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A method of extruding activated carbon materials using a reactive twin-screw extrusion system

A twin-screw extrusion and reactive technology, applied in the field of porous materials, can solve the problems of incapable of continuous production and preparation process efficiency, limitation of mass transfer and heat transfer process of activated carbon materials, etc. hole effect

Active Publication Date: 2021-08-31
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the above analysis, the embodiment of the present invention aims to provide a method for extruding activated carbon materials using a reactive twin-screw extrusion system to solve the problem that the mass and heat transfer processes of existing activated carbon materials are limited and unable to Continuous production and technical problems of low efficiency in the preparation process

Method used

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  • A method of extruding activated carbon materials using a reactive twin-screw extrusion system
  • A method of extruding activated carbon materials using a reactive twin-screw extrusion system
  • A method of extruding activated carbon materials using a reactive twin-screw extrusion system

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Effect test

Embodiment 1

[0069] 100 g of pre-carbonized carbon material raw materials (the types of carbon material raw materials are listed in Table 1) and 300 g of KOH powder were stirred and mixed evenly, and the screw-in speed of the reactive twin-screw extrusion system was 20 r / min. The flow rate of the reactive twin-screw extrusion system is 0.4kg / h. The axial distance of the reactive twin-screw extrusion system is 26mm, the diameter of the screw shaft is 31mm, and the total length of the screw shaft is 12000mm; the reactive twin-screw extrusion system has three functional areas along the axial direction: the propulsion area with a temperature of 400°C 5, The kneading zone 6 with a temperature of 600°C and the high-temperature distribution mixing zone 7 with a temperature of 800°C; the cooled sample is mixed and eluted three times with 2.0kg deionized water, and the treatment time in ultrasonic cleaning is 20 minutes each time, and the solid Samples were filtered and dried. The porosity propert...

Embodiment 2

[0073] 100 g of pre-carbonized carbon material raw materials (the types of carbon material raw materials are listed in Table 2) and 300 g of NaOH powder were stirred and mixed evenly, and the screw-in speed of the reactive twin-screw extrusion system was 20 r / min. The flow rate of the reactive twin-screw extrusion system is 0.4kg / h. The axial distance of the reactive twin-screw extrusion system is 26mm, the diameter of the screw shaft is 31mm, and the total length of the screw shaft is 12000mm; the reactive twin-screw extrusion system has three functional areas along the axial direction: the propulsion area with a temperature of 400°C 5, The kneading zone 6 with a temperature of 600°C and the high-temperature distribution mixing zone 7 with a temperature of 800°C; the cooled sample is mixed and eluted three times with 2.0kg deionized water, and the treatment time in ultrasonic cleaning is 20 minutes each time, and the solid Samples were filtered and dried. The porosity proper...

Embodiment 3

[0077] 100g of pre-carbonized carbon material raw materials (the types of carbon material raw materials are listed in Table 3) and 300g of NaOH / KOH (1:1) powder were stirred and mixed evenly, and the screw-in speed of the reactive twin-screw extrusion system was 20r / min. The flow rate of the reactive twin-screw extrusion system is 0.4kg / h. The axial distance of the reactive twin-screw extrusion system is 26mm, the diameter of the screw shaft is 31mm, and the total length of the screw shaft is 12000mm; the reactive twin-screw extrusion system has three functional areas along the axial direction: the propulsion area with a temperature of 400°C 5, The kneading zone 6 with a temperature of 600°C and the high-temperature distribution mixing zone 7 with a temperature of 800°C; the cooled sample is mixed and eluted three times with 2.0kg deionized water, and the treatment time in ultrasonic cleaning is 20 minutes each time, and the solid Samples were filtered and dried. The porosity...

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Abstract

The invention relates to a method for extruding an activated carbon material by using a reactive twin-screw extrusion system, which belongs to the technical field of porous materials, and solves the problem that the mass transfer and heat transfer process of the existing activated carbon material is limited during preparation, and cannot be continuously produced. Technical problem of low efficiency of the preparation process. The method of the present invention comprises the following steps: step 1, mixing the carbon material raw material with an alkali metal hydroxide to obtain a pretreated carbon material; step 2, injecting the pretreated carbon material into a reactive twin-screw extrusion system; step 3, utilizing Reactive twin-screw extrusion system processes the molten mixture of alkali metal hydroxide and carbon material raw materials; step 4, cooling the solid obtained in step 3 in nitrogen, impregnating excess alkali metal hydroxide with deionized water, Activated carbon material is obtained after filtering and drying. The invention is applicable to various carbon material raw materials such as petroleum coke, coal, multi-wall carbon nanotubes, nano carbon black and biomass-based carbonized materials.

Description

technical field [0001] The invention relates to the technical field of porous materials, in particular to a method for extruding activated carbon materials using a reactive twin-screw extrusion system. Background technique [0002] Among the general methods for activating carbon materials to create pores, the materials obtained by activation with sodium hydroxide or potassium hydroxide have a large specific surface area and relatively excellent performance in all aspects, but due to their high cost, salt corrosion and a large number of uncontrollable factors in the process, this The industrial application of the activation process is less, but it has a relatively limited application in the production of carbon materials for supercapacitors. [0003] A. Linares-Solano et al. made a detailed summary of the progress of hydroxide-activated carbon materials (Chemistry and Physic of Carbon Vol.30, 2008, p1-62.). The main mechanism of pore formation activated by sodium hydroxide o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/348
CPCC01B32/348
Inventor 李峰波袁国卿宋延林
Owner INST OF CHEM CHINESE ACAD OF SCI
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