CO2 Absorbents for Post Combustion Capture

A carbon dioxide and absorbent technology, applied in chemical instruments and methods, dispersed particle separation, air quality improvement, etc., to achieve the effects of reducing solution loss, fast absorption rate, and reducing energy consumption for regeneration
CN104645782BActive Publication Date: 2017-05-31SHANGHAI BOILER WORKS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI BOILER WORKS
Publication Date
2017-05-31

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Abstract

The invention relates to a carbon dioxide absorbent used for capturing after combustion. The carbon dioxide absorbent is characterized by being composed of a main absorbent polyethyleneimine (PEI), auxiliary absorbents TEPA, MEA, MDEA, DEA and PZ, an antioxidant sodium sulfite, potassium sulfite or ammonium sulfite, a corrosion inhibitor sodium molybdate, sodium chromate, sodium vanadate or ammonium molybdate, and water. The molecular weight of polyethyleneimine (PEI) is 300-500; polyethyleneimine has a branch shape, and the molecule comprises three amino groups including primary amine, secondary amine and tertiary amine; and compared with other types of organic amines, polyethyleneimine has higher amine density. A compound absorption solution has relatively high carbon dioxide absorption amount, relatively rapid absorption speed, low regeneration energy consumption and high stability, so that the absorbent has a very great application prospect in the aspect of capturing carbon dioxide after combustion.
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Description

technical field

[0001] The invention belongs to the technical field of gas separation and chemical materials, and in particular relates to a composite organic amine solution suitable for capturing carbon dioxide after combustion. Background technique

[0002] In recent years, the "greenhouse effect" caused by massive carbon dioxide emissions has aroused widespread concern, and it is imminent to reduce carbon dioxide emissions. At present, fossil fuels are still the most important energy source for human beings, and until other alternative energy sources are found, the combustion of fossil fuels is still the most important source of carbon dioxide emissions for human beings. Carbon dioxide capture is considered to be the most effective way to reduce carbon dioxide emissions, among which post-combustion capture is the most mature capture method. Carbon dioxide absorbent is the core of the whole capture process and plays a key role in improving efficiency and reducing costs. ...

Claims

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