Effects of support and metal loading on the characteristics of Co based catalysts for selective hydrogenation of citral
Identifieur interne : 000160 ( PascalFrancis/Curation ); précédent : 000159; suivant : 000161Effects of support and metal loading on the characteristics of Co based catalysts for selective hydrogenation of citral
Auteurs : K. Kouachi [France, Algérie] ; G. Lafaye [France] ; C. Especel [France] ; O. Cherifi [Algérie] ; P. Mardcota [France]Source :
- Journal of molecular catalysis. A, Chemical [ 1381-1169 ] ; 2008.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Cobalt.
English descriptors
- KwdEn :
Abstract
Silica-, alumina- and titania-supported Co catalysts with different metal loadings were tested for selective citral hydrogenation in liquid phase. Temperature programmed desorption of hydrogen (H2-TPD) indicated that the catalysts with the highest unsaturated alcohols selectivities present particular H-Co species. Electron diffraction and XRD measurements revealed that these species would be linked to the presence of Co0 hexagonal phase. According to the results obtained by TEM and cyclohexane dehydrogenation, these two properties would be present on large Co particles.
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<author><name sortKey="Lafaye, G" sort="Lafaye, G" uniqKey="Lafaye G" first="G." last="Lafaye">G. Lafaye</name>
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<author><name sortKey="Especel, C" sort="Especel, C" uniqKey="Especel C" first="C." last="Especel">C. Especel</name>
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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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<series><title level="j" type="main">Journal of molecular catalysis. A, Chemical</title>
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<idno type="ISSN">1381-1169</idno>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aldehyde</term>
<term>Alumina</term>
<term>Carbon monoxide</term>
<term>Catalyst</term>
<term>Citral</term>
<term>Cobalt</term>
<term>Heterogeneous catalysis</term>
<term>Hydrogenation</term>
<term>Silica</term>
<term>Support</term>
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<term>Titanium oxide</term>
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<term>Cobalt</term>
<term>Silice</term>
<term>Alumine</term>
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<front><div type="abstract" xml:lang="en">Silica-, alumina- and titania-supported Co catalysts with different metal loadings were tested for selective citral hydrogenation in liquid phase. Temperature programmed desorption of hydrogen (H<sub>2</sub>
-TPD) indicated that the catalysts with the highest unsaturated alcohols selectivities present particular H-Co species. Electron diffraction and XRD measurements revealed that these species would be linked to the presence of Co<sup>0</sup>
hexagonal phase. According to the results obtained by TEM and cyclohexane dehydrogenation, these two properties would be present on large Co particles.</div>
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<fC01 i1="01" l="ENG"><s0>Silica-, alumina- and titania-supported Co catalysts with different metal loadings were tested for selective citral hydrogenation in liquid phase. Temperature programmed desorption of hydrogen (H<sub>2</sub>
-TPD) indicated that the catalysts with the highest unsaturated alcohols selectivities present particular H-Co species. Electron diffraction and XRD measurements revealed that these species would be linked to the presence of Co<sup>0</sup>
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<fC02 i1="01" i2="X"><s0>001C01A03</s0>
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<s2>FX</s2>
<s5>02</s5>
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<s2>FX</s2>
<s5>02</s5>
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<s2>NK</s2>
<s2>FX</s2>
<s5>02</s5>
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<s5>03</s5>
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<s5>03</s5>
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<s5>03</s5>
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<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>Citral</s0>
<s2>NK</s2>
<s2>FR</s2>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG"><s0>Citral</s0>
<s2>NK</s2>
<s2>FR</s2>
<s5>05</s5>
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<fC03 i1="06" i2="X" l="FRE"><s0>Cobalt</s0>
<s2>NC</s2>
<s5>06</s5>
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<s5>06</s5>
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<s5>06</s5>
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<s2>NK</s2>
<s2>FX</s2>
<s5>08</s5>
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<fC03 i1="07" i2="X" l="ENG"><s0>Silica</s0>
<s2>NK</s2>
<s2>FX</s2>
<s5>08</s5>
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<fC03 i1="07" i2="X" l="SPA"><s0>Sílice</s0>
<s2>NK</s2>
<s2>FX</s2>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE"><s0>Alumine</s0>
<s2>NK</s2>
<s5>09</s5>
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<fC03 i1="08" i2="X" l="ENG"><s0>Alumina</s0>
<s2>NK</s2>
<s5>09</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA"><s0>Alúmina</s0>
<s2>NK</s2>
<s5>09</s5>
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<fC03 i1="09" i2="X" l="FRE"><s0>Oxyde de titane</s0>
<s5>10</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG"><s0>Titanium oxide</s0>
<s5>10</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA"><s0>Titanio óxido</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Catalyseur sur support</s0>
<s5>11</s5>
</fC03>
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<s5>11</s5>
</fC03>
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<s5>11</s5>
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<s5>12</s5>
</fC03>
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<s5>12</s5>
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<s5>13</s5>
</fC03>
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<s5>13</s5>
</fC03>
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<s5>13</s5>
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<s5>07</s5>
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<s2>NC</s2>
<s5>07</s5>
</fC07>
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<s2>NC</s2>
<s5>07</s5>
</fC07>
<fN21><s1>147</s1>
</fN21>
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