A method for capturing carbon dioxide in mixed gas with composite decarburization solution

A technology of mixed gas and carbon dioxide, which is applied in the field of composite decarburization solution to capture carbon dioxide in mixed gas, can solve the problems of high regeneration energy consumption and low decarburization capacity of decarburization solution, and achieve the effect of reducing consumption

Inactive Publication Date: 2011-12-21
DALIAN UNIV OF TECH
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Problems solved by technology

[0011] The invention provides a method for capturing carbon dioxide in a mixed gas with a composite decarburization solution, which solves the problems of low decarbonization capacity of the decarburization solution and high regeneration energy consumption, and has better CO2 under lower pressure conditions. 2 Recovery efficiency

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  • A method for capturing carbon dioxide in mixed gas with composite decarburization solution
  • A method for capturing carbon dioxide in mixed gas with composite decarburization solution

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Embodiment

[0020] 200g of which the total amine mass content is 40% MEA, the mixed solution of phenylethanol mass content as 60% is used as the absorption solution, and packed in a 500ml reactor equipped with a constant temperature oil bath stirrer, at a temperature of 40°C , to 0.012M 3 / h flow rate, the inlet pressure is 0.2MPa, the concentration is 99% CO 2 , Continuous measurement is carried out with a wet anti-corrosion flowmeter, from which the absorption rate, absorption capacity and absorption load of carbon dioxide are calculated. After the solution reaches saturation, set the temperature of the oil bath to 120°C for desorption, and measure its complete desorption amount and desorption rate. After three absorption and desorption tests, check its stability (see attached drawing).

[0021] From the examples, in the absence of water, the absorption of the solution decreases slightly, but the desorption rate is fast. When the saturated carbon dioxide absorption solution is desorbed...

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Abstract

The invention relates to a composite decarburization solution for capturing carbon dioxide in mixed gas, belonging to the technical field of carbon dioxide gas capture. It relates to a composite decarburization solution, which is composed of solvent benzyl alcohol, phenyl alcohol, N-methylpyrrolidone or a mixture thereof, main absorption component MEA, auxiliary absorption components EDA, DETA and TETA, active components PZ and 2, 3-butanedione, the corrosion inhibitor is sodium chromate, and the antioxidant is sodium metavanadate and copper carbonate. Since the composite decarburization liquid uses a mixed solvent, it not only improves the absorption capacity, purification degree and desorption rate of carbon dioxide, expands the reaction temperature range, but also reduces the volume of the desorption tower, greatly reduces regeneration energy consumption, and reduces equipment investment and operating costs. The invention is mainly used for capturing carbon dioxide in various chemical reaction tail gas, ore decomposition gas, combustion flue gas, natural gas, city gas and biogas, and has broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of gas separation and relates to a method for capturing carbon dioxide in mixed gas by using a composite decarburization solution. Background technique [0002] The greenhouse effect caused by carbon dioxide emissions has caused serious climate impacts on our planet. At present, most countries in the world, including my country, have signed the "Kyoto Protocol", indicating that the control of carbon dioxide emissions has become a matter of great concern to all countries in the world. At the same time, as a valuable carbon resource, carbon dioxide can be widely used in various fields such as machinery, chemical industry, food, medicine, etc. If it can be recycled effectively, it can reduce air pollution and continuously provide us with carbon resources . The source of carbon dioxide in our country is very rich, but due to unfavorable measures to recover carbon dioxide, the amount of carbon dioxide recovered...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14C01B31/20C01B32/50
Inventor 张永春郭超陈绍云宋微王晓峰李桂民
Owner DALIAN UNIV OF TECH
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