Abstract

1. The model of the stoichiometric orbital cluster and the nonempirical PRDDO method have been employed to calculate the indices of acidity and basicity of the surface sites of SiO2, Al/SiO2, and γ-Al2O3. 2. A ranking has been constructed and discussed for the change in the acid and base properties of the surface structures of different types of the adsorbents studied.

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