Adsorbent regeneration using liquid hot water stream

The method of using a heated liquid water stream to desorb acid gases from hydrophobic adsorbents addresses the inefficiencies of current CCUS technologies by leveraging waste heat and renewable energy, achieving cost-effective and energy-efficient adsorbent regeneration.

WO2026115292A1PCT designated stage Publication Date: 2026-06-04TOTALENERGIES ONETECH +1
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
TOTALENERGIES ONETECH
Filing Date
2024-11-28
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

Current CCUS technologies face challenges in efficiently utilizing low-grade heat sources for regenerating CO2-loaded adsorbents, often requiring complex and expensive systems like high vacuum and liquid ring compressors, leading to high energy consumption and operational costs.

Method used

A method using a heated liquid water stream at temperatures below its boiling point to desorb acid gases from hydrophobic adsorbents, leveraging waste heat or renewable energy, with a system design that recycles and reheats the water for repeated use, and employs a hydrophobic adsorbent material like zeolites or MOFs.

Benefits of technology

This approach reduces energy requirements and operational costs while effectively regenerating adsorbents, utilizing waste heat efficiently and enhancing the adaptability to various operational contexts.

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Abstract

This invention relates to a method for capturing and regenerating acid gases, such as CO₂, from gas streams using a hydrophobic adsorbent material. The method involves regenerating the acid gas-enriched adsorbent material by 5 contacting it with heated liquid water, preferably using renewable or waste heat sources. The hydrophobic adsorbent, which may be modified for enhanced water resistance, includes materials such as zeolites and metal-organic frameworks.
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