Figure 6. 113 ppbv
CH3I on Ag0-Aerogel, SCM prediction
using nth order SCM and 1st order
SCM with average ks .
With the developed nth order SCM, the adsorption
behavior can be predicted more accurately. Figure 7 shows the predicted
behavior of 113, 266, 1130 and 10400 ppbv CH3I
adsorption on Ag0-Aerogel at 150 ℃ using
nth order SCM. The capacity loss caused by dry air
aging effect was not considered, which means qe =
37 wt% or 2.9×10-3 mol/g, and other parameters arekf = 5.99 cm/s, Dp =
4.59×10-4 cm2/s, n = 1.37 andks* = 1287
(cm/s)∙(mol/cm3)1-n. Based on the
results, for CH3I adsorption on
Ag0-Aerogel at 150 ℃ reaching equilibrium, 19K days
are required at 113 ppbv condition, 7.6K days at 266 ppbv, 1.6K days at
1130 ppbv and 170 days at 10400 ppbv.