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Method for preparing semi-coke-based activated carbon through ball-milling-assisted organic fermentation technology

A technology of activated carbon and high-energy ball mill, applied in fermentation, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as environmental pollution, incomplete hole expansion, and low specific surface area

Pending Publication Date: 2021-09-10
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the activation methods of commercial activated carbon mainly include physical activation and chemical activation. Among them, water vapor, CO 2 The activation method used as the activation medium is called the physical activation method, but a single physical activation method is difficult to stimulate the carbon substrate on the surface of the semi-coke to react with the activation gas, resulting in problems such as incomplete hole expansion, low specific surface area, and poor quality; In addition, with the help of KOH, ZnCl 2 and H 3 PO 4 The method of chemical reagent-assisted activation is called chemical activation, but the activation process not only consumes a large amount of chemical reagents, but also causes great pollution to the environment.

Method used

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  • Method for preparing semi-coke-based activated carbon through ball-milling-assisted organic fermentation technology
  • Method for preparing semi-coke-based activated carbon through ball-milling-assisted organic fermentation technology
  • Method for preparing semi-coke-based activated carbon through ball-milling-assisted organic fermentation technology

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Experimental program
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Effect test

Embodiment 1

[0049] The method for preparing semi-coke-based activated carbon by ball milling assisted organic fermentation technology described in this embodiment comprises the following steps:

[0050] 1) Take 30g of block semi-coke, and then place it in a ball mill for ball milling for 4 hours to obtain powdery semi-coke;

[0051] 2) Dissolve 3g of starch and 0.3g of fermentation powder in 30mL of aqueous solution, stir evenly, then add 30g of semi-coke powder, ferment at 40°C, take samples after 14 days of fermentation, and then dry and seal them for storage;

[0052] 3) Take 5g of fermented semi-coke material for high-temperature activation treatment, wherein the control activation temperature is 800°C, the heating time is 90min, and the activation time is 120min. 2 As an activator, the air flow rate is 30mL / min. After activation, the obtained semi-coke-based activated carbon is vacuum-dried at 120°C, and then sealed and stored to obtain semi-coke-based activated carbon.

[0053] I...

Embodiment 2

[0058] The method for preparing semi-coke-based activated carbon by ball milling assisted organic fermentation technology described in this embodiment comprises the following steps:

[0059] 1) Put 30g of block semi-coke in a ball mill and mill for 6 hours to obtain powdery semi-coke;

[0060] 2) Dissolve 3g of starch and 0.3g of fermentation powder in 30mL of aqueous solution, stir evenly, then add 30g of semi-coke powder, and then ferment at 40°C, take samples after 14 days of fermentation, and then dry and seal them for storage;

[0061] 3) 5 g of fermented semi-coke materials were subjected to high-temperature activation treatment, wherein the activation temperature was controlled to be 800 °C, the heating time was 90 min, and the activation time was 180 min. 2 As an activator, the gas flow rate is 30mL / min, and the semi-coke-based activated carbon obtained after activation is vacuum-dried at 120°C, and then sealed and stored.

[0062] Figure 7 It is the relationship be...

Embodiment 3

[0068] The method for preparing semi-coke-based activated carbon by ball milling assisted organic fermentation technology described in this embodiment comprises the following steps:

[0069] 1) Put 30 g of block semi-coke in a ball mill and grind for 8 hours to obtain powdery semi-coke;

[0070] 2) Dissolve 3g of starch and 0.3g of fermentation powder in 30mL of aqueous solution, stir evenly, then add 30g of semi-coke powder, and then ferment at 40°C, take a sample after 14 days of fermentation, and then dry and seal the sample for storage ;

[0071] 3) 5 g of fermented semi-coke materials were subjected to high-temperature activation treatment, wherein the activation temperature was controlled to be 850 °C, the heating time was 90 min, and the activation time was 120 min. 2 As an activator, the gas flow rate is 30mL / min, and the semi-coke-based activated carbon obtained after activation is vacuum-dried at 120°C, and then sealed and stored.

[0072] Figure 8 Indicates the ...

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Abstract

The invention discloses a method for preparing semi-coke-based activated carbon by a ball-milling-assisted organic fermentation technology, which comprises the following steps: 1) ball-milling blocky semi-coke to obtain semi-coke powder; 2) dissolving an organic substance in water, adding the semi-coke powder, uniformly conducting stirring, and conducting fermenting to obtain fermented semi-coke; and 3) activating the fermented semi-coke at high temperature, and then conducting washing and drying to obtain the semi-coke-based activated carbon. The method has the characteristic of low pollution, and the high-quality semi-coke-based activated carbon can be prepared.

Description

technical field [0001] The invention belongs to the field of the preparation of activated carbon and the treatment and application of waste water containing Cr(VI), and relates to a method for preparing semi-coke-based activated carbon by ball milling assisted organic fermentation technology. Background technique [0002] Semi-coke, also known as semi-coke, is a solid carbonaceous product obtained by pyrolysis of non-caking or weakly cohesive high-volatile coal under medium and low temperature conditions. Fully promote the use. my country's coke industry is concentrated in Shaanxi, Inner Mongolia, Ningxia, Shanxi and Xinjiang. According to statistics from the China Semicoke Association, by the end of 2019, the national semi-coke production capacity was 70 million tons, and the semi-coke output was 38.9 million tons. The output of semi-coke reached 54.736 million tons, and in 2020, the market price of semi-coke was only 600 yuan / ton. Low prices and increased inventories have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/318C01B32/336C12P3/00
CPCC01B32/318C01B32/336C12P3/00
Inventor 杨贵东杨晓娜严孝清许堡荣
Owner XI AN JIAOTONG UNIV