Abstract
Sorption of methane, ethane, ethylene and carbon dioxide in NaX, NaY, HY, CeNaY, KL, HKL, NaM, and HM zeolites at 303–473 K has been investigated using a gas chromatography pulse technique. The zeolites have been compared for the heat of sorption of the sorbates at near-zero sorbate loading and also for the specific retention volume (or thermodynamic sorption equilibrium constant) of ethane, ethylene, and carbon dioxide relative to that of methane.