Method for preparing carbon nanometer tubes through waste plastic catalytic pyrolysis by two-section process

A technology of carbon nanotubes and waste plastics, applied in the field of carbon nanotubes, can solve the problems of strict process requirements and complicated operation, and achieve the effect of simple operation and convenient mechanical separation

Inactive Publication Date: 2018-04-20
武汉光谷环保科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this preparation method is that the process requirements are strict and the operation is more complicated.

Method used

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  • Method for preparing carbon nanometer tubes through waste plastic catalytic pyrolysis by two-section process
  • Method for preparing carbon nanometer tubes through waste plastic catalytic pyrolysis by two-section process
  • Method for preparing carbon nanometer tubes through waste plastic catalytic pyrolysis by two-section process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Take 4 grams of waste plastic (the material is PE) and wash it with ethanol and water for several times, then air-dry it naturally, and then crush it with a pulverizer to obtain a plastic solid with a particle size of less than 1cm; vacuumize the reaction furnace, and then pass the plastic solid through a screw-feeding way into the pyrolysis furnace, while the loading of 1 gram in the catalytic reaction furnace is a 4% iron-based catalyst (the carrier is SiO 2 , iron oxide is iron oxide), and at the same time turn on the thermocouples in the pyrolysis furnace and the catalytic reaction furnace to heat them respectively, and control the reaction temperature of the pyrolysis furnace to be about 350°C, so that the plastic solid slowly generates pyrolysis gas, Control the reaction temperature of the catalytic reactor to about 500°C, and react for about 3 hours; the pyrolysis gas is catalyzed in the catalytic reactor to obtain carbon nanotubes and hydrogen, wherein the carbon...

Embodiment 2

[0043] Take 4 grams of waste plastic (the material is PP) and wash it with ethanol and water for several times, then air-dry it naturally, and then crush it with a pulverizer to obtain a plastic solid with a particle size of less than 1cm; vacuumize the reaction furnace, and then pass the plastic solid through a screw-feeding way into the pyrolysis furnace, while loading 1 gram of loading in the catalytic reaction furnace is a 6% iron-based catalyst (the carrier is SiO 2, the iron oxide is ferroferric oxide), and at the same time turn on the thermocouples in the pyrolysis furnace and the catalytic reaction furnace to heat them respectively, and control the reaction temperature of the pyrolysis furnace to be about 420°C, so that the plastic solids are slowly generated and pyrolyzed Gas, control the reaction temperature of the catalytic reaction furnace to about 650°C, and react for about 3 hours. The pyrolysis furnace and the catalytic reaction furnace are heated at the same tim...

Embodiment 3

[0046] Take 6 grams of waste plastic (made of PPS) with ethanol and water for several times, then air-dry naturally, and then use a pulverizer to pulverize to obtain plastic solids with a particle size of less than 1cm; vacuumize the reaction furnace, and then pass the plastic solids through a screw-feeding way into the pyrolysis furnace, while the loading of 1 gram in the catalytic reaction furnace is 4% iron-based catalyst (carrier is Al 2 o 3 , the iron oxide is ferroferric oxide), and at the same time turn on the thermocouples in the pyrolysis furnace and the catalytic reaction furnace to heat them respectively, and control the reaction temperature of the pyrolysis furnace to be about 500°C, so that the plastic solids are slowly generated and pyrolyzed Gas, control the reaction temperature of the catalytic reactor to about 700°C, and react for about 2 hours. The pyrolysis gas is catalyzed in the catalytic reactor to obtain carbon nanotubes and hydrogen. Among them, the car...

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Abstract

The invention discloses a method for preparing carbon nanometer tubes through waste plastic catalytic pyrolysis by a two-section process, and belongs to the technical field of carbon nanometer tubes.The method is characterized in that thermolysis gas is generated in an upper layer thermolysis furnace through thermolysis reaction of waste plastics; the thermolysis gas enters a catalytic reaction furnace containing catalysts arranged at the lower layer and is decomposed to form hydrogen gas and the carbon nanometer tubes; the carbon nanometer tubes uniformly grow on the surface of the catalysts; the acting force between the carbon nanometer tubes and the catalysts is weak; the separation is convenient. The preparation method is simple; the obtained carbon nanometer tubes are in hollow fibershapes; the shapes are good.

Description

technical field [0001] The invention relates to preparing carbon nanotubes from plastics, and belongs to the technical field of carbon nanotubes, in particular to a method for preparing carbon nanotubes by catalytically cracking waste plastics in a two-stage method. Background technique [0002] Carbon nanomaterials refer to materials with at least one dimension of the dispersed phase smaller than 100nm. The reported carbon nanomaterials include carbon nanofibers, graphene, nanocarbon spheres, etc., and carbon nanotubes are recognized as the thinnest fibers in the world. ; These materials play an important role in the field of renewable energy conversion technologies such as electrochemical catalysis and energy storage due to their good electrical conductivity, high mechanical properties, and high specific surface area. [0003] At present, the common preparation methods of carbon nanotubes mainly include arc discharge method, laser ablation method, chemical vapor deposition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/162
CPCC01B2204/32
Inventor 韩哲楠沈伯雄田路泞吴春飞陈玺刘威赵清华张如宾
Owner 武汉光谷环保科技股份有限公司
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