The influence of the preparation procedure on the storage and regeneration behavior of Pt and Ba based NOx storage and reduction catalysts

被引：40

作者：

Lindholm, Anna ^{[1
]}

Currier, Neal W. ^{[2
]}

Dawody, Jazaer ^{[1
]}

Hidayat, Arif ^{[1
]}

Li, Junhui ^{[2
]}

Yezerets, Aleksey ^{[2
]}

Olsson, Louise ^{[1
]}

机构：

[1] Chalmers, Competence Ctr Catalysis, SE-41296 Gothenburg, Sweden

[2] Cummins Inc, Columbus, IN 47201 USA

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2009年 / 88卷 / 1-2期

基金：

瑞典研究理事会;

关键词：

Preparation; Platinum; Barium; Alumina; Pt/Ba/Al; NOx storage; NOx regeneration; N2O formation; NH3; formation; REDUCING AGENT; TRAP CATALYSTS; STORED NOX; STORAGE/REDUCTION CATALYSTS; MODEL CATALYSTS; NO(X) STORAGE; FT-IR; PT/BAO/AL2O3; ADSORPTION; MECHANISM;

D O I：

10.1016/j.apcatb.2008.10.004

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 influence of the preparation procedure on the performance of NOx storage and reduction catalysts was investigated by means of flow reactor experiments. Three catalysts were examined; one Pt/Al and two Pt/Ba/Al samples. One of the Pt/Ba/Al samples was prepared with Pt impregnated on Al/Ba and one with Ba impregnated on Al/Pt. The results clearly show that the preparation procedure influences the behavior of NOx storage and reduction catalysts both during lean and rich conditions. The order of the impregnation steps is crucial especially at higher temperatures; a higher storage capacity is obtained when impregnating Al/Pt with Ba than when impregnating Al/Ba with Pt. The storage increased with as much as 54% when adding Ba in the last step. The N2O and NH3 formation is also affected by the preparation procedure; there is a clear dependency on the order of impregnation steps. Moreover, N2O is not only formed during rich conditions but also in the beginning of the lean period over the Pt/Al and Al/Pt/Ba samples. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：240 / 248

页数：9

共 44 条

[1] Influence of the type of reducing agent (H2, CO, C3H6 and C3H8) on the reduction of stored NOX in a Pt/BaO/Al2O3 model catalyst [J].

Abdulhamid, H ;

Fridell, E ;

Skoglundh, M .

TOPICS IN CATALYSIS, 2004, 30-1 (1-4) :161-168

[2] Influence of CO2 on storage and release of NOx on barium-containing catalyst [J].

Balcon, S ;

Potvin, C ;

Salin, L ;

Tempère, JF ;

Djéga-Mariadassou, G .

CATALYSIS LETTERS, 1999, 60 (1-2) :39-43

[3] Study of the effect of Ba loading for catalytic activity of Pt-Ba/Al2O3 model catalysts [J].

Castoldi, L ;

Nova, I ;

Lietti, L ;

Forzatti, P .

CATALYSIS TODAY, 2004, 96 (1-2) :43-52

[4] Ammonia is a hydrogen carrier in the regeneration of Pt/BaO/Al2O3 NOx traps with H2 [J].

Cumaranatunge, L. ;

Mulla, S. S. ;

Yezerets, A. ;

Currier, N. W. ;

Delgass, W. N. ;

Ribeiro, F. H. .

JOURNAL OF CATALYSIS, 2007, 246 (01) :29-34

[5] Platinum dispersion measurements for Pt/BaO/Al2O3, NOx storage catalysts [J].

Dawody, J ;

Eurenius, L ;

Abdulhamid, H ;

Skoglundh, M ;

Olsson, E ;

Fridell, E .

APPLIED CATALYSIS A-GENERAL, 2005, 296 (02) :157-168

[6] Role of Pt-precursor on the performance of Pt/BaCO3Al2O3-NOx storage catalysts [J].

Dawody, J ;

Skoglundh, M ;

Wall, S ;

Fridell, E .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2005, 225 (02) :259-269

[7] FT-IR study of NOX storage mechanism over Pt/BaO/Al2O3 catalysts.: Effect of the Pt-BaO interaction [J].

Elizundia, U. ;

Lopez-Fonseca, R. ;

Landa, I. ;

Gutierrez-Ortiz, M. A. ;

Gonzalez-Velasco, J. R. .

TOPICS IN CATALYSIS, 2007, 42-43 (1-4) :37-41

[8] The effects of regeneration conditions on NOx and NH3 release from NOx storage/reduction catalysts [J].

Epling, William S. ;

Yezerets, Aleksey ;

Currier, Neal W. .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2007, 74 (1-2) :117-129

[9] Further evidence of multiple NOx sorption sites on NOx storage/reduction catalysts [J].

Epling, WS ;

Parks, JE ;

Campbell, GC ;

Yezerets, A ;

Currier, NW ;

Campbell, LE .

CATALYSIS TODAY, 2004, 96 (1-2) :21-30

[10] FTIR analysis of storage behavior and sulfur tolerance in barium-based NOx storage and reduction (NSR) catalysts [J].

Fanson, PT ;

Horton, MR ;

Delgass, WN ;

Lauterbach, J .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2003, 46 (02) :393-413

← 1 2 3 4 5 →