CobaltMaghrebV1, PascalFrancis, Curation, bibRecord, 000190

Preparation of silica-supported cobalt catalysts from water-in-oil microemulsion for selective hydrogenation of citral

Identifieur interne : 000190 ( PascalFrancis/Curation ); précédent : 000189; suivant : 000191

Preparation of silica-supported cobalt catalysts from water-in-oil microemulsion for selective hydrogenation of citral

Auteurs : K. Kouachi [France, Algérie] ; G. Lafaye [France] ; C. Especel [France] ; O. Cherifi [Algérie] ; P. Marecot [France]

Source :

Journal of molecular catalysis. A, Chemical [ 1381-1169 ] ; 2009.

RBID : Pascal:09-0358438

Descripteurs français

Pascal (Inist)
- Préparation, Silice, Catalyseur sur support, Catalyse hétérogène, Cobalt, Microémulsion eau huile, Hydrogénation, Citral, Alcool, Aldéhyde, SiO2, O Si.
Wicri :
- topic : Cobalt, Alcool.

English descriptors

KwdEn :
- Alcohol, Aldehyde, Citral, Cobalt, Heterogeneous catalysis, Hydrogenation, Preparation, Silica, Supported catalyst, Water oil microemulsion.

Abstract

Silica-supported Co catalysts with different metal loadings were prepared by water-in-oil (w/o) microemulsion (ME) and tested for the selective hydrogenation of citral. The performances of the ME samples were compared to those of previously studied Co impregnated catalysts. Compared to impregnated Co catalysts, ME samples show more homogeneously dispersed Co particles, the crystallite mean size increasing with the Co content. For the ME samples, the selectivity to unsaturated alcohols (i.e. nerol and geraniol) increases with the metal content then reaches a plateau from approximately 15 wt% Co, suggesting that particles of large enough size are required to optimize the C=O group activation. Above 15 wt% Co content, the selectivity is markedly higher on the ME catalysts compared to the impregnated ones (90% versus 45-65% depending on the nature of the support). This result can be directly related to the higher proportion of β H-Co species detected by temperature-programmed desorption of hydrogen (H₂-TPD) on these ME samples.

A01	`01`	`1`		`@0 1381-1169`
A03		`1`		`@0 J. mol. catal., A Chem.`
A05				`@2 308`
A06				`@2 1-2`
A08	`01`	`1`	`ENG`	`@1 Preparation of silica-supported cobalt catalysts from water-in-oil microemulsion for selective hydrogenation of citral`
A11	`01`	`1`		`@1 KOUACHI (K.)`
A11	`02`	`1`		`@1 LAFAYE (G.)`
A11	`03`	`1`		`@1 ESPECEL (C.)`
A11	`04`	`1`		`@1 CHERIFI (O.)`
A11	`05`	`1`		`@1 MARECOT (P.)`
A14	`01`			`@1 Université de Poitiers, Laboratoire de Catalyse en Chimie Organique, UMR 6503 @2 82022 Poitiers @3 FRA @Z 1 aut. @Z 2 aut. @Z 3 aut. @Z 5 aut.`
A14	`02`			`@1 Laboratoire de Chimie de Gaz Naturel, Faculté de Chimie, USTHB, BP 32 @2 16111 El Alia, Bab Euouar @3 DZA @Z 1 aut. @Z 4 aut.`
A20				`@1 142-149`
A21				`@1 2009`
A23	`01`			`@0 ENG`
A43	`01`			`@1 INIST @2 17107A @5 354000187502170180`
A44				`@0 0000 @1 © 2009 INIST-CNRS. All rights reserved.`
A45				`@0 37 ref.`
A47	`01`	`1`		`@0 09-0358438`
A60				`@1 P`
A61				`@0 A`
A64	`01`	`1`		`@0 Journal of molecular catalysis. A, Chemical`
A66	`01`			`@0 NLD`
C01	`01`		`ENG`	@0 Silica-supported Co catalysts with different metal loadings were prepared by water-in-oil (w/o) microemulsion (ME) and tested for the selective hydrogenation of citral. The performances of the ME samples were compared to those of previously studied Co impregnated catalysts. Compared to impregnated Co catalysts, ME samples show more homogeneously dispersed Co particles, the crystallite mean size increasing with the Co content. For the ME samples, the selectivity to unsaturated alcohols (i.e. nerol and geraniol) increases with the metal content then reaches a plateau from approximately 15 wt% Co, suggesting that particles of large enough size are required to optimize the C=O group activation. Above 15 wt% Co content, the selectivity is markedly higher on the ME catalysts compared to the impregnated ones (90% versus 45-65% depending on the nature of the support). This result can be directly related to the higher proportion of β H-Co species detected by temperature-programmed desorption of hydrogen (H₂-TPD) on these ME samples.
C02	`01`	`X`		`@0 001C01A03`
C02	`02`	`X`		`@0 001C01J04`
C03	`01`	`X`	`FRE`	`@0 Préparation @5 01`
C03	`01`	`X`	`ENG`	`@0 Preparation @5 01`
C03	`01`	`X`	`SPA`	`@0 Preparación @5 01`
C03	`02`	`X`	`FRE`	`@0 Silice @2 NK @2 FX @5 02`
C03	`02`	`X`	`ENG`	`@0 Silica @2 NK @2 FX @5 02`
C03	`02`	`X`	`SPA`	`@0 Sílice @2 NK @2 FX @5 02`
C03	`03`	`X`	`FRE`	`@0 Catalyseur sur support @5 03`
C03	`03`	`X`	`ENG`	`@0 Supported catalyst @5 03`
C03	`03`	`X`	`SPA`	`@0 Catalizador sobre soporte @5 03`
C03	`04`	`X`	`FRE`	`@0 Catalyse hétérogène @5 04`
C03	`04`	`X`	`ENG`	`@0 Heterogeneous catalysis @5 04`
C03	`04`	`X`	`SPA`	`@0 Catálisis heterogénea @5 04`
C03	`05`	`X`	`FRE`	`@0 Cobalt @2 NC @5 05`
C03	`05`	`X`	`ENG`	`@0 Cobalt @2 NC @5 05`
C03	`05`	`X`	`SPA`	`@0 Cobalto @2 NC @5 05`
C03	`06`	`X`	`FRE`	`@0 Microémulsion eau huile @5 06`
C03	`06`	`X`	`ENG`	`@0 Water oil microemulsion @5 06`
C03	`06`	`X`	`SPA`	`@0 Microemulsión agua aceite @5 06`
C03	`07`	`X`	`FRE`	`@0 Hydrogénation @5 07`
C03	`07`	`X`	`ENG`	`@0 Hydrogenation @5 07`
C03	`07`	`X`	`SPA`	`@0 Hidrogenación @5 07`
C03	`08`	`X`	`FRE`	`@0 Citral @2 NK @2 FR @5 08`
C03	`08`	`X`	`ENG`	`@0 Citral @2 NK @2 FR @5 08`
C03	`09`	`X`	`FRE`	`@0 Alcool @5 09`
C03	`09`	`X`	`ENG`	`@0 Alcohol @5 09`
C03	`09`	`X`	`SPA`	`@0 Alcohol @5 09`
C03	`10`	`X`	`FRE`	`@0 Aldéhyde @5 12`
C03	`10`	`X`	`ENG`	`@0 Aldehyde @5 12`
C03	`10`	`X`	`SPA`	`@0 Aldehído @5 12`
C03	`11`	`X`	`FRE`	`@0 SiO2 @4 INC @5 32`
C03	`12`	`X`	`FRE`	`@0 O Si @4 INC @5 33`
C07	`01`	`X`	`FRE`	`@0 Composé binaire @5 10`
C07	`01`	`X`	`ENG`	`@0 Binary compound @5 10`
C07	`01`	`X`	`SPA`	`@0 Compuesto binario @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				`@1 257`

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Le document en format XML

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<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Laboratoire de Chimie de Gaz Naturel, Faculté de Chimie, USTHB, BP 32</s1>
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<author><name sortKey="Especel, C" sort="Especel, C" uniqKey="Especel C" first="C." last="Especel">C. Especel</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Université de Poitiers, Laboratoire de Catalyse en Chimie Organique, UMR 6503</s1>
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<s3>FRA</s3>
<sZ>1 aut.</sZ>
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<author><name sortKey="Cherifi, O" sort="Cherifi, O" uniqKey="Cherifi O" first="O." last="Cherifi">O. Cherifi</name>
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<s3>DZA</s3>
<sZ>1 aut.</sZ>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Alcohol</term>
<term>Aldehyde</term>
<term>Citral</term>
<term>Cobalt</term>
<term>Heterogeneous catalysis</term>
<term>Hydrogenation</term>
<term>Preparation</term>
<term>Silica</term>
<term>Supported catalyst</term>
<term>Water oil microemulsion</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Préparation</term>
<term>Silice</term>
<term>Catalyseur sur support</term>
<term>Catalyse hétérogène</term>
<term>Cobalt</term>
<term>Microémulsion eau huile</term>
<term>Hydrogénation</term>
<term>Citral</term>
<term>Alcool</term>
<term>Aldéhyde</term>
<term>SiO2</term>
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<front><div type="abstract" xml:lang="en">Silica-supported Co catalysts with different metal loadings were prepared by water-in-oil (w/o) microemulsion (ME) and tested for the selective hydrogenation of citral. The performances of the ME samples were compared to those of previously studied Co impregnated catalysts. Compared to impregnated Co catalysts, ME samples show more homogeneously dispersed Co particles, the crystallite mean size increasing with the Co content. For the ME samples, the selectivity to unsaturated alcohols (i.e. nerol and geraniol) increases with the metal content then reaches a plateau from approximately 15 wt% Co, suggesting that particles of large enough size are required to optimize the C=O group activation. Above 15 wt% Co content, the selectivity is markedly higher on the ME catalysts compared to the impregnated ones (90% versus 45-65% depending on the nature of the support). This result can be directly related to the higher proportion of β H-Co species detected by temperature-programmed desorption of hydrogen (H<sub>2</sub>
-TPD) on these ME samples.</div>
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<fA11 i1="01" i2="1"><s1>KOUACHI (K.)</s1>
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<fA11 i1="02" i2="1"><s1>LAFAYE (G.)</s1>
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<fA11 i1="03" i2="1"><s1>ESPECEL (C.)</s1>
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</fA11>
<fA14 i1="01"><s1>Université de Poitiers, Laboratoire de Catalyse en Chimie Organique, UMR 6503</s1>
<s2>82022 Poitiers</s2>
<s3>FRA</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>5 aut.</sZ>
</fA14>
<fA14 i1="02"><s1>Laboratoire de Chimie de Gaz Naturel, Faculté de Chimie, USTHB, BP 32</s1>
<s2>16111 El Alia, Bab Euouar</s2>
<s3>DZA</s3>
<sZ>1 aut.</sZ>
<sZ>4 aut.</sZ>
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</fA44>
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<fA47 i1="01" i2="1"><s0>09-0358438</s0>
</fA47>
<fA60><s1>P</s1>
</fA60>
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</fA64>
<fA66 i1="01"><s0>NLD</s0>
</fA66>
<fC01 i1="01" l="ENG"><s0>Silica-supported Co catalysts with different metal loadings were prepared by water-in-oil (w/o) microemulsion (ME) and tested for the selective hydrogenation of citral. The performances of the ME samples were compared to those of previously studied Co impregnated catalysts. Compared to impregnated Co catalysts, ME samples show more homogeneously dispersed Co particles, the crystallite mean size increasing with the Co content. For the ME samples, the selectivity to unsaturated alcohols (i.e. nerol and geraniol) increases with the metal content then reaches a plateau from approximately 15 wt% Co, suggesting that particles of large enough size are required to optimize the C=O group activation. Above 15 wt% Co content, the selectivity is markedly higher on the ME catalysts compared to the impregnated ones (90% versus 45-65% depending on the nature of the support). This result can be directly related to the higher proportion of β H-Co species detected by temperature-programmed desorption of hydrogen (H<sub>2</sub>
-TPD) on these ME samples.</s0>
</fC01>
<fC02 i1="01" i2="X"><s0>001C01A03</s0>
</fC02>
<fC02 i1="02" i2="X"><s0>001C01J04</s0>
</fC02>
<fC03 i1="01" i2="X" l="FRE"><s0>Préparation</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG"><s0>Preparation</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA"><s0>Preparación</s0>
<s5>01</s5>
</fC03>
<fC03 i1="02" i2="X" l="FRE"><s0>Silice</s0>
<s2>NK</s2>
<s2>FX</s2>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG"><s0>Silica</s0>
<s2>NK</s2>
<s2>FX</s2>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA"><s0>Sílice</s0>
<s2>NK</s2>
<s2>FX</s2>
<s5>02</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE"><s0>Catalyseur sur support</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG"><s0>Supported catalyst</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA"><s0>Catalizador sobre soporte</s0>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE"><s0>Catalyse hétérogène</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG"><s0>Heterogeneous catalysis</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA"><s0>Catálisis heterogénea</s0>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE"><s0>Cobalt</s0>
<s2>NC</s2>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG"><s0>Cobalt</s0>
<s2>NC</s2>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA"><s0>Cobalto</s0>
<s2>NC</s2>
<s5>05</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE"><s0>Microémulsion eau huile</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG"><s0>Water oil microemulsion</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA"><s0>Microemulsión agua aceite</s0>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE"><s0>Hydrogénation</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG"><s0>Hydrogenation</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA"><s0>Hidrogenación</s0>
<s5>07</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE"><s0>Citral</s0>
<s2>NK</s2>
<s2>FR</s2>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG"><s0>Citral</s0>
<s2>NK</s2>
<s2>FR</s2>
<s5>08</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE"><s0>Alcool</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG"><s0>Alcohol</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA"><s0>Alcohol</s0>
<s5>09</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Aldéhyde</s0>
<s5>12</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG"><s0>Aldehyde</s0>
<s5>12</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA"><s0>Aldehído</s0>
<s5>12</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE"><s0>SiO2</s0>
<s4>INC</s4>
<s5>32</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE"><s0>O Si</s0>
<s4>INC</s4>
<s5>33</s5>
</fC03>
<fC07 i1="01" i2="X" l="FRE"><s0>Composé binaire</s0>
<s5>10</s5>
</fC07>
<fC07 i1="01" i2="X" l="ENG"><s0>Binary compound</s0>
<s5>10</s5>
</fC07>
<fC07 i1="01" i2="X" l="SPA"><s0>Compuesto binario</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>
</fC07>
<fC07 i1="02" i2="X" l="SPA"><s0>Metal transición</s0>
<s2>NC</s2>
<s5>11</s5>
</fC07>
<fN21><s1>257</s1>
</fN21>
</pA>
</standard>
</inist>
</record>

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	Serveur d'exploration sur le cobalt au Maghreb
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Serveur d'exploration sur le cobalt au Maghreb

Preparation of silica-supported cobalt catalysts from water-in-oil microemulsion for selective hydrogenation of citral

Preparation of silica-supported cobalt catalysts from water-in-oil microemulsion for selective hydrogenation of citral

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