Sulfur-Resistant NO Decomposition Catalysts Derived from Co-Ca/Ti-Al Hydrotalcite-like Compounds

被引:24
作者
Cheng, Jie [1 ]
Wang, Xiaoping [1 ]
Yu, Junjie [1 ]
Hao, Zhengping [1 ]
Xu, Zhi Ping [2 ]
机构
[1] Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Beijing 100085, Peoples R China
[2] Univ Queensland, Australian Res Council, Sch Engn, Ctr Funct Nanomat, Brisbane, Qld 4072, Australia
关键词
MIXED-OXIDE CATALYSTS; IN-SITU FTIR; STORAGE CATALYST; RICH CONDITIONS; REDUCTION; ADSORPTION; SO2; ADSORPTION/DESORPTION; OXYGEN; STEPS;
D O I
10.1021/jp112031e
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
Co(1.5)M(1.5)/Al(1-x)Ti(x) hydrotalcite-like compounds (where M = Co, Ca and x = 0, 0.1) were synthesized by a constant-pH coprecipitation. The derived oxides from hydrotalcites upon calcination at 800 degrees C for 4 h were all of spinel phase without crystalline TiO(2) phase being detected. Substitution of partial Al for Ti significantly enhanced NO direct decomposition activity of these catalysts. In particular, catalyst Co(3.0)/Al(0.9)Ti(0.1)O (CATO) showed the highest NO direct decomposition percentage, up to 86% at 300 degrees C with GHSV of 30 000 h(-1) (800 ppm of NO and 8% O(2) in N(2) stream). CATO also showed the highest resistance to SO(2) poisoning to NO direct decomposition, with the activity being only reduced by 16% in the presence of 64 ppm of SO(2) in the mixed gas stream at 300 degrees C. The in-situ FT-IR spectra indicate different adsorption species over the catalysts, revealing NO surface storage/decomposition involves different adsorption reactions that determine the NO decomposition activity and resistance to SO(2) poisoning.
引用
收藏
页码:6651 / 6660
页数:10
相关论文
共 36 条
[1]   In situ FTIR study Of SO2 interaction with Pt/BaCO3/Al2O3 NOx storage catalysts under lean and rich conditions [J].
Abdulhamid, Hussam ;
Fridell, Erik ;
Dawody, Jazaer ;
Skoglundh, Magnus .
JOURNAL OF CATALYSIS, 2006, 241 (01) :200-210
[2]  
[Anonymous], 2013, HLTH ENV COMM RISKS
[3]  
Braterman P.S., 2004, Handbook of layered materials, Ed, P373
[4]   HYDROTALCITE-TYPE ANIONIC CLAYS: PREPARATION, PROPERTIES AND APPLICATIONS [J].
Cavani, F. ;
Trifiro, F. ;
Vaccari, A. .
CATALYSIS TODAY, 1991, 11 (02) :173-301
[5]  
Cotton F A, 1999, ADV INORG CHEM, P326
[6]  
CULLITY BD, 1978, ELEMENTS XRAY DIFFRA, P278
[7]   Nature of active sites in decane-SCR-NOx and NO decomposition over Cu-ZSM-5 zeolites [J].
Dedecek, Jiri ;
Capek, Libor ;
Wichterlova, Blanka .
APPLIED CATALYSIS A-GENERAL, 2006, 307 (01) :156-164
[8]   Mechanism of NOx decomposition [J].
Garin, F .
APPLIED CATALYSIS A-GENERAL, 2001, 222 (1-2) :183-219
[9]   Direct Decomposition of NO on Ba/Ba-Y-O Catalyst [J].
Goto, Kazuya ;
Matsumoto, Hiroshige ;
Ishihara, Tatsumi .
TOPICS IN CATALYSIS, 2009, 52 (13-20) :1776-1780
[10]   Direct Decomposition of NO on Ba Catalysts Supported on Ce-Fe Mixed Oxides [J].
Hong, Won-Jong ;
Iwamoto, Shinji ;
Inoue, Masashi .
CATALYSIS LETTERS, 2010, 135 (3-4) :190-196