Inorganic salt type carbon dioxide absorbent

A carbon dioxide and absorbent technology, applied in chemical instruments and methods, separation of dispersed particles, air quality improvement, etc., can solve the problems of large operating loss, unfriendly environment, easy degradation, etc., and achieve reduced operating costs, environmental friendliness, and easy Degradation effect

Inactive Publication Date: 2018-11-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problems of traditional organic amine absorbents such as easy degradation, large operating loss, and unfriendly environment. In addition, this absorbent has low cost and is suitable for containing CO 2 various air sources
The technical problem to be solved in the present invention is to propose an inorganic salt carbon dioxide absorbent to solve the problems of traditional organic amine absorbents such as easy degradation, large operating loss, and unfriendly environment

Method used

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  • Inorganic salt type carbon dioxide absorbent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Raw gas intake volume is 3.5Nm 3 , the circulation volume is 12L / h, the regeneration heating capacity is 30% or 35%, the absorbent includes potassium sarcosinate 2.3mol / L, ammonia water 0.2mol / L, cobalt nitrate hexahydrate 2g / L, 1-butyl-3-methyl The imidazole tetrafluoroborate is 1.6 mol / L, and the rest is water. According to practical experience, the operating loss is mainly the amount of the part that is taken away by the absorbent during the discharge of the purified gas. Therefore, the alkalinity (mol / L) in the purified gas condensate is measured and recorded as M 净 , and the capture capacity is recorded as the capture rate under the same conditions.

[0019] The results are shown in Table 1 below.

Embodiment 2

[0024] Raw gas intake is 3.5 Nm 3 , the circulation rate is 12L / h, the regeneration heating capacity is 30% or 35%, the absorbent includes potassium glycinate 2.2mol / L, ammonia water 0.3mol / L, cobalt nitrate hexahydrate 2.5g / L, 1-butyl-3-methyl Imidazolium tetrafluoroborate is 1.6mol / L, and the rest is water. According to practical experience, the operating loss is mainly the amount of the part that is taken away by the absorbent during the discharge of the purified gas. Therefore, the alkalinity (mol / L) in the purified gas condensate is measured and recorded as M 净 , and the capture capacity is recorded as the capture rate under the same conditions. The results are shown in Table 1 below:

Embodiment 3

[0026] Raw gas intake is 3.5 Nm 3 , the circulation rate is 12L / h, the regeneration heating capacity is 30% or 35%, the absorbent includes potassium glycinate 1.8mol / L, potassium 2-methylalanine 0.5mol / L, ammonia water 0.2mol / L, cobalt nitrate hexahydrate 2g / L, 1-ethyl-3-methylimidazole acetate 2mol / L, the rest is water. According to practical experience, the operating loss is mainly the amount of the part that is taken away by the absorbent during the discharge of the purified gas. Therefore, the alkalinity (mol / L) in the purified gas condensate is measured and recorded as M 净 , and the capture capacity is recorded as the capture rate under the same conditions. The results are shown in Table 1 below.

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Abstract

The invention relates to an inorganic salt type carbon dioxide absorbent and belongs to the field of gas separation and purification. The absorbent is prepared from amino acid salt, ionic liquid, ammonia water and a stabilizer, wherein the amino acid salt is potassium salt or sodium salt of amino acid, the melting point of the ionic liquid is greater than 5 DEC below zero, guarant viscosity is (40DEG C) is smaller than 20 centipoise and the mass content is 10 to 45 percent. By utilizing the ultralow vapor pressure of the inorganic salt absorbent, volatile loss in the operation of the inorganic salt absorbent is greatly reduced, and further the operating cost is greatly reduced. In addition, the absorbent has the advantages of environment friendliness, low possibility of degradation and capability of greatly prolonging the service life; the absorbent is suitable for a variety of gas sources, and is equally effective for a carbon dioxide gas source with higher oxygen content.

Description

technical field [0001] The invention relates to an inorganic salt carbon dioxide absorbent, which belongs to the field of gas separation or purification. The absorbent mainly includes amino acid salts, ionic liquids, ammonia water, stabilizers and the like. The absorbent has the advantages of not easy to degrade, low volatilization loss during operation, environmental friendliness, etc., and at the same time has good carbon dioxide capture performance and is suitable for industrial capture devices of various carbon dioxide gas sources. Background technique [0002] With the further development of human society, CO 2 A large amount of emissions have led to the greenhouse effect and frequent extreme weather, which has attracted great attention from governments around the world. my country's CO in 2015 2 The emission is nearly 8 billion tons, accounting for 25% of the global total, ranking first in the world. Continuing growth in fossil fuel use and CO in China 2 The contr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
CPCB01D53/1475B01D2252/102B01D2252/20473B01D2252/20494Y02A50/20Y02C20/40
Inventor 毛松柏黄钟斌
Owner CHINA PETROLEUM & CHEM CORP
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