Improvement of Pt catalyst for soot oxidation using mixed oxide as a support

被引：128

作者：

Oi-Uchisawa, J

Wang, SD

Nanba, T

Ohi, A

Obuchi, A

机构：

[1] Natl Inst Adv Ind Sci & Technol, Inst Environm Management Technol, Catalyt & Electrochem Purificat Grp, Tsukuba, Ibaraki 3058569, Japan

[2] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2003年 / 44卷 / 03期

关键词：

Pt; catalyst; carbon blacks; soot; diesel exhaust; mixed oxide; TiO2-SiO2; DPF; sulfur; sulfate;

D O I：

10.1016/S0926-3373(03)00055-9

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：

Catalytic activity of Pt catalysts for soot oxidation was studied using temperature programmed reactions. The activity of Pt loaded over TiO2-SiO2 (Pt/TiO2-SiO2) showed higher activity than other Pt/MOx systems (MOx = TiO2, ZrO2, SiO2, Al2O3. TiO2-ZrO2. TiO2-Al2O3, ZrO2-SiO2, ZrO2-Al2O3, SiO2-Al2O3). The activity was highest when the molar ratio of TiO2/(TiO2 + SiO2) ranged from 0.4 to 0.7. The effect of pretreatment with a gas containing low SO2 concentrations on the activity was compared for Pt/SiO2, Pt/TiO2 and Pt/TiO2-SiO2. In the case of Pt/TiO2-SiO2, the activity was markedly promoted by the pretreatment whereas no variation in the activity was observed for Pt/SiO2. The difference in the behavior towards the SO, pretreatment was attributed to property difference in the supports for sulfate accumulation. The high activity of Pt/TiO2-SiO2 was also confirmed under practical conditions with a diesel engine exhaust using a catalyst-supported diesel particulate filter (DPF). (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：207 / 215

页数：9

共 11 条

[1]

COOPER BJ, 1989, SAE PAPER SERIES

[2] Sulfur impact on diesel emission control - A review [J].

Corro, G .

REACTION KINETICS AND CATALYSIS LETTERS, 2002, 75 (01) :89-106

[3]

FARRAUTO R, 1993, SAE TECHNICAL PAPER

[4]

HAWKER P, 1997, SAE TECHNICAL PAPER

[5] Structure and properties of TiO2-SiO2 prepared by sol-gel method in the presence of tartaric acid [J].

Izutsu, H ;

Nair, PK ;

Maeda, K ;

Kiyozumi, Y ;

Mizukami, F .

MATERIALS RESEARCH BULLETIN, 1997, 32 (09) :1303-1311

[6] Reactivities of active oxygen species and their roles in the catalytic oxidation of inactive hydrocarbon [J].

Moro-oka, Y .

CATALYSIS TODAY, 1998, 45 (1-4) :3-12

[7] Catalysts for the oxidation of soot from diesel exhaust gases .2. Contact between soot and catalyst under practical conditions [J].

Neeft, JPA ;

vanPruissen, OP ;

Makkee, M ;

Moulijn, JA .

APPLIED CATALYSIS B-ENVIRONMENTAL, 1997, 12 (01) :21-31

[8] Effect of feed gas composition on the rate of carbon oxidation with Pt/SiO2 and the oxidation mechanism [J].

Oi-Uchisawa, J ;

Obuchi, A ;

Ogata, A ;

Enomoto, R ;

Kushiyama, S .

APPLIED CATALYSIS B-ENVIRONMENTAL, 1999, 21 (01) :9-17

[9] Oxidation of carbon black over various Pt/MOx/SiC catalysts [J].

Oi-Uchisawa, J ;

Obuchi, A ;

Enomoto, R ;

Xu, JY ;

Nanba, T ;

Liu, ST ;

Kushiyama, S .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2001, 32 (04) :257-268

[10]

Uchisawa J. O., 2000, APPL CATAL B-ENVIRON, V26, P17

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