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.