Performance of new Pt and Pt-Cu on hydrotalcite-derived materials for NOx storage/reduction

被引：27

作者：

Basile, F ^{[1
]}

Fornasari, G ^{[1
]}

Livi, M ^{[1
]}

Tinti, F ^{[1
]}

Trifirò, F ^{[1
]}

Vaccari, A ^{[1
]}

机构：

[1] Univ Bologna, Dipartimento Chim Ind & Mat, I-40136 Bologna, Italy

来源：

TOPICS IN CATALYSIS | 2004年 / 30-1卷 / 1-4期

关键词：

NOx storage/reduction; hydrotalcite; Pt; Cu; hydrothermal treatment; SO2; deactivation;

D O I：

10.1023/B:TOCA.0000029753.61106.ef

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A series of Pt and Pt,Cu supported catalysts was prepared by impregnation of Mg-Al supports obtained from hydrotalcite-type (HT) precursor compounds calcined at different temperatures. These NOx storage-reduction (NOxSR) catalysts show improved performances in NOx storage respect to Pt-Ba/Al2O3 NOxSR catalysts at reaction temperatures lower than 473 K. These catalysts also show improved resistance to deactivation by SO2. The co-presence of Pt and Cu (at different ratio Pt/Cu and using different impregnation methods) slightly worsens low temperature activity, but considerably promotes the resistance to deactivation after severe hydrothermal treatment and in presence of SO2. The overall Pt-Cu/HT performances are thus higher than those of the Pt-Ba/Al2O3 Toyota-type NOxSR catalysts.

引用

页码：223 / 227

页数：5

共 15 条

[1]

Anderson J., 2000, STUD SURF SCI CATAL, V130, P1331

[2]

Balduzzi L, 2001, STUD SURF SCI CATAL, V140, P67

[3]

BROGAN MS, 1998, 980933 SAE

[4] NOx storage-reduction catalysts based on hydrotalcite -: Effect of Cu in promoting resistance to deactivation [J].

Centi, G ;

Fornasari, G ;

Gobbi, C ;

Livi, M ;

Trifirò, F ;

Vaccari, A .

CATALYSIS TODAY, 2002, 73 (3-4) :287-296

[5]

ERKFELDT S, 1999, SAE PAP, P1476

[6] Novel low temperature NOx storage-reduction catalysts for diesel light-duty engine emissions based on hydrotalcite compounds [J].

Fornasari, G ;

Trifirò, F ;

Vaccari, A ;

Prinetto, F ;

Ghiotti, G ;

Centi, G .

CATALYSIS TODAY, 2002, 75 (1-4) :421-429

[7] NOx storage in barium-containing catalysts [J].

Fridell, E ;

Skoglundh, M ;

Westerberg, B ;

Johansson, S ;

Smedler, G .

JOURNAL OF CATALYSIS, 1999, 183 (02) :196-209

[8] The mechanism for NOx storage [J].

Fridell, E ;

Persson, H ;

Westerberg, B ;

Olsson, L ;

Skoglundh, M .

CATALYSIS LETTERS, 2000, 66 (1-2) :71-74

[9] NOx storage reduction catalyst for automotive exhaust with improved tolerance against sulfur poisoning [J].

Matsumoto, S ;

Ikeda, Y ;

Suzuki, H ;

Ogai, M ;

Miyoshi, N .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2000, 25 (2-3) :115-124

[10]

MONROE DR, 1992, STUDIES SURFACE SCI, V71, P593

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