Patent ID: 6562105
Filing Date: 2003-05-13
Classification: B01D,C01B,F01K,Y02P

Abstract:
A combined method of separating oxygen from an oxygen containing gas and generating power, said method comprising:separating oxygen from the oxygen containing gas into permeated oxygen and an oxygen depleted retentate stream in an oxygen transport membrane unit including at least one oxygen transport membrane operating at an elevated operational temperature and having a cathode side and an anode side; purging the anode side of the at least one oxygen transport membrane with a pressurized purge stream comprising pressurized, superheated steam; discharging a pressurized oxygen product stream from said anode side of said at least one oxygen transport membrane, said pressurized oxygen product stream comprising said permeated oxygen and said steam; condensing at least part of the steam in said pressurized oxygen product stream by transferring heat to a process fluid that boils at a boiling temperature lower than the condensing temperature of the steam contained in the pressurized oxygen product stream so that the process fluid boils and the at least a portion of the steam within the pressurized oxygen product stream condenses; separating condensed water from said pressurized oxygen product stream; and extracting energy from the process fluid as shaft work.