Method for capturing carbon dioxide
By using perfluorinated solvents to absorb carbon dioxide through contact with the feed gas under high pressure, and combining this with diversion, desorption, and depressurization regeneration technologies, the problems of low purity and high loss when capturing carbon dioxide with perfluorinated solvents are solved. This achieves the separation of high-purity carbon dioxide and reduces energy consumption, making it suitable for industrial carbon dioxide capture.
CN115646135BActive Publication Date: 2026-06-16JINAN NOAH EMERGENCY EQUIP CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JINAN NOAH EMERGENCY EQUIP CO LTD
- Filing Date
- 2022-07-15
- Publication Date
- 2026-06-16
AI Technical Summary
⚠Technical Problem
In existing technologies, the capture of carbon dioxide using perfluorinated solvents suffers from problems such as low carbon dioxide purity and high losses.
⚗Method used
The process involves using a perfluorinated solvent to absorb the feed gas under high pressure. Through diversion and desorption operations, the absorption capacity of carbon dioxide and nitrogen is utilized, combined with pressure reduction regeneration, the addition of silicone oil, and a secondary condenser to gradually separate and recover high-purity carbon dioxide.
🎯Benefits of technology
It achieves the capture of high-purity carbon dioxide, reduces regeneration energy consumption and perfluorinated solvent loss, and is suitable for industrial application.
✦ Generated by Eureka AI based on patent content.
Abstract
The present application relates to the technical field of carbon dioxide capture, and discloses a carbon dioxide capture method, which comprises the following steps: (1) contacting raw gas with a perfluorinated solvent under a pressure of 2-7 MPa to perform absorption, so as to obtain purified gas G i and absorption liquid X containing carbon dioxide and nitrogen i ; optionally, the absorption liquid X i is at least divided into A i and B i parts, wherein the A i part is returned to step (1) to be added into the raw gas; the absorption liquid X i or the B i part is subjected to desorption, so as to obtain regenerated perfluorinated solvent Z i and desorption gas J containing carbon dioxide and nitrogen i ; (2) judging the carbon dioxide concentration in the desorption gas J i , when the carbon dioxide concentration in the desorption gas J i is less than 90 wt%, the desorption gas J i is used as the raw gas, and the step (1) is repeated. The method in the present application uses the perfluorinated solvent as the carbon dioxide absorbent, and can reduce the energy consumption of regeneration by pressure reduction, and is suitable for industrial popularization.
Need to check novelty before this filing date? Find Prior Art