| Abstract
| - In this study, the adsorption equilibria and kinetics of pure propane (C3H8) and propylene (C3H6) onnatural erionite (ERI), from Agua Prieta (Sonora, Mexico), and on cation-exchanged erionite samples(K-ERI and Ag-ERI) have been measured at different temperatures using a glass high-vacuum volumetricdevice. All of the samples showed selectivity toward propylene. The ion-exchange treatment influenced,remarkably, the C3H8 and C3H6 adsorption behaviors. The adsorbed amounts of both hydrocarbons onK-ERI and Ag-ERI samples were lower than those on ERI, a result that can be ascribed to a decrease inmicropore volume. It was established that the adsorptive separation of these gases on K-ERI could beeffected most efficiently at 111 °C for gas−adsorbent contact times in the range 20−100 s, whereas theAg-ERI sample could be recommended for this separation for the temperature range 50−80 °C and forshort gas−adsorbent contact times in the interval 10−30 s.
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