Simulation study of hysteresis of argon adsorption in a conical pore and a constricted cylindrical pore

► The hysteresis loop of a conical pore depends significantly on the pore angle. ► The hysteresis loop of an open-ended conical pore follows type C of de Boer classification. ► For conical pores with a closed wider end, either cavitation or pore blocking can operate in evaporation. ► The condensation and evaporation of a periodical constricted pore are governed by those of the individual sections.