Abstract
Adsorption of methanethiol on activated carbon, magnesium silicate, and zeolite, and the rate of adsorption on them were gravimetrically measured to elucidate the mechanism of this adsorption. The Dubinin-Astakhov equation was applicable to the adsorption isotherms of methanethiol on these adsorbents. The rate of adsorption was expressed by the fractional approach to the equilibrium, and the mechanism of the rate of adsorption was explained by the volume filling of the smallest pore to the pores of a certain dimension. Activated carbon No. 2 was suitable for practical purposes because it had a high adsorption capacity at high pressure, its rate of adsorption was relatively fast, and methanethiol was physically adsorbed on it. From the results of differential heat of adsorption, adsorption of methanethiol on activated carbon No. 2 was considered to be the volume filling of micropores and the adsorption of monolayers or multilayers on transitional pores.
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