Resistance to sulfidation of the catalytic reduction of NOx over Ag/Al2O3 by controlling the loadings of Ag and Ag+

被引：14

作者：

Ke, Rui ^{[1
]}

Chen, Qiang

Li, Junhua

Zhu, Yongqing

Hao, Jiming

机构：

[1] Tsinghua Univ, Dept Mech Engn, Beijing, Peoples R China

[2] Tsinghua Univ, Dept Environm Sci & Engn, Beijing 100084, Peoples R China

来源：

CATALYSIS COMMUNICATIONS | 2007年 / 8卷 / 03期

基金：

中国国家自然科学基金;

关键词：

non-thermal plasma; selective catalytic reduction; lean burn; NOx; Ag/gamma-Al2O3; propene;

D O I：

10.1016/j.catcom.2006.05.015

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：

SO2 strongly decreased the catalytic activities of low loading Ag/Al2O3 below 500 degrees C in selective catalytic reduction (SCR) of NOx by propene with or without the assistance of non-thermal plasma (NTP), which was mainly attributed to the competition between SO2 and NO. By controlling the loadings of Ag and Ag+ over alumina, the resistance of SO2 was remarkably enhanced between 400 degrees C and 500 degrees C in thermal SCR. In the NTP-assisted SCR, most of the NOx conversions were also apparently recovered from 250 degrees C to 500 degrees C. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：589 / 592

页数：4

共 9 条

[1]

AARDAHL CL, 2004, P 13 INT C CAT 11 16

[2] On the nature of the silver phases of Ag/Al2O3 catalysts for reactions involving nitric oxide [J].

Bogdanchikova, N ;

Meunier, FC ;

Avalos-Borja, M ;

Breen, JP ;

Pestryakov, A .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2002, 36 (04) :287-297

[3] A review of the selective reduction of NOx, with hydrocarbons under lean-burn conditions with non-zeolitic oxide and platinum group metal catalysts [J].

Burch, R ;

Breen, JP ;

Meunier, FC .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2002, 39 (04) :283-303

[4] The effect of sulphur on the reduction of NO by C3H6 and C3H8 over Pt/Al2O3 under lean-burn conditions [J].

Burch, R ;

Watling, TC .

APPLIED CATALYSIS B-ENVIRONMENTAL, 1998, 17 (1-2) :131-139

[5] Plasma catalytic hybrid processes: gas discharge initiation and plasma activation of catalytic processes [J].

Hammer, T ;

Kappes, T ;

Baldauf, M .

CATALYSIS TODAY, 2004, 89 (1-2) :5-14

[6]

HE Z, 1987, THEORY HARD SOFT ACI

[7] Effect of ex situ treatments with SO2 on the activity of a low loading silver-alumina catalyst for the selective reduction of NO and NO2 by propene [J].

Meunier, FC ;

Ross, JRH .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2000, 24 (01) :23-32

[8] Effect of SO2 on the activity of Ag/γ-Al2O3 catalysts for NOx reduction in lean conditions [J].

Park, PW ;

Boyer, CL .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2005, 59 (1-2) :27-34

[9] Mechanism of the selective catalytic reduction of NOx by C2H5OH over Ag/Al2O3 [J].

Yu, YB ;

He, H ;

Feng, QC ;

Gao, HW ;

Yang, X .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2004, 49 (03) :159-171

← 1 →