Serveur d'exploration sur le cobalt au Maghreb

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Catalytic behaviour of cobalt exchanged hydroxyapatite in the oxidative dehydrogenation of ethane

Identifieur interne : 000196 ( France/Analysis ); précédent : 000195; suivant : 000197

Catalytic behaviour of cobalt exchanged hydroxyapatite in the oxidative dehydrogenation of ethane

Auteurs : K. Elkabouss [Maroc, France] ; M. Kacimi [Maroc] ; M. Ziyad [Maroc] ; F. Bozon-Verduraz [France]

Source :

RBID : Pascal:05-0362696

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Abstract

Several samples of exchanged cobalt/calcium (Co2+/Ca2+) hydroxyapatite were synthesized and characterised by XRD, IR and UV-visible spectroscopy. The level of Co2+/Ca2+ exchanged was limited to 1.35 wt% of Co and the Co2+ ions incorporated in the phosphate matrix were mainly hosted by octahedral sites. The catalytic activity of these materials was measured in the oxidative dehydrogenation of ethane into ethylene in the 450-550°C range. The global conversion and the ethylene yield increase with temperature and depend upon the cobalt content. They reached 35% and 22% at 550°C respectively for a Co wt% of about 1%.


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Le document en format XML

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<term>Alkane</term>
<term>Calcium Ions</term>
<term>Cobalt Ions</term>
<term>Dehydrogenation</term>
<term>Ethane</term>
<term>Ethylene</term>
<term>Heterogeneous catalysis</term>
<term>Hydrocarbon</term>
<term>Hydroxyapatite</term>
<term>Infrared spectrometry</term>
<term>Ion exchange</term>
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<term>Apatite hydroxylée</term>
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<term>Catalyse hétérogène</term>
<term>Déshydrogénation</term>
<term>Oxydation</term>
<term>Ethane</term>
<term>Hydrocarbure</term>
<term>Alcane</term>
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<div type="abstract" xml:lang="en">Several samples of exchanged cobalt/calcium (Co
<sup>2+</sup>
/Ca
<sup>2+</sup>
) hydroxyapatite were synthesized and characterised by XRD, IR and UV-visible spectroscopy. The level of Co
<sup>2+</sup>
/Ca
<sup>2+</sup>
exchanged was limited to 1.35 wt% of Co and the Co
<sup>2+</sup>
ions incorporated in the phosphate matrix were mainly hosted by octahedral sites. The catalytic activity of these materials was measured in the oxidative dehydrogenation of ethane into ethylene in the 450-550°C range. The global conversion and the ethylene yield increase with temperature and depend upon the cobalt content. They reached 35% and 22% at 550°C respectively for a Co wt% of about 1%.</div>
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