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Three-dimensional cross-network hierarchical pore structure carbon-based porous material and its preparation method and application

A porous material, carbon-based technology, which is applied to the three-dimensional networked hierarchical pore structure carbon-based porous material and its preparation and application fields, can solve the problems of difficult vacuum desorption, poor hydrophobicity, and high adsorption heat of activated carbon, and achieves Wide range of industrial applications, good hydrophobicity, and the effect of reducing the desorption temperature

Active Publication Date: 2020-01-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a hydrophobic carbon-based porous material with low heat of adsorption and low difficulty of vacuum desorption in view of the problems of existing activated carbon such as high heat of adsorption, difficulty in vacuum desorption, and poor hydrophobicity. Its large-scale preparation method

Method used

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  • Three-dimensional cross-network hierarchical pore structure carbon-based porous material and its preparation method and application
  • Three-dimensional cross-network hierarchical pore structure carbon-based porous material and its preparation method and application
  • Three-dimensional cross-network hierarchical pore structure carbon-based porous material and its preparation method and application

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preparation example Construction

[0022] The preparation method of carbon-based porous material provided according to the present invention comprises the following steps:

[0023] (A) carry out fermentation after charcoal powder is mixed with leavening agent and water;

[0024] (B) cross-linking and solidifying after mixing the product obtained by fermentation with water and binder;

[0025] (C) molding and drying the product obtained by cross-linking and curing;

[0026] (D) carbonizing and activating the dried product.

[0027] In the present invention, the charcoal powder is preferably porous plant charcoal powder rich in natural fibers, and more preferably one or more of coconut shell charcoal powder, wood charcoal powder, bamboo charcoal powder, lotus root charcoal powder, and straw charcoal powder.

[0028] According to the present invention, the starter and water are used to form a fermentation environment, so the starter can be various organic matter, preferably starch, more preferably mung bean star...

Embodiment approach

[0030] According to a preferred embodiment of the present invention, the amount of the leavening agent is 5 to 20% by weight of the carbon powder, preferably 8 to 18% by weight, and the amount of water is 1 to 3 times the weight of the organic matter and the carbon powder, preferably 1.5 to 2.8 times.

[0031] In the present invention, the fermentation conditions include a temperature of 10-40° C., a time of 1-4 months, preferably 1-2 months, and an oxygen content of <10% by volume.

[0032] Fermentation can be carried out in fermenters, usually under closed conditions. The fermentation process generally does not require special deoxygenation and oxygenation operations on the fermenter to achieve an oxygen content of <10% by volume.

[0033] According to the present invention, in step (B), the weight ratio of the fermented product to the binder and water is preferably 100:5-20:10-35, more preferably 100:8-18:15-25. Too low or too high binder content will adversely affect the...

Embodiment 1

[0082] (1) Weigh 1000kg 600 mesh coconut shell charcoal powder (obtained by carbonizing coconut shell, specific surface area is 488m 2 / g, the mesopore content is 48%, the micropore content is 51%), add 80kg of wheat starch and 2000kg of water while stirring, after stirring to form a slurry, place it in the raw material tank, and seal it in a room temperature environment of 20°C Ferment for 2 months, wherein the oxygen content in the raw material tank is less than 10% by volume.

[0083] (2) Weigh 500kg of fermented coconut shell charcoal powder, add 80kg of water and 50kg of petroleum pitch (purchased from Qilu Petrochemical Company, brand 10#) as a binder while stirring, maintain the fermentation temperature at 60°C, and continue stirring for 45 After 10 minutes, enter the layering machine layering molding (pressure is 10MPa, layering speed is 5cm / s), obtains the cylindrical strip that diameter is 5mm, and length is 1cm.

[0084] (3) Put the cylindrical strip obtained in st...

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Abstract

The invention provides a carbon-based porous material and its preparation method and application. The preparation method of the carbon-based porous material includes the following steps: (A) Mixing carbon powder, starter and water evenly and then fermenting; (B) Mixing the fermentation product with water and a binder and then cross-linking and solidifying; (C) Shape and dry the product obtained by cross-linking and solidification; (D) Carbonize and activate the dried product. The surface of the carbon-based porous material provided by the invention has a penetrating hierarchical pore structure, with macropores inside mesopores and mesopores inside micropores. The mesopore content is high, which shortens the diffusion distance of organic gas molecules during the adsorption process. At the same time, It can also accelerate the adsorption and desorption rate and reduce the desorption temperature. It can also help solve the problem of desorption and recovery of organic gas molecules. The new carbon-based porous material prepared by the present invention is a low-cost, high-performance product, which is particularly suitable for oil and gas recovery, water treatment, catalyst carrier and other fields, and has good industrial application prospects and high socio-economic value.

Description

technical field [0001] The invention relates to a carbon-based porous material with a three-dimensional cross-network hierarchical pore structure, a preparation method and an application thereof. Background technique [0002] Carbon-based porous materials have a wide range of applications, such as being widely used as adsorbents and catalyst supports in industry. [0003] The volatilization loss and even leakage of refined oil are inevitable in many links of storage and transportation. Adsorption oil and gas recovery technology is currently the oil and gas recovery technology with the highest technical maturity, the widest application range, the lowest energy consumption and the best recovery effect. Adsorbents with good selectivity and high separation ratio can reduce the size of equipment and reduce investment costs. Porous activated carbon has great advantages in adsorption because of its rich microporous structure, but in the actual operation of VOCs pollution control,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J21/18B01J35/10B01D53/02C01B32/324C01B32/336
CPCB01D53/02B01J20/20B01J20/28011B01J20/28078B01J20/28095B01J21/18C01P2004/03C01P2004/04C01P2006/12C01P2006/17B01D2257/7022B01J35/617B01J35/643B01J35/647
Inventor 赵宇鑫牟善军姜春明刘全桢张卫华王林张树才牟小冬
Owner CHINA PETROLEUM & CHEM CORP
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