On the promotion by SO2 of the SCR process over Ag/Al2O3:: influence of SO2 concentration with C3H8 versus C3H8 as reductant

被引：35

作者：

Angelidis, TN

Christoforou, S

Bongiovanni, A

Kruse, N

机构：

[1] Aristotle Univ Thessaloniki, Dept Chem, GR-54006 Thessaloniki, Greece

[2] Chem Proc Engn Res Inst, GR-57001 Thessaloniki, Greece

[3] Free Univ Brussels, B-1050 Brussels, Belgium

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2002年 / 39卷 / 03期

关键词：

selective catalytic reduction; SO2; propene; propane; Ag/gamma-Al2O3; catalyst;

D O I：

10.1016/S0926-3373(02)00086-3

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：

The catalytic reduction of NOx over 5% Ag/gamma-Al2O3 was studied in the presence of various SO2 concentrations (between 0 and 100 vppm) while using propane/propene as reductant either separately or as a mixture. A promotional effect on the catalytic activity was found for all SO2 concentrations. Propene as reductant was found to perform best. Measurements were performed for 6 h time-on-stream during which maxima in the de-NO., activity were found. While these maxima occurred at different times, they were always at the same level percentage. The results provide evidence for differences in the de-NO, mechanism when replacing propene by propane. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

收藏

页码：197 / 204

页数：8

相关论文

共 14 条

[1] Promotional effect of SO2 on the selective catalytic reduction of NOx with propane/propene over Ag/γ-Al2O3 [J].

Angelidis, TN ;

Kruse, N .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2001, 34 (03) :201-212

[2] Supported Ag catalysts for the lean reduction of NO with C3H6 [J].

Bethke, KA ;

Kung, HH .

JOURNAL OF CATALYSIS, 1997, 172 (01) :93-102

[3] A comparison of the selective catalytic reduction of NOx over Al2O3 and sulphated Al2O3 using CH3OH and C3H8 as reductants [J].

Burch, R ;

Halpin, E ;

Sullivan, JA .

APPLIED CATALYSIS B-ENVIRONMENTAL, 1998, 17 (1-2) :115-129

[4] Mechanistic considerations for the reduction of NOx over Pt/Al2O3 and Al2O3 catalysts under lean-burn conditions [J].

Burch, R ;

Sullivan, JA ;

Watling, TC .

CATALYSIS TODAY, 1998, 42 (1-2) :13-23

[5] 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

[6] A STUDY OF THE VAPOR-PHASE EPOXIDATION OF PROPYLENE AND ETHYLENE ON SILVER AND SILVER GOLD ALLOY CATALYSTS [J].

GEENEN, PV ;

BOSS, HJ ;

POTT, GT .

JOURNAL OF CATALYSIS, 1982, 77 (02) :499-510

[7] SELECTIVE REDUCTION OF NO BY HYDROCARBONS AND OXYGENATED HYDROCARBONS OVER METAL-OXIDE CATALYSTS [J].

HAMADA, H .

CATALYSIS TODAY, 1994, 22 (01) :21-40

[8] EFFECTS OF SUPPORT MATERIAL AND SULFATION ON PROPANE OXIDATION ACTIVITY OVER PLATINUM [J].

HUBBARD, CP ;

OTTO, K ;

GANDHI, HS ;

NG, KYS .

JOURNAL OF CATALYSIS, 1993, 144 (02) :484-494

[9] Study of the lean NOx reduction with C3H6 in the presence of water over silver/alumina catalysts prepared from inverse microemulsions [J].

Martínez-Arias, A ;

Fernández-García, M ;

Iglesias-Juez, A ;

Anderson, JA ;

Conesa, JC ;

Soria, J .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2000, 28 (01) :29-41

[10] 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