ie7b03579_si_001.pdf (884.43 kB)
Effects of Zeolitic Parameters and Irradiation on the Retention Properties of Silver Zeolites Exposed to Molecular Iodine
journal contribution
posted on 2018-01-11, 00:00 authored by Bruno Azambre, Mouheb Chebbi, Olivia Leroy, Laurent CantrelWe
have investigated the iodine retention behavior of silver zeolite
sorbents under a variety of conditions. First, a preliminary study
was achieved for the liquid phase in order to determine (i) the main
kinetic and thermodynamic characteristics pertaining to the adsorption
behavior and (ii) the influence of some zeolitic parameters (nature
of the framework, silver content, preparation method, etc.) on the
adsorption capacities. Thanks to the online monitoring of gas-phase
I2 concentrations by UV–vis spectroscopy, the iodine
dynamic adsorption/desorption behavior of some selected sorbents was
then studied at 100 °C. It was found that faujasite sorbents
with silver content higher than 20 wt % could maintain a high working
capacity (up to 330 mg/g) and present a high ability for irreversible
trapping. Finally, the stability of trapped iodine species was evidenced
using additional tests performed at 120 °C in the presence of
irradiation and humidity.