Regeneration of a drier at two different partial pressure levels

A two-stage regeneration process using different partial pressures for CO2 desorption addresses the issue of temperature drops in adsorbent drying, preventing damage and reducing costs by stabilizing temperatures and improving efficiency.

WO2026119440A1 Publication Date: 2026-06-11LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
Filing Date
2025-09-23
Publication Date
2026-06-11

AI Technical Summary

⚠Technical Problem

Drying gas mixtures by adsorption can lead to co-adsorption of components like CO2, causing temperature drops that freeze moisture in adsorbent pores, damaging the adsorbent and increasing energy and investment costs due to maintaining higher dryer operation temperatures.

⚗Method used

A two-stage regeneration process using different partial pressures for CO2 desorption, with a first stream at a higher partial pressure and a second stream at a lower partial pressure, controlling CO2 desorption and temperature fluctuations.

🎯Benefits of technology

This method prevents adsorbent damage by freezing and reduces energy consumption and investment costs by stabilizing temperatures during regeneration, enhancing the adsorption process efficiency.

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Abstract

Process for treating a gas mixture, comprising drying said gas mixture by adsorption according to an adsorption cycle involving at least one adsorber (6) loaded with adsorbent, said gas mixture comprising moisture as well as a component A, wherein the adsorption cycle comprises : - an adsorption phase during which moisture is adsorbed and component A is co-adsorbed as well, - a regeneration phase comprising a step of regenerating the adsorbent by desorbing moisture as well as component A with a first regeneration stream (E1) comprising component A, at a component A first partial pressure in the adsorber (6), followed by a step of regenerating the adsorbent with a second regeneration stream (E2), at a component A second partial pressure in the adsorber (6) below said first partial pressure, thereby desorbing remaining moisture.
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