| 摘要 |
A METHOD IS DISCLOSED FOR SEPARATING A MULTICOMPONENT GAS MIXTURE COMPRISING AT LEAST THREE COMPONENTS INTO THREE PRODUCT STREAMS BY MEANS OF ADSORBENT MEMBRANE ZONES (3,11) OPERATING IN SERIES. EACH PRODUCT IS ENRICHED IN A DIFFERENT COMPONENT ON THE ADSORBENT MATERIAL. A NON-PREMEATE PRIMARY COMPONENT PRODUCT IS OBTAINED BY THE SELECTIVE ADSORPTION AND PERMEATION THROUGH THE ADSORBENT MEMBRANES (5,13) OF SECONDARY COMPONENTS WHICH ARE MORE STRONGLY ADSORBED THAN THE PRIMARY COMPONENTS IN THE GAS MIXTURE. TWO OR MORE PERMEATE STREAMS (7,15) ENRICHED IN MORE THE STRONGLY ADSORBED COMPONENTS ARE WITHDRAWN FROM THE MEMBRANE ZONES (3,11) AS INDIVIDUAL SECONDARY PRODUCTS, EACH OF WHICH CONTAINS A DIFFERENT COMPONENTDISTRIBUTION DETERMINED BY THE RELATIVE STRENGTH OF ADSORPTION OF THE SECONDARY COMPONENTS OF THE ADSORBENT MATERIAL. INCREASED RECOVERY AND PRODUCT PURITY ARE REALIZED BY THE INTEGRATION OF PRESSURE SWING ADSORPTION (PSA) AND CRYOGENIC SEPARATION SYSTEM WITH THE ADSORBENT MEMBRANE ZONES (3,11). PSA REJECT GAS (27) IS USED AS A MEMBRANE SWEEP GAS TO INCREASE THE PERMEATION RATES OF SECONDARY COMPONENTS. (FIG 1)
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