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Composite absorbent used for smoke decarbonization

An absorbent and flue gas technology, applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve the problems of difficult to regenerate thermally stable salts, oxidative degradation of absorbents, equipment corrosion, etc., and achieve high absorption load and absorption. The effect of fast speed and slowing down equipment corrosion

Inactive Publication Date: 2012-10-24
CHONGQING UNIV
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Problems solved by technology

[0007] Oxygen or other impurities in the raw material gas and solution react with the decarburization solution to generate a series of heat-stable salts that are difficult to regenerate, which will cause oxidative degradation of the absorbent and cause equipment corrosion and other related problems

Method used

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Embodiment Construction

[0016] The flue gas decarbonization composite absorbent of the present invention is composed of an absorption body, an activator, an antioxidant and water, wherein the absorption body is ethanolamine MEA or N-methyldiethanolamine MDEA, and its mass percentage is 15% to 30%; The activator component is diethylenetriamine DETA, and its mass percentage is 4%-10%, which can effectively improve the absorption liquid to CO 2 The absorption load and absorption rate; the antioxidant is sodium metavanadate, and its mass percentage is 0.05%-1%, which can effectively reduce the oxidative degradation of the absorbent and slow down the equipment corrosion caused by the oxidative degradation of the absorbent; The amount is water. The mass percent content of the total amines in the present invention (that is, the total mass percent content of the absorption body and the activator) is 25%-35%.

[0017] The present invention is suitable for CO 2 Decarbonization of flue gas with a concentratio...

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Abstract

The invention discloses a composite absorbent used for smoke decarbonization and composed of the following components by mass: 15%-30% of absorption main body, 4%-10% of activating agent and 0.05%-1% of antioxidant and water as the balance. The absorption main body is ethanolamine MEA or N-methyl-diethanolamine MDEA, the activating agent is diethylenetriamine (DETA), and the antioxidant is sodium metavanadate. The absorbent is high in absorption load, high in absorption rate, good in regenerability, low in corrosivity and capable of effectively reducing device corrosion and the like, saves cost and reduces energy consumption. The absorbent is suitable for smoke decarbonization with CO2 density as 1%-40%, and is wide in CO2 density adaptation face.

Description

technical field [0001] The invention relates to the improvement of carbon dioxide removal technology in flue gas, in particular to a composite absorbent for flue gas decarbonization, which belongs to the technical field of gas separation. [0002] Background technique [0003] With the rapid development of industry, the consumption of fossil fuels has increased sharply, resulting in atmospheric CO 2 The concentration surged. Greenhouse gas CO 2 The amount of emissions is increasing at a huge and rapid rate. If appropriate measures are not actively taken, it will definitely bring immeasurable disasters to the global climate. Scholars at home and abroad have conducted a large number of studies on CO in flue gas after combustion. 2 The technical research on capture, among which the research and application of organic amine chemical absorption technology is the most extensive and mature, it uses alkaline aqueous solution with hydroxyl and amine groups as absorbent, and uses ...

Claims

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Application Information

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IPC IPC(8): B01D53/14
Inventor 刘清才文娟吴国防保思敏丁健刘浪兰苑培杨剑孔明牛德良
Owner CHONGQING UNIV
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