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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 and other directions, can solve the problems of poor adsorbent performance, low adsorption efficiency, secondary pollution, etc., to achieve good thermal stability, low desorption and other problems. With temperature, cost saving effect

Active Publication Date: 2012-06-27
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] 1.2g of PMHS was added dropwise to a conical flask with 180ml of absolute ethanol, then an alkaline solution was added and stirred for 20h, so that the active hydrogen atoms on the PMHS molecule were 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. Stir for 1 h and record as solution A. Dissolve 1.70 g of polyethyleneimine into 10 ml of ethanol, and stir for 1 h to fully dissolve the polyethyleneimine to obtain solution B. Add solution B to solution A, stir for 3 hours, and then stand for aging for 3 days to obtain 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 recorded as S1-30. The adsorption amount was measured by gravimetric method. The data are shown in Table 1.

Embodiment 2

[0022] 1.2g of PMHS was added dropwise to a conical flask with 180ml of absolute ethanol, then an alkaline solution was added and stirred for 20h, so that the active hydrogen atoms on the PMHS molecule were 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. Stir for 1 h and record as solution A. Dissolve 2.26 g of polyethyleneimine into 10 ml of ethanol, and stir for 1 h to fully dissolve the polyethyleneimine to obtain solution B. Add solution B to solution A, stir for 3 hours, and then stand for aging for 3 days to obtain gel. The obtained gel was dried in an oven at 80° C. for 24 h, and the ethanol in the system was removed to obtain a sample with a polyethyleneimine content of 40 wt %, which was denoted as S1-40. The adsorption amount data were measured by gravimetric method, and the adsorption amount data are shown in Table 1.

Embodiment 3

[0024] 1.2g of PMHS was added dropwise to a conical flask with 180ml of absolute ethanol, then an alkaline solution was added and stirred for 20h, so that the active hydrogen atoms on the PMHS molecule were 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. Stir for 1 h and record as solution A. Dissolve 2.83 g of polyethyleneimine into 10 ml of ethanol, stir for 1 h to fully dissolve the polyethyleneimine, and obtain solution B. Add solution B to solution A, stir for 3 hours, and then stand for aging for 3 days to obtain 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 recorded as S1-50. The adsorption amount was measured by gravimetric method. The data are shown in Table 1.

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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 agingfor 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 adsorbing carbon dioxide, in particular to a method for preparing an organic-inorganic porous composite material for efficiently adsorbing carbon dioxide. Background technique [0002] Currently, fossil fuels such as coal and petroleum account for more than 85% of the energy consumed in the world today. In this century, this type of fuel still dominates. 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 a catastrophic impact 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 carbon dioxide selectivity and high adsorption capacity undoubtedly has important theoretical and practical significance. [0003] At present, the commo...

Claims

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Application Information

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Patent Type & Authority Patents(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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