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A preparation method of soybean hull activated carbon and a comprehensive utilization method of soybean hulls

A technology of activated carbon and bean skin, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve problems such as multiple air pollutants and environmental pollution

Active Publication Date: 2022-01-28
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The optional raw materials include wood chips, charcoal, fruit shells and other plant materials. The physical activation method needs to use a large amount of gaseous activators to achieve the purpose of activating pores. After the gaseous activators react, more air pollutants will be produced, which will also cause a certain degree of pollution. environmental pollution

Method used

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  • A preparation method of soybean hull activated carbon and a comprehensive utilization method of soybean hulls
  • A preparation method of soybean hull activated carbon and a comprehensive utilization method of soybean hulls
  • A preparation method of soybean hull activated carbon and a comprehensive utilization method of soybean hulls

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Experimental program
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Effect test

Embodiment 1

[0043] The comprehensive utilization method of the bean curd of the present embodiment, utilizes above-mentioned gac generating device and gac cleaning device, comprises the following steps:

[0044] The first is the carbonization process of mung bean skins: put the dried mung bean skins into the reaction chamber 2, seal the reaction chamber 2 and the combustion furnace 1, close the intake switch valve 23, open the exhaust port switch valve, the drain port switch valve, Cooling water. The combustion furnace 1 is ignited for heating, and the heating rate is controlled at 20° C. / min. When the temperature reaches 80° C., open the intake switch valve 23 to feed nitrogen. Nitrogen gas flow rate is 100dm 3 / min (the volume of nitrogen at normal temperature and pressure). When the temperature rises to 830°C, stop raising the temperature and maintain the furnace temperature for 10 minutes to complete the carbonization process.

[0045] Then enter the activation stage: close the int...

Embodiment 2

[0052] The comprehensive utilization method of the bean curd of the present embodiment, utilizes above-mentioned gac generating device and gac cleaning device, comprises the following steps:

[0053] The first is the carbonization process of mung bean skins: put the dried mung bean skins into the reaction chamber 2, seal the reaction chamber 2 and the combustion furnace 1, close the intake switch valve 23, open the exhaust port switch valve, the drain port switch valve, Cooling water. The combustion furnace 1 is ignited for heating, and the heating rate is controlled at 15° C. / min. When the temperature reaches 75° C., open the intake switch valve 23 to feed nitrogen. Nitrogen gas flow rate is 100dm 3 / min (the volume of nitrogen at normal temperature and pressure). When the temperature rises to 800°C, stop raising the temperature and maintain the furnace temperature for 30 minutes to complete the carbonization process.

[0054] Then enter the activation stage: close the int...

Embodiment 3

[0061] The comprehensive utilization method of the bean curd of the present embodiment, utilizes above-mentioned gac generating device and gac cleaning device, comprises the following steps:

[0062] The first is the carbonization process of mung bean skins: put the dried mung bean skins into the reaction chamber 2, seal the reaction chamber 2 and the combustion furnace 1, close the intake switch valve 23, open the exhaust port switch valve, the drain port switch valve, Cooling water. The combustion furnace 1 is ignited for heating, and the heating rate is controlled at 25° C. / min. When the temperature reaches 70° C., the intake switch valve 23 is opened to feed nitrogen. Nitrogen gas flow rate is 120dm 3 / min (the volume of nitrogen at normal temperature and pressure). When the temperature rises to 780°C, stop raising the temperature and maintain the furnace temperature for 40 minutes to complete the carbonization process.

[0063] Then enter the activation stage: close th...

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Abstract

The invention belongs to the field of preparation of activated carbon, and in particular relates to a method for preparing activated carbon from soybean hulls and a method for comprehensive utilization of soybean hulls. The preparation method of the soybean hull activated carbon comprises the following steps: under a protective atmosphere, the soybean hulls are carbonized at 780-950° C., then self-activated at 900-1000° C. and without an exogenous activator, and then washed, dry. Compared with the existing physical activation method and chemical activation method, the preparation method of the soybean hull activated carbon has greatly improved the environmental protection of the process, the production cost is low, and the quality of the obtained activated carbon is excellent.

Description

technical field [0001] The invention belongs to the field of preparation of activated carbon, and in particular relates to a method for preparing activated carbon from soybean hulls and a method for comprehensive utilization of soybean hulls. Background technique [0002] Activated carbon is a porous artificial carbon adsorbent, which has a very wide range of uses in people's production and life. Traditional activated carbon production uses coal or wood as the main raw material for production. [0003] The traditional production of activated carbon mainly includes chemical activation and physical activation. The chemical activation method is to embed chemical reagents into the internal structure of carbon particles and undergo a series of cross-linking and polycondensation reactions to form micropores. The chemical activation method is divided into ZnCl according to the different activators 2 method, KOH method, H 3 PO 4 Law. For specific activation, the activator aque...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/324C10L3/08
CPCC01B32/324C10L3/08
Inventor 焦昆鹏罗磊段雪莹马丽苹易军鹏杜琳向进乐张晓宇樊金玲
Owner HENAN UNIV OF SCI & TECH