Improvement of SOx-resistance of silver lean-DeNOx catalysts by supporting on CeO2-containing zirconia

被引：29

作者：

Hickey, N

Fornasiero, P

Kaspar, J

Graziani, M

Martra, G

Coluccia, S

Biella, S

Prati, L

Rossi, M

机构：

[1] Univ Trieste, Dipartimento Sci Chim, I-34127 Trieste, Italy

[2] Univ Turin, Dipartimento Chim IFM, I-10125 Turin, Italy

[3] Univ Milan, Ctr CNR, Dipartimento Chim Inorgan Met Organ & Analit, I-20133 Milan, Italy

来源：

JOURNAL OF CATALYSIS | 2002年 / 209卷 / 01期

关键词：

deNO(x); catalysts; silver catalysts; sulphur poisoning; ceria-zirconia catalysts;

D O I：

10.1006/jcat.2002.3614

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 lean-deNO(x) activity of Ag/Al2O3, Ag/Ce0.16Zr0.84O2, and Ag/ZrO2 was compared. The activity data showed that by supporting Ag on ZrO2-containing supports, low-temperature deNO(x) activity is greatly improved compared to Ag/Al2O3. TEM investigation suggested that the support is at the origin of this shift of activity to low temperature rather than in the presence of large Ag particles. More important, use of Ce0.16Zr0.84O2 and ZrO2 as supports confers improved sulphur resistance compared to Al2O3-based materials in that regeneration of the SO2-poisoned catalyst may be achieved under moderate conditions. (C) 2002 Elsevier Science (USA).

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页码：271 / 274

页数：4

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