NO reduction under diesel exhaust conditions over Au/Al2O3 prepared by deposition-precipitation method

被引：26

作者：

Miguel, P. ^{[1
,2
]}

Granger, P. ^{[1
]}

Jagtap, N. ^{[3
]}

Umbarkar, S. ^{[3
]}

Dongare, M. ^{[3
]}

Dujardin, C. ^{[1
]}

机构：

[1] Univ Lille 1, Univ Nord France, UCCS UMR8181, F-59655 Villeneuve Dascq, France

[2] RENAULT SAS, Direct Ingn MAT, F-91510 Lardy, France

[3] Natl Chem Lab, Catalysis & Inorgan Chem Div, Pune 411008, Maharashtra, India

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2010年 / 322卷 / 1-2期

关键词：

NO reduction; Gold; Deposition-precipitation; In situ IR; XPS; SELECTIVE CATALYTIC-REDUCTION; LEAN-BURN CONDITIONS; SUPPORTED GOLD CATALYSTS; IN-SITU FTIR; METAL-OXIDES; NITROGEN MONOXIDE; SULFUR TOLERANCE; CO OXIDATION; PROPENE; HYDROCARBONS;

D O I：

10.1016/j.molcata.2010.02.024

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：

Gold supported on alumina was prepared by urea deposition-precipitation method and compared to silver supported on alumina for the selective catalytic reduction of NO by hydrocarbons under lean conditions. The catalyst showed activity in the reduction of NO and 100% selectivity towards N-2 in the temperature range 300-350 degrees C. At higher temperature the NO conversion decreased due to competitive oxidative reactions of the reductants. XPS analysis confirmed the good stability of gold nanoparticles deposited on alumina. Infrared studies showed the formation of various adsorbed species (formates, carboxylates, ad-NOx and cyanide) on the catalyst surface. Addition of H-2 to the feed containing decane enhanced the formation of these species on the catalyst surface as well as the catalytic activity for the NO conversion to N-2. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：90 / 97

页数：8

共 35 条

[1] The effect of H2 and CO on the selective catalytic reduction of NO, under real diesel engine exhaust conditions over Pt/Al2O3 [J].

Abu-Jrai, A. ;

Tsolakis, A. .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2007, 32 (12) :2073-2080

[2] Study by in situ FTIR spectroscopy of the SCR of NO, by ethanol on Ag/Al2O3 -: Evidence of the role of isocyanate species [J].

Bion, N ;

Saussey, J ;

Haneda, M ;

Daturi, M .

JOURNAL OF CATALYSIS, 2003, 217 (01) :47-58

[3] FTIR, UV-Vis, and HRTEM study of Au/ZrO2 catalyst:: Reduced reactivity in the CO-O2 reaction of electron-deficient gold sites present on the used samples [J].

Boccuzzi, F ;

Cerrato, G ;

Pinna, F ;

Strukul, G .

JOURNAL OF PHYSICAL CHEMISTRY B, 1998, 102 (30) :5733-5736

[4] Catalytic oxidation of methanol on Mo/Al2O3 catalyst:: An EPR and Raman/infrared operando spectroscopies study [J].

Brandhorst, M ;

Cristol, S ;

Capron, M ;

Dujardin, C ;

Vezin, H ;

Le bourdon, G ;

Payen, E .

CATALYSIS TODAY, 2006, 113 (1-2) :34-39

[5] An investigation of the thermal stability and sulphur tolerance of Ag/γ-Al2O3 catalysts for the SCR of NOx with hydrocarbons and hydrogen [J].

Breen, J. P. ;

Burch, R. ;

Hardacre, C. ;

Hill, C. J. ;

Krutzsch, B. ;

Bandl-Konrad, B. ;

Jobson, E. ;

Cider, L. ;

Blakeman, P. G. ;

Peace, L. J. ;

Twigg, M. V. ;

Preis, M. ;

Gottschling, M. .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2007, 70 (1-4) :36-44

[6] 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

[7] FT-IR STUDY OF THE ADSORPTION AND TRANSFORMATION OF FORMALDEHYDE ON OXIDE SURFACES [J].

BUSCA, G ;

LAMOTTE, J ;

LAVALLEY, JC ;

LORENZELLI, V .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1987, 109 (17) :5197-5202

[8] On the potential role of hydroxyl groups in CO oxidation over Au/Al2O3 [J].

Costello, CK ;

Yang, JH ;

Law, HY ;

Wang, Y ;

Lin, JN ;

Marks, LD ;

Kung, MC ;

Kung, HH .

APPLIED CATALYSIS A-GENERAL, 2003, 243 (01) :15-24

[9] The beneficial effect of the addition of base metal oxides to gold catalysts on reactions relevant to air pollution abatement [J].

Gluhoi, AC ;

Lin, SD ;

Nieuwenhuys, BE .

CATALYSIS TODAY, 2004, 90 (3-4) :175-181

[10] Comparative studies of the N2O/H2, N2O/CO, H2/O2 and CO/O2 reactions on supported gold catalysts:: effect of the addition of various oxides [J].

Gluhoi, AC ;

Dekkers, MAP ;

Nieuwenhuys, BE .

JOURNAL OF CATALYSIS, 2003, 219 (01) :197-205

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