High capacity composite absorbent for capturing acid gases and applications

By using a high-capacity composite absorbent composed of triethylenediamine derivatives and functional additives, the selectivity and energy consumption problems of acid gas capture in existing technologies have been solved, achieving efficient acid gas capture and reducing equipment corrosion.

CN117180927BActive Publication Date: 2026-06-16BEIJING DWELL OIL & GAS TECH DEV CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING DWELL OIL & GAS TECH DEV CO LTD
Filing Date
2023-09-22
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

Existing sterically hindered amine absorbents are limited in source and have poor selectivity, failing to meet the needs of acid gas capture in industrial production, and also suffer from high energy consumption and equipment corrosion problems.

⚗Method used

A high-capacity composite absorbent composed of triethylenediamine derivatives, functional additives, and organic solvents, containing primary amine groups, with a ratio of 20–79%: 0.01–5 wt%: 20–75 wt%, and including defoamers, oxygen scavengers, and corrosion inhibitors, is used for the capture of acidic gases. The absorption temperature is 20–70℃, the pressure is 0.1–10 MPa, and the regeneration temperature is 90–130℃.

🎯Benefits of technology

It improves the absorption capacity of acidic gases, reduces energy consumption, reduces the amount of absorbent circulating, and reduces the equipment corrosion rate and the accumulation of stability salts.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a high-capacity composite absorbent for capturing acid gas and application, which comprises triethylenediamine derivatives, functional additives and an organic solvent, and the triethylenediamine derivatives contain primary amine groups; the application is used for removing acid gas in raw gas by directly using the high-capacity composite absorbent or diluting the high-capacity composite absorbent with water. The primary amine groups are introduced into the triethylenediamine, the advantages of steric amine and MDEA are considered, and the polyamine improves the absorption capacity of the absorbent.
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