Copper active sites for the selective reduction of nitrogen monoxide by propane on Cu-MFI catalysts and non-zeolitic supported-copper solids

被引：20

作者：

Chajar, Z ^{[1
]}

Le Chanu, V ^{[1
]}

Primet, M ^{[1
]}

Praliaud, H ^{[1
]}

机构：

[1] Univ Lyon 1, UM 5634 CNRS, Lab Applicat Chim Environm, F-69622 Villeurbanne, France

来源：

CATALYSIS LETTERS | 1998年 / 52卷 / 1-2期

关键词：

DeNOx; selective nitric oxide reduction; Cu-MFI catalysts; Cu/Al2O3; Cu/SiO2; Cu/SiO2-Al2O3; Cu on non-zeolitic supports; Si/Al ratio; copper active sites;

D O I：

10.1023/A:1019023504284

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 reduction of NO by C3H8 is performed on copper-based catalysts: Cu/Al2O3, Cu/SiO2, Cu/SiO2-Al2O3 solids, fresh and hydrothermally-treated Cu-MFI with various Si/Al ratios. For all the Cu-MFI solids and for the non-zeolitic supported-copper solids with low copper loadings, O-2 promotes the reduction of NO. The C3H8-NO reaction rate correlates with the number of accessible and isolated Cun+ ions deduced from the infrared spectroscopy of adsorbed CO. When only one type of sites is detected, the FTIR spectroscopy of adsorbed CO allows an estimation of the copper dispersion.

引用

页码：97 / 102

页数：6

共 35 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] An infrared study of NO decomposition over Cu-ZSM-5 [J].

Aylor, AW ;

Larsen, SC ;

Reimer, JA ;

Bell, AT .

JOURNAL OF CATALYSIS, 1995, 157 (02) :592-602

[3] 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

[4] Redox chemistry of Cu/ZSM-5 [J].

Beutel, T ;

Sarkany, J ;

Lei, GD ;

Yan, JY ;

Sachtler, WMH .

JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (02) :845-851

[5] ROLE OF PROPENE IN THE SELECTIVE REDUCTION OF NITROGEN MONOXIDE IN COPPER-EXCHANGED ZEOLITES [J].

BURCH, R ;

MILLINGTON, PJ .

APPLIED CATALYSIS B-ENVIRONMENTAL, 1993, 2 (01) :101-116

[6] Kinetics and mechanism of the reduction of NO by C3H8 over Pt/Al2O3 under lean-burn conditions [J].

Burch, R ;

Watling, TC .

JOURNAL OF CATALYSIS, 1997, 169 (01) :45-54

[7] FT-IR STUDY OF THE SURFACE OF COPPER-OXIDE [J].

BUSCA, G .

JOURNAL OF MOLECULAR CATALYSIS, 1987, 43 (02) :225-236

[8] ADSORPTION AND REACTIVITY OF NO ON COPPER-ON-ALUMINA CATALYSTS .2. ADSORBED SPECIES AND COMPETITIVE PATHWAYS IN THE REACTION OF NO WITH NH3 AND O-2 [J].

CENTI, G ;

PERATHONER, S .

JOURNAL OF CATALYSIS, 1995, 152 (01) :93-102

[9] NATURE OF ACTIVE SPECIES IN COPPER-BASED CATALYSTS AND THEIR CHEMISTRY OF TRANSFORMATION OF NITROGEN-OXIDES [J].

CENTI, G ;

PERATHONER, S .

APPLIED CATALYSIS A-GENERAL, 1995, 132 (02) :179-259

[10]

CENTI G, 1995, J CATAL, V151, P75

← 1 2 3 4 →