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Composite decarbonizing solution for gathering carbon dioxide in mixed gas

A carbon dioxide and mixed gas technology, applied in chemical instruments and methods, dispersed particle separation, separation methods, etc., can solve the problems of high regeneration energy consumption, low decarbonization capacity of decarbonization solution, etc., and achieve the effect of reducing consumption

Inactive Publication Date: 2009-12-30
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved in the present invention is to solve the problems of low decarburization capacity and high regeneration energy consumption of the decarburization solution by improving the formula of the composite decarburization solution, and can increase the CO2 under normal temperature and pressure conditions. 2 Recovery efficiency

Method used

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  • Composite decarbonizing solution for gathering carbon dioxide in mixed gas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 200g wherein the total amine mass content is 20% MEA, 10% water and NMP mixed solution is packed in the reactor that is equipped with constant temperature oil bath stirrer of 500ml as absorbent, at temperature is 40 degrees Celsius conditions, with 0.02436 m 3 / h flow rate into the CO with a pressure of 0.2MPa and a concentration of 98% 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, the oil bath temperature is set to 140 degrees Celsius for desorption, and its complete desorption amount and desorption rate are measured. The results are shown in the attached table (carbon dioxide absorption and desorption effect investigation table).

Embodiment 2

[0018] 200g of MEA in which the total amine mass content is 30%, 10% water and NMP mixed solution are packed into a 500ml reactor equipped with a constant temperature oil bath stirrer as an absorbent, the temperature is 40°C, and the temperature is 40°C, with 0.02436M 3 / h flow rate into the CO with a pressure of 0.2MPa and a concentration of 98% 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 140°C for desorption, and measure the complete desorption amount and desorption rate. The results are shown in the attached table.

Embodiment 3

[0020] 200g of which the total amine mass content is 40% MEA, 10% water and NMP mixed solution is packed into a 500ml reactor equipped with a constant temperature oil bath stirrer as an absorbent, the temperature is 40°C, and the temperature is 40°C, with 0.02436M 3 / h flow rate into the CO with a pressure of 0.2MPa and a concentration of 98% 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 140°C for desorption, and measure the complete desorption amount and desorption rate. The results are shown in the attached table.

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Abstract

The invention discloses a composite decarbonizing solution for gathering carbon dioxide in mixed gas, belonging to the technical field of gas separation. The composite decarbonizing solution is characterized by consisting of main absorption components including MEA and AEE, auxiliary absorption components including AHPD, AMP, TEA and MDEA, active components including PZ, HEPZ, AEP and DEA, sodium vanadate as an inhibiter, sodium sulfite and copper acetate as antioxidant, and a mixed solvent including NMP, polyethylene glycol and propylene carbonate and water. Because the mixed solvent is used for the composite decarbonizing liquid, on the one hand, the absorption capacity, the purification degree and the desorption rate are improved, and the reaction temperature range is enlarged, and on the other hand, regeneration energy consumption is greatly improved. The invention has the advantages that the composite decarbonizing solution is used for gathering carbon dioxide in various kinds of chemical reaction tail gas, burning stack gas and natural mixed gas and eliminating carbon oxide in city gas, natural gas, and the like, and has social benefit and economic benefit.

Description

technical field [0001] The invention belongs to the technical field of gas separation, and relates to a method for gas separation, in particular to a method for capturing a composite decarburization solution of carbon dioxide gas from mixed gas. Background technique [0002] The greenhouse effect caused by carbon dioxide emissions has already had a severe climate impact 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 is widely used in chemical industry, food, medicine and other fields. If it can be effectively developed and utilized, it can 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 annual recycled carbo...

Claims

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Application Information

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IPC IPC(8): B01D53/14C01B31/20
Inventor 张永春宋微陈绍云
Owner DALIAN UNIV OF TECH
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