ADSORPTION METHOD AT VARIABLE TEMPERATURE Russian patent published in 2020 - IPC B01D53/04 

FIELD: chemical or physical processes.

SUBSTANCE: present group of inventions relates to a method of separating a given component from a gas mixture, also containing one or more secondary components, for example, separation of carbon dioxide from furnace gas, also containing nitrogen. In particular, the present invention relates to a process which uses adsorption at a variable temperature of a given component on a solid adsorbent. Described is a variable-temperature adsorption method (VTA) for extracting a given component from gas mixture (111), carried out in several reactors (101, 102, 103). Each reactor (101) performs the following stages. Adsorption stage (a), at which inlet flow (111) of gas mixture is brought into contact with solid adsorbent, having selectivity with respect to a given component, to obtain first spent stream (112) depleted of a predetermined component. Heating step (b) for regenerating the saturated adsorbent to obtain a first output stream (115) containing the predetermined component; cooling regenerated adsorbent step (c). VTA process also includes: i) upstream of cooling stage (c), pre-cooling stage (b1), where regenerated adsorbent is brought into contact with waste stream (137), obtained at adsorption step (a) in one reactor (103), to form second outlet stream (116) of the predetermined component. After adsorption step (a) and before heating stage (b), preheating step (a1), on which saturated adsorbent is brought into contact with flushing stream (126) obtained in another reactor (102) at preliminary cooling stage. Also disclosed is an apparatus for treating a gas mixture and extracting a predetermined component from said gas mixture using the disclosed method.

EFFECT: group of inventions enables to create a process capable of providing high purity and high efficiency of extracting a given component, low power consumption, high efficiency and low capital costs.

18 cl, 12 dwg, 1 tbl