ADSORPTION OF SULFUR HEXAFLUORIDE ON 13X ZEOLITE MODIFIED BY METAL CATION EXCHANGE

Abstract

The sodium cations of 13X zeolite were replaced by Zn2+, Co2+, Ni2+ and Cu2+ cations contained in the various concentration of nitrate salts solutions. XRD and SEM analysis shows that the cationic exchange process is accompanied by a textural damage for the cation-exchanged 13X zeolites, especially, in the case of Ni2+ and Cu2+-exchanged 13X zeolites. Investigation of SF6 adsorption indicates that the SF6 removal efficiency and quantity adsorbed depend on the metal cations, the concentration of nitrate salts solution, the SF6 concentration as well as the rate of SF6 flow. In which, the SF6 removal efficiency is only obtained 99% for the Co2+, Zn2+-exchanged zeolites, and the highest SF6 adsorbed quantity is 1.34 mg/g for 0.03CoX exchanged zeolite and 0.827 mg/g for 0.05ZnX exchanged zeolite, respectively.

Keywords: Sulfur hexafluoride, 13X zeolite, ion-exchange, adsorption, modified.