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

K. Elkabouss; M. Kacimi; M. Ziyad; F. Bozon-Verduraz

doi:doi:10.1051/jp4:2005123056

Numéro		J. Phys. IV France Volume 123, March 2005


Page(s)		313 - 317
DOI		https://doi.org/10.1051/jp4:2005123056

J. Phys. IV France 123 (2005) 313-317
DOI: 10.1051/jp4:2005123056

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

K. Elkabouss^{1, 2}, M. Kacimi¹, M. Ziyad¹ and F. Bozon-Verduraz²

¹ Laboratoire de Physico-Chimie des Matériaux et Catalyse, Faculté des Sciences, Département de Chimie, Rabat, Maroc
² Groupe de Chimie des Matériaux Divisés et Catalyse, ITODYS, UMR-CNRS 7086, Université Paris 7-Denis Diderot, 2 place Jussieu, 75251 Paris, France

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 $^{\circ}$ 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 $^{\circ}$ C respectively for a Co wt% of about 1%.