A highly sulfur resistant Pt-Sn/γ-Al2O3 catalyst for C3H8-NO-O2 reaction under lean conditions

被引：33
作者：
Corro, G
Fierro, JLG
Montiel, R
Castillo, S
Moran, M
机构：
[1] Univ Autonoma Puebla, Inst Ciencias Benemerita, Puebla 72570, Mexico
[2] CSIC, Inst Catalisis & Petr Quim, Madrid 28049, Spain
[3] Inst Mexicano Petr, Mexico City 0700, DF, Mexico
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2003年 / 46卷 / 02期
关键词：
sulfated Pt-Sn catalysts; sulfur deactivation resistance; lean-burn conditions; NOx reduction; promotion by Sn; propane combustion;
D O I：
10.1016/S0926-3373(03)00222-4
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 selective catalytic reduction (SCR) of NO with C3H8 was studied over 1% Pt/gamma-Al2O3, and 1% Pt-2% Sn/gamma-Al2O3 catalysts. The SO2 effect on the catalysts activity was examined using pre-sulfated samples of the above catalysts and SO2-containing feeds. A high SO2 tolerance of 1% Pt-2% Sn/gamma-Al2O3 pre-sulfated catalyst for C3H8-NO-O-2 reaction was found. Above 200degreesC, NO was converted mainly into N-2 and N2O. Surface analysis of both unsulfated and pre-sulfated catalysts by X-ray photoelectron spectroscopy (XPS) revealed that Sn addition to 1% Pt/gamma-Al2O3 prevents Pt particles from sintering during high temperature sulfation process. This fact suggests that a Pt-Sn/gamma-Al2O3 catalyst can resist high temperature reactions during automotive exhaust control without losing Pt active area. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：307 / 317
页数：11
相关论文
共 27 条
[1]   Lean NOx catalysis for diesel passenger cars: Investigating effects of sulfur dioxide and space velocity [J].
Adams, KM ;
Cavataio, JV ;
Hammerle, RH .
APPLIED CATALYSIS B-ENVIRONMENTAL, 1996, 10 (1-3) :157-181
[2]   ON THE SULFUR-AIDED METAL SUPPORT INTERACTION IN PT/AL2O3-CL CATALYSTS [J].
APESTEGUIA, CR ;
GARETTO, TF ;
BORGNA, A .
JOURNAL OF CATALYSIS, 1987, 106 (01) :73-84
[3]  
BECAUD R, 1981, J CATAL, V69, P399
[4]  
Beck DD, 1991, 910844 SAE
[5]  
BERNDT H, 1997, ANORGAN CHEM, V429, P47
[6]  
BRIGGS D, 1990, PRACTICAL SURFACE AN
[7]   Mechanistic considerations for the reduction of NOx over Pt/Al2O3 and Al2O3 catalysts under lean-burn conditions [J].
Burch, R ;
Sullivan, JA ;
Watling, TC .
CATALYSIS TODAY, 1998, 42 (1-2) :13-23
[8]   The effect of sulphur on the reduction of NO by C3H6 and C3H8 over Pt/Al2O3 under lean-burn conditions [J].
Burch, R ;
Watling, TC .
APPLIED CATALYSIS B-ENVIRONMENTAL, 1998, 17 (1-2) :131-139
[9]   Improved effect on the reduction of NO by propane under oxidizing conditions on sulfated Pt-Sn/Al2O3 catalysts [J].
Corro, G ;
Montiel, R .
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2002, 184 (1-2) :443-449
[10]   The effect of CH4, H2O and SO2 on the NO reduction with C3H6 [J].
Efthimiadis, EA ;
Lionta, GD ;
Christoforou, SC ;
Vasalos, IA .
CATALYSIS TODAY, 1998, 40 (01) :15-26
123