Xenon adsorption on graphitized carbon blacks over a wide coverage range

Abstract

Xenon adsorption isotherms are reported for two graphitized carbon blacks, Sterling MT 3100 and Graphon, at surface coverages ranging from 10 −10 to 0.9. A radioactive tracer method based on Xe 133 and a conventional volumetric method were used at the lower and higher coverages, respectively. Results confirm the small degree of surface heterogeneity associated with both materials. Close obeyance of Henry's law over the surface coverage range 10 −10 to 10 −6 was observed for Sterling MT 3100. At higher surface coverages, the adsorbed phase on both carbon blacks is interpreted to be a two-dimensionally mobile layer with adsorbate-adsorbate interactions.