Enhanced Sulfur Tolerance of Ceria-Promoted NOx Storage Reduction (NSR) Catalysts: Sulfur Uptake, Thermal Regeneration and Reduction with H2(g)

被引：11
|
作者：
Say, Zafer [1 ]
Vovk, Evgeny I. [1 ,2 ]
Bukhtiyarov, Valerii I. [2 ]
Ozensoy, Emrah [1 ]
机构：
[1] Bilkent Univ, Dept Chem, Ankara, Turkey
[2] Boreskov Inst Catalysis, Novosibirsk, Russia
来源：
TOPICS IN CATALYSIS | 2013年 / 56卷 / 11期
关键词：
NSR; NOx; SOx; Sulfur poisoning; DeNO(x); Ceria; GAS-SHIFT REACTION; IN-SITU FTIR; NO(X) STORAGE; SO2; ADSORPTION; SUPPORT; PLATINUM; ALUMINA; GAMMA-AL2O3; STABILITY;
D O I：
10.1007/s11244-013-0059-5
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
SOx uptake, thermal regeneration and the reduction of SOx via H-2(g) over ceria-promoted NSR catalysts were investigated. Sulfur poisoning and desulfation pathways of the complex BaO/Pt/CeO2/Al2O3 NSR system was investigated using a systematic approach where the functional sub-components such as Al2O3, CeO2/Al2O3, BaO/Al2O3, BaO/CeO2/Al2O3, and BaO/Pt/Al2O3 were studied in a comparative fashion. Incorporation of ceria significantly increases the S-uptake of Al2O3 and BaO/Al2O3 under both moderate and extreme S-poisoning conditions. Under moderate S-poisoning conditions, Pt sites seem to be the critical species for SOx oxidation and SOx storage, where BaO/Pt/Al2O3 and BaO/Pt/CeO2/Al2O3 catalysts reveal a comparable extent of sulfation. After extreme S-poisoning due to the deactivation of most of the Pt sites, ceria domains are the main SOx storage sites on the BaO/Pt/CeO2/Al2O3 surface. Thus, under these conditions, BaO/Pt/CeO2/Al2O3 surface stores more sulfur than that of BaO/Pt/Al2O3. BaO/Pt/CeO2/Al2O3 reveals a significantly improved thermal regeneration behavior in vacuum with respect to the conventional BaO/Pt/Al2O3 catalyst. Ceria promotion remarkably enhances the SOx reduction with H-2(g).
引用
收藏
页码：950 / 957
页数：8
相关论文
共 29 条
  • [1] Enhanced Sulfur Tolerance of Ceria-Promoted NOx Storage Reduction (NSR) Catalysts: Sulfur Uptake, Thermal Regeneration and Reduction with H2(g)
    Zafer Say
    Evgeny I. Vovk
    Valerii I. Bukhtiyarov
    Emrah Ozensoy
    Topics in Catalysis, 2013, 56 : 950 - 957
  • [2] NOx storage and reduction properties of ceria-promoted lean NOx trap catalysts
    Shi, Chuan
    Ji, Yaying
    Graham, Uschi
    Jacobs, Gary
    Toops, Todd J.
    Crocker, Mark
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2011, 242
  • [3] Impact of Sulfur Poisoning on the NOx Uptake of a NOx Storage and Reduction (NSR) Model Catalyst
    Happel, Markus
    Desikusumastuti, Aine
    Sobota, Marek
    Laurin, Mathias
    Libuda, Joerg
    JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (10): : 4568 - 4575
  • [4] FTIR analysis of storage behavior and sulfur tolerance in barium-based NOx storage and reduction (NSR) catalysts
    Fanson, PT
    Horton, MR
    Delgass, WN
    Lauterbach, J
    APPLIED CATALYSIS B-ENVIRONMENTAL, 2003, 46 (02) : 393 - 413
  • [5] Studies on the regeneration of sulfur-poisoned NOX storage and reduction catalysts, including a Ba composite oxide
    Tanaka, Toshiyuki
    Amano, Kumi
    Dohmae, Kazuhiko
    Takahashi, Naoki
    Shinjoh, Hirofumi
    APPLIED CATALYSIS A-GENERAL, 2013, 455 : 16 - 24
  • [6] Impact of copper on the performance and sulfur tolerance of barium-based NOx storage-reduction catalysts
    Hammache, Sonia
    Evans, Lindsey R.
    Coker, Eric N.
    Miller, James E.
    APPLIED CATALYSIS B-ENVIRONMENTAL, 2008, 78 (3-4) : 315 - 323
  • [7] Studies on regeneration mechanism of sulfur transfer additives of FCC flue gas by H2 reduction
    Jiang, Rui-Yu
    Jing, Wei-Jian
    Shan, Hong-Hong
    Li, Chun-Yi
    Yang, Chao-He
    CATALYSIS COMMUNICATIONS, 2011, 13 (01) : 97 - 100
  • [8] Understanding the role of C3H6, CO and H2 on efficiency and selectivity of NOx storage reduction (NSR) process
    Masdrag, Liliana
    Courtois, Xavier
    Can, Fabien
    Royer, Sebastien
    Rohart, Emmanuel
    Blanchard, Gilbert
    Marecot, Patrice
    Duprez, Daniel
    CATALYSIS TODAY, 2012, 189 (01) : 70 - 76
  • [9] The effects of regeneration-phase CO and/or H2 amount on the performance of a NOx storage/reduction catalyst
    Al-Harbi, Meshari
    Epling, William S.
    APPLIED CATALYSIS B-ENVIRONMENTAL, 2009, 89 (3-4) : 315 - 325
  • [10] Sulfur Poisoning and Regeneration of NOx Storage-Reduction Cu/K2Ti2O5 Catalyst
    Wang, Qiang
    Zhu, Jiahua
    Wei, Suying
    Chung, Jong Shik
    Guo, Zhanhu
    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2010, 49 (16) : 7330 - 7335
123