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The method for preparing activated carbon by using the husk of Camellia oleifera and the activated carbon and its application

A technology for preparing activated carbon and camellia oleifera, which is applied to the removal of solid waste and the electrodes of hybrid capacitors, can solve problems such as high cost, serious environmental pollution, and low product quality, and achieve the effects of reducing concentration, protecting the environment, and reducing production costs

Active Publication Date: 2016-08-17
CHANGSHA GUORONG NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These technologies use high-concentration acid or high alkali-carbon ratio, all of which belong to the traditional activated carbon preparation process, which has problems such as high cost, serious environmental pollution, and low product quality.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The method for preparing activated carbon by utilizing the husk of Camellia oleifera provided by the present embodiment comprises the following steps:

[0030] a. Dry the husk of Camellia oleifera at 250°C, crush it to a certain particle size, and pass it through a 20-mesh sieve for later use.

[0031] b. Soak 20-mesh Camellia oleifera shell powder and 2% KOH in a mass ratio of 1:4 at a temperature of 70°C for 24 hours.

[0032] c. The soaked Camellia oleifera husk powder is activated once by microwave, the temperature of the first activation is 200° C., and the time is 2 hours.

[0033] d. Carbonize the once-activated Camellia oleifera husk powder in a carbonization furnace at a temperature of 700°C for 2 hours; then pulverize it with a pair of rollers, and then further pulverize it with a ball mill to obtain carbon powder with a particle size range of 4-7 µm .

[0034] e. The above-mentioned carbon powder is deashed by microwave heating with 0.5% hydrochloric acid a...

Embodiment 2

[0038] The method for preparing activated carbon by utilizing the husk of Camellia oleifera provided by the present embodiment comprises the following steps:

[0039] a. Dry the husk of Camellia oleifera at 250°C, crush it to a certain particle size, and pass it through a 50-mesh sieve for later use.

[0040] b. Soak 50 mesh of Camellia oleifera shell powder and 3% KOH in a mass ratio of 1:1 at a temperature of 90°C for 7 hours.

[0041] c. The soaked Camellia oleifera shell powder is activated once by microwave, the temperature of the first activation is 450°C, and the time is 0.5h.

[0042] d. The once-activated Xiang oleifera shell powder is carbonized in a carbonization furnace at a temperature of 900°C for 0.5 h; then crushed by a double-roller machine and further crushed by a ball mill to obtain charcoal with a particle size range of 4-8 µm pink.

[0043] e. The above-mentioned charcoal powder is deashed by microwave heating with 2% hydrochloric acid at a temperature o...

Embodiment 3

[0047] The method for preparing activated carbon by utilizing the husk of Camellia oleifera provided by the present embodiment comprises the following steps:

[0048] a. Dry the husk of Camellia oleifera at 250°C, crush it to a certain particle size, and pass it through a 100-mesh sieve for later use.

[0049] b. Impregnate 100 mesh of Camellia oleifera shell powder and 5% KOH in a mass ratio of 1:2 at a temperature of 80°C for 18 hours.

[0050] c. The soaked Camellia oleifera husk powder is activated once by microwave, the temperature of the first activation is 200° C., and the time is 1 h.

[0051] d. Carbonize the primary activated raw material in a carbonization furnace at a temperature of 700°C for 1.5 hours; then pulverize it with a double roller mill, and then further pulverize it with a ball mill to obtain carbon powder with a particle size range of 4~7µm.

[0052] e. The above-mentioned carbon powder is deashed by microwave heating with 0.5% hydrochloric acid at a t...

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Abstract

The invention relates to a method for preparing activated carbon by using the husk of camellia oleifera, the activated carbon and its application, and belongs to the field of biochemical industry. The method comprises the following steps: drying, crushing and sieving the Camellia oleifera shell powder; impregnating the Camellia oleifera shell powder with alkali solution; activating the Camellia oleifera shell powder soaked by microwave once, and the temperature of the primary activation is 200~450℃, the time is 0.5~2h; carbonize the Xiang oleifera husk powder after one activation, and pulverize it to get charcoal powder; add a strong acid solution to the charcoal powder, and heat it with microwave to remove ash. The temperature of ash removal is 200~450℃, the time is 0.5~1h, after ash removal, wash the carbon powder with water to neutrality; add 1~5 times the mass of water to the washed carbon powder, and use microwave for secondary activation until dry to obtain activated carbon , the secondary activation temperature is 200~450°C. The activated carbon prepared by this method is suitable for supercapacitors.

Description

technical field [0001] The invention relates to a method for preparing activated carbon by using the husk of camellia oleifera, the activated carbon and its application, and belongs to the field of biochemical industry. Background technique [0002] Energy and environmental issues are important issues facing the world, and they are becoming more and more serious, forcing countries to find new energy sources and new energy conversion and storage methods. As a way of energy storage and conversion, supercapacitors are widely used in electronic products (tuning machine, computer storage) due to their advantages of fast charging rate, high power, and long life, and have also begun to be used in electric vehicles, cranes, subways, etc. Replenishment and recycling, etc. Activated carbon is the earliest electrode material used in supercapacitors, and it is also the only carbon material for commercial double-layer capacitors. The performance and price of activated carbon have becom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/12B09B3/00H01G11/44
CPCY02E60/13
Inventor 谢镕安刘登友李志光周智董新荣林忠富王国庆宋云峰况皓吴丽君
Owner CHANGSHA GUORONG NEW ENERGY
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