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Preparation method of microporous activated carbon and chemical agent pore size regulation

A chemical agent and activated carbon technology, which is applied in the field of microporous activated carbon materials and its preparation, can solve the problems of low product yield, high production cost, and non-adjustable pore size, and achieve the effects of simple process, low cost, and reduced usage

Active Publication Date: 2011-12-14
贵州森环活性炭有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] In order to solve the disadvantages of high production cost, low product yield and non-adjustable pore size in the prior art, the present invention provides a method for preparing microporous activated carbon by chemical pore size control. The preparation method is simple and fast, the product yield is high, and the cost is low. Low, concentrated micropore distribution, controllable micropore size

Method used

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  • Preparation method of microporous activated carbon and chemical agent pore size regulation
  • Preparation method of microporous activated carbon and chemical agent pore size regulation
  • Preparation method of microporous activated carbon and chemical agent pore size regulation

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Effect test

Embodiment 1

[0052] (1) Shell sieving: Dry the coconut shell, crush it, and sieve out 0.6mm-1.0mm particles.

[0053] (2) Low-concentration impregnation treatment of chemical agents: prepare zinc chloride into a solution with a mass concentration of 20%, mix pure zinc chloride and coconut shell at a mass ratio of 0.2:1, impregnate for 24 hours, and dry at 100°C .

[0054] (3) Low-temperature activation: heat the dry zinc chloride-coconut shell mixture to 400°C at 5°C / min under a nitrogen atmosphere, and maintain it for 60mins. After the activation is completed, cool, wash, and dry to obtain an activated carbon sample. Activated carbon has a microporosity of 80% and a specific surface area of ​​370m 2 / g, the yield is 60%, the iodine adsorption value is 355mg / g, and the methylene blue adsorption value is 30ml / g.

[0055]

Embodiment 2

[0057] (1) Shell sieving: Dry the coconut shell, crush it, and sieve out 0.6mm-1.0mm particles.

[0058] (2) Low-concentration impregnation treatment of chemical agents: Prepare zinc chloride into a solution with a mass concentration of 20%, mix it with coconut shell at a mass ratio of 0.4:1, impregnate for 24 hours, and dry at 100°C.

[0059] (3) Low-temperature activation: heat the dry zinc chloride-coconut shell mixture to 400°C at 5°C / min under a nitrogen atmosphere, and maintain it for 60mins. After the activation is completed, cool, wash, and dry to obtain an activated carbon sample. Activated carbon has a microporosity of 75% and a specific surface area of ​​670m 2 / g, the yield is 54%, the iodine adsorption value is 455mg / g, and the methylene blue adsorption value is 50ml / g.

Embodiment 3

[0061] (1) Shell sieving: Dry the coconut shell, crush it, and sieve out 0.6mm-1.0mm particles.

[0062] (2) Low-concentration impregnation treatment of chemical agents: Prepare zinc chloride into a solution with a mass concentration of 20%, mix it with coconut shell at a mass ratio of 0.6:1, impregnate for 24 hours, and dry at 100°C.

[0063] (3) Low-temperature activation: heat the dry zinc chloride-coconut shell mixture to 400°C at 5°C / min under a nitrogen atmosphere, and maintain it for 60mins. After the activation is completed, cool, wash, and dry to obtain an activated carbon sample. Activated carbon has a microporosity of 90% and a specific surface area of ​​770m 2 / g, the yield is 47%, the iodine adsorption value is 655mg / g, and the methylene blue adsorption value is 60ml / g.

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Abstract

The invention provides a microporous active carbon preparation method by chemical aperture regulation and control. First, a fruit casing is dried and mixed with a chemical agent diluted solution according to a low dipping ratio; the fruit casing is fully dipped and dried at a certain temperature. A mixture is slowly heated to an activation temperature under an inert atmosphere and insulted for a while; after the activation, the mixture is cooled and treated with washing, pickling, washing and drying to obtain a microporous normal distribution concentrated fruit casing base active carbon. The invention has advantages of low dipping ratio, small usage amount of chemical agent, low activation temperature and high product rate, so as to realize low coasts and a simple preparation technology. Meanwhile, the prepared active carbon has greatly concentrated and adjustable microporous apertures and significant added value, and is suitable for industrial production.

Description

[0001] technical field [0002] The invention relates to a microporous activated carbon material and a preparation method thereof, in particular to a low-consumption and simple method for preparing fruit shell-based microporous activated carbon by chemically regulating the aperture. [0003] Background technique [0004] Due to the characteristics of its raw materials, wood activated carbon has a relatively dispersed pore size distribution after conventional activation. In the professional use of activated carbon, molecular sieve activated carbon with concentrated micropore size distribution has high working efficiency and has great potential application prospects in supercapacitor materials, lithium-ion batteries, blood purification, etc., and is currently a research hotspot of advanced carbon materials. [0005] The current chemical method generally uses phosphoric acid as the activator, and the ratio of phosphorus to wood is generally about 4:1, and is activated at 600°C...

Claims

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Application Information

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IPC IPC(8): C01B31/08
Inventor 孙康蒋剑春刘雪梅邓先伦崔丹丹戴伟娣卢辛成
Owner 贵州森环活性炭有限公司