Regeneration of gas adsorbents

摘要

Two or more acidic gaseous species such as hydrogen sulphide and carbon dioxide from an adsorbent can be selectively removed from a feed gas by contacting the feed gas with an adsorbent for these acidic species, followed by: a. subjecting the adsorbent to a first purging gas, said first purging gas not containing said first acidic gaseous species and containing said second acidic gaseous species at a partial pressure which is at least the partial pressure of said second gaseous species in said feed gas; b. subsequently subjecting the adsorbent to a second purging gas, said second purging gas not containing said first gaseous species and, containing this second gaseous species at a partial pressure which is lower than the partial pressure of said second gaseous species in said feed gas.

主权项

1. A process for selectively removing a first and second acidic gaseous species from an adsorbent which has been contacted with a feed gas comprising at least the first and second gaseous species, the process comprising:
(a) subjecting the adsorbent to a first purging gas, the first purging gas not comprising the first acidic gaseous species and comprising the second acidic gaseous species at a partial pressure which is at least the partial pressure of the second gaseous species in the feed gas; (b) subsequently subjecting the adsorbent to a second purging gas, the second purging gas not comprising the first gaseous species and, if comprising the second gaseous species, comprising the second gaseous species at a partial pressure which is lower than the partial pressure of the second gaseous species in the feed gas.