| 摘要 |
A method and apparatus for the separation of air by pressure swing adsorption utilizing two beds of adsorbent material which are operated out of phase, thereby providing a more or less continuous flow of product oxygen with reduced argon content. A first adsorbent bed comprises a carbon molecular sieve which adsorbs oxygen more rapidly then nitrogen. The adsorbed oxygen is desorbed from the first bed and flows to a second bed, comprising a zeolite molecular sieve that adsorbs nitrogen preferentially to oxygen, thereby producing product oxygen as the non-adsorbed gas. Alternatively, the second bed comprises a carbon molecular sieve, and the adsorbed oxygen is desorbed as the oxygen product gas. |
