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Composite absorbent for capturing flue gas carbon dioxide based on membrane contactor and its application method

A technology of membrane contactor and carbon dioxide, applied in the fields of chemical industry, resources and environment, to achieve the effect of not easy to degrade, strong absorption capacity, and small reaction heat

Active Publication Date: 2016-03-23
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, judging from the literature and patents published at home and abroad, the traditional absorbents with MEA as the main body can no longer meet the needs of practical applications. The absorbent can meet the requirements of various aspects such as high absorption load, which can optimize the economic benefit of practical application

Method used

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  • Composite absorbent for capturing flue gas carbon dioxide based on membrane contactor and its application method
  • Composite absorbent for capturing flue gas carbon dioxide based on membrane contactor and its application method
  • Composite absorbent for capturing flue gas carbon dioxide based on membrane contactor and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: as Figure 1 to Figure 6 As shown, in this example, the composite absorbent based on the membrane contactor to capture flue gas carbon dioxide: it is formed by compounding MDEA and MEA with a molar ratio of 2:3; the composite absorbent based on the membrane contactor to capture flue gas carbon dioxide: It is a compound absorbent for capturing carbon dioxide gas in flue gas with a total amine concentration of 0.5mol / L.

[0032] Add the composite absorbent solution based on the membrane contactor to capture flue gas carbon dioxide into the desorber 4, turn on the agitator in the desorber 4, mix the absorption liquid in the system evenly, and heat the absorption liquid in the desorber 4 to 105°C , adjust the outlet valve of the gas path, and let in CO with a concentration of 15% at the inlet point A at an outlet flow rate of 1L / min. 2Mixed gas (real flue gas concentration), open cooler 5, cooler 7 at the same time, and turn on the absorption liquid pump 6 to...

Embodiment 2

[0034] Example 2: The compound absorbent based on membrane contactor to capture flue gas carbon dioxide in this example: It is formed by compounding MDEA and PG with a molar ratio of 2:3; the compound absorbent based on membrane contactor to capture flue gas carbon dioxide : It is a compound absorbent for capturing carbon dioxide gas in flue gas with a total amine concentration of 0.5mol / L.

[0035] Add the composite absorbent solution based on the membrane contactor to capture flue gas carbon dioxide into the desorber 4, turn on the agitator in the desorber 4, mix the absorption liquid in the system evenly, and heat the absorption liquid in the desorber 4 to 105°C , adjust the outlet valve of the gas path, and let in CO with a concentration of 15% at the inlet point A at an outlet flow rate of 1L / min. 2 Mixed gas (real flue gas concentration), turn on cooler 5 and cooler 7 at the same time, and turn on the absorption liquid pump 6 to make the absorption liquid go along the de...

Embodiment 3

[0037] Example 3: The compound absorbent based on membrane contactor to capture flue gas carbon dioxide in this example: it is formed by compounding MDEA and DETA with a molar ratio of 1:4; the compound absorbent based on membrane contactor to capture flue gas carbon dioxide : It is a compound absorbent for capturing carbon dioxide gas in flue gas with a total amine concentration of 0.5mol / L.

[0038] Add the composite absorbent solution based on the membrane contactor to capture flue gas carbon dioxide into the desorber 4, turn on the agitator in the desorber 4, mix the absorption liquid in the system evenly, and heat the absorption liquid in the desorber 4 to 105°C , adjust the outlet valve of the gas path, and let in CO with a concentration of 15% at the inlet point A at an outlet flow rate of 1L / min. 2 Mixed gas (real flue gas concentration), turn on cooler 5 and cooler 7 at the same time, and turn on the absorption liquid pump 6 to make the absorption liquid go along the ...

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Abstract

The invention relates to the technical field of resource environment and chemical engineering and especially relates to a composite absorbent for capturing carbon dioxide in flue gas based on a membrane contactor and a use method thereof. The composite absorbent is obtained by compounding of methyldiethanolamine and an alcohol amine. The alcohol amine is a polyamine containing 1-4 amido groups or imino groups. The composite absorbent can be mixed with water according to different ratios. A total amine concentration is in a range of 0.1-1mol / L. For the balance of economy and effects, the optimal total amine concentration is 0.5mol / L. The composite absorbent has a strong capability of absorption of acid gas such as CO2 under a certain condition, is superior to the traditional absorbent containing ethanol amine as a main ingredient, has the advantages of less reaction heat, low desorption temperature, stable chemical properties and no toxicity, and is conducive to industrial application.

Description

technical field [0001] The invention relates to resource environment and chemical technology, in particular to a composite absorbent for capturing flue gas carbon dioxide based on a membrane contactor and a use method thereof. Background technique [0002] In order to effectively deal with environmental degradation, develop low-carbon technology and low-carbon economy, control and reduce CO 2 Emissions have become an important strategic choice for countries around the world to deal with climate warming. As a country that uses thermal power generation as its main power generation method, my country's carbon dioxide situation is particularly impressive. [0003] As the most important greenhouse gas, carbon dioxide mainly exists in the flue gas after the combustion of fossil fuels (coal, petroleum), and captures CO from the flue gas. 2 It can not only provide an economical and convenient source of oil-displacement gas for the petroleum industry, but also reduce greenhouse gas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14B01D53/22
CPCY02A50/20Y02C20/40
Inventor 陈蕊于琪姚宏崔连喜
Owner BEIJING JIAOTONG UNIV
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