Patent ID: 6277174
Filing Date: 2001-08-21
Classification: B01D

Abstract:
A pressure swing adsorption (PSA) method for removing a preferred gas from a gas mixture, said method performed by at least a first adsorbent bed and a second adsorbent bed operating over plural cycles, each cycle comprising plural steps wherein each bed proceeds through both adsorption and desorption actions, said method comprising the steps of:a) monitoring, in a cycle, a maximum feed pressure to each said bed of said gas mixture during adsorption therein;b) monitoring, in a cycle, a minimum evacuation pressure from each said bed of said gas mixture during desorption therefrom; andc) altering individual step times within a cycle, in accord with pressures monitored in steps a) and b), to control flows to and between said first adsorbent bed and second adsorbent bed in order to optimize and achieve maximum production.