Collect. Czech. Chem. Commun. 1987, 52, 672-677

Modelling of impregnation of γ-alumina with cobalt and molybdenum salts. Co(NO3)2-(NH4)2MoO4-γ-alumina (chloride type) system

Jiří Hanika, Vladimír Janoušek and Karel Sporka

Department of Organic Technology, Prague Institute of Chemical Technology, 166 28 Prague 6


The kinetics of one-component and two-component impregnation of γ-alumina (prepared from aluminium trichloride) with aqueous solutions of cobalt nitrate and ammonium molybdate were studied and treated in terms of a mathematical model accounting for the simultaneous diffusion and adsorption of the active components. The time-dependent radial concentration profiles of the components across the cylindrical support particle were obtained. The profiles of the cobalt-to-molybdenum atomic ratio were derived from the results. The conclusions are applicable to the development of procedures for the preparation of hydrodesulphuration catalysts for the working of crude oil fractions.