Ba,K,Co/CeO2 catalysts for NOx traps: Effect of preparation procedure

被引：15

作者：

Ariela Peralta, Maria ^{[1
]}

Sanchez, Barbara S. ^{[1
]}

Alicia Ulla, Maria ^{[1
]}

Querini, Carlos A. ^{[1
]}

机构：

[1] FIQ UNL CONICET, INCAPE, Inst Invest Catalisis & Petroquim, RA-3000 Santa Fe, Argentina

来源：

APPLIED CATALYSIS A-GENERAL | 2011年 / 393卷 / 1-2期

关键词：

NOx traps; Barium; Cobalt; Potassium; Perovskite; OXYGEN-RICH ATMOSPHERES; SOOT COMBUSTION; NITROGEN-OXIDES; SELECTIVE REDUCTION; BA; K/CEO2; CATALYST; DIESEL SOOT; OXIDATION; EXHAUST; STORAGE; HYDROCARBONS;

D O I：

10.1016/j.apcata.2010.11.042

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：

Ba,K,Co/CeO2 catalysts for diesel soot and NO abatement were studied. Different preparation procedures were analyzed, varying the cobalt precursor and the order of their impregnation. The catalyst interaction with NO + O-2 was studied using a microbalance and testing in both NO + O-2 and He atmospheres. Fourier Transformed Infrared Spectroscopy (FTIR) and X-Ray Diffraction (XRD) were used to characterize the catalysts. The behavior of these catalysts as NOx traps was different. It was found that when cobalt nitrate was added to the Ba,K/CeO2 catalyst, a high NOx adsorption capacity was obtained and, what is even more interesting, that the decomposition of the nitrated species occurred at lower temperature. The identification by XRD of a perovskite BaCoO3 formed upon this preparation procedure was considered to be responsible for the different behavior observed in this particular catalyst. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：184 / 188

页数：5

共 19 条

[1]

BELLAGRAMPA B, 1990, 8 INT S PART CONTR S

[2] Removal of nitrogen oxides from the exhaust of a lean-tune gasoline engine [J].

Bogner, W ;

Kramer, M ;

Krutzsch, B ;

Pischinger, S ;

Voigtlander, D ;

Wenninger, G ;

Wirbeleit, F ;

Brogan, MS ;

Brisley, RJ ;

Webster, DE .

APPLIED CATALYSIS B-ENVIRONMENTAL, 1995, 7 (1-2) :153-171

[3]

CERICOLA R, 1992, RIV COMBUST, V46, P149

[4] The mechanism for NOx storage [J].

Fridell, E ;

Persson, H ;

Westerberg, B ;

Olsson, L ;

Skoglundh, M .

CATALYSIS LETTERS, 2000, 66 (1-2) :71-74

[5] Catalytic oxidation of diesel soot: New characterization and kinetic evidence related to the reaction mechanism on K/CeO2 catalyst [J].

Gross, Martin S. ;

Ulla, Maria A. ;

Querini, Carlos A. .

APPLIED CATALYSIS A-GENERAL, 2009, 360 (01) :81-88

[6] Promoting effect of Pt on CoZeolites upon the SCR of NOx [J].

Gutierrez, L ;

Boix, A ;

Petunchi, JO .

JOURNAL OF CATALYSIS, 1998, 179 (01) :179-191

[7] HIGHLY SELECTIVE REDUCTION OF NITROGEN-OXIDES WITH HYDROCARBONS OVER H-FORM ZEOLITE CATALYSTS IN OXYGEN-RICH ATMOSPHERES [J].

HAMADA, H ;

KINTAICHI, Y ;

SASAKI, M ;

ITO, T ;

TABATA, M .

APPLIED CATALYSIS, 1990, 64 (1-2) :L1-L4

[8] Deterioration mode of barium-containing NOx storage catalyst [J].

Jang, BH ;

Yeon, TH ;

Han, HS ;

Park, YK ;

Yie, JE .

CATALYSIS LETTERS, 2001, 77 (1-3) :21-28

[9]

Kabusjiki J., 1994, [No title captured], Patent No. [EP658370, 658370]

[10] SELECTIVE REDUCTION OF NITROGEN-OXIDES WITH HYDROCARBONS OVER SOLID ACID CATALYSTS IN OXYGEN-RICH ATMOSPHERES [J].

KINTAICHI, Y ;

HAMADA, H ;

TABATA, M ;

SASAKI, M ;

ITO, T .

CATALYSIS LETTERS, 1990, 6 (02) :239-244

← 1 2 →