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A kind of aminohydrocarbyl silane series decarburization solvent and decarburization method

An aminohydrocarbyl silane and decarburization technology, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, can solve the problems of easy degradation of alcohol amine solvents, high equipment corrosion, and high regeneration energy consumption, and achieve high CO2 absorption. load, low desorption energy, and the effect of reducing decarbonization energy consumption

Active Publication Date: 2020-11-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the disadvantages of the existing alcohol amine decarburization technology that the alcohol amine solvent is easy to degrade and volatilize, after the alcohol amine absorbs the acid gas, the solution is more corrosive to the equipment, and the regeneration energy consumption is high, etc., and aims to provide a functionalized molecular The designed aminoalkylsilane series decarburization solvent and its corresponding decarburization process to overcome the problems of the existing alcohol amine decarburization technology

Method used

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  • A kind of aminohydrocarbyl silane series decarburization solvent and decarburization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 Set up a model test device to treat flue gas volume (dry basis) of 10 Nm 3 / h, the carbon dioxide content is 12%, and the flue gas temperature is 45°C. Aminosilane Decarburization Solvent Volume Flow 0.05 Nm 3 / h, where aminohydrocarbyl silane is NH 2 CH 2 SiMe 3 , wherein the co-solvent low polymerization degree polyethylene glycol mass content is 10%. The temperature in the kettle is 100 ℃, and the pressure in the kettle is 0.4 MPa (absolute pressure) for regeneration under pressure.

[0035] After decarbonization treatment, the carbon dioxide capture rate is 84.7%, and the unit energy consumption of carbon dioxide capture is 1.14 tons of steam / ton of CO 2 , decarburization solvent consumption (basically co-solvent degradation loss) 0.22 Kg / ton of carbon dioxide.

Embodiment 2

[0037] Such as figure 1 Set up a model test device to treat flue gas volume (dry basis) of 10 Nm 3 / h, the carbon dioxide content is 12%, and the flue gas temperature is 45°C. Aminosilane Decarburization Solvent Volume Flow 0.05 Nm 3 / h, where aminohydrocarbyl silane is NH 2 C 2 h 4 NHC 3 h 6 SiMe 3 , wherein the co-solvent low polymerization degree polyethylene glycol mass content is 10%. The temperature in the kettle is 100 ℃, and the pressure in the kettle is 0.4 MPa (absolute pressure) for regeneration under pressure.

[0038] After decarbonization treatment, the carbon dioxide capture rate is 81.5%, and the unit energy consumption of carbon dioxide capture is 1.14 tons of steam / ton of CO 2 , decarburization solvent consumption (basically co-solvent degradation loss) 0.22 Kg / ton of carbon dioxide.

Embodiment 3

[0040] Such as figure 1 Set up a model test device to treat flue gas volume (dry basis) of 10 Nm 3 / h, the carbon dioxide content is 12%, and the flue gas temperature is 45°C. Aminosilane Decarburization Solvent Volume Flow 0.05 Nm 3 / h, where aminohydrocarbyl silane is NH 2 CH 2 SiMe 3 and NH 2 C 2 h 4 NHC 3 h 6 SiMe 3 (molar ratio 1:1), wherein the co-solvent low polymerization degree polyethylene glycol mass content is 10%. The temperature in the kettle is 100 ℃, and the pressure in the kettle is 0.4 MPa (absolute pressure) for regeneration under pressure.

[0041] After decarbonization treatment, the carbon dioxide capture rate is 82.4%, and the unit energy consumption of carbon dioxide capture is 1.14 tons of steam / ton of CO 2 , decarburization solvent consumption (basically co-solvent degradation loss) 0.22 Kg / ton of carbon dioxide.

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Abstract

The invention relates to a decarbonization solvent and process in the technical field of gas separation, and particularly to an amino-alkyl silane series decarbonization solvent and process. The solvent disclosed by the invention has the characteristics of physical absorption and chemical absorption, and also has relatively high thermal stability, high CO2 absorption load, low desorption energy, low volatility, high reaction speed, low cost, mild property, no corrosion to equipment, greenness, environment protection, and the like. The operation method of the corresponding decarbonization process is simple and flexible, and automatic operation can be realized.

Description

technical field [0001] The invention relates to a decarburization solvent and a process in the technical field of gas separation, in particular to an aminohydrocarbylsilane series decarburization solvent and a process. Background technique [0002] Alcohol amine decarburization technology is currently the most feasible and effective acid gas capture technology commercially. This technology is represented by organic alcohol amine solvents such as MEA, MDEA and DEA. Due to its physical properties, it is widely used in the purification of natural gas, coal-fired flue gas, refinery gas and other gases. [0003] Alcohol amine decarburization process is a typical gas-liquid absorption process. First, the gas mixture containing the acid gas to be removed is contacted with the alcohol amine solution. When the absorbent in the absorption unit absorbs the acid gas, it becomes a rich liquid; then the rich liquid is sent to the regeneration unit, and the rich liquid is generally heated...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14B01D53/18B01D53/24
CPCB01D53/1425B01D53/1475B01D53/1493B01D53/18B01D53/24B01D2252/20405Y02C20/40
Inventor 毛松柏刘鹏汪东
Owner CHINA PETROLEUM & CHEM CORP
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