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Mesoporous petroleum-coke-based activated carbon and preparation method thereof

A technology of activated carbon and petroleum coke, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of low yield, difficult petroleum coke impregnation treatment, general final effect, etc., and achieve the effect of high proportion

Inactive Publication Date: 2018-07-06
GUANGDONG JUSHI CHEM CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example: CN 106082213A discloses a composite petroleum coke-based activated carbon and its preparation method. The raw material of petroleum coke is pretreated by an oxidizing medium, the dense crystal structure of petroleum coke is changed, and the number of active points on the surface is conducive to activation of pore formation. , to prepare an activated carbon for supercapacitors with a high proportion of mesopores, but this method will introduce some impurity elements and the yield is low
CN 104649267A discloses a method for preparing activated carbon for supercapacitors. The mixed solvent of ethanol-water is used to regulate the pore size distribution of activated carbon through a vacuum impregnation process. Although this method can impregnate the surface of petroleum coke, it is difficult to clean the inside of petroleum coke. Dipping treatment, the final effect is general

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  • Mesoporous petroleum-coke-based activated carbon and preparation method thereof
  • Mesoporous petroleum-coke-based activated carbon and preparation method thereof

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preparation example Construction

[0024] A preparation method of mesoporous petroleum coke-based activated carbon, comprising the following steps:

[0025] 1) Crushing, grinding and sieving petroleum coke raw materials to obtain petroleum coke powder;

[0026] 2) mixing the petroleum coke powder and the ionic liquid, fully impregnating, filtering, recycling and reusing the filtrate, washing the solid product with water to neutrality, and drying to obtain the pretreated petroleum coke powder;

[0027] 3) Mix the pretreated petroleum coke powder with an activator, place it in a closed furnace, fill it with protective gas, and activate it, and then wash, pickle, wash, and dry the activated product to obtain mesoporous petroleum coke Coke-based activated carbon.

[0028] Preferably, the petroleum coke raw material in step 1) is at least one of needle coke, sponge coke, spherical coke and pitch coke.

[0029] Preferably, the petroleum coke raw material in step 1) is uncalcined petroleum coke.

[0030] Preferably...

Embodiment 1

[0049] A preparation method of mesoporous petroleum coke-based activated carbon, comprising the following steps:

[0050] 1) Crushing, grinding and sieving the needle coke before calcining to obtain petroleum coke powder with a particle size of 75-150 μm;

[0051] 2) Mix petroleum coke powder and ionic liquid 1-butyl-3-methylimidazolium hydroxide according to the mass ratio of 1:1.5, impregnate at room temperature for 12 hours, filter, recover and recycle the filtrate, wash the solid product until neutral, Dry to obtain pretreated petroleum coke powder;

[0052] 3) Mix the pretreated petroleum coke powder and KOH at a mass ratio of 1:3, place in a tube furnace, fill with nitrogen, raise the temperature to 700°C at a heating rate of 10°C / min, activate at constant temperature for 2 hours, and then The activated product is washed with water, pickled, washed with water until neutral, and dried to obtain mesoporous petroleum coke-based activated carbon with a specific surface area...

Embodiment 2

[0054] A preparation method of mesoporous petroleum coke-based activated carbon, comprising the following steps:

[0055] 1) Crushing, grinding and sieving the sponge coke before calcining to obtain petroleum coke powder with a particle size of 75-150 μm;

[0056] 2) Mix petroleum coke powder and ionic liquid 1-ethyl-3-methylimidazolium hydroxide according to the mass ratio of 1:0.5, impregnate at room temperature for 12 hours, filter, recover and recycle the filtrate, wash the solid product with water until neutral, Dry to obtain pretreated petroleum coke powder;

[0057] 3) Mix the pretreated petroleum coke powder and KOH according to the mass ratio of 1:2.5, place in a tube furnace, fill with nitrogen, raise the temperature to 650°C at a heating rate of 15°C / min, activate at constant temperature for 3 hours, and then The activated product is washed with water, pickled, washed with water until neutral, and dried to obtain mesoporous petroleum coke-based activated carbon wit...

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Abstract

The invention discloses mesoporous petroleum-coke-based activated carbon and a preparation method thereof. The preparation method of the mesoporous petroleum-coke-based activated carbon comprises thefollowing steps: 1) smashing, grinding and screening a petroleum coke raw material to obtain petroleum coke powder; 2) mixing the petroleum coke powder with ionic liquid, fully dipping, filtering, recycling filtrate, washing a solid product to a neutral state by water and drying to obtain pretreated petroleum coke powder; (3) mixing the pretreated petroleum coke powder with an activator, putting in a sealed type furnace body, introducing protection gas, activating and then water washing, acid washing, water washing and drying an activated product to obtain the mesoporous petroleum-coke-based activated carbon. According to the preparation method disclosed by the invention, ionic liquid dipping is utilized to pretreat the petroleum coke; thus, hole structures and microcrystalline structuresof the petroleum coke are changed, dispersion of an KOH activator in the petroleum coke is beneficiated, and a mesoporous proportion in the prepared petroleum-coke-based activated carbon is high.

Description

technical field [0001] The invention relates to a mesoporous petroleum coke-based activated carbon and a preparation method thereof. Background technique [0002] Petroleum coke is a by-product of petrochemical industry. It has the characteristics of rich raw materials, high carbon content and low ash content. It is an ideal raw material for preparing activated carbon. At present, when petroleum coke is used as raw material to prepare activated carbon, most of them use alkali metal hydroxide as activator to activate by chemical method. Due to the high degree of graphitization of petroleum coke, it is difficult to activate, and the alkali-carbon ratio is generally as high as (3-8): 1 , and the pore size of activated carbon obtained by direct activation is mainly distributed in the range of micropores (<2nm), which limits its application in the fields of macromolecular adsorption and supercapacitors. [0003] In order to increase the specific surface area of ​​activated ca...

Claims

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Application Information

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IPC IPC(8): C01B32/33C01B32/348
Inventor 李桂林梁亚涛朱红芳陈钢杨正高
Owner GUANGDONG JUSHI CHEM CO LTD
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