Patent ID: 8728215

Claim:
An adsorption system for the separation of a more absorbable gas from a less absorbable gas in a gas mixture comprising: at least one adsorber vessel containing at least one adsorber bed for receiving the more absorbable gas and capable of undergoing the steps of pressurization and depressurization; at least one centrifugal machine in fluid flow communication with the adsorber vessel and designed to provide gas flow for the pressurization and the depressurization steps and which accelerates and decelerates in response to instructions; a controller for receiving data signals for the decreasing pressure ratio conditions across the centrifugal machine during deceleration and capable of sending instructions to the centrifugal machine and the flow control valves in response to the conditions; one or more flow control valves located at the suction inlet of the centrifugal machine and capable of adjustment upon receiving instructions to adjust; wherein the centrifugal machine is designed to pressurize the adsorber bed in which the more absorbable gas is adsorbed while removing the less absorbable gas from the adsorber vessel bed and/or depressurized the adsorber bed to remove the more absorbable gas from the adsorber bed; and further wherein the controller sends instructions to the one or more flow control valves which adjust in response to the instructions and adjusts the mass flow of the more absorbable gas during deceleration such that the deceleration rate of the centrifugal machine obtains its lowest operating speed near the point required to begin acceleration.