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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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there is no preparation method of carbon-silicon composite adsorbent with cheap water glass as silicon source and superfine activated carbon powder as dopant

Method used

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  • Preparation method of carbon-silicon composite adsorbent
  • Preparation method of carbon-silicon composite adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Preparation of the 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, then add the ion exchange resin AmberliteIR120H + And 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, so that the mass percentage of activated carbon in the solution is 0.5wt%, stir for 1min and ultrasonically oscillate for 3min, then add ammonia water dropwise The solution was allowed to stand for 12 h until the pH of the solution was 7 to obtain a gel mixture.

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

[0023] (3) Drying treatment: the ob...

Embodiment 2

[0025] (1) Preparation of the 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, then add the ion exchange resin AmberliteIR120H + And 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, so that the mass percentage of activated carbon in the solution is 2wt%, stir for 1min and ultrasonically oscillate for 3min, then add ammonia water dropwise 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 was aged in isopropanol / n-hexane solution with a volume ratio of 1:1 at 60°C for 10 h, and then immersed in a volume ratio of 1:4: 5 in TMCS / isopropanol / n-hexane solution at 60°C for 24 hours to obtain a hydrophobic gel mixture.

[0027] (3) Drying treatment: the obtai...

Embodiment 3

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

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

[0031] (3) Drying treatment: the obtained hydrophobic gel mixture was placed in n-hexane solution for 12 hours, filtered, then the hydrophobic gel mixture was dried at normal temperature and pressure for 24 hours...

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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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