Carbon aerogel composite structure, composite filter element, preparation methods of the carbon aerogel composite structure and the composite filter element and application of the carbon aerogel composite structure and the composite filter element

A carbon aerogel, composite structure technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., to achieve the effects of excellent adsorption performance, high purification efficiency, and high porosity

Pending Publication Date: 2021-11-26
BERKELEY NANJING MEDICAL RES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Traditional adsorption materials such as activated carbon, although the preparation process is simple and the cost is low, it is difficult to achieve comprehensive adsorption effects on different tobacco smoke pollutants. Therefore, the control of tobacco smoke, a multi-component mixed pollutant, requires a multi-component Adsorbent material for hierarchical selective adsorption

Method used

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  • Carbon aerogel composite structure, composite filter element, preparation methods of the carbon aerogel composite structure and the composite filter element and application of the carbon aerogel composite structure and the composite filter element
  • Carbon aerogel composite structure, composite filter element, preparation methods of the carbon aerogel composite structure and the composite filter element and application of the carbon aerogel composite structure and the composite filter element
  • Carbon aerogel composite structure, composite filter element, preparation methods of the carbon aerogel composite structure and the composite filter element and application of the carbon aerogel composite structure and the composite filter element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In this example, carbon aerogel, citric acid, urea, and pure water are used as raw materials to prepare a carbon aerogel composite structure. The specific steps are as follows:

[0045] (1) 0.1g of carbon aerogel, 1g of citric acid and 0.8g of urea are mixed and dissolved in 20g of pure water, stirred for 15min, and carbon aerogel, citric acid, and urea are evenly dispersed in pure water to obtain mixed solution;

[0046] (2) Heating the mixed solution in (1) at 160° C. for 8 h, and then cooling to room temperature to obtain the mixture;

[0047] (3) Centrifuge the mixture in (2) at a speed of 7000rpm for 25min, and remove the lower sediment after centrifugation;

[0048] (4) Wash the precipitate in (3) 4 times with pure water to remove impurities remaining on the precipitate;

[0049] (5) Freeze-dry the precipitate in (4) at -60°C for 24 hours to obtain a modified carbon aerogel;

[0050] (6) Pass the carbon aerogel in (5) through a 100-mesh sieve to obtain uniform ...

Embodiment 2

[0052] The macroporous, mesoporous and microporous carbon aerogels in Example 1 are in the range of mass ratio (0.5~6):(0.8~10):(1~15), for example: 5:8:10, 1:2:4, 1:3:3, 1:3:5, 1:4:2, 1:4:3, 2:2:3, 2:2:5, 2:3:2, 2: Mass ratios of 3:3, 2:3:4, 3:2:2, 4:7:8 or 6:10:15 are respectively fixed in the grid in the three-layer module frame from the outside and inside, respectively Carbon airgel composite structures with different mass ratios were obtained.

[0053] Further, as figure 2 As shown, the three-layer module frame equipped with carbon airgel is detachably installed in a composite filter element frame, and a HEPA filter is arranged at the front of the macroporous carbon airgel outer layer 1 of the three-layer module frame. Net 4, the thickness of the filter net is 5-8cm, and the composite filter element is obtained.

Embodiment 3

[0055] In order to explore the effect of the carbon airgel composite structure prepared by the method of the present invention to adsorb toluene vapor, this example selects any carbon airgel composite structure (excluding the module frame) prepared in Example 1, according to GBT12496. 5-1999 (refer to the wood activated carbon test method) method to test it. The specific plan is as follows:

[0056] (1) Weigh the obtained carbon airgel composite structure (excluding the module frame) with a mass of m (5g) as the adsorption material, add it to a quartz glass box dried to constant weight, and weigh the quartz glass with the adsorption material bin and record its mass as m 0 .

[0057] (2) Connect the quartz glass box equipped with adsorption material into the test device, keep the flow rate of the mixed gas containing toluene vapor at 1000±10mL / min, set the ambient temperature at 25±2°C, and start the test. At 0.5h, 1h, 2h, 3h, 4h after the start of the test, weigh the total ...

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Abstract

The invention discloses a carbon aerogel composite structure, which has a hierarchical porous structure from outside to inside, and is sequentially composed of a macroporous carbon aerogel outer layer, a mesoporous carbon aerogel middle layer and a microporous carbon aerogel inner layer. The mass ratio of the macroporous carbon aerogel to the mesoporous carbon aerogel to the microporous carbon aerogel is (0.5-6): (0.8-10): (1-15). The invention further discloses a composite filter element comprising the carbon aerogel composite structure, and application of the carbon aerogel composite structure and the composite filter element to removal of harmful gas in tobacco smoke, especially nicotine, formaldehyde and methylbenzene in second-hand smoke and third-hand smoke. The carbon aerogel composite structure provided by the invention has a multi-stage pore channel intercommunicated combined structure formed by macroporous, mesoporous and microporous materials, is reasonable and stable in structural design, can efficiently and selectively adsorb and remove harmful gases, especially nicotine, formaldehyde, toluene and the like, in tobacco smoke in a multi-layer manner, and has an important environmental protection effect and a good market application prospect.

Description

technical field [0001] The invention relates to the field of adsorption materials, in particular to a carbon airgel composite structure and a composite filter element, their preparation method and application. Background technique [0002] With the continuous development of industry, the continuous improvement of people's living standards and the popularization of household environmental protection awareness, people pay more and more attention to indoor air pollution. At present, the most serious and harmful indoor air pollution is second-hand smoke, also known as environmental tobacco smoke, which refers to the mixture of tobacco smoke (sidestream smoke) produced by the burning end of cigarettes or other tobacco products and exhaled by smokers. Nearly 1.3 billion people in the world are active smokers, who indirectly affect more non-smokers through second-hand smoke. There are more than 700 million victims of second-hand smoke in China alone. About 90% of lung cancer case...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30B01D53/02B01D46/10
CPCB01J20/20B01J20/28047B01J20/28069B01J20/28011B01D53/02B01D46/10B01D2257/708
Inventor 鲁昆昆潘徐伟沈军赵远杭渤
Owner BERKELEY NANJING MEDICAL RES CO LTD
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