Study of the effect of the nature of the carrier gas on retention volumes and differential molar changes of internal energy during adsorption on some porous polymers

Summary

Corrected retention volumes V _R1 and differential molar changes of internal energy$- \overline {\Delta U_1 }$ during adsorption of substances of different classes on weakly specific and specific porous polymers have been measured by a gas chromatographic method using helium, sulphur hexafluoride, carbon dioxide and water vapour as carrier gases. The use of adsorbable carrier gases results in a marked decrease in$- \overline {\Delta U_1 }$ values; moreover, the effect of carrier gas is the greater the stronger it can be adsorbed on the porous polymer. Among carrier gases investigated water vapour has the greatest effect on V _R1 and$- \overline {\Delta U_1 }$ values. Therefore, it was studied in detail.