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Amine-functionalized polyethylene glycol gemini ionic liquid and application thereof

A polyethylene glycol and amine-based functional technology, which is applied to the separation of dispersed particles, gas treatment, separation methods, etc., can solve the problems of affecting carbon dioxide capture effect, slow dissolution and diffusion rate, unfavorable carbon dioxide capture, etc., to avoid Corrosion problems, increased free volume, good application prospects

Active Publication Date: 2020-02-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the absorption of carbon dioxide by conventional ionic liquids belongs to physical absorption, and the absorption rate is slow, which affects the capture effect of carbon dioxide.
In addition, the viscosity of conventional ionic liquids is high, and the dissolution and diffusion rate of carbon dioxide in ionic liquids are slow, which is not conducive to the capture of carbon dioxide. Although the viscosity can be reduced by formulating ionic liquids into aqueous solutions, ionic liquids containing halogen anions are in the presence of water. Severe corrosion problems in the presence of

Method used

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  • Amine-functionalized polyethylene glycol gemini ionic liquid and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] by for the capture solution. Into the system flue gas volume 5Nm 3 / h, the solution circulation rate is 12L / h, the absorption temperature is 20°C, and the regeneration temperature is 70°C. Clean gas CO 2 Content 0.6mol%, absorption rate 0.69mmol CO2 / (m 2 .s), regeneration energy consumption 1291.4kcal / Nm 3 CO 2 .

Embodiment 2

[0028] by for the capture solution. Into the system flue gas volume 5Nm 3 / h, the solution circulation rate is 12L / h, the absorption temperature is 80°C, and the regeneration temperature is 120°C. Clean gas CO 2 Content 0.9mol%, absorption rate 0.66mmol CO2 / (m 2 .s), regeneration energy consumption 1331.7kcal / Nm 3 CO 2 .

Embodiment 3

[0030] by for the capture solution. Into the system flue gas volume 5Nm 3 / h, the solution circulation rate is 12L / h, the absorption temperature is 40°C, and the regeneration temperature is 105°C. Clean gas CO 2 Content 1.4mol%, absorption rate 0.64mmol CO2 / (m 2 .s), regeneration energy consumption 1386.3kcal / Nm 3 CO 2 .

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Abstract

The invention discloses an amine-functionalized polyethylene glycol gemini ionic liquid and a method for capturing carbon dioxide with same. The structure formula of the amine-functionalized polyethylene glycol gemini ionic liquid is shown in the description, in the formula, R1 is alkyl; R2 and R3 are H, CH3 or C2H5; n is an integer; and n is greater than or equal to 2 and less than or equal to 20. Under conditions that the absorbing temperature is 20-80 DEG C, and the regeneration temperature is 70-180 DEG C, the amine-functionalized polyethylene glycol gemini ionic liquid can be used to capture carbon dioxide from flue gas, natural gas reforming gas and synthetic gas, has the advantages of a high absorption rate, a high absorption capacity, a low viscosity, and good absorption selectivity, and so has a good application prospect in the field of large-scale carbon dioxide capturing.

Description

technical field [0001] The invention belongs to the technical field of carbon dioxide capture, and relates to a method for capturing carbon dioxide by using an amine-functionalized polyethylene glycol gemini ionic liquid, so as to realize high-capacity, low-energy-consumption and recyclable capture of carbon dioxide. Background technique [0002] The excessive emission of carbon dioxide has caused serious negative impacts on the global climate and environment. Carbon dioxide emission control is directly related to industrial production, climate, human health and energy benefits, so research on carbon dioxide capture technology is particularly important and urgent. [0003] At present, the use of traditional processes such as alcohol amine aqueous solution to capture carbon dioxide gas has the advantages of low cost, fast capture speed, and large capture volume. However, such capture solvents have solvent volatility, strong corrosion, and difficult regeneration of capture sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/62B01D53/96
CPCB01D53/62B01D53/78B01D53/96B01D2257/504Y02A50/20Y02C20/40
Inventor 江洋洋毛松柏黄钟斌陈曦
Owner CHINA PETROLEUM & CHEM CORP