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Preparation method of organic-inorganic porous composite material for absorbing carbon dioxide

A carbon dioxide adsorption, inorganic porous technology, applied in chemical instruments and methods, inorganic chemistry, through adsorption, etc., can solve the problems of poor adsorbent performance, low adsorption efficiency, secondary pollution, etc., achieve good thermal stability, low desorption The effect of temperature and high adsorption capacity

Active Publication Date: 2010-08-18
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the preparation of this alcohol amine solution is relatively simple, it has many disadvantages: first, this adsorbent has poor performance and low adsorption efficiency
Second, the weight of the liquid amine adsorbent is large
Third, in the adsorption and desorption of CO 2 The loss of amine in the process makes the regeneration cycle efficiency low and causes secondary pollution to the environment
[0007] However, these adsorption materials have the following problems: the adsorption effect is poor, it is necessary to introduce more amino groups into the porous material, and try to make these amino groups highly dispersed into the mesoporous material to improve the adsorption capacity and achieve good adsorption effect ; The carrier needs to remove the template agent, which causes waste of energy and pollution to the environment during the process of removing the template agent by roasting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 1.2g of PMHS dropwise into a conical flask with 180ml of absolute ethanol, then add alkaline solution, and stir for 20 hours, so that the active hydrogen atoms on the PMHS molecules are completely replaced by ethoxy groups. 0.5 g of deionized water was added dropwise to the above solution, and after stirring for 0.5 h, 12 g of ethyl orthosilicate was added dropwise. Stirred for 1h, recorded as solution A. Dissolve 1.70g of polyethyleneimine in 10ml of ethanol and stir for 1h to fully dissolve the polyethyleneimine to obtain solution B. Solution B was added to solution A, stirred for 3 hours, and left to age for 3 days to obtain a gel. The obtained gel was dried in an oven at 80°C for 24 hours, and the ethanol in the system was removed to obtain a sample with a polyethyleneimine content of 30 wt%, which was denoted as S1-30. The adsorption data was measured by gravimetric method. See Table 1 for the data.

Embodiment 2

[0022] Add 1.2g of PMHS dropwise into a conical flask with 180ml of absolute ethanol, then add alkaline solution, and stir for 20 hours, so that the active hydrogen atoms on the PMHS molecules are completely replaced by ethoxy groups. 0.5 g of deionized water was added dropwise to the above solution, and after stirring for 0.5 h, 12 g of ethyl orthosilicate was added dropwise. Stirred for 1h, recorded as solution A. Dissolve 2.26g of polyethyleneimine in 10ml of ethanol and stir for 1h to fully dissolve the polyethyleneimine to obtain solution B. Solution B was added to solution A, stirred for 3 hours, and left to age for 3 days to obtain a gel. The obtained gel was dried in an oven at 80° C. for 24 hours to remove ethanol in the system to obtain a sample with a polyethyleneimine content of 40 wt%, which was designated as S1-40. The adsorption capacity data were measured by gravimetric method, and the adsorption capacity data are shown in Table 1.

Embodiment 3

[0024] Add 1.2g of PMHS dropwise into a conical flask with 180ml of absolute ethanol, then add alkaline solution, and stir for 20 hours, so that the active hydrogen atoms on the PMHS molecules are completely replaced by ethoxy groups. 0.5 g of deionized water was added dropwise to the above solution, and after stirring for 0.5 h, 12 g of ethyl orthosilicate was added dropwise. Stirred for 1h, recorded as solution A. Dissolve 2.83g of polyethyleneimine in 10ml of ethanol and stir for 1h to fully dissolve the polyethyleneimine to obtain solution B. Solution B was added to solution A, stirred for 3 hours, and left to age for 3 days to obtain a gel. The obtained gel was dried in an oven at 80°C for 24 hours, and the ethanol in the system was removed to obtain a sample with a polyethyleneimine content of 50 wt%, which was denoted as S1-50. The adsorption data was measured by gravimetric method. See Table 1 for the data.

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Abstract

The invention relates to a preparation method of a organic-inorganic porous composite material for absorbing carbon dioxide, which comprises the following steps: adding hydrogen-containing methyl polysiloxane into anhydrous ethanol, adding alkaline solution, mixing for 20-24 hours, adding deionized water into the solution, mixing for 0.5-5 hour(s), adding ethyl orthosilicate, mixing for 1-6 hour(s) to obtaining Solution A, dissolving organic amine into ethanol, mixing for 1-3 hour(s) to obtaining Solution B, adding the Solution B into the Solution A, mixing 3-5 hours, keeping static and aging for 3-5 days to obtain gel, and drying the gel for 24-30 hours at the temperature of 80-100 DEG C to remove ethanol in the system, thereby obtaining the organic-inorganic porous composite material. The invention has the advantages of low desorption temperature and high adsorption capacity. Simultaneously, the invention needs no template removing agent, thereby saving the cost and achieving good thermal stability.

Description

technical field [0001] The invention relates to a method for preparing a porous material for efficiently absorbing carbon dioxide, in particular to a method for preparing an organic-inorganic porous composite material for efficiently absorbing carbon dioxide. Background technique [0002] Currently, fossil fuels such as coal and oil account for more than 85% of the energy currently consumed in the world. In this century, these fuels still dominate. However, the burning of fossil fuels has released a large amount of carbon dioxide into the atmosphere, causing the atmosphere to form a terrible greenhouse effect, which has brought disastrous effects on the living environment of human beings. Therefore, effective technologies must be developed to control carbon dioxide emissions, and the development of adsorbents with high selectivity and high adsorption capacity for carbon dioxide undoubtedly has important theoretical and practical significance. [0003] At present, commonly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30B01D53/02C01B31/20C01B32/50
CPCY02C10/08Y02C20/40Y02P20/151
Inventor 孙予罕魏伟付新赵宁肖福魁闻霞
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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