(327f) Co-Adsorption of Iodine and Water By Reduced Silver-Exchanged Mordenite
Single-layer Ag0Z adsorption experiments were performed to obtain both kinetics and equilibrium data of co-adsorption using continuous-flow adsorption systems. The temperature studied is 150oC which is the optimal adsorption temperature for iodine adsorption on Ag0Z. The ranges of water concentration in terms of dew point and iodine concentration in the gas streams studied are -40 â?? 0 oC and 10 â?? 50 ppmv, respectively. It is found that the adverse impact of water on the iodine capacity of Ag0Z increases with the increasing water concentration. The reasons could be a) blocking of pores by water molecules and b) possible deactivation of Ag0 at the presence of water. Detailed mechanisms are being studied. The co-adsorption equilibrium data are used to validate the predictions made by the multi-component adsorption model -GPAST (Generalized Predictive Adsorption Solution Theory) - with parameters obtained from single-component adsorption. Work is also in progress to study the kinetics of the co-adsorption process with multi-component kinetic models and to determine the mechanisms of the co-adsorption process. The results will be compared with the single-component adsorption kinetics to determine the impact of water on the kinetics of iodine adsorption.
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