A. Bagreev et Tj. Bandosz, Study of hydrogen sulfide adsorption on activated carbons using inverse gas chromatography at infinite dilution, J PHYS CH B, 104(37), 2000, pp. 8841-8847
Adsorption of hydrogen sulfide on fifteen samples of activated carbons (unm
odified and catalytic with introduced basic nitrogen groups) was studied us
ing inverse gas chromatography (IGC) at infinite dilution. Porous structure
of carbons was evaluated using sorption of nitrogen. From the retention vo
lume measured in IGC experiments, heats of adsorption, free energy of adsor
ption, entropy, and Henry's constants were calculated. The results showed t
he dependence of these quantities on pore sizes of the adsorbents. The stro
ng dependence of the isosteric heat of adsorption on the temperature of mea
surement and, following this, unusually high heat capacity suggest the stro
ng effect of specific interactions and catalytic influence of carbon surfac
e even unmodified. The calculated Henry's constants are in agreement with t
he Literature data. The adsorption on carbons with incorporated basic nitro
gen groups is characterized by stronger adsorbent-adsorbate interactions th
an on unmodified carbons.