Semi-clathrate hydrate stable at room temperature and application thereof to carbon dioxide capture

A high-pressure carbon dioxide, semi-cage technology, applied in educts, organic chemistry, chemical instruments and methods, etc., can solve the problems of complex reactor design, incomplete hydrate conversion, high energy consumption, etc., and achieve good regeneration performance, The effect of reducing energy and capturing efficiency is high

Inactive Publication Date: 2016-02-24
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the mechanical strengthening method is helpful to the formation of hydrates, there are still problems such as complex reactor design, high energy consumption, and incomplete hydrate conversion.

Method used

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  • Semi-clathrate hydrate stable at room temperature and application thereof to carbon dioxide capture

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Effect test

Embodiment 1

[0019] A semi-clathrate hydrate stable at room temperature is a tetraisopentylammonium bromide aqueous solution with a mass fraction of 35%, which is prepared by uniformly mixing 35g of tetraisopentylammonium bromide and 65g of water.

[0020] The application of the room temperature stable semi-clathrate hydrate in capturing carbon dioxide is the method of utilizing the room temperature stable semi-clathrate hydrate to capture carbon dioxide, which specifically includes the following steps: at 25°C, add 100g In the above-mentioned tetraisopentylammonium bromide aqueous solution, it is 3 MPa CO2 that is charged with a pressure. 2 , calculate the CO at a certain time interval by changing the pressure in the reactor 2 The results are shown in Table 1.

Embodiment 2

[0022] A semi-clathrate hydrate stable at room temperature is a tetraisopentylammonium bromide aqueous solution with a mass fraction of 45%, which is prepared by uniformly mixing 45g of tetraisopentylammonium bromide and 55g of water.

[0023] The application of the room temperature stable semi-clathrate hydrate in capturing carbon dioxide is the method of utilizing the room temperature stable semi-clathrate hydrate to capture carbon dioxide, which specifically includes the following steps: at 25°C, add 100g In the above-mentioned tetraisopentylammonium bromide aqueous solution, it is the CO that the pressure is 2 MPa. 2 , calculate the CO at a certain time interval by changing the pressure in the reactor 2 The results are shown in Table 1.

Embodiment 3

[0025] A semi-clathrate hydrate stable at room temperature is a tetraisopentylammonium fluoride aqueous solution with a mass fraction of 30%, which is prepared by uniformly mixing 30g of tetraisopentylammonium fluoride and 70g of water.

[0026] The application of the room temperature stable semi-clathrate hydrate in capturing carbon dioxide is the method of utilizing the room temperature stable semi-clathrate hydrate to capture carbon dioxide, which specifically includes the following steps: at 25°C, add 100g The above-mentioned tetraisopentyl ammonium fluoride aqueous solution is filled with CO with a pressure of 2 MPa. 2 , calculate the CO at a certain time interval by changing the pressure in the reactor 2 The results are shown in Table 1.

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Abstract

The invention belongs to the technical field of environmental protection material, and discloses a semi-clathrate hydrate stable at room temperature and application thereof to carbon dioxide capture. The semi-clathrate hydrate is obtained by evenly mixing 100 parts by weight of water and 25-100 parts by weight of tetraisoamyl quaternary ammonium salt. The application is as below: placing the semi-clathrate hydrate in an autoclave, introducing high-pressure carbon dioxide gas at a certain temperature, and reacting to obtain a solid carbon dioxide hydrate with high gas storage density, so as to realize the capture of carbon dioxide. The invention adopts tetraisoamyl quaternary ammonium salt as a stabilizer and promoter to promote the formation of carbon dioxide hydrate, and has the advantages of low formation pressure, good stability at room temperature and high CO2 capture efficiency, and provides technical support for industrial application of carbon dioxide hydrate capture.

Description

technical field [0001] The invention belongs to the technical field of environmental protection materials, and in particular relates to a room temperature stable semi-cage hydrate and its application in capturing carbon dioxide. Background technique [0002] carbon dioxide (CO 2 ) is recognized as the chief culprit of the greenhouse effect, and its emission, capture and storage have attracted the attention of more and more countries and international organizations. my country is a developing country dominated by coal, and the CO produced by the combustion of coal and other fossil fuels 2 It has caused a huge impact on the environment. Today, when vigorously advocating low-carbon life and healthy life, capturing greenhouse gases in the atmosphere is of great significance to the sustainable development of the environment and economy and society. Traditional CO 2 Capture methods include chemical methods, physical methods, and biological methods. These methods have their own ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C211/63B01D53/14
CPCB01D53/1475B01D2252/204B01D2257/504B01D2258/0283C07C211/63Y02C20/40Y02P20/151
Inventor 王卫星蔡元浩李亮陈玉龙孙逸莹
Owner SOUTH CHINA UNIV OF TECH
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