Abstract
1. On Cr2O3 containing Cr2+ ions, C2-C6 paraffin hydrocarbons are adsorbed rapidly and reversibly at temperatures below 100°. The heats of adsorption at low degrees of surface coverage are 1.5–2 times as great as the heat of nonspecific physical adsorption of paraffins on other oxides. As the surface of Cr2O3 is covered, the heat of adsorption decreases. 2. At temperatures above 100° on the investigated sample of Cr2O3, against a background of equilibrium adsorption, there is an activated irreversible chemisorption. 3. Equilibrium adsorption of paraffins with increased heats and irreversible chemisorption occur on Cr2+ions. 4. It was hypothesized that the increase in the adsorption of n-C6H14 after γ irradiation of Gr2O3is associated with the formation of supplementary amounts of Cr2+ions after the capture of electrons by Cr3+ ions.
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