Characterization of modified crystalline iron nickel catalysts by XRD, SEM, TGA, DSC and BET methods

Crystalline iron nickel oxides were prepared using co-precipitation procedure and studied for the conversion of synthesis gas to light olefins. In particular, the effect of a range of preparation variables such as [Fe]/[Ni] molar ratios of the precipitation solution, precipitate aging time, were investigated in detail. The results are interpreted in terms of the structure of the active crystalline catalyst and it has been generally concluded that the catalyst containing 40%Fe/60%Ni-on molar basis and aged for 3h the is optimum catalyst. Characterization crystalline catalysts by powder X-ray diffraction, scanning electron microscopy (SEM), BET specific surface area and thermal analysis methods such as TGA and DSC showed that all the molar ratios of and [Fe]/[Ni] and aging time influenced the crystalline structure and morphology.

Keywords:

Co-precipitation , crystalline , iron nickel oxide