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A kind of carbon nanomaterial macroscopic body, preparation method and adsorption and filtration particle performance

A carbon nanomaterial and macroscopic technology, which is applied in the fields of carbon nanomaterial macroscopic, preparation, adsorption and filtration of particle performance, can solve the problems of economic loss, difficulty, time-consuming and energy consumption, and achieves low gas consumption and high usage. The effect of long life and high dust holding capacity

Active Publication Date: 2019-02-22
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, a large number of literatures have reported that the method of extrusion is used to separate the oil adsorbed in carbon nanotube sponges and graphene sponges, which will lead to changes in the pore structure of the material and unsatisfactory recycling performance.
At the same time, in a closed environment, how to detect the volume change of carbon nanomaterials after oil absorption, and how to implement extrusion operations are very difficult
In addition, if scattered carbon nanomaterial powder is used, not only will it be taken away by a large amount of flowing liquid during use, causing huge economic losses
At the same time, if a large number of carbon nanomaterials are randomly piled up, the volume expansion will be too large, so that the bed pressure drop in the equipment will increase too fast, and the operation will be unstable.
And it makes the regeneration of the material after oil absorption (purge the adsorbed oil) very time-consuming and energy-consuming, which does not match the fast adsorption process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The stainless steel wire mesh is pressed and wrapped to make a macroscopic shell with an aspect ratio of 1000. The copper catalyst is supported on the surface of the macro body; the iron / alumina catalyst is loaded inside the macro body. Put it in the reactor, pass the process gas of methanol, xylene and nitrogen (the mass ratio is 1::0.5:0.1), the temperature is 600°C, the pressure is 0.1MPa, and the reaction time is 60 minutes. After the process gas is cracked, graphene is formed on the copper catalyst and carbon nanotubes on the iron / alumina catalyst.

[0029] The catalyst is removed by a conventional alkali treatment method, the mass fraction of the carbon nanomaterials on the inner wall of the macroscopic body is 0.1%, and the mass fraction of the carbon nanomaterials filled in the macroscopic body is 70%. The purity of carbon nanomaterials is 95%. The porosity of the macro body is 60%.

[0030] Packing the macrobody in a container can handle the gas containing p...

Embodiment 2

[0032] The ceramic powder is pressed to form a macroscopic body with an aspect ratio of 0.001. Calcium oxide is loaded on the inner surface of the macro body; nickel / activated carbon catalyst is filled inside the macro body. Put it in the reactor, feed the process gas of CO, diesel and nitrogen (mass ratio 1:1:5), the temperature is 1000°C, the pressure is 0.5MPa, and the reaction time is 50 minutes. After the process gas is cracked, graphene is generated on the magnesium oxide template and carbon nanotubes are generated on the nickel / activated carbon catalyst.

[0033] The catalyst is removed by a conventional acid treatment method, the mass fraction of the carbon nanomaterials on the inner wall of the macroscopic body is 1%, and the mass fraction of the carbon nanomaterials filled inside is 69%. Carbon nanomaterials are 95% pure. The porosity of the macro body is 65%.

[0034] The macroscopic body is filled in a container, which can treat wastewater containing particles a...

Embodiment 3

[0036] The carbon fiber cloth is woven to make a macroscopic body with an aspect ratio of 10. Cobalt is loaded on the surface of the inner body of the macroscopic body; molybdenum, platinum / aluminum silicate and silicon oxide are filled inside the macroscopic body. Put it in the reactor, pass through the process gas of acetylene, carbon 30 alcohol and nitrogen (mass ratio is 2:1:0.1), the temperature is 400°C, and the reaction time is 10 seconds. After the process gas is cracked, carbon nanotubes are formed on the cobalt surface, carbon nanotubes on the Pt / aluminosilicate, and graphene on the silicon oxide.

[0037] The catalyst is removed by a conventional acid-base treatment method, the mass fraction of the carbon nanomaterials on the inner wall of the macroscopic body is 0.5%, and the mass fraction of the carbon nanomaterials filled inside is 50% in the macroscopic body. Carbon nanomaterials are 95% pure. The porosity of the macro body is 91%.

[0038] The macroscopic bo...

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Abstract

The invention discloses a carbon nanomaterial macro body. The carbon nanomaterial macro body is characterized in that the macro body has three structures of a definite porous shell, an inner wall and an inside. The material of the porous shell is any one of carbon fiber, ceramic and metal. The inner wall of the macro body (namely the inner surface of the porous shell) has a carbon nanomaterial. The inside of the macro body is filled with the carbon nanomaterial. The porosity of the macro body reaches 60%-97%, and the ratio of the height to the diameter of the macro body is 0.001-1000. The invention further discloses a method for utilizing a chemical vapor deposition method to prepare the macro body. The macro body can be used for adsorbing organic matters in wastewater and filter particles or the organic matters in gases, and has the advantages of being long in service life, big in handling capacity and low in preparing cost.

Description

technical field [0001] The invention belongs to the technical field of carbon nanomaterials, and in particular relates to a carbon nanomaterial macrobody, a preparation method, and the performance of adsorbing and filtering particles. Background technique [0002] Carbon nanomaterials are a new type of material with large specific surface area, good chemical stability, and non-polar surface. Its representative products include carbon nanotubes, carbon nanofibers, graphene, and carbon nanoparticle. The above characteristics enable carbon nanomaterials to adsorb non-polar organic substances in gases or liquids, and to adhere to particles in gases or liquids. For example, materials such as carbon nanotubes and graphene can absorb organic matter 10-100 times their own weight, thus showing better performance than traditional activated carbon materials. In addition, it is also possible to adsorb non-polar organic substances in water based on the principle of polarity and non-pola...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30B01D53/02C02F1/28C02F101/30
CPCB01D53/02B01J20/20B01J20/205B01J20/28035C02F1/288C02F2101/30
Inventor 骞伟中陈航多尼杨周飞田佳瑞
Owner TSINGHUA UNIV
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