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ag -exchanged resins are prepared and studied for ethylene/ethane separation by adsorption. on ag -exchanged s9, at 25℃ and 0.1013mpa, the equilibrium adsorbed amount for c2h4 is 0.992mmol.g-1, and the adsorption ratio for c2h4/c2h6 is 3.56. the adsorption capacity can be restored almost completely at 25℃ and 75℃, and the desorption residual amount is less than 0.01mmol.g-1. for the adsorption consisting of physical adsorption and 7r-complexation with energy heterogeneity, the equilibrium data are correlated with langmuir-fyeundlich isotherm equation. furthermore, the heat of adsorption and the overall diffusion time constants are calculated from the experimental data. considering all the adsorption characteristics, the application potential for industrial adsorption process is discussed.