal hydrolysis

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