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A kind of alumina-activated carbon composite material and preparation method thereof

A composite material and alumina technology, which is applied in the field of alumina-activated carbon composite materials and its preparation, can solve problems such as poor hydrothermal stability, and achieve the effects of easy operation, low price, and low requirements for preparation equipment

Active Publication Date: 2021-08-27
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides an alumina-activated carbon composite material and a preparation method thereof, which can organically combine the advantages of microporous materials and mesoporous materials, and make the microporous structure of activated carbon Complementing the advantages of the mesoporous structure of alumina, improving the overall physical and chemical properties of the composite material, not only can efficiently adsorb macromolecular organic matter, broaden the types of organic matter removed, but also overcome the shortcomings of poor hydrothermal stability of mesoporous materials

Method used

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  • A kind of alumina-activated carbon composite material and preparation method thereof

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preparation example Construction

[0020] A kind of alumina-activated carbon composite material, its preparation method can comprise the following steps:

[0021] Step A, slowly add polyethylene glycol as a template agent to the aluminum nitrate aqueous solution at a rate of 5 mL / min, and stir until the polyethylene glycol is completely dissolved, then add ammonia water to adjust the pH value of the solution to 9, thereby obtaining Aluminum sol.

[0022] Step B, according to the ratio of the mass ratio of the aluminum hydroxide sol to the activated carbon powder being 1:2, add activated carbon powder to the aluminum hydroxide sol, stir for 1 hour, and then perform centrifugation to obtain a reaction precursor gel.

[0023] Step C, soak the reaction precursor gel in the ethanol and water mixture (in the ethanol and water mixture, the volume ratio of ethanol to water can be 1:1, and the ethanol can be dehydrated alcohol with a mass fraction of 99.7% ) for 24 hours, then remove the supernatant, and dry it at 110...

Embodiment 1

[0030] Such as figure 1 Shown, a kind of alumina-activated carbon composite material, its preparation method can comprise the following steps:

[0031] Step a, according to the mass ratio of aluminum nitrate and polyethylene glycol is 1:1, slowly add polyethylene glycol (PEG-2000) as a templating agent to the aluminum nitrate aqueous solution, and stir until the polyethylene glycol is completely dissolving, and then adding ammonia water with a mass concentration of 25% to adjust the pH value of the solution to 9, thereby obtaining aluminum hydroxide sol.

[0032] Step b, according to the ratio of the mass ratio of the aluminum hydroxide sol to the activated carbon powder being 1:2, add activated carbon powder to the aluminum hydroxide sol, stir for 1 hour, and then perform centrifugation to obtain a reaction precursor gel.

[0033] Step c, soak the reaction precursor gel in the mixture of ethanol and water (in the mixture of ethanol and water, the volume ratio of ethanol to ...

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Abstract

The invention discloses an alumina-activated carbon composite material and a preparation method thereof. Activated carbon powder is added to the aluminum hydroxide sol, stirred for 1 hour, and then centrifuged to prepare a reaction precursor gel; The bulk gel was immersed in a mixture of ethanol and water for 24 hours, and then dried to obtain a reaction precursor xerogel; the reaction precursor xerogel was calcined in air at a heating rate of 5 °C / min until it reached After 350 °C, it was changed to calcination under nitrogen protection, and the heating rate was 10 °C / min. After reaching 800 °C, constant temperature calcination was performed for 2 to 3 hours, and the alumina-activated carbon composite material was obtained. The invention can complement the advantages of the microporous structure of activated carbon and the mesoporous structure of alumina, not only can efficiently adsorb macromolecular organic matter, broaden the types of removed organic matter, but also overcome the disadvantage of poor hydrothermal stability of mesoporous materials.

Description

technical field [0001] The invention relates to the field of environmental engineering, in particular to an alumina-activated carbon composite material and a preparation method thereof. Background technique [0002] In the field of environmental engineering, adsorption method is widely used in oil and gas recovery. The advantages of the adsorption method are low operating cost, high purification efficiency, mature process and wide application range. The key to recovery of oil and gas by adsorption method is to select high-efficiency adsorbents, and high-efficiency adsorbents usually have the following characteristics: ① large specific surface area; ② good pore structure characteristics; ③ large adsorption capacity; ④ high desorption efficiency; ⑤ Easy to synthesize and regenerate. [0003] Microporous materials have the advantages of good adsorption performance and high hydrothermal stability, so they are widely used in the field of adsorption. Activated carbon is a very ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/02
CPCB01D53/02B01D2253/102B01D2253/104B01D2257/708B01J20/20B01J20/30
Inventor 朱玲王春雨赵飞杨玉洁
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY