A comparative study of Ag/Al2O3 and Cu/Al2O3 catalysts for the selective catalytic reduction of NO byC3H6

被引:70
作者
He, H [1 ]
Zhang, CB [1 ]
Yu, YB [1 ]
机构
[1] Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Beijing 100085, Peoples R China
关键词
enolic species; selective catalytic reduction of NO (SCR of NO); in situ DRIFT'S; reaction mechanism;
D O I
10.1016/j.cattod.2004.04.026
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The selective catalytic reduction (SCR) of NO by C3H6 in excess oxygen was evaluated and compared over Ag/Al2O3 and Cu/Al2O3 catalysts. Ag/Al2O3 showed a high activity for NO reduction. However, Cu/Al2O3 showed a high activity for C3H6 oxidation. The partial oxidation of C3H6 gave surface enolic species and acetate species on the Ag/Al2O3, but only an acetate species was clearly observed on the Cu/Al2O3. The enolic species is a more active intermediate towards NO + O-2 to yield-NCO species than the acetate species on the Ag/Al2O3 catalyst. The Ag and Cu metal loadings and phase changes on Al2O3 support can affect the activity and selectivity of Ag/Al2O3 and Cu/Al2O3 catalysts, but the formation of enolic species is the main reason why the activity of the Ag/Al2O3 catalyst for NO reduction is higher than that of the Cu/Al2O3 catalyst. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:191 / 197
页数:7
相关论文
共 27 条
[1]   METAL-OXIDE CATALYSTS FOR LEAN NOX REDUCTION [J].
BETHKE, KA ;
KUNG, MC ;
YANG, B ;
SHAH, M ;
ALT, D ;
LI, C ;
KUNG, HH .
CATALYSIS TODAY, 1995, 26 (02) :169-183
[2]   A review of the selective reduction of NOx, with hydrocarbons under lean-burn conditions with non-zeolitic oxide and platinum group metal catalysts [J].
Burch, R ;
Breen, JP ;
Meunier, FC .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2002, 39 (04) :283-303
[3]   Role of supported metals in the selective reduction of nitrogen monoxide with hydrocarbons over metal/alumina catalysts [J].
Hamada, H ;
Kintaichi, Y ;
Inaba, M ;
Tabata, M ;
Yoshinari, T ;
Tsuchida, H .
CATALYSIS TODAY, 1996, 29 (1-4) :53-57
[4]   Catalytic performance of silver- and indium-supported TiO2-ZrO2 binary oxide for the selective reduction of nitrogen monoxide with propene [J].
Haneda, M ;
Kintaichi, Y ;
Inaba, M ;
Hamada, H .
APPLIED SURFACE SCIENCE, 1997, 121 :391-395
[5]   Novel Pd promoted Ag/Al2O3 catalyst for the selective reduction of NOx [J].
He, H ;
Wang, J ;
Feng, QC ;
Yu, YB ;
Yoshida, K .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2003, 46 (02) :365-370
[6]  
HELD W, 1990, SAE PAPER, DOI DOI 10.4271/900496
[7]   INFLUENCE OF SULFUR-DIOXIDE ON CATALYTIC REMOVAL OF NITRIC-OXIDE OVER COPPER ION-EXCHANGED ZSM-5 ZEOLITE [J].
IWAMOTO, M ;
YAHIRO, H ;
SHUNDO, S ;
YOSHIHIRO, Y ;
MIZUNO, N .
APPLIED CATALYSIS, 1991, 69 (02) :L15-L19
[8]  
IWAMOTO M, 1990, P S CAT TECHN REM NI, P19
[9]   Selective catalytic reduction of NOx with CH3OH, C2H5OH and C3H6 in the presence of O2 over Ag/Al2O3 catalyst:: Role of surface nitrate species [J].
Kameoka, S ;
Ukisu, Y ;
Miyadera, T .
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2000, 2 (03) :367-372
[10]   Surface properties and reactivity of Cu/γ-Al2O3 catalysts for NO reduction by C3H6 -: Influences of calcination temperatures and additives [J].
Kim, TW ;
Song, MW ;
Koh, HL ;
Kim, KL .
APPLIED CATALYSIS A-GENERAL, 2001, 210 (1-2) :35-44