초록 ▼

A pressure or vacuum swing adsorption process and apparatus are used for the separation and recovery of certain gaseous components, such as carbon dioxide from hot gas mixtures containing water vapor. The process comprises introducing the feed gas mixture at an elevated temperature into a feed end o

A pressure or vacuum swing adsorption process and apparatus are used for the separation and recovery of certain gaseous components, such as carbon dioxide from hot gas mixtures containing water vapor. The process comprises introducing the feed gas mixture at an elevated temperature into a feed end of an adsorber column containing an adsorbent. The adsorbent preferentially adsorbs at least one adsorbable component. An adsorber effluent, depleted of the at least one adsorbable component, is withdrawn from a product end of the adsorber column. The adsorber column is depressurized below atmospheric pressure and then purged with steam to withdraw an effluent comprising a mixture of the at least one adsorbable component and H.sub.2 O. Next, the adsorber column is pressurized by introducing a gas that is depleted of the at least one adsorbable component. The steps are repeated in a cyclic manner.

대표청구항 ▼

[ What is claimed is:] [1.]1. A pressure swing adsorption process for the separation of a feed gas mixture containing at least one adsorbable component, comprising the steps of:(a) introducing at an elevated temperature and at an elevated pressure said feed gas mixture into a feed end of an adsorber

[ What is claimed is:] [1.]1. A pressure swing adsorption process for the separation of a feed gas mixture containing at least one adsorbable component, comprising the steps of:(a) introducing at an elevated temperature and at an elevated pressure said feed gas mixture into a feed end of an adsorber column containing an adsorbent which preferentially adsorbs said at least one adsorbable component at said elevated temperature and pressure, withdrawing from a product end of said adsorber column a first adsorber effluent depleted of said at least one adsorbable component;(b) depressurizing said adsorber column by withdrawing therefrom a depressurization gas enriched in said at least one adsorbable component;(c) purging said adsorber column at sub-atmospheric pressure by introducing into said adsorber column steam heated to a temperature at or near that of said feed gas mixture and withdrawing from said adsorber column a second adsorber effluent comprising a mixture of said at least one adsorbable component and H.sub.2 O;(d) pressurizing said adsorber column to approximately said elevated pressure by introducing into said adsorber column a repressurizing gas depleted of said at least one adsorbable component; and,(e) repeating steps (a) through (d) in a cyclic manner.