Oxidative dehydrogenation of propane over chromium-loaded calcium-hydroxyapatite

@inproceedings{Boucetta2009OxidativeDO,
  title={Oxidative dehydrogenation of propane over chromium-loaded calcium-hydroxyapatite},
  author={Charifa Boucetta and Mohamed Kacimi and Alain Ensuque and Jean-Yves Piquemal and François Bozon-Verduraz and Mahfoud Ziyad},
  year={2009}
}
Abstract Chromium-loaded hydroxyapatite catalysts Cr( x )/CaHAp (0.1 ≤  x  ≤ 3.7 wt.% Cr) were prepared by ion-exchange and characterized by several techniques including FTIR, Raman, XPS, UV–vis-NIR spectroscopies, EPR, DRX and TPR. After calcination in air, several isolated chromium species were identified: (i) surface Cr 3+ ions in distorted octahedral symmetry, (ii) bulk octahedral Cr 3+ ions, (iii) octahedral Cr 5+ ions in low concentration and (iv) Cr 6+ ions. Cr 6+ ions present as… CONTINUE READING

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