Improvements in cyclical swing adsorption processes

摘要

The concentration of adsorbate in the feed gas (1) to an on-stream bed (13) of a cyclical swing adsorption process is monitored (35) and the data processed (33) to predict the time required to complete the on-stream mode of that bed and the purge (27) flow rate and/or other regeneration mode operating condition (28) of the concurrently off-stream bed (14) is modified in response to changes in said predicted time whereby the regeneration mode of the off-steam bed is completed at the same time as the on-stream mode of the concurrent on-stream bed.