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A kind of preparation method of renewable low-concentration CO2 high-efficiency adsorption material

An adsorption material, low-concentration technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of cyclic adsorption/desorption adsorption capacity decrease, difficulty in ensuring material uniformity, long preparation period, etc., and achieve large adsorption capacity. , high nitrogen content, good uniformity

Active Publication Date: 2016-02-03
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its CO 2 Both the content of water and water are high, and there are also problems such as long preparation cycle and difficulty in ensuring material uniformity
[0010] In summary, it can be seen that the current solid-state amines are effective for low-concentration CO 2 The adsorption capacity of the method is generally small, and there are shortcomings such as a decrease in the adsorption capacity of the cycle adsorption / desorption or a long preparation cycle and poor uniformity, so the above methods all have certain defects.

Method used

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  • A kind of preparation method of renewable low-concentration CO2 high-efficiency adsorption material
  • A kind of preparation method of renewable low-concentration CO2 high-efficiency adsorption material
  • A kind of preparation method of renewable low-concentration CO2 high-efficiency adsorption material

Examples

Experimental program
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Effect test

Embodiment 1

[0034] (1) Mix ethyl orthosilicate, water, ethanol, and hydrochloric acid in a molar ratio of 1:1:5:0.0018, and after standing for 2 hours, add ammonia water in the amount of hydrochloric acid and other substances, and press ethyl orthosilicate and The molar ratio of water is 1:7 to make up water, adjust the temperature to -15°C to obtain silica sol; mix aminopropyltriethoxysilane (the amount of the substance is 0.65 times that of tetraethyl orthosilicate) and ethanol in a molar ratio of 1 : 5 mix evenly, and adjust the temperature to -15°C to obtain an aminosiloxane solution;

[0035] (2) Mix the silica sol and the aminosiloxane solution uniformly to obtain a mixed sol. Adjust the simethicone oil to -15°C, and under the condition of mechanical stirring at a stirring speed of 200r / min, add the mixed sol and simethicone oil into the simethicone oil at a volume ratio of 1:5 to obtain a mixed sol suspension liquid, keep the stirring speed until the mixed sol gels to obtain a sph...

Embodiment 2～24

[0046] The process parameters used in Examples 2 to 24 are shown in Table 1, because they affect the renewable low-concentration CO 2 The process parameters of the main performance of high-efficiency adsorption materials are mainly the molar ratio of water to siloxane in silica sol, the molar ratio of ethanol to siloxane, the molar ratio of aminosiloxane to siloxane, the type of aminosiloxane and 5 parameters such as gel temperature, and the type and amount of acid and alkaline catalysts and the type of siloxane mainly affect the gel time, but have little impact on its main performance, so the embodiments 2-24 mainly change these 5 parameters. Process parameters to further explain the present invention. Except the technological parameter written in the table, all the other technological parameters are identical with embodiment 1.

[0047] In Table 1, the process parameters of Examples 2 to 17 are set using the idea and method of orthogonal design (that is, the aminosiloxane i...

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Abstract

The invention discloses a preparation method of a renewable low concentration CO2 high efficient absorption material, and aims to provide a preparation method of a renewable low concentration CO2 high efficient absorption material which has the advantages of low energy consumption, good absorption selectivity, and large absorption quantity of low partial pressure CO2. The technical scheme comprises the following steps: preparing silica sol and an amino siloxane solution, evenly mixing the silica sol and the amino siloxane solution, then mixing the mixed sol with dimethyl silicone oil, stirring to form suspension liquid, stirring at the same temperature of the sol until gel is formed; then heating the mixture to a temperature of 40 to 60 DEG C, allowing the mixture to stand still for aging for 1 to 9 days at a temperature of 40 to 60 DEG C, filtering to obtain the spherical gel; and finally putting the spherical gel and ethanol into supercritical drying equipment to dry the gel. The prepared renewable low concentration CO2 high efficient absorption material has the advantages of good uniformity, high nitrogen content, high specific surface area, large pore volume, and large CO2 absorption capacity.

Description

technical field [0001] The present invention relates to a CO 2 Preparation method of adsorbent material, especially related to a kind of renewable low-concentration CO 2 Preparation method of high-efficiency adsorption material. technical background [0002] carbon dioxide (CO 2 ) is one of the components of the natural atmosphere, the content in the atmosphere is very low (about 0.03%), and will not affect human activities. However, in confined spaces such as submarines, space stations, manned deep submersibles, and underground defense fortifications, due to personnel breathing (under calm conditions, adults exhale 20-25 LCO per hour). 2 ) and other reasons CO 2 The concentration keeps rising. The study found that when CO 2 When the concentration is greater than 1% (partial pressure about 1KPa), personnel will appear dizzy, slow thinking and other CO 2 Symptoms of poisoning. Therefore excess CO must be removed 2 to ensure the health of personnel. [0003] Solid am...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30B01D53/02
Inventor 冯坚岳晨午姜勇刚冯军宗陈旭
Owner NAT UNIV OF DEFENSE TECH
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