Hydrogen sulfide adsorption by thermally treated cobalt (II)-exchanged NaX zeolite

Abstract

The faujasite framework structure and the morphological properties of Co 2+ -exchanged NaX zeolite were maintained when samples were treated at a temperature ≤600℃, but were distorted at higher temperature. The cobalt (II) exchange and thermal treatment processes significantly improved the H 2 S adsorption capacity of the NaX zeolite and the highest values were 4.24 mg g −1 for 0.10-CoX-600 and 4.42 mg g −1 for 0.15-CoX-600. Moreover, the first-order adsorption kinetic showed a relatively good fit when applied to the experimental data for the H 2 S adsorption process.