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Preparation method of formed carbon-based material

A carbon-based material and slurry technology, applied in the field of catalyst preparation, can solve problems such as application difficulties, and achieve the effects of improving mass transfer rate, simple method, and convenient manufacture

Inactive Publication Date: 2014-07-02
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing activated carbon adsorption materials will produce greater resistance under the requirements of high flow rate and high space velocity, which will easily lead to difficulties in application. The preparation method of forming carbon-based materials for forming materials can effectively reduce airflow resistance while increasing the space contact area of ​​activated carbon forming materials, and facilitate secondary development such as surface modification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for preparing a shaped carbon-based material is:

[0023] (1) Ball mill 50kg of powdered activated carbon or granular activated carbon until the median diameter is less than 50 microns, and the carbon content in the raw activated carbon is required to be not less than 85%.

[0024] (2) Mix the ball-milled activated carbon powder with 1kg of ferric nitrate, 1kg of aluminum silicate, 4kg of asphalt, and chitosan, heat 96kg of an aqueous solution containing 10% ethanol to 40°C, and prepare with the above-mentioned mixture A slurry with a solid content of 20%. Among the above materials, ferric nitrate is used as binder, aluminum silicate is used as binder and curing agent, asphalt is used as binder and carbonization agent, chitosan is used as surfactant, and its molecular weight is between 2000 and 6000.

[0025] (3) Heat the above materials to 60°C and stir for 1.5 hours to form a stable slurry with high solid content.

[0026] (4) An integral ...

Embodiment 2

[0029] A method for preparing a shaped carbon-based material is:

[0030] (1) Ball mill 90kg of powdered activated carbon or granular activated carbon until the median diameter is less than 50 microns, and the carbon content in the raw activated carbon is required to be not less than 85%.

[0031] (2) Mix the ball-milled activated carbon powder with 5kg of ferric nitrate, 5kg of aluminum silicate, 20kg of asphalt, 20 chitosan, etc., heat 140kg of an aqueous solution containing 30% ethanol to 60°C, and mix with the above-mentioned mixture Prepare a slurry with a solid content of 50%. Among the above materials, ferric nitrate is used as binder, aluminum silicate is used as binder and curing agent, asphalt is used as binder and carbonization agent, chitosan is used as surfactant, and its molecular weight is between 2000 and 6000.

[0032] (3) Heat the above materials to 80°C and stir for 2.5 hours to form a stable slurry with high solid content.

[0033] ...

Embodiment 3

[0036] A method for preparing a shaped carbon-based material is:

[0037] (1) Mill 70kg of powdered activated carbon or granular activated carbon until the median diameter is less than 50 microns, and the carbon content in the raw activated carbon is required to be not less than 85%.

[0038] (2) Mix the ball-milled activated carbon powder with ferric nitrate 3, aluminum silicate 3, asphalt 12, and chitosan 12, heat 185.7kg of an aqueous solution containing 20% ​​ethanol to 40-60°C, and mix with the above mixture The material is adjusted to a slurry with a solid content of 35%. Among the above materials, ferric nitrate is used as binder, aluminum silicate is used as binder and curing agent, asphalt is used as binder and carbonization agent, chitosan is used as surfactant, and its molecular weight is between 2000 and 6000.

[0039] (3) Heat the above materials to 60~80°C and stir for 2 hours to form a stable high solid content slurry.

[0040](4) An integral...

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Abstract

A method for preparing shaped carbon-based materials, which is characterized in that it includes the following steps: (1) ball-milling powdered activated carbon or granular activated carbon; (2) mixing the ball-milled activated carbon powder with iron nitrate, aluminum silicate, asphalt and chitosan Mix sugar; (3) Heat and stir the above slurry to form a stable slurry with high solid content; (4) Pour the slurry processed in step (3) on the top surface of the carrier, and move the carrier along the direction of the channel Place it vertically, or place it vertically according to the angle between the channel direction of the carrier and the vertical direction is not greater than 30 degrees; then make the carrier vibrate up and down, with a vibration frequency of 10 to 60Hz and an amplitude of 1 to 10mm. During the vibration process, the slurry acts under its own weight is quickly and evenly coated onto the carrier to form a slurry layer with a thickness of 0.5 to 5 mm; (5) After four heating and cooling drying treatments, the shaped carbon-based material of the present invention is obtained. The present invention can not only increase the spatial contact area of ​​activated carbon molding materials and effectively reduce air flow resistance, but is also conducive to secondary development such as surface modification.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of an activated carbon catalyst, in particular to a preparation method of a shaped carbon-based material. Background technique [0002] As we all know, carbon-based materials represented by activated carbon have the advantages of rich micropores, large specific surface area, many active sites, and large loading capacity of active components, and have extensive and important applications in adsorption materials and catalytic materials. [0003] The main sources of activated carbon are coal and biomass. The finished products are generally crushed granular activated carbon and columnar granular activated carbon. flow resistance. [0004] In the past, the application of activated carbon was mostly used for adsorption and purification of waste water, waste gas and other occasions. Due to the low flow rate, the activated carbon filling layer ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/08C01B32/30
Inventor 龚惠娟陈泽智余珉王梦秋樊杨梅马莎莎虞辉
Owner NANJING UNIV
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