| 摘要 |
<p>Process in conjunction with the production of oxygen ( 22 ), wherein incoming air ( 10, 16, 16 a , 16 b,) is brought to pass through a sorbent/zeolite structure ( 18 ), which comprises at least three zeolite units ( 50 a-f) intermittently operated in a first stage comprising adsorption of nitrogen from the air and a second stage comprising desorption ( 20, 20 a , 20 b) of thus adsorbed nitrogen. At least two of the zeolite units are operated in the adsorption stage, the incoming air being brought to pass consecutively ( 53 a) through the at least two zeolite units to form an increasing nitrogen gradient; and/or at least two units of the zeolite units are operated in the desorption stage, a pressure being released and/or a desorbing gas ( 22 a , 22 b) being brought to pass consecutively ( 53 b) through the at least two zeolite units to form a decreasing nitrogen gradient in the zeolite units.</p> |
