Use of gas chromatography to study the adsorption at zero surface coverage of CH 3I on active carbons

Abstract

Four active carbons were prepared by carbonization of polyfurfuryl alcohol. From these, other four samples were prepared by impregnation with KI (1%). All these samples were characterized by adsorption of nitrogen and carbon dioxide at 77 K and 298 K, He density and mercury porosimetry. Gas-solid chromatography was used to study the adsorption of methyl iodide at zero surface coverge (Henry's law region). The thermodynamic functions of adsorption of methyl iodide at zero surface coverge ( ΔH A 0, ΔG A 0 and ΔS A 0) were obtained.