EFFECT OF WATER-VAPOR ON ADSORPTION OF METHYL-IODIDE TO TRIETHYLENEDIAMINE-IMPREGNATED ACTIVATED CARBONS

The effect of humidity on the adsorption and desorption of methyl iodi de was investigated in a TEDA (triethylenediamine)-impregnated activat ed carbon bed. The amounts of chemisorption and physical adsorption of methyl iodide were measured in different humidity levels for base and TEDA-impregnated activated carbons. The physical adsorption of methyl iodide in the presence of water vapor was fitted with the potential t heory-based Dubinin-Raduahkevich equation. The significant amount of c hemisorption even in high humidity conditions confirmed the effectiven ess of TEDA-impregnation for trapping methyl iodide permanently.