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Anhydrous ionic liquid and application thereof in flue gas desulfurization

A technology of water ions and ionic liquids, which is applied in the field of anhydrous ionic liquids, can solve problems such as equipment corrosion, and achieve the effects of easy transportation, simple preparation methods, and good industrial application prospects

Inactive Publication Date: 2020-06-09
CHINA TIANCHEN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of low-viscosity anhydrous ionic liquid, to overcome the problem that the equipment exists in the aqueous ionic liquid existing in the prior art

Method used

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  • Anhydrous ionic liquid and application thereof in flue gas desulfurization
  • Anhydrous ionic liquid and application thereof in flue gas desulfurization
  • Anhydrous ionic liquid and application thereof in flue gas desulfurization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Preparation of ionic liquids : When m=0, and n=0, mix 2-amino-2-methyl-1-propanol (AMP) with benzoic acid (BA) in the same amount at 20°C, stir for 30min, and generate Amino acid salt [AMP] + [BA] - . The obtained amino acid salt is added into benzyl alcohol to prepare anhydrous ionic liquid. Wherein the amount of 2-amino-2-methyl-1-propanol (AMP) in the ionic liquid is 20wt%, and the reaction formula of the amino acid salt is

[0062]

[0063] Analysis of Ionic Liquids Before and After Absorption Using TOC : Absorption of SO in simulated flue gas using the above-mentioned ionic liquid 2 ,From image 3 It can be seen that when using ionic liquid to absorb for about 10min, the SO in the simulated flue gas 2 That is, more than 99.79% is absorbed; when the ionic liquid is in contact with the simulated flue gas for 60 minutes, the SO in the simulated flue gas 2 down to 0.0021%. From Figure 4 It can be seen that CO in ionic liquid 2 The initial concentration...

Embodiment 2

[0065] Preparation of ionic liquids : When m=1, and n=1, mix 2-amino-2-methyl-1-butanol (AMB) and phenylacetic acid (PEA) in the same amount at 30°C and stir for 30min to generate Amino acid salt [AMB] + [PEA] - . The obtained amino acid salt is added into phenethyl alcohol to prepare anhydrous ion liquid. Wherein the amount of 2-amino-2-methyl-1-butanol in the ionic liquid is 20wt%, and the reaction formula of the amino acid salt is

[0066]

[0067] Analysis of Ionic Liquids Before and After Absorption Using TOC : Absorption of SO in simulated flue gas using the above-mentioned ionic liquid 2 ,From Figure 5 It can be seen that when using ionic liquid to absorb for about 10min, the SO in the simulated flue gas 2 That is, more than 99.73% is absorbed; when the ionic liquid is in contact with the simulated flue gas for 60 minutes, the SO in the simulated flue gas 2 down to 0.0027%. From Figure 6 It can be seen that CO in ionic liquid 2 The initial concentratio...

Embodiment 3

[0069] Preparation of ionic liquids : when m=2, and n=2, mix 2-amino-2-methyl-1-pentanol (AMPE) and phenylpropionic acid (PBA) in an equal amount at 40°C, stir for 25min, Formation of amino acid salts [AMPE] + [PBA] - . The obtained amino acid salt is added into phenethyl alcohol to prepare anhydrous ion liquid. Wherein the amount of 2-amino-2-methyl-1-pentanol in the ionic liquid is 20wt%, and the reaction formula of the amino acid salt is

[0070]

[0071] Analysis of Ionic Liquids Before and After Absorption Using TOC : Absorption of SO in simulated flue gas using the above-mentioned ionic liquid 2 ,From Figure 7 It can be seen that when using ionic liquid to absorb for about 20min, the SO in the simulated flue gas 2 That is, more than 99.7% is absorbed; when the ionic liquid is in contact with the simulated flue gas for 60 minutes, the SO in the simulated flue gas 2 down to 0.003%. From Figure 8It can be seen that CO in ionic liquid 2 The initial concentr...

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Abstract

The present invention provides an anhydrous ionic liquid, the anhydrous ionic liquid comprises a solvent and an amino acid salt, and the amino acid salt is obtained by carrying out a magnetic stirringreaction on two components at 20-40 DEG C for 10-30 min in an equimolar manner. The invention also provides a method for absorbing SO2 in flue gas by using the anhydrous ionic liquid, and a device used in the method. An absorption method comprises the specific steps of flue gas treatment, establishment of ionic liquid circulation, flue gas absorption and ionic liquid regeneration. The anhydrous ionic liquid disclosed by the invention is simple in preparation method and low in cost. The influence of ionic liquid corrosivity does not need to be considered, so that equipment investment is reduced. The anhydrous ionic liquid is low in vapor pressure, and the problems of loss and secondary pollution caused by volatilization of a traditional absorbent are avoided. The anhydrous solvent is low in viscosity, easy to convey and good in industrial application prospect.

Description

technical field [0001] The invention belongs to the field of ionic liquids, in particular to an anhydrous ionic liquid and its use for absorbing sulfur dioxide in flue gas. Background technique [0002] my country's coal resources are richer than other energy sources. The energy material used for power generation is mainly coal, which contains a large amount of S elements, and a large amount of SO will be produced during the combustion process. 2 , NO x Such acidic polluting gases are discharged into the atmosphere along with the flue gas. to SO 2 Emission control is an important subject of social concern. Meanwhile, SO 2 It is also an important chemical raw material. Therefore, to SO 2 The control and recovery of waste is of great significance. [0003] Studies have found that ionic liquids have many excellent properties, such as low vapor pressure, good thermal stability, and designability. As a new type of absorbent, ionic liquids also have strong advantages in flu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
CPCB01D53/1425B01D53/1481B01D53/1493B01D2252/30B01D2258/0283
Inventor 郭超孙宁司云飞段强刘健胡文佳李江川
Owner CHINA TIANCHEN ENG
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