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Rapid screening method of industrial carbon dioxide trapping agent

A carbon dioxide and screening method technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of not being able to judge the overall performance of carbon dioxide, consuming a lot of time and materials, and high cost, saving time and materials. consumption, reliable results and low operating costs

Active Publication Date: 2016-05-18
HUNAN UNIV
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  • Application Information

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Problems solved by technology

[0006] By studying the solubility, kinetic constants, desorption energy consumption, mass transfer performance and degradation corrosion performance of different amine solvents, there are some disadvantages in comparing and screening more efficient solvent systems, such as requiring a lot of time and materials, resulting in high costs; The solvents studied often only have certain excellent properties, and it cannot be judged whether the overall performance of the solvent to capture carbon dioxide is efficient; therefore, it is of great significance to develop a rapid screening method for high-efficiency carbon dioxide capture agents

Method used

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  • Rapid screening method of industrial carbon dioxide trapping agent
  • Rapid screening method of industrial carbon dioxide trapping agent
  • Rapid screening method of industrial carbon dioxide trapping agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The schematic diagram of the rapid screening experiment of this embodiment is as follows: figure 1 As shown, the specific screening system is monoethanolamine (MEA), diethylaminoethanol (DEEA), N-methyldiethanol (MDEA), 2-amino-2-methyl-1-propanol with a mass fraction of 30%. The five amine solutions of alcohol (AMP) and diethanolamine (DEA), the screening steps are:

[0030] (1) Solvent pretreatment: Load the newly configured 300ml amine solution into a 500ml reactor, and put the reactor in a constant temperature water bath to heat and stabilize to 40°C, keep the liquid phase stirring speed at 1400r / min, The flow rate of carbon dioxide gas is 0.2L / min. The absorption reaction is stopped when the amine solution is half-saturated, and the exhaust gas flow is basically constant at this time. Then put the reactor containing the above-mentioned treated solution into a constant temperature water bath heated and stabilized to 80°C. When the temperature of the solution rises to...

Embodiment 2

[0037] The screened system is MEA and DEEA aqueous solutions with a total concentration of 5mol / L, and the molar ratios are 4:1, 2:3, 2.5:2.5, 3:2, and 1:4, and other screening conditions and steps are as in the example 1. The solution loads after pretreatment were 0.300, 0.251,0.203, 0.161 and 0.087 (mol / mol), respectively.

[0038] The load and circulation capacity of the lean-rich liquid obtained by the absorption and desorption of the lean liquid are shown in Table 2. The circulation capacity values ​​of the five solvents are shown in Table 2. The relative order of circulation capacity is 2.5:2.5> 3:2> 2:3> 1:4> 4:1. The MEA and DEEA mixed amine solution with a total concentration of 5mol / L and a molar ratio of 2.5:2.5 was screened to have the highest carbon capture efficiency.

[0039] Table 2 shows the load and circulation capacity of the rich and poor solution of MEA and DEEA mixed amine solutions with different molar ratios of 5 mol / L.

[0040] Table 2

[0041]

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Abstract

The invention discloses a rapid screening method of an industrial carbon dioxide trapping agent. The method comprises steps as follows: (1), the industrial carbon dioxide trapping agent is used for absorbing carbon dioxide, carbon dioxide is desorbed, and a pretreated carbon dioxide trapping agent is obtained; (2), the temperature of the pretreated carbon dioxide trapping agent is adjusted to 10-50 DEG C, simulated flue gas is introduced into the carbon dioxide trapping agent and stirred for 0.5-2 h, carbon dioxide in the simulated flue gas is absorbed, and a rich solution is obtained; the temperature of the rich solution is adjusted to 75-100 DEG C, nitrogen gas is introduced into the rich solution and stirred for 0.5-2 h, carbon dioxide in the rich solution is desorbed, and a barren solution is obtained; support in the rich solution and support in the barren solution are measured respectively; the support is the ratio of the mole number of carbon dioxide to the mole number of the carbon dioxide trapping agent; the good or bad property of the carbon dioxide trapping agent is judged by comparing the cycling capacity; the cycling capacity refers to a product of a difference value of the support of the rich solution and the support of the barren solution and the concentration of the carbon dioxide trapping agent. The screening method is high in accuracy and low in cost and consumes short time.

Description

Technical field [0001] The invention relates to a rapid screening method for industrialized carbon dioxide capture agents, and belongs to the technical field of carbon dioxide capture. Background technique [0002] In recent years, the global climate change problem caused by the greenhouse effect has increasingly threatened the survival and development of mankind, and carbon dioxide is recognized as one of the most important greenhouse gases. [0003] At present, there are mainly three carbon capture technologies: pre-combustion capture, oxy-combustion capture, and post-combustion capture. Post-combustion capture technology is the most mature technology that is feasible for current economic development. Post-combustion flue gas decarbonization technology mainly includes chemical absorption. Method, physical adsorption method and membrane separation method. [0004] In the chemical solvent absorption method, organic amine solvents are widely used in industrial-scale production proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
CPCB01D53/1475B01D2252/204Y02A50/20Y02C20/40
Inventor 梁志武刘森高红霞罗潇
Owner HUNAN UNIV