Thermodynamic parameters of adsorption of adamantane and its derivatives on graphitized thermal carbon black |
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| Authors: | Kudryashov S Yu Onuchak L A Voronkov A V Buryak A K Moiseev I K |
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| Institution: | (1) Samara State University, 1 ul. Akad. Pavlova, 443011 Samara, Russian Federation;(2) Institute of Physical Chemistry, Russian Academy of Sciences, 31 Leninsky prosp., 117915 Moscow, Russian Federation;(3) Samara State Technical University, 141 ul. Galaktionovskaya, 443010 Samara, Russian Federation |
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| Abstract: | The adsorption equilibrium constants for adamantane, 1-fluoro-, 1-chloro-, 1,3-difluoro-, 1,3-dichloro-, 1,3-dibromo-, and 1-hydroxyadamantane, and methyl 1-adamantyl ketone were determined by gas chromatography. The results were compared with molecular statistical calculations based on the known atomic-atomic potentials of the interaction of atoms of the sorbate molecule with the C atom of graphitized thermal carbon black (GTCB). The experimental adsorption heats exceed the calculated values by 3-10 kJ mol-1. The reasons for this divergence are discussed. The changes in the adsorption entropy show that the molecules of the studied compounds form a layer of the ideal dimeric gas on the GTCB surface upon adsorption. |
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| Keywords: | adamantane derivatives adsorption graphitized thermal carbon black molecular statistical calculations |
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