In situ x-ray diffraction studies of carbon oxydation catalysed by Mo, Co, Ni and their mixtures

Direct in-situ observation of the metal catalyzed gasification of graphite under the electron microscope has been reported. Information about the microstructure and nature of the phases using ex-situ X-ray diffraction (XRD) and electron microscopy has been presented (3-6). Ex-situ microstructure observation, however, gives rise to uncertainity. In this report on in-situ X-ray diffraction. Experiments indicate that (a) The bulk phases observed under Mo, Ni and Co catalysed active carbon gasification by oxygen were MoO₃, NiO and Co₃O₄, respectively. (b) In the case of Ni and Co, the mode of addition of the catalyst (impregnation of mechanical mixing) is irrelevant. XRD patterns and kinetic behaviour are the same.