Abstract
The CuIY, CeIVY, and CuICeIVY zeolites were successfully prepared and the competive adsorptions of toluene, cyclohexene, and pyridine were investigated. The results indicate that the effects on the metal ion-exchanged Y zeolites for sulfur removal decrease in the order pyridine > cyclohexene > toluene. The CuICeIVY not only has high sulfur adsorption capacity, similar to CuIY, but also has high selectivity for sulfur compounds, similar to CeIVY. The isotherms and kinetics of benzothiophene (BT) adsorption from 1-octane onto CuICeIVY were studied, and the thermodynamic parameters (ΔG, ΔH, ΔS) for the adsorption of BT were calculated. The results show that the isothermal equilibrium can be represented by the Langmuir model and that maximum adsorption capacities (qm) increase with an increase of temperature. The kinetics for the adsorption process can be described by either the Langmuir model or a pseudo-first-order model. The adsorption is spontaneous and exothermic.
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