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A kind of preparation method of stalactite-like macroporous activated carbon

A technology of activated carbon and stalactite, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of long activation time, high energy and protective gas consumption, high activation temperature, etc., to achieve fast reaction speed and shorten The effect of activation time and low ambient temperature

Active Publication Date: 2019-12-24
GUIZHOU MEILING POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the preparation method of activated carbon disclosed above, the activation reaction temperature is above 700°C, and the activation time is 1-3 hours. The activation temperature is relatively high, and the time required for activation is relatively long, which will lead to relatively high consumption of energy and protective gas.

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  • A kind of preparation method of stalactite-like macroporous activated carbon
  • A kind of preparation method of stalactite-like macroporous activated carbon
  • A kind of preparation method of stalactite-like macroporous activated carbon

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Embodiment 1

[0037] A preparation method for stalactite-like macroporous activated carbon, comprising the following steps:

[0038] (1) According to the mass ratio of 1:5, take activated carbon and potassium hydroxide with a total mass of 180g as the activated activated carbon precursor, and place it in a ball mill tank with a rotating speed of 200r / min to 1200r / min for 15min to 2h to mix evenly. Divide into 10 parts on average, each part is 18g, and then press the activated activated carbon precursor after ball milling into a sheet, and set a heat-conducting substrate on both sides so that it is between two heat-conducting substrates;

[0039] (2) Take iron powder and potassium perchlorate as high-temperature self-ignition agent according to the mass ratio of 83:17, after being pressed into a sheet, place the outer surface of the above-mentioned heat-conducting substrate without activated activated carbon precursor; described potassium perchlorate as oxidant;

[0040] (3) Weigh zirconium...

Embodiment 2

[0044] A preparation method for stalactite-like macroporous activated carbon, comprising the following steps:

[0045] (1) According to the mass ratio of 1:5, take 180g of activated carbon and potassium hydroxide as the precursor of activated activated carbon, and place them in a ball mill tank with a rotation speed of 200r / min to 1200r / min for 15min to 2h to mix evenly. Divide into 10 parts, each part 18g, and then press the activated activated carbon precursor after ball milling into a sheet, and set a heat-conducting substrate on both sides so that it is between two heat-conducting substrates;

[0046] (2) Take iron powder and potassium perchlorate as high-temperature self-ignition agent according to the mass ratio of 83:17, after being pressed into a sheet, place the outer surface of the above-mentioned heat-conducting substrate without activated activated carbon precursor; described potassium perchlorate as oxidant;

[0047] (3) Weigh zirconium and barium chromate as a l...

Embodiment 3

[0051] A preparation method for stalactite-like macroporous activated carbon, comprising the following steps:

[0052] (1) According to the mass ratio of 1:4, take 180g of activated carbon and potassium hydroxide as the precursor of activated activated carbon, and place them in a ball mill tank with a rotation speed of 200r / min to 1200r / min for 15min to 2h to mix evenly. Divide into 10 parts, each part 18g, and then press the activated activated carbon precursor after ball milling into a sheet, and set a heat-conducting substrate on both sides so that it is between two heat-conducting substrates;

[0053] (2) take iron powder and sodium perchlorate as high-temperature self-ignition agent according to the mass ratio of 83:17, after being pressed into a sheet, place the outer surface of the non-activated activated carbon precursor of the above-mentioned heat-conducting substrate; Sodium chlorate as an oxidizing agent;

[0054] (3) Weigh zirconium and barium chromate as a low-te...

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Abstract

The invention discloses a preparation method of stalactite-shaped macroporous activated carbon, which comprises the following steps: ball milling the precursor of activated activated carbon for 15 minutes to 2 hours, pressing it into a sheet shape, and setting heat-conducting bases on both sides of the activated carbon so that it is between two pieces of heat-conducting bases Between; after pressing the high-temperature self-igniting agent into a sheet, place it on the side of the above-mentioned heat-conducting substrate without activated activated carbon precursor; after pressing the low-temperature self-igniting agent into a sheet, place it on the outer surface of the above-mentioned high-temperature self-igniting agent , activate the activated carbon precursor, high-temperature self-igniting agent, low-temperature combustion-supporting agent and heat-conducting substrate to make a sandwich structure; place the above-mentioned sandwich structure in a closed argon, nitrogen or vacuum atmosphere and heat to 120 ° C ~ 200 ° C, then cool to room temperature Finally, stalactite-like macroporous activated carbon is obtained. The invention reduces the traditional activation environment temperature from above 800°C to 120°C-200°C, shortens the activation time, and has the advantages of high efficiency, high safety, low energy consumption and good appearance of activated carbon.

Description

technical field [0001] The invention belongs to the technical field of activated carbon materials, in particular to a preparation method of stalactite-like macroporous activated carbon. Background technique [0002] Activated carbon has the advantages of high specific surface area, low cost, high chemical and thermal stability, and high electrical conductivity. Although conventional activated carbon has more than 2000m 2 / g specific surface area, but the actual utilization rate is not high, the reason is that the porous activated carbon material prepared by the existing process conditions cannot avoid the formation of micropores with a pore diameter below 2nm, and the pore diameter of the ideal porous carbon material is generally larger than 2nm can effectively form an electric double layer or be used for material growth. Therefore, it is necessary to use chemical activation to increase the specific surface area and control the diameter of the micropores so that the diamet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/348
CPCC01B32/348C01B32/354
Inventor 郭灏唐立成吴宁宁陈晓涛石斌陈铤
Owner GUIZHOU MEILING POWER SUPPLY CO LTD
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