Energy of vented gases as a means for improving product purity during swing adsorption

The equilibrium swing adsorption model is used to show that the purity of the product gas linearly increases with decreasing the ratio of the gas pressure during the recovery stage to the gas pressure during the adsorption step. We propose to use the energy of the vented gas for decreasing this ratio through ejecting the vented gas flow. A fundamentally new swing adsorption flowsheet with a gas ejector is proposed.