Abstract:
X-Ray diffraction (XRD) analysis of Nickel catalyst on thoria modified silica support has been carried out to determine its surface characteristics. The activity of supported metal catalyst depends much on the rare earth and actinide metal oxide used as additives. In this case the catalyst, support is prepared from silica support made from Aerosil 200. This support is then modified by thorium oxide as an additive in Th/Si mole ratio of 0,0. 0036, 0. 0061, 0. 0154, 0. 031, 0. 049, 0. 071 by pore volume impregnation. 10% Ni was loaded as catalyst on this modifted support. BET area of this support has been measured 4,s preliminary check up of spread of catalyst on modified support. It ranged from 208 m4/g to 156 m4/g for 10% Ni catalyst. X-Ray diffraction study has been carried out on Diano XRD-6 diffractometer equipped with Cuka radiation. The XRD spectra of several Ni- thorium catalysts on silica surface show presence of NiO in Th-free catalysts. Increasing Th contents of carrier leads to progressive disappearance of diffraction peaks characteristics of NiO phase. The latter can not be detected in the Th-rich samples. Th02 phase has been identified in all catalysts: No line which may be attributed to new compound between nickel oxide, thorium oxide, or silica have been found. Graphs have been plotted between Th/Si ratio and NiO peak area and Th/Si ratio and Th02 peak.
Page(s):
24-28
DOI:
DOI not available
Published:
Journal: Mehran University Research Journal of Engineering and Technology, Volume: 11, Issue: 2, Year: 1992