CobaltMaghrebV1, PascalFrancis, Curation, bibRecord, 000101

On the performance of a highly loaded Co/SiO2 catalyst in the gas phase hydrogenation of crotonaldehyde thermal treatments: catalyst structure-selectivity relationship

Identifieur interne : 000101 ( PascalFrancis/Curation ); précédent : 000100; suivant : 000102

On the performance of a highly loaded Co/SiO2 catalyst in the gas phase hydrogenation of crotonaldehyde thermal treatments: catalyst structure-selectivity relationship

Auteurs : F. Djerboua [Algérie] ; D. Benachour [Algérie] ; R. Touroude [France]

Source :

Applied catalysis. A, General [ 0926-860X ] ; 2005.

RBID : Pascal:05-0170318

Descripteurs français

Pascal (Inist)
- Silice, Catalyseur, Phase gazeuse, Hydrogénation, Sélectivité catalyseur, Structure, Alcool, Oxyde, Catalyse hétérogène, Cobalt, But-2-énal.
Wicri :
- topic : Alcool, Oxyde, Cobalt.

English descriptors

KwdEn :
- Alcohol, Catalyst, Catalyst selectivity, Cobalt, Gas phase, Heterogeneous catalysis, Hydrogenation, Oxides, Silica, Structure.

Abstract

This paper reports on the performance and its relation with the structure of a highly loaded (41 wt.%) Co/SiO₂ catalyst in the gas phase hydrogenation of crotonaldehyde when varying the thermal treatments to which the catalyst precursor has been subjected. The optimum calcination and reduction temperatures were identified where the highest selectivity to crotyl alcohol (around 90%) was obtained with the catalyst calcined at 400 °C and reduced at 350 °C even at conversions as high as 60%. Higher temperature of calcination was found to lower the crotyl alcohol selectivity. Both, lower and higher reduction temperatures will not favour the crotyl alcohol formation. These results were interpreted and correlated with the surface structure of the catalyst which was shown by temperature programmed reduction (TPR) and X-ray photoelectron spectroscopy (XPS) analysis. Depending on the thermal conditions imposed, the surface consisted of either Co metal, or coexisting metal and its oxide; structure which favours the high crotyl alcohol selectivity. By TEM analysis, large particles (diameter exceeding 50 nm) were identified after reduction at 350 °C. A global activation energy of 44 kJ/mol was obtained with this catalyst. In the light of the obtained results a discussion on the reaction mechanism involving metal, metal-oxide double sites has been put forward. It was emphasised that, for selective hydrogenation of crotonaldehyde into unsaturated alcohol, Co catalysts compete favourably with platinum based catalysts.

A01	`01`	`1`		`@0 0926-860X`
A03		`1`		`@0 Appl. catal., A Gen.`
A05				`@2 282`
A06				`@2 1-2`
A08	`01`	`1`	`ENG`	`@1 On the performance of a highly loaded Co/SiO₂ catalyst in the gas phase hydrogenation of crotonaldehyde thermal treatments: catalyst structure-selectivity relationship`
A11	`01`	`1`		`@1 DJERBOUA (F.)`
A11	`02`	`1`		`@1 BENACHOUR (D.)`
A11	`03`	`1`		`@1 TOUROUDE (R.)`
A14	`01`			`@1 Département de Génie des Procédés, Faculté des Sciences de l'ingénieur, Université Ferhat Abbas, route de Maaboudah @2 Setif 19000 @3 DZA @Z 1 aut. @Z 2 aut.`
A14	`02`			`@1 LMSPC, UMR 7515 du CNRS ECPM.ULP, 25 rue Becquerel @2 67087 Strasbourg @3 FRA @Z 3 aut.`
A20				`@1 123-133`
A21				`@1 2005`
A23	`01`			`@0 ENG`
A43	`01`			`@1 INIST @2 18840A @5 354000126367680150`
A44				`@0 0000 @1 © 2005 INIST-CNRS. All rights reserved.`
A45				`@0 39 ref.`
A47	`01`	`1`		`@0 05-0170318`
A60				`@1 P`
A61				`@0 A`
A64	`01`	`1`		`@0 Applied catalysis. A, General`
A66	`01`			`@0 NLD`
C01	`01`		`ENG`	@0 This paper reports on the performance and its relation with the structure of a highly loaded (41 wt.%) Co/SiO₂ catalyst in the gas phase hydrogenation of crotonaldehyde when varying the thermal treatments to which the catalyst precursor has been subjected. The optimum calcination and reduction temperatures were identified where the highest selectivity to crotyl alcohol (around 90%) was obtained with the catalyst calcined at 400 °C and reduced at 350 °C even at conversions as high as 60%. Higher temperature of calcination was found to lower the crotyl alcohol selectivity. Both, lower and higher reduction temperatures will not favour the crotyl alcohol formation. These results were interpreted and correlated with the surface structure of the catalyst which was shown by temperature programmed reduction (TPR) and X-ray photoelectron spectroscopy (XPS) analysis. Depending on the thermal conditions imposed, the surface consisted of either Co metal, or coexisting metal and its oxide; structure which favours the high crotyl alcohol selectivity. By TEM analysis, large particles (diameter exceeding 50 nm) were identified after reduction at 350 °C. A global activation energy of 44 kJ/mol was obtained with this catalyst. In the light of the obtained results a discussion on the reaction mechanism involving metal, metal-oxide double sites has been put forward. It was emphasised that, for selective hydrogenation of crotonaldehyde into unsaturated alcohol, Co catalysts compete favourably with platinum based catalysts.
C02	`01`	`X`		`@0 001C01A03`
C03	`01`	`X`	`FRE`	`@0 Silice @2 NK @2 FX @5 01`
C03	`01`	`X`	`ENG`	`@0 Silica @2 NK @2 FX @5 01`
C03	`01`	`X`	`SPA`	`@0 Sílice @2 NK @2 FX @5 01`
C03	`02`	`X`	`FRE`	`@0 Catalyseur @5 02`
C03	`02`	`X`	`ENG`	`@0 Catalyst @5 02`
C03	`02`	`X`	`SPA`	`@0 Catalizador @5 02`
C03	`03`	`X`	`FRE`	`@0 Phase gazeuse @5 03`
C03	`03`	`X`	`ENG`	`@0 Gas phase @5 03`
C03	`03`	`X`	`SPA`	`@0 Fase gaseosa @5 03`
C03	`04`	`X`	`FRE`	`@0 Hydrogénation @5 04`
C03	`04`	`X`	`ENG`	`@0 Hydrogenation @5 04`
C03	`04`	`X`	`SPA`	`@0 Hidrogenación @5 04`
C03	`05`	`X`	`FRE`	`@0 Sélectivité catalyseur @5 05`
C03	`05`	`X`	`ENG`	`@0 Catalyst selectivity @5 05`
C03	`05`	`X`	`SPA`	`@0 Selectividad catalizador @5 05`
C03	`06`	`X`	`FRE`	`@0 Structure @5 06`
C03	`06`	`X`	`ENG`	`@0 Structure @5 06`
C03	`06`	`X`	`SPA`	`@0 Estructura @5 06`
C03	`07`	`X`	`FRE`	`@0 Alcool @5 07`
C03	`07`	`X`	`ENG`	`@0 Alcohol @5 07`
C03	`07`	`X`	`SPA`	`@0 Alcohol @5 07`
C03	`08`	`X`	`FRE`	`@0 Oxyde @2 NA @5 08`
C03	`08`	`X`	`ENG`	`@0 Oxides @2 NA @5 08`
C03	`08`	`X`	`SPA`	`@0 Óxido @2 NA @5 08`
C03	`09`	`X`	`FRE`	`@0 Catalyse hétérogène @5 09`
C03	`09`	`X`	`ENG`	`@0 Heterogeneous catalysis @5 09`
C03	`09`	`X`	`SPA`	`@0 Catálisis heterogénea @5 09`
C03	`10`	`X`	`FRE`	`@0 Cobalt @2 NC @5 12`
C03	`10`	`X`	`ENG`	`@0 Cobalt @2 NC @5 12`
C03	`10`	`X`	`SPA`	`@0 Cobalto @2 NC @5 12`
C03	`11`	`X`	`FRE`	`@0 But-2-énal @4 INC @5 32`
C07	`01`	`X`	`FRE`	`@0 Enaldéhyde @5 10`
C07	`01`	`X`	`ENG`	`@0 Enaldehyde @5 10`
C07	`01`	`X`	`SPA`	`@0 Enaldehido @5 10`
C07	`02`	`X`	`FRE`	`@0 Métal transition @2 NC @5 11`
C07	`02`	`X`	`ENG`	`@0 Transition metal @2 NC @5 11`
C07	`02`	`X`	`SPA`	`@0 Metal transición @2 NC @5 11`
N21				`@1 115`
N44	`01`			`@1 OTO`
N82				`@1 OTO`

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Pascal:05-0170318

Le document en format XML

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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">On the performance of a highly loaded Co/SiO<sub>2</sub>
 catalyst in the gas phase hydrogenation of crotonaldehyde thermal treatments: catalyst structure-selectivity relationship</title>
<author><name sortKey="Djerboua, F" sort="Djerboua, F" uniqKey="Djerboua F" first="F." last="Djerboua">F. Djerboua</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Département de Génie des Procédés, Faculté des Sciences de l'ingénieur, Université Ferhat Abbas, route de Maaboudah</s1>
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<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Département de Génie des Procédés, Faculté des Sciences de l'ingénieur, Université Ferhat Abbas, route de Maaboudah</s1>
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<series><title level="j" type="main">Applied catalysis. A, General</title>
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<term>Catalyst</term>
<term>Catalyst selectivity</term>
<term>Cobalt</term>
<term>Gas phase</term>
<term>Heterogeneous catalysis</term>
<term>Hydrogenation</term>
<term>Oxides</term>
<term>Silica</term>
<term>Structure</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Silice</term>
<term>Catalyseur</term>
<term>Phase gazeuse</term>
<term>Hydrogénation</term>
<term>Sélectivité catalyseur</term>
<term>Structure</term>
<term>Alcool</term>
<term>Oxyde</term>
<term>Catalyse hétérogène</term>
<term>Cobalt</term>
<term>But-2-énal</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Alcool</term>
<term>Oxyde</term>
<term>Cobalt</term>
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<front><div type="abstract" xml:lang="en">This paper reports on the performance and its relation with the structure of a highly loaded (41 wt.%) Co/SiO<sub>2</sub>
 catalyst in the gas phase hydrogenation of crotonaldehyde when varying the thermal treatments to which the catalyst precursor has been subjected. The optimum calcination and reduction temperatures were identified where the highest selectivity to crotyl alcohol (around 90%) was obtained with the catalyst calcined at 400 °C and reduced at 350 °C even at conversions as high as 60%. Higher temperature of calcination was found to lower the crotyl alcohol selectivity. Both, lower and higher reduction temperatures will not favour the crotyl alcohol formation. These results were interpreted and correlated with the surface structure of the catalyst which was shown by temperature programmed reduction (TPR) and X-ray photoelectron spectroscopy (XPS) analysis. Depending on the thermal conditions imposed, the surface consisted of either Co metal, or coexisting metal and its oxide; structure which favours the high crotyl alcohol selectivity. By TEM analysis, large particles (diameter exceeding 50 nm) were identified after reduction at 350 °C. A global activation energy of 44 kJ/mol was obtained with this catalyst. In the light of the obtained results a discussion on the reaction mechanism involving metal, metal-oxide double sites has been put forward. It was emphasised that, for selective hydrogenation of crotonaldehyde into unsaturated alcohol, Co catalysts compete favourably with platinum based catalysts.</div>
</front>
</TEI>
<inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0926-860X</s0>
</fA01>
<fA03 i2="1"><s0>Appl. catal., A Gen.</s0>
</fA03>
<fA05><s2>282</s2>
</fA05>
<fA06><s2>1-2</s2>
</fA06>
<fA08 i1="01" i2="1" l="ENG"><s1>On the performance of a highly loaded Co/SiO<sub>2</sub>
 catalyst in the gas phase hydrogenation of crotonaldehyde thermal treatments: catalyst structure-selectivity relationship</s1>
</fA08>
<fA11 i1="01" i2="1"><s1>DJERBOUA (F.)</s1>
</fA11>
<fA11 i1="02" i2="1"><s1>BENACHOUR (D.)</s1>
</fA11>
<fA11 i1="03" i2="1"><s1>TOUROUDE (R.)</s1>
</fA11>
<fA14 i1="01"><s1>Département de Génie des Procédés, Faculté des Sciences de l'ingénieur, Université Ferhat Abbas, route de Maaboudah</s1>
<s2>Setif 19000</s2>
<s3>DZA</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
</fA14>
<fA14 i1="02"><s1>LMSPC, UMR 7515 du CNRS ECPM.ULP, 25 rue Becquerel</s1>
<s2>67087 Strasbourg</s2>
<s3>FRA</s3>
<sZ>3 aut.</sZ>
</fA14>
<fA20><s1>123-133</s1>
</fA20>
<fA21><s1>2005</s1>
</fA21>
<fA23 i1="01"><s0>ENG</s0>
</fA23>
<fA43 i1="01"><s1>INIST</s1>
<s2>18840A</s2>
<s5>354000126367680150</s5>
</fA43>
<fA44><s0>0000</s0>
<s1>© 2005 INIST-CNRS. All rights reserved.</s1>
</fA44>
<fA45><s0>39 ref.</s0>
</fA45>
<fA47 i1="01" i2="1"><s0>05-0170318</s0>
</fA47>
<fA60><s1>P</s1>
</fA60>
<fA61><s0>A</s0>
</fA61>
<fA64 i1="01" i2="1"><s0>Applied catalysis. A, General</s0>
</fA64>
<fA66 i1="01"><s0>NLD</s0>
</fA66>
<fC01 i1="01" l="ENG"><s0>This paper reports on the performance and its relation with the structure of a highly loaded (41 wt.%) Co/SiO<sub>2</sub>
 catalyst in the gas phase hydrogenation of crotonaldehyde when varying the thermal treatments to which the catalyst precursor has been subjected. The optimum calcination and reduction temperatures were identified where the highest selectivity to crotyl alcohol (around 90%) was obtained with the catalyst calcined at 400 °C and reduced at 350 °C even at conversions as high as 60%. Higher temperature of calcination was found to lower the crotyl alcohol selectivity. Both, lower and higher reduction temperatures will not favour the crotyl alcohol formation. These results were interpreted and correlated with the surface structure of the catalyst which was shown by temperature programmed reduction (TPR) and X-ray photoelectron spectroscopy (XPS) analysis. Depending on the thermal conditions imposed, the surface consisted of either Co metal, or coexisting metal and its oxide; structure which favours the high crotyl alcohol selectivity. By TEM analysis, large particles (diameter exceeding 50 nm) were identified after reduction at 350 °C. A global activation energy of 44 kJ/mol was obtained with this catalyst. In the light of the obtained results a discussion on the reaction mechanism involving metal, metal-oxide double sites has been put forward. It was emphasised that, for selective hydrogenation of crotonaldehyde into unsaturated alcohol, Co catalysts compete favourably with platinum based catalysts.</s0>
</fC01>
<fC02 i1="01" i2="X"><s0>001C01A03</s0>
</fC02>
<fC03 i1="01" i2="X" l="FRE"><s0>Silice</s0>
<s2>NK</s2>
<s2>FX</s2>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG"><s0>Silica</s0>
<s2>NK</s2>
<s2>FX</s2>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA"><s0>Sílice</s0>
<s2>NK</s2>
<s2>FX</s2>
<s5>01</s5>
</fC03>
<fC03 i1="02" i2="X" l="FRE"><s0>Catalyseur</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG"><s0>Catalyst</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA"><s0>Catalizador</s0>
<s5>02</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE"><s0>Phase gazeuse</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG"><s0>Gas phase</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA"><s0>Fase gaseosa</s0>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE"><s0>Hydrogénation</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG"><s0>Hydrogenation</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA"><s0>Hidrogenación</s0>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE"><s0>Sélectivité catalyseur</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG"><s0>Catalyst selectivity</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA"><s0>Selectividad catalizador</s0>
<s5>05</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE"><s0>Structure</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG"><s0>Structure</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA"><s0>Estructura</s0>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE"><s0>Alcool</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG"><s0>Alcohol</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA"><s0>Alcohol</s0>
<s5>07</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE"><s0>Oxyde</s0>
<s2>NA</s2>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG"><s0>Oxides</s0>
<s2>NA</s2>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA"><s0>Óxido</s0>
<s2>NA</s2>
<s5>08</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE"><s0>Catalyse hétérogène</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG"><s0>Heterogeneous catalysis</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA"><s0>Catálisis heterogénea</s0>
<s5>09</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Cobalt</s0>
<s2>NC</s2>
<s5>12</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG"><s0>Cobalt</s0>
<s2>NC</s2>
<s5>12</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA"><s0>Cobalto</s0>
<s2>NC</s2>
<s5>12</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE"><s0>But-2-énal</s0>
<s4>INC</s4>
<s5>32</s5>
</fC03>
<fC07 i1="01" i2="X" l="FRE"><s0>Enaldéhyde</s0>
<s5>10</s5>
</fC07>
<fC07 i1="01" i2="X" l="ENG"><s0>Enaldehyde</s0>
<s5>10</s5>
</fC07>
<fC07 i1="01" i2="X" l="SPA"><s0>Enaldehido</s0>
<s5>10</s5>
</fC07>
<fC07 i1="02" i2="X" l="FRE"><s0>Métal transition</s0>
<s2>NC</s2>
<s5>11</s5>
</fC07>
<fC07 i1="02" i2="X" l="ENG"><s0>Transition metal</s0>
<s2>NC</s2>
<s5>11</s5>
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<fC07 i1="02" i2="X" l="SPA"><s0>Metal transición</s0>
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On the performance of a highly loaded Co/SiO2 catalyst in the gas phase hydrogenation of crotonaldehyde thermal treatments: catalyst structure-selectivity relationship

On the performance of a highly loaded Co/SiO2 catalyst in the gas phase hydrogenation of crotonaldehyde thermal treatments: catalyst structure-selectivity relationship

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