In situ DRIFTS studies of high-temperature water-gas shift reaction on chromium-free iron oxide catalysts

被引：34

作者：

Boudjemaa, Amel ^{[1
]}

Daniel, Cecile ^{[2
]}

Mirodatos, Claude ^{[2
]}

Trari, Mohamed ^{[1
]}

Auroux, Aline ^{[2
]}

Bouarab, Rabah ^{[1
]}

机构：

[1] USTHB, Fac Chim, Labs CGN & LSVER, Bab Ezzouar 16111, Algers, Algeria

[2] CNRS UCB Lyon 1, Inst Rech Catalyse & Environm Lyon, UMR 5256, F-69626 Villeurbanne, France

来源：

COMPTES RENDUS CHIMIE | 2011年 / 14卷 / 06期

关键词：

DRIFTS study; WGSR; Fe(2)O(3); MgO; SiO(2); TiO(2); PROMOTED REACTION-MECHANISM; CARBON-MONOXIDE; CO; CERIA; FTIR;

D O I：

10.1016/j.crci.2010.11.007

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The identification of reaction surface intermediates in the high-temperature water-gas shift reaction on iron oxide unpromoted and promoted MgO, SiO(2) and TiO(2) has been studied via diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). The dosing of the gas mixture CO + H(2)O onto reduced Fe(2)O(3)/MgO as a function of reaction temperature produced formate species (1720, 1630 and 1370 cm(-1)) as a surface intermediate. On reduced Fe(2)O(3)/TiO(2) only bands characteristic of carbonate species (1630 and 1550 cm(-1)) are observed. A direct correlation between catalytic activity and acid/base properties of our catalysts is established. The Fe(2)O(3)/MgO basic catalyst is 100 times more active than the acidic catalyst Fe(2)O(3)/SiO(2). (C) 2010 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.

引用

页码：534 / 538

页数：5

共 21 条

[1] FTIR study of the low-temperature water-gas shift reaction on Au/Fe2O3 and Au/TiO2 catalysts [J].

Boccuzzi, F ;

Chiorino, A ;

Manzoli, M ;

Andreeva, D ;

Tabakova, T .

JOURNAL OF CATALYSIS, 1999, 188 (01) :176-185

[2] A kinetic and DRIFTS study of low-temperature carbon monoxide oxidation over Au-TiO2 catalysts [J].

Bollinger, MA ;

Vannice, MA .

APPLIED CATALYSIS B-ENVIRONMENTAL, 1996, 8 (04) :417-443

[3] Effect of support on the crystalline structure, the acid-base properties and activity of iron based systems in the CO + H2O reaction. [J].

Bouarab, Rabah ;

Boudjemaa, Amel ;

Trari, Mohamed ;

Bennici, Simona ;

Auroux, Aline .

COMPTES RENDUS CHIMIE, 2009, 12 (3-4) :527-532

[4]

BOUDJEMAA A, 2006, J SOC ALGER CHIM, V16, P139

[5] Hydrogen production on iron-magnesium oxide in the high-temperature water-gas shift reaction [J].

Boudjemaa, Amel ;

Auroux, Aline ;

Boumaza, Souhila ;

Trari, Mohamed ;

Cherifi, Ouiza ;

Bouarab, Rabah .

REACTION KINETICS AND CATALYSIS LETTERS, 2009, 98 (02) :319-325

[6] WATER-GAS SHIFT REACTION OVER AN IRON-OXIDE CHROMIUM-OXIDE CATALYST .1. MASS-TRANSPORT EFFECTS [J].

CHINCHEN, GC ;

LOGAN, RH ;

SPENCER, MS .

APPLIED CATALYSIS, 1984, 12 (01) :69-88

[7]

Costa JLR, 2002, CATAL TODAY, V77, P205

[8] Reaction of carbon monoxide with water on supported iridium catalysts [J].

Erdohelyi, A ;

Fodor, K ;

Suru, G .

APPLIED CATALYSIS A-GENERAL, 1996, 139 (1-2) :131-147

[9] THE CHEMISTRY AND CATALYSIS OF THE WATER GAS SHIFT REACTION .1. THE KINETICS OVER SUPPORTED METAL-CATALYSTS [J].

GRENOBLE, DC ;

ESTADT, MM ;

OLLIS, DF .

JOURNAL OF CATALYSIS, 1981, 67 (01) :90-102

[10] Reactive behaviors of iron-based shift catalyst promoted by ceria [J].

Hu, YP ;

Jin, HF ;

Liu, JR ;

Hao, DS .

CHEMICAL ENGINEERING JOURNAL, 2000, 78 (2-3) :147-152

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