Electrochemical regeneration of high purity co2 and basic sorbent from carbonates and / or bicarbonates for efficient carbon capture

The modular porous solid electrolyte reactor system addresses the energy and cost inefficiencies of current carbon capture technologies by electrochemically regenerating high purity CO2 and basic sorbent from carbonates and bicarbonates, achieving efficient and cost-effective carbon capture.

WO2025064523A1 Publication Date: 2025-03-27WIILIAM MARSH RICE UNIVERSITY
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Patent Information

Application Number
PCT/US2024/047244
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-09-19
Filing Date
2024-09-18
Publication Date
2025-03-27

AI Technical Summary

Technical Problem

Current carbon capture technologies, particularly those using amine scrubbing and basic aqueous solutions, face challenges in energy efficiency and cost due to the energy-intensive thermal regeneration process, and existing electrochemical methods suffer from low regeneration rates, complex acid/alkaline separation, and side product generation.

Method used

A modular porous solid electrolyte reactor system that uses a proton exchange membrane and a cation exchange membrane to electrochemically regenerate high purity CO2 and basic sorbent from carbonates and/or bicarbonates, achieving efficient CO2 release and sorbent regeneration under room temperature and ambient pressure.

Benefits of technology

The system achieves high purity CO2 regeneration (>99%) at practical rates and efficiently regenerates the basic sorbent, reducing energy consumption and operational costs compared to traditional thermal regeneration methods.

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Abstract

Systems for electrochemical carbon dioxide and basic sorbent regeneration comprising a modular porous solid electrolyte reactor and corresponding method and process for electrochemical carbon dioxide and basic sorbent regeneration. The modular porous solid electrolyte reactor comprises an anode chamber, a cathode chamber, and a membrane system. The membrane system comprises a proton exchange membrane, a cation exchange membrane, and a porous solid electrolyte layer located between the proton exchange membrane and the cation exchange membrane. The membrane system is configured to receive a feed stream comprising a basic sorbent and sorbed carbon dioxide in the form of carbonates and / or bicarbonates and produce a high purity stream comprising carbon dioxide. The anode chamber is configured to receive a hydrogen source and produce protons at the anode so as to provide protons to the membrane system. The cathode chamber is configured to receive a water source, receive cations from the membrane system, and produce a regenerated basic sorbent stream.
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