Dispersion of MoO3, NiO, ZnO on rutile TiO2 with low specific surface area wasstudied with Mercury Porosimeter, SEM, XPS and Ammonia Extraction method. The dispersionthresholds of MoO3, NiO, ZnO on three rutile TiO2 carriers were obtained with XPS, and com-pared with those on anatase TiO2 with high specific surf are area. Ammonia Extraction methodwas used to identify the surface oxide species interarting with support surface in different strengthand it was found that the proportions of oxides that can not be extrarted by ammonia extractionare different for MoO3, NiO and ZnO which are supported on rutile TiO2.
Dispersion of MoO3 on low specific surface area support α-Al2O3 was studied withBET, SEM, XPS, XRD and LRS. The dispersion capacity of MoO3 on α-Al2O3 obtained by XPSand XRD are 0.15gMoO3/100m2 α-Al2O3 surface for α-Al2O3 obtained by calcinating γ-Al2O3 at1300℃ and 1200℃ and 0. 17gMoO3/100m2 α-Al2O3 for γ-Al2O3 obtained by calcinating γ-Al2O3at
