Textural Analysis of Sulphated ZrO2–SiO2 Sol–Gel Catalytic Supports by N2 Sorption and X-Ray Diffraction

摘要: The textural properties of sulphated ZrO2-SiO2 catalytic supports different compositions were investigated through N2 sorption and X-ray diffraction (conventional SAXS) methods. materials synthesised by the sol-gel procedure from a mixture zirconium(IV) tert-butoxide tetraethyl orthosilicate. final products obtained after drying at 125oC followed calcination 400oC. porous structures substrates found to depend on their composition: low zirconia contents these formed slit cavities while high ZrO2 concentrations void structure became open; both necks similar size. In first case, pore size distribution function could be an analysis ascending boundary curve isotherm since adsorption occurred flat surface. second unique pore-size was either or descending curves isotherm. A tubular geometry seemed approp...