ESR study of competition between Fe3+ and Cu2+ active sites for NOx selective catalytic reduction by NH3 in Cu-Fe-Beta catalyst

被引：20

作者：

Kucherov, Alexei V. ^{[1
]}

Doronkin, Dmitry E. ^{[1
]}

Stakheev, Alexandr Yu. ^{[1
]}

Kustov, Arkady L. ^{[2
]}

Grill, Marie ^{[2
]}

机构：

[1] Russian Acad Sci, ND Zelinskii Organ Chem Inst, Moscow 119991, Russia

[2] Haldor Topsoe Res Labs, DK-2800 Lyngby, Denmark

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2010年 / 325卷 / 1-2期

关键词：

Cu-Fe-Beta; NOx-SCR; ESR; NITRIC-OXIDE; ALPHA-SITES; FE-ZSM-5; CUH-ZSM-5; N2O; STABILITY; ZEOLITE; BENZENE; FEZSM-5; COPPER;

D O I：

10.1016/j.molcata.2010.03.035

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A series of Fe-Beta catalysts modified with different amount of Cu was prepared and tested in NOx selective catalytic reduction by NH3. ESR study reveals that replacement of isolated tetrahedral Fe3+ ions by Cu2+ ions in cationic sites of the zeolite takes place upon Fe-Beta treatment by copper. This modification results in gain in deNO(x) activity in low-temperature region, due to formation of cationic Cu2+, and significant loss in activity at high temperatures, which is determined by substitution of active Fe3+ for less active Cu2+. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：73 / 78

页数：6

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