Evaluation of the n-nonane preadsorption method with a well characterized model adsorbent: Silicalite-i

Abstract

The n-nonane preadsorption technique is analysed here, using a well characterized model adsorbent: silicalite-I. Controlled Rate - Evolved Gas Analysis allows the precise quantity of n-nonane retained to be known. In this case the n-nonane totally blocks the microporous channels of silicalite-I without allowing diffusion of the adsorbate. Quasi-equilibrium microcalorimetry shows that the adsorbent nature is not modified by the n-nonane and also supplies supplementary information on previously noted argon and nitrogen adsorbate transitions. However, initial desorption of the n-nonane renders certain void regions of the microporous network inaccessible to the adsorbate. © 1993 IUPAC