Absorbent liquid for capturing carbon dioxide, application thereof, and method for capturing carbon dioxide
By using a phase capture method containing absorbents such as 3-amino-1-propanol and polyether additives, the high energy consumption and high viscosity problems in traditional carbon dioxide capture processes are solved, low-temperature regeneration and efficient carbon dioxide absorption are achieved, and the capture cost is reduced.
Patent Information
- Application Number
- CN202310649622.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-02
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2043-06-02
AI Technical Summary
In the existing traditional process of capturing carbon dioxide by chemical absorption, the solvent regeneration energy consumption is high, the regeneration temperature needs to reach the boiling point of the solvent, the absorption liquid has high viscosity, is easy to foam, and the carbon dioxide absorption amount is small, resulting in high capture costs.
A method of capturing carbon dioxide by phase separation is adopted, which includes an absorbent containing 3-amino-1-propanol, diglycolamine, monoethanolamine, etc., and polyether additives are added. The viscosity is reduced by using an activator and a non-aqueous solvent to achieve phase separation absorption and low-temperature regeneration of carbon dioxide.
The energy consumption cost of the carbon dioxide capture process is reduced, the carbon dioxide absorption capacity is increased, the high viscosity and foaming problems are avoided, the dynamic balance of the non-aqueous system is maintained, and the water vapor generated by distillation is used as the reboiler heat source to further save energy.