Preparation method of carbon-silicon composite adsorbent

A composite adsorption and mixture technology, applied in chemical instruments and methods, gas treatment, membrane technology, etc., can solve problems that have not yet been seen, and achieve the effects of reducing time consumption, cheap sources, and large adsorption capacity

Inactive Publication Date: 2016-06-22
CHANGZHOU UNIV +1
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  • Abstract
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  • Claims
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Problems solved by technology

But there is no preparation method of carbon-silicon composite adsorbent with ch

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  • Preparation method of carbon-silicon composite adsorbent

Examples

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Example Embodiment

[0020] Example 1:

[0021] (1) Preparation of gel mixture: first add deionized water to 10mL of water glass to dilute, the volume ratio of water glass to deionized water is 1:4, and then add ion exchange resin AmberliteIR120H + Stir until the solution pH=2, continue to stir for 10h, filter to obtain the filtrate, then add an appropriate amount of 200 mesh powdered activated carbon to make the activated carbon accounted for 0.5wt% of the solution, stir for 1 min and ultrasonically shake for 3 min, then add ammonia water dropwise Until the solution pH=7, let it stand for 12 hours to obtain a gel mixture.

[0022] (2) Solvent replacement and hydrophobic modification: The obtained gel mixture is placed in a 1:1 isopropanol / n-hexane solution and aged at 60°C for 10 hours, and then immersed in a 1:4 volume ratio: 5 TMCS / isopropanol / n-hexane solution was aged at 60°C for 24 hours to obtain a hydrophobic gel mixture.

[0023] (3) Drying treatment: place the obtained hydrophobic gel mixture ...

Example Embodiment

[0024] Example 2:

[0025] (1) Preparation of the gel mixture: first add deionized water to 10mL of water glass for dilution, the volume ratio of water glass to deionized water is 1:4, and then add ion exchange resin AmberliteIR120H + And stir until the solution pH=2, continue to stir for 10h, filter to obtain the filtrate, and then add an appropriate amount of 200 mesh powdered activated carbon to make the mass percentage of the activated carbon in the solution 2wt%, stir for 1min and ultrasonic vibration treatment for 3min, then drop ammonia until The pH of the solution was 7, and it was allowed to stand for 12 hours to obtain a gel mixture.

[0026] (2) Solvent replacement and hydrophobic modification: The obtained gel mixture is placed in a 1:1 isopropanol / n-hexane solution and aged at 60°C for 10 hours, and then immersed in a 1:4 volume ratio: 5 TMCS / isopropanol / n-hexane solution was aged at 60°C for 24 hours to obtain a hydrophobic gel mixture.

[0027] (3) Drying treatment: P...

Example Embodiment

[0028] Example 3:

[0029] (1) Preparation of gel mixture: first add deionized water to 10mL of water glass to dilute, the volume ratio of water glass to deionized water is 1:4, and then add ion exchange resin AmberliteIR120H + And stir until the solution pH=2, continue to stir for 10h, filter to obtain the filtrate, stir for 1min and ultrasonically shake for 3min, then add dropwise ammonia until the solution pH=7, stand for 12h to obtain a gel mixture.

[0030] (2) Solvent replacement and hydrophobic modification: The obtained gel mixture is placed in a 1:1 isopropanol / n-hexane solution and aged at 60°C for 10 hours, and then immersed in a 1:4 volume ratio: 5 TMCS / isopropanol / n-hexane solution was aged at 60°C for 24 hours to obtain a hydrophobic gel mixture.

[0031] (3) Drying treatment: place the obtained hydrophobic gel mixture in a n-hexane solution for 12 hours, filter, and then dry the hydrophobic gel mixture at room temperature and pressure for 24 hours, and then follow the ...

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Abstract

The invention particularly relates to a preparation method of a carbon-silicon composite adsorbent. Firstly, water glass is diluted with deionized water (the volume ratio of the water glass to the deionized water is 1:4), then strong acid ion exchange resin Amberlite IR120H<+> is added while stirring until the pH of the solution is 2, the solution is continuously stirred for 10 h, a filtrate is obtained after filtration, then a proper amount of powdery activated carbon of 200-500 meshes is added, so that the activated carbon accounts for 0.1wt%-2.1wt% of the solution in percentage by mass, the solution is stirred for 1 min and subjected to ultrasonic oscillation for 3 min, a certain quantity of ammonia water solution is dropwisely added, the solution is stirred until the pH of the solution is 7, the solution is left to stand for 12 h and then placed in an isopropyl/n-hexane solution for aging at 60 DEG C for 5-10 h, then a gel mixture is immersed in an isopropyl/n-hexane/TMCS (trimethylchlorosilane) solution for 24 h and then placed in an n-hexane solution for 12 h, filtration is performed, then the hydrophobic gel mixture is dried at the normal temperature and under the normal pressure for 24 h and finally continuously dried at 60 DEG C, 120 DEG C and 150 DEG C for 2 h respectively, and the carbon-silicon composite adsorbent is obtained.

Description

technical field [0001] The invention belongs to the technical field of organic waste gas pollution control, and in particular relates to a preparation method of a carbon-silicon composite adsorbent. Background technique [0002] Petroleum and its products are a mixture of various hydrocarbons, which contain a large amount of volatile organic components (VOCs). These light components are extremely volatile and bring many hazards. Recycling it not only protects the environment but also saves energy. Among the commonly used recovery methods, the adsorption method is a relatively mature method. It has the advantages of high adsorption and separation efficiency, low energy consumption, easy industrialization and removal of trace substances. It is usually used as VOCs deep purification or concentration emission terminal control means. In the adsorption method, the performance of the adsorbent is the key factor affecting the adsorption effect. Factors such as the specific surface...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30B01D53/04
CPCB01J20/26B01D53/04B01D2257/708
Inventor 黄维秋谭小兵吕爱华张炳权王翊红徐先阳曹芮周旭红许继星
Owner CHANGZHOU UNIV
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