Fe-ZSM-5分子筛上NO和N2O吸附行为及NO助N2O催化分解机理的研究

被引:8
作者
亢红霞
郭泉辉
李建伟
李英霞
机构
[1] 北京化工大学化工资源有效利用国家重点实验室
基金
国家杰出青年科学基金;
关键词
Fe-ZSM-5; NO; N2O; NO2; 原位漫反射红外光谱;
D O I
10.15991/j.cnki.411100.2008.03.008
中图分类号
O643.3 [催化];
学科分类号
070305 [高分子化学与物理];
摘要
利用原位漫反射红外光谱法考察了NO和N2O在液相离子交换法制备的Fe-ZSM-5分子筛上的吸附行为,并对NO助N2O催化分解的机理进行了研究.结果表明,NO和N2O均可吸附在Fe-ZSM-5分子筛表面的Br nsted酸性位和价键补偿铁离子位上;且在高温下,NO和N2O均主要以价键补偿Fe离子的形式吸附在分子筛上.NO和O2在Fe-ZSM-5表面可反应生成N2O4、NO2和NO3-或NO2-;NO与N2O分解释放的O反应生成NO2,因而能起到加速N2O分解和提高Fe-ZSM-5分子筛催化活性的作用.
引用
收藏
页码:261 / 265
页数:5
相关论文
共 8 条
[1]
分子筛对NO和NO_2的吸附性能.[J].邢娜;王新平;于青;郭新闻;.催化学报.2007, 03
[2]
Effect of NO on the catalytic removal of N2O over FeZSM-5.: Friend or foe [J].
Pérez-Ramírez, J ;
Kapteijn, F .
CATALYSIS COMMUNICATIONS, 2003, 4 (07) :333-338
[3]
The surface chemistry of N2O decomposition on iron containing zeolites (I) [J].
Pirngruber, GD .
JOURNAL OF CATALYSIS, 2003, 219 (02) :456-463
[4]
The effect of NO x on the catalytic decomposition of nitrous oxide over Fe-MFI zeolites.[J]..Catalysis Communications.2001, 9
[5]
Possible role of nitrite/nitrate redox cycles in N2O decomposition and light-off over Fe-ZSM-5 [J].
Sang, CM ;
Lund, CRF .
CATALYSIS LETTERS, 2001, 73 (01) :73-77
[6]
Investigations of the State of Fe in H–ZSM-5.[J].Lisa J. Lobree;In-Chul Hwang;Jeffrey A. Reimer;Alexis T. Bell.Journal of Catalysis.1999, 2
[7]
Effect of water on the reduction of NOx with propane on Fe-ZSM-5.: An FTIR mechanistic study [J].
Hadjiivanov, K ;
Knözinger, H ;
Tsyntsarski, B ;
Dimitrov, L .
CATALYSIS LETTERS, 1999, 62 (01) :35-40
[8]
Reduction of NOx over Fe/ZSM-5 catalysts:: Adsorption complexes and their reactivity toward hydrocarbons [J].
Chen, HY ;
Voskoboinikov, T ;
Sachtler, WMH .
JOURNAL OF CATALYSIS, 1998, 180 (02) :171-183