Based CoMo sulphided catalysts supported on hydroxyapatite: Dimethyldisulphide (DMDS) hydrogenolysis
Identifieur interne : 000131 ( Maroc/Analysis ); précédent : 000130; suivant : 000132Based CoMo sulphided catalysts supported on hydroxyapatite: Dimethyldisulphide (DMDS) hydrogenolysis
Auteurs : Y. Saih [Maroc] ; M. Ait Chaoui [Maroc] ; A. Ezzamarty [Maroc] ; M. Lakhdar [Maroc]Source :
- Catalysis Communications [ 1566-7367 ] ; 2001.
Abstract
A series of Ca-deficient and Co-containing hydroxyapatite samples, noted Ar and Cx, respectively, where r is the total Ca/P molar ratio (r=1.46–1.62) and x the Co wt%, were prepared by precipitation in aqueous media. The catalytic activities of CoMo/Ar and Mo/Cx sulphided catalysts have been examined for the S–S bond hydrogenolysis of dimethyldisulphide (DMDS) under relatively mild operating conditions (200°C, 1 atm). The overall activity depends on the Co depositing mode and the hydroxyapatite carrier Ca/P molar ratio. Depositing Co by impregnation on hydroxyapatite samples with low Ca/P molar ratios involves an increase of the catalytic activity until approaching that corresponding to CoMo/Al2O3 catalyst. This can be attributed probably to a better dispersion of the CoMo sulphided catalysts on apatitic carrier with low Ca/P molar ratios. DMDS is selectively reduced to CH3SH on the CoMo/A1,46 sulphided catalyst than on the CoMo/Al2O3 one, even at conversions as higher as 100%.
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DOI: 10.1016/S1566-7367(01)00007-3
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Saih</name><affiliation wicri:level="1"><country xml:lang="fr">Maroc</country><wicri:regionArea>Faculté des Sciences, Laboratoire de Catalyse Hétérogène, Université HASSAN II Aı̈n Chock, BP 5366 Maârif, Casablanca</wicri:regionArea><wicri:noRegion>Casablanca</wicri:noRegion></affiliation><affiliation></affiliation></author><author><name sortKey="Ait Chaoui, M" sort="Ait Chaoui, M" uniqKey="Ait Chaoui M" first="M." last="Ait Chaoui">M. Ait Chaoui</name><affiliation wicri:level="1"><country xml:lang="fr">Maroc</country><wicri:regionArea>Faculté des Sciences, Laboratoire de Catalyse Hétérogène, Université HASSAN II Aı̈n Chock, BP 5366 Maârif, Casablanca</wicri:regionArea><wicri:noRegion>Casablanca</wicri:noRegion></affiliation></author><author><name sortKey="Ezzamarty, A" sort="Ezzamarty, A" uniqKey="Ezzamarty A" first="A." last="Ezzamarty">A. 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The catalytic activities of CoMo/Ar and Mo/Cx sulphided catalysts have been examined for the S–S bond hydrogenolysis of dimethyldisulphide (DMDS) under relatively mild operating conditions (200°C, 1 atm). The overall activity depends on the Co depositing mode and the hydroxyapatite carrier Ca/P molar ratio. Depositing Co by impregnation on hydroxyapatite samples with low Ca/P molar ratios involves an increase of the catalytic activity until approaching that corresponding to CoMo/Al2O3 catalyst. This can be attributed probably to a better dispersion of the CoMo sulphided catalysts on apatitic carrier with low Ca/P molar ratios. DMDS is selectively reduced to CH3SH on the CoMo/A1,46 sulphided catalyst than on the CoMo/Al2O3 one, even at conversions as higher as 100%.</div></front></TEI><affiliations><list><country><li>Maroc</li></country></list><tree><country name="Maroc"><noRegion><name sortKey="Saih, Y" sort="Saih, Y" uniqKey="Saih Y" first="Y." last="Saih">Y. Saih</name></noRegion><name sortKey="Ait Chaoui, M" sort="Ait Chaoui, M" uniqKey="Ait Chaoui M" first="M." last="Ait Chaoui">M. Ait Chaoui</name><name sortKey="Ezzamarty, A" sort="Ezzamarty, A" uniqKey="Ezzamarty A" first="A." last="Ezzamarty">A. Ezzamarty</name><name sortKey="Lakhdar, M" sort="Lakhdar, M" uniqKey="Lakhdar M" first="M." last="Lakhdar">M. Lakhdar</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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