Influence of the reducing agent for lean NOx reduction over Cu-ZSM-5

被引：18
|
作者：
Erkfeldt, Sara [1 ,2 ]
Palmqvist, Anders [1 ]
Petersson, Martin [3 ]
机构：
[1] Chalmers, Competence Ctr Catalysis, SE-41296 Gothenburg, Sweden
[2] Volvo Technol Corp, SE-41288 Gothenburg, Sweden
[3] Volvo Powertrain Corp, Dept 91514, SE-40508 Gothenburg, Sweden
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2011年 / 102卷 / 3-4期
基金：
瑞典研究理事会;
关键词：
Hydrocarbon-SCR; NOx reduction; Zeolite; Alternative fuel; Dimethyl ether; Alcohol; Ether; Alkane; Reducing agent; Cu-ZSM-5; SELECTIVE CATALYTIC-REDUCTION; PROMOTED ALUMINA CATALYSTS; ENGINE EXHAUST-GAS; NITROGEN-OXIDES; EXCESS OXYGEN; NITRIC-OXIDE; EXCHANGED ZEOLITES; DIMETHYL ETHER; HYDROCARBON SPECIFICITY; ZSM-5; CATALYSTS;
D O I：
10.1016/j.apcatb.2010.12.037
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 range of ethers, alcohols and alkanes were compared as reducing agents for NOx over a Cu-ZSM-5 lean NOx catalyst. The nature of the reducing agent was found to determine the degree of NOx reduction. Methanol and DME were virtually inactive as reductants over this catalyst, while higher ethers and alcohols showed high NOx conversion. A detailed study was performed to investigate the differences. Among the studied variables, the chemical structure of the reductant was found to be especially important. Despite having a lower reducing capacity than DME, ethylene glycol was active for NOx reduction. It is concluded that a C-C bond in the reducing agent is required for lean NOx reduction over Cu-ZSM-5. The absence of this bond in DME and methanol explains their low activity for NOx reduction over this catalyst. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：547 / 554
页数：8
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