Kombinierte kryogenische und nichtkryogenische Zerlegung eines Gasgemisches

摘要

Gas mixtures (2) are separated by cryogenic separation (3), preferably a cryogenic condensation separation cycle, into at least a first gas mixture (4) and a second gas mixture (5) having at least one component common with the first gas mixture (4); at least one gas mixture selected from at least a portion of said feed gas mixture (31) and at least a portion (6) of said second gas mixture (5) is subjected to non-cryogenic separation (7; 30) to provide a separated gas (9; 33) rich in said common component; and said separated gas (9; 33) is added to said first gas mixture (4) to contribute to a product gas mixture (13). It is particularly preferred to also blend a portion (11) of the second gas mixture (5) with the first gas mixture (4) to facilitate, in conjunction with the separated stream (9; 33), simultaneous control of both the amount and composition of the first gas mixture product (13). The process has particular application to the separation of a gas containing primarily hydrogen and carbon monoxide to provide a product gas which consists primarily of hydrogen and carbon monoxide in a molar ratio different from that of the feed gas.