Investigation of the adsorption of halogenated hydrocarbons .4. Gas chromatographic evaluation of the zero adsorption heats on an adsorber resin

Using the technique of solid-gaschromatography, the zero adsorption heats Q(0) were determined for six halogenated hydrocarbon (R11, R12, R13 et al.) and CH4 (for comparison) on a porous adsorber resin. The substitution of H- by F-atoms results in an increase of the Q(0)-values as well as the substitution of F- by Cl-atoms in CF4. Simple equations are presented for the dependence of the zero adsorption heats on molar refraction, the number of Cl-atoms and the heats of vapourisation of the CFC's respective on the critical parameters of the adsorptives investigated. Calculated incremental heat values for the C-, H-, F- and Cl-atoms allow for the estimation of the Q(0)-values for different chloro- and fluorochlorohydrocarbons with sufficient accuracy for technical purposes. The experimental results are compared with gaschromatographic data found an activated carbon.