Study On The Adsorption Of Ethylene Ethane Separation

A research into adsorbents used for separating ethylene from fluid catalyticcracking（FCC） dry gas was made. The dynamic adsorption apparatus was adopted toselect suitable adsorbents for separating ethylene from ethane/ethane mixture. In thisthesis,CuCl/4A,CuCl/γ-Al₂O₃and AgNO₃/γ-Al₂O₃were studied separately. Theinvestigation focused on the Cu-based activated carbon adsorbents with CuCl₂asprecursor and activated carbon made in Chengde as carrier. Investigation was carried outon the influence of calcination temperature, calcinations time, pretreatment condition andCuCl₂loadings on separation results. It showed that the calcinations has little influence onadsorbents,350℃,8hours was the suitable calcination conditions; calcination during thepretreatment process has no effect on the adsorbents; the equilibrium adsorbed amount forC₂H₄and C₂H₆decreased with the increasing of CuCl₂loadings, while the selectivity ofC₂H₄increased. The comparison between the incipient wetness and mechanic muddlingshowed that the incipient wetness gives better separation results. It also revealed that theBET surface decrease sharply as CuCl₂was soaked on activated carbon, and thisphenomena was related to the decrease of total adsorption amount for C₂H₆/C₂H₄.