Organic amine solvent for capturing carbon dioxide

An organic amine and antioxidant technology, which is applied in the field of gas separation to achieve the effects of reducing energy consumption for regeneration and operation, good social and economic benefits, and low energy consumption for regeneration

Inactive Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to improve the decarburization solution formula and process equipment to realize the current decarburization solution re

Method used

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  • Organic amine solvent for capturing carbon dioxide

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Effect test

Embodiment 1

[0025] A novel process for flue gas capture of CO 2 Device, handling flue gas volume (dry basis) 550600Nm 3 / h, carbon dioxide content 14.45%, flue gas temperature 45 ℃, in the amine solution, the total concentration of organic amine is 20% by weight, wherein, the content of polyetheramine is 8% by weight, and the content of hydroxyethylmorpholine is 4 % by weight, the activator is 2-amino-2-methyl-1- the concentration is 7% by weight, the weight of diethylaminoethanol is 1%, the content of the corrosion inhibitor sodium metavanadate is 0.1% by weight, the antioxidant is hydroxyethylidene di Phosphonic acid weight 0.1%, the rest is water, the flow rate of amine solution is 3200Nm 3 / h. Use 144℃, 0.3MPa low-pressure steam for thermal regeneration.

[0026] After decarbonization treatment, the carbon dioxide capture rate is 82%, the unit energy consumption of carbon dioxide capture is 1.27 tons of steam / ton of carbon dioxide, and the consumption of amine solvent is 0...

Embodiment 2

[0031] Take 200g of organic amine solution, including: sodium glycinate 16g, polyetheramine 24g, 2-amino-2-methyl-1-propanol 15g, morpholine 5g, deionized water as solvent, sodium sulfite 0.1g, potassium sodium tartrate 0.1 g, 0.1g of sodium antimony tartrate, put it into a 500ml autoclave, and then quickly fill it with 0.6Mpa CO 2 , and stirred to make it completely absorbed by the solution, then filled with 0.8MPa O 2 , heated to a reaction temperature of 120 o C, start stirring, rotating speed 400rad / min. When the oxygen pressure begins to drop, it indicates that the amine liquid begins to undergo oxidative degradation, and this time is recorded as the initial degradation time. The results are shown in Table 1:

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Abstract

The invention provides an organic amine solution for capturing low partial pressure carbon dioxide and belongs to the field of a gas isolation technology. The solvent comprises 10-40% of a main absorption component, 5-20% of an auxiliary absorption component, 0.05-1.0% of a corrosion inhibitor, 0.05-1.0% of an antioxidant and 30-90% of a mixed solvent. The main absorption component is one or more components selected from glycinate, polyetheramine, morpholine and its derivative and polyethylene glycol dimetyl ether. The auxiliary absorption component is one or more components selected from diethylaminoethanol, 2-amino-2-methyl-1-propyl alcohol, N-methyldiethanolamine and hydroxyethyl ethylenediamine. The solution provided by the invention has characteristics of little operation loss, high resistance to oxidation, low energy consumption for regeneration and the like. The solvent is mainly used for capturing carbon dioxide in various gas sources, such as fossil fuel tail gas, chemical reaction tail gas, natural gas and the like. The solvent has good social benefit and economic benefit.

Description

technical field [0001] The invention belongs to the field of gas separation, and relates to a method for capturing gas, in particular to a method for capturing and recovering carbon dioxide from mixed gas. Background technique [0002] Carbon dioxide is a major greenhouse gas, and its massive emission has brought huge environmental and climate problems to the whole world. As a large fossil energy consumer, my country has great potential for reducing carbon dioxide emissions; on the other hand, carbon dioxide is also an extremely useful basic resource, widely used in fine chemicals, tertiary oil recovery, food, medicine and other industries. Based on the above two points, capturing carbon dioxide and applying it to related fields can not only effectively alleviate climate problems, but also create better economic value. [0003] At present, the capture and recovery of carbon dioxide by the organic amine method is one of the most important and successful methods used in indu...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/62
CPCY02A50/20Y02C20/40
Inventor 毛松柏汪东黄钟斌
Owner CHINA PETROLEUM & CHEM CORP
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