Method and apparatus for capturing CO2 by partial condensation and / or distillation and / or washing and / or solidification

FR3158245A1Pending Publication Date: 2025-07-18LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
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Patent Information

Application Number
FR2024000292
Authority / Receiving Office
FR · FR
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-01-12
Publication Date
2025-07-18

AI Technical Summary

Technical Problem

Existing CO2 capture methods in hydrogen production units face inefficiencies due to high energy consumption and suboptimal pressure levels in partial condensation and pressure swing adsorption processes, leading to degraded performance and wasted energy.

Method used

Implementing a turbine downstream of cryogenic separation to expand residual gases and utilize their pressure energy, coupled with pressure swing adsorption to optimize CO2 capture, and using turbines to generate cold for subsequent separation steps.

Benefits of technology

Enhances CO2 capture efficiency by optimizing energy use and generating cold for separation processes, reducing energy consumption and improving CO2 yield.

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Abstract

Title of the invention: Method and apparatus for capturing CO2 by partial condensation and / or distillation and / or washing and / or solidification An apparatus for separating a gas mixture containing CO2 and at least one component lighter than CO2 comprises a separation unit (CC) for separating by partial condensation and / or distillation at a temperature below 0°C the gas mixture (MG), generating a fluid (P) enriched in CO2 and a first waste gas (PGR) depleted in CO2 which is substantially at the same pressure as the gas mixture and an apparatus for separating by pressure swing adsorption (CO2 PSA) the first waste gas producing a first gas enriched in CO2 (GE) at a first pressure and a second waste gas (DGR) depleted in CO2 at a second pressure higher than the first pressure,a turbine (T1) and a pipeline for sending the first residual gas (PGR) to expand in the turbine (T1) downstream of the separation unit (CC) and upstream of the pressure swing adsorption separation device (PSA CO2). Fig. 1,
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Citation Information

Patent Citations

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    DE4210638A1

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  • Installation for production of gas enriched in carbon dioxide and gas reduced in carbon dioxide comprises pressure swing adsorption unit, turbine, compressor and an outlet unit to send gas reduced in carbon dioxide to turbine

    FR2890575A1

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