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A Comparative Study of Surface Characteristics of Nickel Supported on Silica Gel, γ-Alumina, Aluminosilicate

Abstract Surface characteristics of the prepared nickel catalysts containing 7, 10, and 13 wt% Ni w/w over different supports—silica gel, γ-alumina, and aluminosilicate—were investigated. Surface areas, total pore volumes, and average pore radii were determined for all catalysts. Pore analysis was discussed based on Vl-t plots and pore size distribution. The measured surface areas and pore volumes of pure supports increased in the following order: γ-alumina < aluminosilicate < silica gel. Pore analysis showed that SiO2 and Al2O3-SiO2 and their supported Ni samples were characterized by presence of narrower mesopores of ink-bottle type. Al2O3 was distinguished by presence of two distinct pore types, both showing continual increase in fraction with a shift to larger dimensions upon loading with nickel. Penetration and/or incorporation process of Ni particles took place at the expense of their interaction with Al+3. SiO2 revealed a gradual increase in surface parameters upon loading with nickel. For Al2O3-SiO2—supported samples, the result proposed the interaction of Ni with both alumina and silica contents of the support regardless of the penetration process.