Combined isotherm of adsorption and absorption on coal and differentiation of both processes

Sorption of hydrogen and helium on coal and activated charcoal was measured at 298 K within the pressure range 0–1 bar and the obtained isotherms were characterized by a maximum deviation of the desorption branch from the adsorption branch implied with their shape the process of irreversible absorption. At the sorption of carbon dioxide on coal, the simultaneously running adsorption and absorption were registered by a combined isotherm AD/AB,...