Preparation method of renewable low concentration CO2 high efficient absorption material

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...

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.

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