NOx storage capacity, SO2 resistance and regeneration of Pt/(Ba)/CeZr model catalysts for NOx-trap system

被引：26
|
作者：
Corbos, E. C. [1 ]
Elbouazzaoui, S. [1 ]
Courtois, X. [1 ]
Bion, N. [1 ]
Marecot, P. [1 ]
Duprez, D. [1 ]
机构：
[1] Univ Poitiers, CNRS, UMR 6503, Lab Catalyse & Chim Organ, F-86022 Poitiers, France
来源：
TOPICS IN CATALYSIS | 2007年 / 42-43卷 / 1-4期
关键词：
NOx trap; SO2; regeneration; ceria-zirconia;
D O I：
10.1007/s11244-007-0142-x
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
NOx storage capacity, sulphur resistance and regeneration of 1wt%Pt/Ce0.7Zr0.3O2 (Pt/CeZr) and 1wt%Pt/10wt%BaO/Ce0.7Zr0.3O2 (Pt/Ba/CeZr) catalysts were studied and compared to a 1wt%Pt/10wt%BaO/Al2O3 (Pt/Ba/Al) model catalyst submitted to the same treatments. Pt/Ba/CeZr presents the best NOx storage capacity at 400 degrees C in accordance with basicity measurements by CO2 TPD and Pt/CeZr shows the better performance at 200 degrees C mainly due to a low sensitivity to CO2 at this temperature. For all samples, sulphating induces a detrimental effect on NOx storage capacity but regeneration at 550 degrees C under rich conditions generally leads to the total recovery of catalytic performance. However, the nearly complete sulphur elimination is only observed on Pt/CeZr. Moreover, an oxidizing treatment at 800 degrees C leads to partial sulphates elimination on the Pt/CeZr catalyst whereas a stabilization of sulphates on Ba containing species is observed.
引用
收藏
页码：9 / 13
页数：5
相关论文
共 50 条
  • [1] NOx storage capacity, SO2 resistance and regeneration of Pt/(Ba)/CeZr model catalysts for NOx-trap system
    E. C. Corbos
    S. Elbouazzaoui
    X. Courtois
    N. Bion
    P. Marecot
    D. Duprez
    Topics in Catalysis, 2007, 42-43 : 9 - 13
  • [2] Characterisation by TPR, XRD and NOx storage capacity measurements of the ageing by thermal treatment and SO2 poisoning of a Pt/Ba/Al NOx-trap model catalyst
    Elbouazzaoui, S
    Courtois, X
    Marecot, P
    Duprez, D
    TOPICS IN CATALYSIS, 2004, 30-1 (1-4) : 493 - 496
  • [3] Characterisation by TPR, XRD and NOx storage capacity measurements of the ageing by thermal treatment and SO2 poisoning of a Pt/Ba/Al NOx-trap model catalyst
    Sanaa Elbouazzaoui
    Xavier Courtois
    Patrice Marecot
    Daniel Duprez
    Topics in Catalysis, 2004, 30-31 : 493 - 496
  • [4] Reduction of NOx over a NOx-Trap Catalyst and the Regeneration Behaviour of Adsorbed SO2
    H. Mahzoul
    P. Gilot
    J.-F. Brilhac
    B.R. Stanmore
    Topics in Catalysis, 2001, 16-17 : 293 - 298
  • [5] Reduction of NOx over a NOx-trap catalyst and the regeneration behaviour of adsorbed SO2
    Mahzoul, H
    Gilot, P
    Brilhac, JF
    Stanmore, BR
    TOPICS IN CATALYSIS, 2001, 16 (1-4) : 293 - 298
  • [6] Study on the properties of Pt/ Ba/TiCeO catalyst for NOx storage and resistance to SO2
    Xie, Ying
    Jin, Zheng-Lai
    Chen, Ying
    Ma, Yu-Gang
    Chen, Xiao-Ping
    Chen, Min-Dong
    Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology, 2011, 39 (04): : 300 - 306
  • [7] Rare earths based oxides as alternative materials to Ba in NOx-trap catalysts
    Rohart, E.
    Belliere-Baca, V.
    Yokota, K.
    Harle, V.
    Pitois, C.
    TOPICS IN CATALYSIS, 2007, 42-43 (1-4) : 71 - 75
  • [8] Rare earths based oxides as alternative materials to Ba in NOx-trap catalysts
    E. Rohart
    V. Bellière-Baca
    K. Yokota
    V. Harlé
    C. Pitois
    Topics in Catalysis, 2007, 42-43 : 71 - 75
  • [9] Catalytic decomposition/regeneration of Pt/Ba(NO3)2 catalysts:: NOx storage and reduction
    James, D
    Fourré, E
    Ishii, M
    Bowker, M
    APPLIED CATALYSIS B-ENVIRONMENTAL, 2003, 45 (02) : 147 - 159
  • [10] Nox storage mechanism over Pt-Ba/Al203 lean NOx trap catalysts.
    Nova, I
    Castoldi, L
    Lietti, L
    Tronconi, E
    Forzatti, P
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2005, 229 : U876 - U876
12345