Adsorption of Methyl Disulfide on Porous Adsorbents (Activated Carbon, Zeolite and Silicate)

Abstract

The static adsorption of methyl disulfide on twenty kinds of adsorbents was investigated by a gravimetric method in order to obtain some fundamental information on deodorization of methyl disulfide gas. The adsorption of activated carbon No. 4 with the highest adsorptive capacity was expressed by Dubinin-Astakhov's equation (n=2). It may be concluded that the amount of methyl disulfide adsorbed and the rate of adsorption depend mainly on micropore volume (r<15Å) rather than on other properties such as pH, pKa, basic amount, and surface area. Regarding good application of Dubinin-Astakhov's equation to adsorption isotherm on activated carbon No. 4, its heat of adsorption (14∼21kcal/mol), and its amount chemisorbed (4∼5%), it seemed likely that methyl disulfide was held by physical adsorption in its micropores.