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

页码：547 / 554

页数：8

共 46 条

[1] Mechanistic cause of hydrocarbon specificity over Cu/ZSM-5 and Co/ZSM-5 catalysts in the selective catalytic reduction of NOx
Adelman, BJ
Beutel, T
Lei, GD
Sachtler, WMH
[J]. JOURNAL OF CATALYSIS, 1996, 158 (01) : 327 - 335
[2] AHLVIK P, 2001, WELL TO WHEEL EFFICI, V85
[3] Performance of NOx reduction catalysts with simulated dimethyl ether diesel engine exhaust gas
Alam, M
Fujita, O
Ito, K
[J]. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY, 2004, 218 (A2) : 89 - 95
[4] ALAM M, 1999, SOC AUTOMOTIVE ENG, V1482, P175
[5] ALAM M, 1999, AM SOC MECH ENG, V33, P61
[6] [Anonymous], CLIMATE CHANGE 2007
[7] Reaction mechanisms of lean-burn hydrocarbon SCR over zeolite catalysts
Brosius, R
Martens, JA
[J]. TOPICS IN CATALYSIS, 2004, 28 (1-4) : 119 - 130
[8] ROLE OF PROPENE IN THE SELECTIVE REDUCTION OF NITROGEN MONOXIDE IN COPPER-EXCHANGED ZEOLITES
BURCH, R
MILLINGTON, PJ
[J]. APPLIED CATALYSIS B-ENVIRONMENTAL, 1993, 2 (01) : 101 - 116
[9] SELECTIVE CATALYTIC REDUCTION OF NITRIC-OXIDE WITH ETHANE AND METHANE ON SOME METAL EXCHANGED ZSM-5 ZEOLITES
BURCH, R
SCIRE, S
[J]. APPLIED CATALYSIS B-ENVIRONMENTAL, 1994, 3 (04) : 295 - 318
[10] The mechanism of the selective reduction of nitrogen oxides by hydrocarbons on zeolite catalysts
Cant, NW
Liu, IOY
[J]. CATALYSIS TODAY, 2000, 63 (2-4) : 133 - 146

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