In this study, the theoretical prediction and experimental results obtained by the stimulation of sorption processes of gas-adsorbent systems exposed to dielectric barrier discharge (DBD) are presented. It is experimentally determined that critical pressures for CO2-silicagel and SF6-silicagel systems exist. The values of these critical pressures for investigated systems are obtained as 15 and 170 Torr, respectively. The existence of a critical pressure for adsorption stimulated by DBD indicates that there are two opposite processes: one is additional adsorption, and the other is desorption. The degree of dominance of these phenomena is different under various conditions, and it specifies the adsorption mechanism that is stimulated by DBD.