CobaltMaghrebV1, PascalFrancis, Corpus, bibRecord, 000211

Effect of MgO additive on catalytic properties of Co/SiO2 in the dry reforming of methane

Identifieur interne : 000211 ( PascalFrancis/Corpus ); précédent : 000210; suivant : 000212

Effect of MgO additive on catalytic properties of Co/SiO2 in the dry reforming of methane

Auteurs : R. Bouarab ; O. Akdim ; A. Auroux ; O. Cherifi ; C. Mirodatos

Source :

Applied catalysis. A, General [ 0926-860X ] ; 2004.

RBID : Pascal:04-0286998

Descripteurs français

Pascal (Inist)
- Additif, Réaction catalytique, Silice, Reformage, Méthane, Gaz synthèse, Catalyseur, Silicate.

English descriptors

KwdEn :
- Additive, Catalyst, Catalytic reaction, Methane, Reforming, Silica, Silicates, Synthesis gas.

Abstract

The dry reforming of methane to syngas was studied in the temperature range 500-800 °C on a series of Co/SiO₂ catalysts modified by MgO (5-35 wt.%). The materials have been prepared by successive incipient wetness impregnation and characterised by BET, XRD, H2-TPR, CO₂ adsorption and in situ-DRIFT. The formation of a silicate adlayer Mg₂SiO₄ is observed at high MgO content (30-35 wt.%), which corresponds to a much improved catalytic stability under the severe dry reforming conditions. This phase favours the development of small metallic cobalt particles, preventing their coalescence under reaction conditions. A bi-functional mechanism is proposed which combines the accumulation of oxidizing agents like carbonates and hydrogeno-carbonate adspecies on the catalyst support due to a medium basicity of the layer and the reactivity of small metal particles for methane activation. This concerted process tends to limit coke formation and therefore contribute to the observed catalytic stability.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

A01	`01`	`1`		`@0 0926-860X`
A03		`1`		`@0 Appl. catal., A Gen.`
A05				`@2 264`
A06				`@2 2`
A08	`01`	`1`	`ENG`	`@1 Effect of MgO additive on catalytic properties of Co/SiO₂ in the dry reforming of methane`
A11	`01`	`1`		`@1 BOUARAB (R.)`
A11	`02`	`1`		`@1 AKDIM (O.)`
A11	`03`	`1`		`@1 AUROUX (A.)`
A11	`04`	`1`		`@1 CHERIFI (O.)`
A11	`05`	`1`		`@1 MIRODATOS (C.)`
A14	`01`			`@1 Laboratoire de Chimie de Gaz Naturel, Faculté de Chimie, U.S.T.H.B., P.O. Box 32 @2 16111 El Alia, Bab Ezzouar @3 DZA @Z 1 aut. @Z 4 aut.`
A14	`02`			`@1 Institut de Recherches sur la Catalyse, CNRS, 2 Avenue Albert Einstein @2 69626 Villeurbanne @3 FRA @Z 1 aut. @Z 2 aut. @Z 3 aut. @Z 5 aut.`
A20				`@1 161-168`
A21				`@1 2004`
A23	`01`			`@0 ENG`
A43	`01`			`@1 INIST @2 18840A @5 354000110038790040`
A44				`@0 0000 @1 © 2004 INIST-CNRS. All rights reserved.`
A45				`@0 30 ref.`
A47	`01`	`1`		`@0 04-0286998`
A60				`@1 P`
A61				`@0 A`
A64	`01`	`1`		`@0 Applied catalysis. A, General`
A66	`01`			`@0 NLD`
C01	`01`		`ENG`	@0 The dry reforming of methane to syngas was studied in the temperature range 500-800 °C on a series of Co/SiO₂ catalysts modified by MgO (5-35 wt.%). The materials have been prepared by successive incipient wetness impregnation and characterised by BET, XRD, H2-TPR, CO₂ adsorption and in situ-DRIFT. The formation of a silicate adlayer Mg₂SiO₄ is observed at high MgO content (30-35 wt.%), which corresponds to a much improved catalytic stability under the severe dry reforming conditions. This phase favours the development of small metallic cobalt particles, preventing their coalescence under reaction conditions. A bi-functional mechanism is proposed which combines the accumulation of oxidizing agents like carbonates and hydrogeno-carbonate adspecies on the catalyst support due to a medium basicity of the layer and the reactivity of small metal particles for methane activation. This concerted process tends to limit coke formation and therefore contribute to the observed catalytic stability.
C02	`01`	`X`		`@0 001C01A03`
C03	`01`	`X`	`FRE`	`@0 Additif @5 01`
C03	`01`	`X`	`ENG`	`@0 Additive @5 01`
C03	`01`	`X`	`SPA`	`@0 Aditivo @5 01`
C03	`02`	`X`	`FRE`	`@0 Réaction catalytique @5 02`
C03	`02`	`X`	`ENG`	`@0 Catalytic reaction @5 02`
C03	`02`	`X`	`SPA`	`@0 Reacción catalítica @5 02`
C03	`03`	`X`	`FRE`	`@0 Silice @2 NK @2 FX @5 03`
C03	`03`	`X`	`ENG`	`@0 Silica @2 NK @2 FX @5 03`
C03	`03`	`X`	`SPA`	`@0 Sílice @2 NK @2 FX @5 03`
C03	`04`	`X`	`FRE`	`@0 Reformage @5 04`
C03	`04`	`X`	`ENG`	`@0 Reforming @5 04`
C03	`04`	`X`	`SPA`	`@0 Reformación @5 04`
C03	`05`	`X`	`FRE`	`@0 Méthane @2 NK @2 FX @5 05`
C03	`05`	`X`	`ENG`	`@0 Methane @2 NK @2 FX @5 05`
C03	`05`	`X`	`SPA`	`@0 Metano @2 NK @2 FX @5 05`
C03	`06`	`X`	`FRE`	`@0 Gaz synthèse @5 06`
C03	`06`	`X`	`ENG`	`@0 Synthesis gas @5 06`
C03	`06`	`X`	`SPA`	`@0 Gas síntesis @5 06`
C03	`07`	`X`	`FRE`	`@0 Catalyseur @5 07`
C03	`07`	`X`	`ENG`	`@0 Catalyst @5 07`
C03	`07`	`X`	`SPA`	`@0 Catalizador @5 07`
C03	`08`	`X`	`FRE`	`@0 Silicate @2 NA @5 08`
C03	`08`	`X`	`ENG`	`@0 Silicates @2 NA @5 08`
C03	`08`	`X`	`SPA`	`@0 Silicato @2 NA @5 08`
N21				`@1 180`
N44	`01`			`@1 OTO`
N82				`@1 OTO`

Format Inist (serveur)

NO :	PASCAL 04-0286998 INIST
ET :	Effect of MgO additive on catalytic properties of Co/SiO₂ in the dry reforming of methane
AU :	BOUARAB (R.); AKDIM (O.); AUROUX (A.); CHERIFI (O.); MIRODATOS (C.)
AF :	Laboratoire de Chimie de Gaz Naturel, Faculté de Chimie, U.S.T.H.B., P.O. Box 32/16111 El Alia, Bab Ezzouar/Algérie (1 aut., 4 aut.); Institut de Recherches sur la Catalyse, CNRS, 2 Avenue Albert Einstein/69626 Villeurbanne/France (1 aut., 2 aut., 3 aut., 5 aut.)
DT :	Publication en série; Niveau analytique
SO :	Applied catalysis. A, General; ISSN 0926-860X; Pays-Bas; Da. 2004; Vol. 264; No. 2; Pp. 161-168; Bibl. 30 ref.
LA :	Anglais
EA :	The dry reforming of methane to syngas was studied in the temperature range 500-800 °C on a series of Co/SiO₂ catalysts modified by MgO (5-35 wt.%). The materials have been prepared by successive incipient wetness impregnation and characterised by BET, XRD, H2-TPR, CO₂ adsorption and in situ-DRIFT. The formation of a silicate adlayer Mg₂SiO₄ is observed at high MgO content (30-35 wt.%), which corresponds to a much improved catalytic stability under the severe dry reforming conditions. This phase favours the development of small metallic cobalt particles, preventing their coalescence under reaction conditions. A bi-functional mechanism is proposed which combines the accumulation of oxidizing agents like carbonates and hydrogeno-carbonate adspecies on the catalyst support due to a medium basicity of the layer and the reactivity of small metal particles for methane activation. This concerted process tends to limit coke formation and therefore contribute to the observed catalytic stability.
CC :	001C01A03
FD :	Additif; Réaction catalytique; Silice; Reformage; Méthane; Gaz synthèse; Catalyseur; Silicate
ED :	Additive; Catalytic reaction; Silica; Reforming; Methane; Synthesis gas; Catalyst; Silicates
SD :	Aditivo; Reacción catalítica; Sílice; Reformación; Metano; Gas síntesis; Catalizador; Silicato
LO :	INIST-18840A.354000110038790040
ID :	04-0286998

Links to Exploration step

Pascal:04-0286998

Le document en format XML

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<front><div type="abstract" xml:lang="en">The dry reforming of methane to syngas was studied in the temperature range 500-800 °C on a series of Co/SiO<sub>2</sub>
 catalysts modified by MgO (5-35 wt.%). The materials have been prepared by successive incipient wetness impregnation and characterised by BET, XRD, H2-TPR, CO<sub>2</sub>
 adsorption and in situ-DRIFT. The formation of a silicate adlayer Mg<sub>2</sub>
SiO<sub>4</sub>
 is observed at high MgO content (30-35 wt.%), which corresponds to a much improved catalytic stability under the severe dry reforming conditions. This phase favours the development of small metallic cobalt particles, preventing their coalescence under reaction conditions. A bi-functional mechanism is proposed which combines the accumulation of oxidizing agents like carbonates and hydrogeno-carbonate adspecies on the catalyst support due to a medium basicity of the layer and the reactivity of small metal particles for methane activation. This concerted process tends to limit coke formation and therefore contribute to the observed catalytic stability.</div>
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<fA14 i1="01"><s1>Laboratoire de Chimie de Gaz Naturel, Faculté de Chimie, U.S.T.H.B., P.O. Box 32</s1>
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<s3>DZA</s3>
<sZ>1 aut.</sZ>
<sZ>4 aut.</sZ>
</fA14>
<fA14 i1="02"><s1>Institut de Recherches sur la Catalyse, CNRS, 2 Avenue Albert Einstein</s1>
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<fC01 i1="01" l="ENG"><s0>The dry reforming of methane to syngas was studied in the temperature range 500-800 °C on a series of Co/SiO<sub>2</sub>
 catalysts modified by MgO (5-35 wt.%). The materials have been prepared by successive incipient wetness impregnation and characterised by BET, XRD, H2-TPR, CO<sub>2</sub>
 adsorption and in situ-DRIFT. The formation of a silicate adlayer Mg<sub>2</sub>
SiO<sub>4</sub>
 is observed at high MgO content (30-35 wt.%), which corresponds to a much improved catalytic stability under the severe dry reforming conditions. This phase favours the development of small metallic cobalt particles, preventing their coalescence under reaction conditions. A bi-functional mechanism is proposed which combines the accumulation of oxidizing agents like carbonates and hydrogeno-carbonate adspecies on the catalyst support due to a medium basicity of the layer and the reactivity of small metal particles for methane activation. This concerted process tends to limit coke formation and therefore contribute to the observed catalytic stability.</s0>
</fC01>
<fC02 i1="01" i2="X"><s0>001C01A03</s0>
</fC02>
<fC03 i1="01" i2="X" l="FRE"><s0>Additif</s0>
<s5>01</s5>
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<s5>01</s5>
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<fC03 i1="03" i2="X" l="SPA"><s0>Sílice</s0>
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<s2>FX</s2>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE"><s0>Reformage</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG"><s0>Reforming</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA"><s0>Reformación</s0>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE"><s0>Méthane</s0>
<s2>NK</s2>
<s2>FX</s2>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG"><s0>Methane</s0>
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<s5>05</s5>
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<s5>06</s5>
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<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA"><s0>Gas síntesis</s0>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE"><s0>Catalyseur</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG"><s0>Catalyst</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA"><s0>Catalizador</s0>
<s5>07</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE"><s0>Silicate</s0>
<s2>NA</s2>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG"><s0>Silicates</s0>
<s2>NA</s2>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA"><s0>Silicato</s0>
<s2>NA</s2>
<s5>08</s5>
</fC03>
<fN21><s1>180</s1>
</fN21>
<fN44 i1="01"><s1>OTO</s1>
</fN44>
<fN82><s1>OTO</s1>
</fN82>
</pA>
</standard>
<server><NO>PASCAL 04-0286998 INIST</NO>
<ET>Effect of MgO additive on catalytic properties of Co/SiO<sub>2</sub>
 in the dry reforming of methane</ET>
<AU>BOUARAB (R.); AKDIM (O.); AUROUX (A.); CHERIFI (O.); MIRODATOS (C.)</AU>
<AF>Laboratoire de Chimie de Gaz Naturel, Faculté de Chimie, U.S.T.H.B., P.O. Box 32/16111 El Alia, Bab Ezzouar/Algérie (1 aut., 4 aut.); Institut de Recherches sur la Catalyse, CNRS, 2 Avenue Albert Einstein/69626 Villeurbanne/France (1 aut., 2 aut., 3 aut., 5 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Applied catalysis. A, General; ISSN 0926-860X; Pays-Bas; Da. 2004; Vol. 264; No. 2; Pp. 161-168; Bibl. 30 ref.</SO>
<LA>Anglais</LA>
<EA>The dry reforming of methane to syngas was studied in the temperature range 500-800 °C on a series of Co/SiO<sub>2</sub>
 catalysts modified by MgO (5-35 wt.%). The materials have been prepared by successive incipient wetness impregnation and characterised by BET, XRD, H2-TPR, CO<sub>2</sub>
 adsorption and in situ-DRIFT. The formation of a silicate adlayer Mg<sub>2</sub>
SiO<sub>4</sub>
 is observed at high MgO content (30-35 wt.%), which corresponds to a much improved catalytic stability under the severe dry reforming conditions. This phase favours the development of small metallic cobalt particles, preventing their coalescence under reaction conditions. A bi-functional mechanism is proposed which combines the accumulation of oxidizing agents like carbonates and hydrogeno-carbonate adspecies on the catalyst support due to a medium basicity of the layer and the reactivity of small metal particles for methane activation. This concerted process tends to limit coke formation and therefore contribute to the observed catalytic stability.</EA>
<CC>001C01A03</CC>
<FD>Additif; Réaction catalytique; Silice; Reformage; Méthane; Gaz synthèse; Catalyseur; Silicate</FD>
<ED>Additive; Catalytic reaction; Silica; Reforming; Methane; Synthesis gas; Catalyst; Silicates</ED>
<SD>Aditivo; Reacción catalítica; Sílice; Reformación; Metano; Gas síntesis; Catalizador; Silicato</SD>
<LO>INIST-18840A.354000110038790040</LO>
<ID>04-0286998</ID>
</server>
</inist>
</record>

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	Serveur d'exploration sur le cobalt au Maghreb
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Effect of MgO additive on catalytic properties of Co/SiO2 in the dry reforming of methane

Effect of MgO additive on catalytic properties of Co/SiO2 in the dry reforming of methane

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