The different impacts of SO2 and SO3 on Cu/zeolite SCR catalysts

被引：101

作者：

Cheng, Yisun ^{[1
]}

Lambert, Christine ^{[1
]}

Kim, Do Heui ^{[2
]}

Kwak, Ja Hun ^{[2
]}

Cho, Sung June ^{[3
,4
]}

Peden, Charles H. F. ^{[2
]}

机构：

[1] Ford Motor Co, Ford Innovat Ctr, Dearborn, MI 48124 USA

[2] Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99352 USA

[3] Chonnam Natl Univ, Dept Appl Chem Engn, Kwangju 500757, South Korea

[4] Chonnam Natl Univ, Ctr Funct Nano Fine Chem, Program BK21, Kwangju 500757, South Korea

来源：

CATALYSIS TODAY | 2010年 / 151卷 / 3-4期

关键词：

Urea SCR catalysts; Cu/zeolite; SO2 and SO3 poisoning; NOx emission control; Durability; Deactivation; ZEOLITE; REDUCTION; NO;

D O I：

10.1016/j.cattod.2010.01.013

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The different impacts of SO2 and SO3 on Cu/zeolite SCR catalysts were investigated by SCR performance tests and multiple characterization techniques including temperature programmed desorption (TPD), Xray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS). The results indicate that a larger amount of highly dispersed CuSO4 formed in the zeolite catalysts (Z-CuSO4) upon SO3 poisoning, explaining the much more significant deactivation of the Cu/zeolite catalysts that were exposed to SO3 compared to poisoning by SO2. This paper provides the first demonstration that active sites of Cu/zeolite SCR catalysts involved in the storage and removal of sulfur can react with SO2 and SO3 in very different ways. In particular, the significant differences in the extent of sulfur uptake account for the considerably different impacts of SO2 and SO3 poisoning on the performance of Cu/zeolite SCR catalysts. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：266 / 270

页数：5

共 13 条

[1]

Cavataio G., 2007011575 SAE

[2]

CHENG Y, 2008011023 SAE

[3]

CHENG Y, 2009010898 SAE

[4] Do Cu(II) ions need Al atoms in their environment to make CuSiBEA active in the SCR of NO by ethanol or propane? A spectroscopy and catalysis study [J].

Dzwigaj, Stanislaw ;

Janas, Janusz ;

Gurgul, Jacek ;

Socha, Robert P. ;

Shishido, Tetsuya ;

Che, Michel .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2009, 85 (3-4) :131-138

[5] XANES AND EXAFS ANALYSIS OF COPPER ION-EXCHANGED ZSM-5 ZEOLITE CATALYST USED FOR NITROGEN MONOXIDE DECOMPOSITION [J].

HAMADA, H ;

MATSUBAYASHI, N ;

SHIMADA, H ;

KINTAICHI, Y ;

ITO, T ;

NISHIJIMA, A .

CATALYSIS LETTERS, 1990, 5 (02) :189-196

[6] Density functional studies of adsorbates in Cu-exchanged zeolites:: model comparisons and SOx binding [J].

Hass, KC ;

Schneider, WF .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1999, 1 (04) :639-648

[7]

Lambert C., 2001013623 SAE

[8]

Lambert Christine, 2004011292 SAE

[9] A pilot plant study for selective catalytic reduction of NO by NH3 over mordenite-type zeolite catalysts [J].

Nam, IS ;

Choo, ST ;

Koh, DJ ;

Kim, YG .

CATALYSIS TODAY, 1997, 38 (02) :181-186

[10] A new active zeolite structure for the selective catalytic reduction (SCR) of nitrogen oxides:: ITQ7 zeolite -: The influence of NO2 on this reaction [J].

Palomares, AE ;

Prato, JG ;

Corma, A .

CATALYSIS TODAY, 2002, 75 (1-4) :367-371

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