Abstract
A model of thermochemical synthesis of a microporous carbon adsorbent of silicon carbide is developed. Isotherms of absolute adsorption of n-pentane on an AUK microporous carbon adsorbent of SiC with a narrow pore size distribution are measured in the pressure range of 1 Pa to 50 kPa and in the temperature interval of 243–393 K. The parameters of adsorption equilibrium of the adsorption isostere calculated in the same range are adequately approximated by straight lines. The differential molar isosteric heat of adsorption of n-pentane on the AUK adsorbent decreases of 58-46 kJ/mol in the whole region of micropore filling; this fact counts in favor of energetic heterogeneity in the micropores, which presumably appears in the process of thermochemical synthesis of the microporous carbon adsorbent of silicon carbide.
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