Methods for recovering acidic gases

The method addresses oxidative degradation and wear in carbon dioxide adsorption devices by using a controlled cooling process with a low-oxygen cooling medium, enhancing the efficiency and stability of acidic gas recovery.

JP7884602B2Active Publication Date: 2026-07-03NGK CORP
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Patent Information

Application Number
JP2024544274
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2022-09-01
Filing Date
2023-08-29
Publication Date
2026-07-03
Estimated Expiration
2043-08-29

AI Technical Summary

Technical Problem

Existing carbon dioxide adsorption devices face issues with oxidative degradation and wear due to volatilization of the adsorbent material during the cooling process, which prolongs the cycle time and reduces adsorption efficiency.

Method used

A method involving an adsorption, desorption, and cooling process using a cooling medium with a lower oxygen concentration and controlled flow rate to minimize oxidative degradation and wear, with specific temperature and pressure conditions to optimize the recovery process.

Benefits of technology

The method effectively suppresses oxidative degradation and wear of the adsorbent, shortening the cycle time and improving the efficiency of acidic gas recovery by stabilizing the adsorbent performance.

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Patent Text Reader

Abstract

Provided is an acid gas collection method with which it is possible to reduce oxidation degradation and volatilization-caused abrasion of an acid gas adsorbing material. The acid gas collection method according to an embodiment of the present invention sequentially includes an absorbing step, a desorbing step, and a cooling step. In the absorbing step, a gas to be processed containing an acid gas is supplied to an acid gas absorbing device including an acid gas adsorbing material, and the acid gas is absorbed by the acid gas adsorbing material. In the desorbing step, the acid gas absorbing device is heated, and the acid gas is desorbed from the acid gas adsorbing material. In the cooling step, the acid gas absorbing device is cooled by a cooling medium with a temperature less than ambient temperature.
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Citation Information

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