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Method for preparing super active carbon based on coal doped hickory shell

A technology of hickory shell and hickory, which is applied in the field of preparation of coal-doped hickory shell-based super activated carbon, can solve problems such as potential safety hazards, potassium vapor running out, difficulty in achieving high volume specific capacity super activated carbon, etc., and achieve cost Saving and avoiding the effect of potassium vapor emission

Inactive Publication Date: 2009-11-18
周华江
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing coal-doped hickory shell-based super activated carbon, which mainly solves the problem in the prior art that it is difficult to achieve a high volume-specific capacity of super activated carbon using only one raw material as a carbon precursor The present invention also solves the problem of mixing coconut shells or walnut shells with solid potassium hydroxide for activation in a microwave oven. The microwave method is difficult to achieve industrialization, and the cost of KOH is high. Potassium vapor will come out after activation at 800 ° C, which is relatively safe. Technical problems such as hidden dangers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: the preparation method of a kind of coal-doped pecan shell-based super activated carbon of this example, its steps are:

[0025] a. Under inert gas protection conditions, the coarse particle coal is heated to 430°C at a heating rate of 5°C / min and stayed for 5h, and then heated to 600°C for carbonization for 2 hours; the carbonized coal and the carbonized hickory shell are separated Grinding on a micronizer to D 50 At about 300 mesh to 500 mesh, then mix evenly with a double cone dryer according to the mass ratio of pulverized coal powder and hickory nut shell powder at 1:1;

[0026] b. Mix the mixture with sodium hydroxide, i.e. NaOH, and ethanol in a ratio of 1:3, and add warm water equal to NaOH and ethanol with a water content of 5% to dissolve and soak for 24 hours;

[0027] c. Raise the above solid-liquid mixture to 320°C in a rotary kiln at a heating rate of 3°C / min, and stay there for 2 to 5 hours. At this stage, the speed of the rotary kiln is se...

Embodiment 2

[0031] Embodiment 2: the preparation method of a kind of coal-doped pecan shell-based super activated carbon of this example, its steps are:

[0032] a. Under inert gas protection conditions, the coarse particle coal was heated to 350°C at a heating rate of 5°C / min and stayed for 5 hours, and then heated to 500°C for 2 hours; the carbonized coal and the carbonized hickory shell Pulverize on a micro pulverizer to D 50 At about 300 mesh to 500 mesh, then mix evenly with a double cone dryer according to the mass ratio of pulverized coal powder and hickory nut shell powder at 5:1;

[0033] b. Mix the mixture with sodium hydroxide, namely NaOH, in a ratio of 1:2, add warm water equal to NaOH and ethanol with a water content of 5% to dissolve and soak for 24 hours;

[0034] c. Raise the above solid-liquid mixture to 320°C in a rotary kiln at a heating rate of 3°C / min, and stay there for 2 to 5 hours. At this stage, the speed of the rotary kiln is set at 2 rpm;

[0035] d. Continue...

Embodiment 3

[0038] Embodiment 3: the preparation method of a kind of coal-doped pecan shell-based super activated carbon of this example, its steps are:

[0039] a. Under inert gas protection conditions, the coarse particle coal was heated to 350°C at a heating rate of 5°C / min and stayed for 5 hours, and then heated to 500°C for 2 hours; the carbonized coal and the carbonized hickory shell Pulverize on a micro pulverizer to D 50 At about 300 mesh to 500 mesh, then mix evenly with a double cone dryer according to the mass ratio of pulverized coal powder and hickory nut shell powder at 3:1;

[0040] b. Mix the mixture with sodium hydroxide, i.e. NaOH, in a ratio of 1:5, and add warm water equal to NaOH and ethanol with a water content of 5% to dissolve and soak for 24 hours;

[0041] c. Raise the above solid-liquid mixture to 320°C in a rotary kiln at a heating rate of 3°C / min, and stay there for 2 to 5 hours. At this stage, the speed of the rotary kiln is set at 2 rpm;

[0042] d. Continue...

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Abstract

The invention relates to an activated carbon, in particular to a method for preparing coal-doped hickory shell-based super activated carbon. It mainly solves the problem in the prior art that it is difficult to achieve super activated carbon with a high volume specific capacity by using only one raw material as a carbon precursor; the invention also solves the problem of mixing coconut shell or walnut shell with solid potassium hydroxide Activation in a microwave oven, the microwave method is difficult to achieve industrialization, the cost of KOH is high, and potassium vapor escapes after activation at 800 ° C, which has technical problems such as major safety hazards. The preparation method of the present invention comprises the steps of: pulverizing the carbonized coal and hickory nut shells on a micro pulverizer, and then mixing the pulverized coal powder and hickory nut shell powder evenly according to the mass ratio; the mixture is mixed with NaOH and ethanol in proportion Mix evenly; heat up the above solid-liquid mixture in the activation furnace; heat up and stay for activation; the activated product is cooled, pickled with hydrochloric acid, rinsed with tap water, filtered, and dried.

Description

technical field [0001] The invention relates to an activated carbon, in particular to a method for preparing coal-doped hickory shell-based super activated carbon. Background technique [0002] At present, research on supercapacitors mainly focuses on carbon electrode materials, electrolytes, and structural design. Among them, carbon electrode materials are considered to be the key to improving capacitance performance, which determines the energy density, power density, and cycle performance of supercapacitors. Currently, carbon materials used as supercapacitor electrodes include super activated carbon, activated carbon fiber cloth, carbon aerogel, carbon nanotubes, etc. Supercapacitors using carbon aerogels and carbon nanotubes as electrodes have excellent capacitive performance, but due to the complicated preparation process and high cost, it is difficult to carry out large-scale production. Activated carbon fiber cloth needs to go through many steps such as spinning, wea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/08
Inventor 高凤仙
Owner 周华江