Absorbent for collecting carbon dioxide

A carbon dioxide and absorbent technology, applied in chemical instruments and methods, dispersed particle separation, air quality improvement, etc., can solve the problems of high energy consumption and low absorption capacity of absorbent, and achieve low energy consumption and high absorption capacity for desorption. , the effect of fast absorption rate

Inactive Publication Date: 2015-04-22
SHANGHAI BOILER WORKS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0030] The purpose of the present invention is to provide a novel absorbent for capturing carbon dioxide to solve the technical problems of high energy consumption and low absorption capacity of the existing absorbent when removing carbon dioxide from the mixed gas

Method used

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  • Absorbent for collecting carbon dioxide
  • Absorbent for collecting carbon dioxide
  • Absorbent for collecting carbon dioxide

Examples

Experimental program
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Effect test

Embodiment 1

[0047] This example discloses seven absorbents for capturing carbon dioxide, all of which are composed of an aqueous solution of 1-amino-4-(2-hydroxyethyl)-piperazine. The 1-amino-4-(2-hydroxyethyl The mass concentration of base)-piperazine is respectively 10%, 20%, 25%, 30%, 40%, 50% and 70%.

[0048] In a glass reactor placed in a constant temperature water bath (40°C), add the above-mentioned seven kinds of absorbents for capturing carbon dioxide respectively, and feed them with a volume composition of 14% CO under normal pressure. 2 , 86%N 2 mixed gas, while the absorption liquid was stirred at a constant temperature of 40°C. Gas chromatography (Agilent 7890B) was used to analyze CO in the outlet gas of the reactor. 2 concentration, when its concentration is the same as that of the imported CO 2 When the concentration is equal, the absorbent has reached the saturated absorption capacity. Then, the air intake was stopped, while the temperature of the water bath was kept...

Embodiment 2

[0051] This example discloses eight absorbents for capturing carbon dioxide, all of which are composed of 1-amino-4-(2-hydroxyethyl)-piperazine and compounds capable of adjusting absorption rate and absorption capacity. Among them, the above-mentioned eight kinds of absorbents for capturing carbon dioxide use the compound with the function of adjusting the absorption rate and absorption capacity and 1-amino-4-(2-hydroxyethyl)-piperazine and the compound with the function of adjusting the absorption rate and absorption capacity The weight ratios of the functional compounds are shown in the table below:

[0052]

[0053] The preparation methods are as follows: dissolving 1-amino-4-(2-hydroxyethyl)-piperazine and compounds with the function of adjusting absorption rate and absorption capacity in water to prepare an aqueous solution with a total mass concentration of 30%.

[0054] In a glass reactor placed in a constant temperature water bath (40°C), add the above-mentioned eig...

Embodiment 3

[0056] Absorbent of the present invention is applied to such as figure 1 In the shown Shanghai boiler flue gas carbon dioxide recovery pilot plant, the process of the plant is conventional CO 2 Absorption and desorption process, the absorption tower 1 is sprayed with the first absorbent for capturing carbon dioxide in Example 2, the boiler flue gas is absorbed by the absorbent to form treated flue gas, and the absorption liquid that has absorbed carbon dioxide is passed through the rich The liquid pump 2 and the lean / rich liquid heat exchanger 3 enter the desorption tower 4, and form CO after desorption 2 product, the desorbed absorption liquid re-enters the absorption tower 1 after passing through the lean liquid pump 5 and the first cooler 6. Boiler flue gas, treated flue gas and CO 2 The composition of the product is shown in the table below. The average temperature of the absorption tower is 50°C, and the maximum temperature of the desorption tower is 106°C. CO 2 The ...

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Abstract

The invention provides an absorbent for collecting carbon dioxide. The absorbent for collecting carbon dioxide is characterized by comprising a solution containing 1-amidogen-4-(2-ethoxy)-piperazine or a -amidogen-4-(2-ethoxy)-piperazine solution. The absorbent for collecting carbon dioxide has the advantages that the rate of absorption and the absorption capacity are high, and energy consumption for absorption release is low.

Description

technical field [0001] The invention belongs to the technical field of gas separation, in particular to an absorbent for recovering carbon dioxide from a gas mixture containing carbon dioxide. Background technique [0002] Carbon dioxide is a greenhouse gas. As countries all over the world pay attention to the global warming effect, the emission of carbon dioxide has attracted the attention of the whole world. Known technologies for removing carbon dioxide from mixed gases include chemical absorption technology, physical absorption technology, membrane separation technology, adsorption separation technology and cryogenic separation technology. [0003] Chemical absorption is a common method for removing carbon dioxide. The early chemical absorption methods used to separate carbon dioxide were the hot potash method and the alcohol amine method. Yet, because the heat potash absorption rate of single component is slower, those skilled in the art have developed the heat potas...

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 池国镇韩坤坤倪建军
Owner SHANGHAI BOILER WORKS
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