Active sites for NO reduction over Fe-ZSM-5 catalysts

被引：70

作者：

Schwidder, M

Kumar, MS

Brückner, A

Grünert, W

机构：

[1] Ruhr Univ Bochum, Lehrstuhl Tech Chem, D-44801 Bochum, Germany

[2] Berlin Adlershof EV, Inst Angew Chem, D-12489 Berlin, Germany

来源：

CHEMICAL COMMUNICATIONS | 2005年 / 06期

关键词：

D O I：

10.1039/b414179b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A study of Fe-ZSM-5 catalysts with variable amounts of isolated, oligomeric and heavily aggregated Fe3+ oxo sites (as evidenced by UV-Vis and EPR spectroscopic data) and their catalytic properties in the selective catalytic reduction of NO by isobutane or by NH3 is presented, which allows development of a unified concept of the active Fe sites in these reactions, according to which isolated Fe sites catalyse both SCR reactions while oligomeric sites, though also involved in the selective reduction path, limit the catalyst performance by causing the total oxidation of the reductant.

引用

收藏

页码：805 / 807

页数：3

相关论文

共 14 条

[1] Evolution of Fe species during the synthesis of over-exchanged Fe/ZSM5 obtained by chemical vapor deposition of FeCl3 [J].

Battiston, AA ;

Bitter, JH ;

de Groot, FMF ;

Overweg, AR ;

Stephan, O ;

van Bokhoven, JA ;

Kooyman, PJ ;

van der Spek, C ;

Vankó, G ;

Koningsberger, DC .

JOURNAL OF CATALYSIS, 2003, 213 (02) :251-271

[2] Identification of active sites and adsorption complexes in Fe/MFI catalysts for NOx reduction [J].

Chen, HY ;

El-Malki, EM ;

Wang, X ;

van Santen, RA ;

Sachtler, WMH .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2000, 162 (1-2) :159-174

[3] Promoted Fe/ZSM-5 catalysts prepared by sublimation:: de-NOx activity and durability in H2O-rich streams [J].

Chen, HY ;

Sachtler, WMH .

CATALYSIS LETTERS, 1998, 50 (3-4) :125-130

[4] Activity and durability of Fe/ZSM-5 catalysts for lean burn NOx reduction in the presence of water vapor [J].

Chen, HY ;

Sachtler, WMH .

CATALYSIS TODAY, 1998, 42 (1-2) :73-83

[5] Fe-ZSM-5 catalysts for the selective reduction of NO by isobutane -: The problem of the active sites [J].

Heinrich, F ;

Schmidt, C ;

Löffler, E ;

Menzel, M ;

Grünert, W .

JOURNAL OF CATALYSIS, 2002, 212 (02) :157-172

[6]

HEINRICH F, 2001, CATAL COMMUN, V2, P317, DOI DOI 10.1016/S1566-7367(01)00056-5

[7] On the nature of different iron sites and their catalytic role in Fe-ZSM-5 DeNOx catalysts:: new insights by a combined EPR and UV/VIS spectroscopic approach [J].

Kumar, MS ;

Schwidder, M ;

Grünert, W ;

Brückner, A .

JOURNAL OF CATALYSIS, 2004, 227 (02) :384-397

[8] Fe-ZSM-5 for selective catalytic reduction of NO with NH3:: a comparative study of different preparation techniques [J].

Long, RQ ;

Yang, RT .

CATALYSIS LETTERS, 2001, 74 (3-4) :201-205

[9] Selective catalytic reduction of NO by ammonia over Fe-ZSM-5 catalysts [J].

Ma, AZ ;

Grünert, W .

CHEMICAL COMMUNICATIONS, 1999, (01) :71-72

[10] Fe/ZSM-5 prepared by sublimation of FeCl3:: The structure of the Fe species as determined by IR, 27Al MAS NMR, and EXAFS spectroscopy [J].

Marturano, P ;

Drozdová, L ;

Kogelbauer, A ;

Prins, R .

JOURNAL OF CATALYSIS, 2000, 192 (01) :236-247