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Alcohol amine type ion liquor-containing compound absorbent capable of capturing carbon dioxide

A technology of ionic liquid and carbon dioxide, which is applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve the problems of fast deterioration of absorbents, loss of absorbents, equipment corrosion, etc., and achieve greening of the preparation process and increased stability high performance and low regenerative energy consumption

Inactive Publication Date: 2013-06-26
SHANGHAI BOILER WORKS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the technical problems of high energy consumption in the adsorption process of the existing carbon dioxide adsorbent, serious equipment corrosion, fast deterioration of the absorbent, and strong volatility causing the loss of the absorbent

Method used

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  • Alcohol amine type ion liquor-containing compound absorbent capable of capturing carbon dioxide
  • Alcohol amine type ion liquor-containing compound absorbent capable of capturing carbon dioxide
  • Alcohol amine type ion liquor-containing compound absorbent capable of capturing carbon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Preparation of ionic liquid

[0032] Example 1: Preparation of ionic liquid

[0033] 1) Device: a three-necked flask; the three-necked flask is equipped with a stirring blade, a dropping funnel and a condensing reflux tube.

[0034] 2) Raw materials: Triethylenetetramine (TETA); Tetrafluoroboric acid (HBF 4 );water.

[0035] 3) Preparation method: place a three-necked flask in an ice water bath; weigh triethylenetetramine (TETA), dilute it with water to a mass concentration of 60wt%, pour it into a three-necked flask and stir; TETA) equimolar tetrafluoroborate (HBF 4 ), dilute it with water to a mass concentration of 60wt%, pour it into a dropping funnel, and slowly drip into a three-necked flask; after the addition is complete, continue to stir in an ice water bath for 3 hours; evaporate the reacted liquid to remove 95 % Moisture, use a vacuum drying oven to dry at 60 ℃ for 24 hours to obtain [TETAH] + [BF 4 ] - Ionic liquid.

Embodiment 2

[0036] Example 2: Configuration of composite absorbent

[0037] 1) Raw material: MDEA; [TETAH] + [BF 4 ] - Ionic liquid (prepared by the method of Example 1); corrosion inhibitor: sodium vanadate; antioxidant: a mixture of sodium sulfite and copper acetate with a weight ratio of 1:1; deionized water.

[0038] 2) Preparation method: Combine 300g MDEA and 100g [TETAH] + [BF 4 ] - The ionic liquid is dissolved in deionized water, 8g of corrosion inhibitor and 8g of antioxidant are added, the volume is made to 1L with deionized water, and the mixture is stirred evenly to obtain a composite absorbent. Place the obtained absorbent in a constant temperature water tank of 30°C for 10 minutes, so that the temperature of the absorbent reaches the set temperature of 30°C, stir evenly, and set aside.

Embodiment 3

[0039] Example 3: Configuration of composite absorbent

[0040] 1) Raw material: MDEA; [TETAH] + [BF 4 ] - Ionic liquid (prepared by the method of Example 1); corrosion inhibitor: sodium vanadate; antioxidant: a mixture of sodium sulfite and copper acetate in a weight ratio of 1:1; deionized water.

[0041] 2) Preparation method: mix 200g MDEA and 200g [TETAH] + [BF 4 ] - The ionic liquid is dissolved in deionized water, 8g of corrosion inhibitor and 8g of antioxidant are added, the volume is made up to 1L with deionized water, and the mixture is stirred evenly to obtain an absorbent. Place the obtained absorbent in a constant temperature water tank of 30°C for 10 minutes, so that the temperature of the absorbent reaches the set temperature of 30°C, stir evenly, and set aside.

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PUM

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Abstract

The invention discloses an alcohol amine type ion liquor-containing compound absorbent capable of capturing carbon dioxide. The alcohol amine type ion liquor-containing compound absorbent is characterized by comprising an absorption component, a corrosion inhibitor, an antioxidant and solvent, wherein the absorption component consists of N-Methyldiethanolamine and ionic liquid (TETAH)<+>(BF4)<->. The invention provides a compound absorbent which is high-efficiency, good in stability, easy to desorb, and low in regeneration energy consumption and can capture carbon dioxide. Organic amine and ionic liquid are mixed, the organic alcamines has the characteristics of being high in absorption rate and large in absorption capacity and the ionic liquid has the properties of low steam pressure and good stability and the like, thus supplementing each other so as to improve the processing capacity of carbon dioxide.

Description

Technical field [0001] The invention belongs to the technical field of gas separation, and relates to a method of gas separation, in particular to a method of an alcohol-amine-containing ionic liquid composite absorbent for capturing carbon dioxide gas from a mixed gas. Background technique [0002] The greenhouse effect caused by carbon dioxide emissions has caused serious 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 an issue of great concern to all countries in the world. As a valuable carbon resource, carbon dioxide is widely used in various fields such as chemical industry, food, medicine, etc. 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, less than 1% of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
CPCY02A50/20Y02C20/40
Inventor 张艳伟葛学利乌晓江倪建军池国镇张建文
Owner SHANGHAI BOILER WORKS
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