Abstract
Permeation measurements were evaluated to aid in the investigation of surface-transport rates for propane, n-butane, n-pentane, n-hexane and krypton in a platinum—alumina pill. The surface transport of the hydrocarbons follows an equation derived for the case of dissociative adsorption of the migrating gas. Surface mobility decreases with increasing chain length. Activation energies increase from propane to pentane and are somewhat larger than the corresponding heats of adsorption. Krypton follows an equation equivalent to the laws proposed by Babbitt and by Gilliland but here restricted to monoadsorbed gases. It is suggested that the derivation of the latter equation shown in this work may be preferable to that of Babbitt and Gilliland, because it points out the importance of the specific interaction between adsorbate and solid surface.
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