Improved light-off performance by using transient gas compositions in the catalytic treatment of car exhausts

被引：17

作者：

Skoglundh, M ^{[1
]}

Thormählen, P ^{[1
]}

Fridell, E ^{[1
]}

Hajbolouri, F ^{[1
]}

Jobson, E ^{[1
]}

机构：

[1] Chalmers Univ Technol, Competence Ctr Catalysis, S-41296 Gothenburg, Sweden

来源：

CHEMICAL ENGINEERING SCIENCE | 1999年 / 54卷 / 20期

关键词：

platinum; cobalt oxide; catalytic oxidation; exhaust gas catalysis; low-temperature activity; transient conditions; periodic pulsing;

D O I：

10.1016/S0009-2509(99)00139-6

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The influence of transient changes in the exhaust gas composition on the low-temperature activity of a Pt/CoOx/Al2O3, catalyst and a commercial three-way catalyst has been studied. Periodic O-2 and CO pulses caused well-controlled perturbations in the composition of a synthetic car exhaust which was found to affect the overall performance of both catalysts. The presence of transients shifted the conversion starts of CO and propene as well as their light-off temperatures towards lower temperatures. The improved performance is suggested to origin from the combined effect of rich (CO) and lean (O-2) pulses that cause perturbations in the adsorbate composition on the active sites at temperatures below light off. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：4559 / 4566

页数：8

共 15 条

[1] DYNAMIC BEHAVIOR OF AUTOMOTIVE CATALYSTS .1. CATALYST OXIDATION AND REDUCTION [J].

HERZ, RK .

INDUSTRIAL & ENGINEERING CHEMISTRY PRODUCT RESEARCH AND DEVELOPMENT, 1981, 20 (03) :451-457

[2]

Jobson E., 1994, 940926 SOC AUT ENG, P219

[3]

JOBSON E, 1993, 930937 SOC AUT ENG, P153

[4]

MCCABE RW, 1995, CHEM IND, V15, P605

[5]

Mergler YJ, 1995, STUD SURF SCI CATAL, V96, P163

[6] CO oxidation over promoted Pt catalysts [J].

Mergler, YJ ;

vanAalst, A ;

vanDelft, J ;

Nieuwenhuys, BE .

APPLIED CATALYSIS B-ENVIRONMENTAL, 1996, 10 (04) :245-261

[7] 3-WAY CATALYSTS IN A HYBRID DRIVE SYSTEM .1. EXPERIMENTAL-STUDY OF DYNAMIC BEHAVIOR [J].

PADESTE, L ;

BAIKER, A .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1994, 33 (05) :1113-1119

[8]

SHINJOH H, 1987, STUD SURF SCI CATAL, V30, P187

[9]

SILVER RG, 1991, STUD SURF SCI CATAL, V71, P167, DOI 10.1016/S0167-2991(08)62977-8

[10]

Skoglundh M, 1998, STUD SURF SCI CATAL, V116, P113

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