methods to maximize the time that an adsorbent bed can remain 'online' in the feed mode a variation adsorption process without experiencing the adsorvate advance, and to improve the efficiency of the pre-purifier cycle time in a process tsa, psa or tsa / psa hybrid for removing co2 from a feed gas mixture, air separation process, and tsa or tsa / psa hybrid process cycle for air purification.

摘要

the present invention relates to a method of controlling the pre-purifier cycle time by monitoring the environmental co2 content in order to avoid the occurrence of co2 advancement caused by extreme instantaneous variations in the environmental co2 content. instead of operating only by the pre-purifier design bed capacity, the method of the invention continuously updates the bed capacity for contaminants using the temperature, pressure and composition of feed contaminants, by calculating the total amount of contaminants that were fed to the pre-purifier during the feeding stage and estimation of the speed of the disturbance front, that is, the speed at which the front of contaminants from extreme instantaneous variations in the environmental content is going to propagate within the bed of adsorbents. estimating the speed of the disturbance front allows a more accurate estimate of the maximum time remaining for the feeding step before the start of the co2 advance experiment. this eliminates the need to unnecessarily change the "online" bed earlier and the risk of shorter regeneration for the "offline" bed.