Materials
The Ag0Z used for this study was prepared by reducing
the commercial AgZ (IONEX-Type, Ag-900 E16, Molecular Products) in a 4%
H2/Ar gas stream at 400 oC for 24
hours.11 These reduction conditions were the optimal
conditions to maximize iodine loading capacity on the
Ag0Z which were obtained from previous
studies.11, 13 Detailed physical properties of
Ag0Z were described previously9; the
same material was used herein. Various gases used in this study,
including compressed dry air (Ultra Zero Grade, dew point <
-70 oC), N2 (Ultra High Purity), and
4% H2/Ar (Certified Standard Grade, 4%
H2 balanced in Ar), were purchased from Airgas Inc.