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Method for preparing activated carbon

A technology for preparing activated carbon and activated carbon, which is applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problem of low wear resistance of activated carbon, and achieve the effect of high wear resistance and large specific surface area

Active Publication Date: 2013-08-21
ENERGY RES INST OF SHANDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing activated carbon, the pore size distribution of the activated carbon produced by it can be controlled, and the pore structure is relatively ideal. The disadvantage of low wear resistance of activated carbon prepared by carbonization

Method used

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  • Method for preparing activated carbon
  • Method for preparing activated carbon
  • Method for preparing activated carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 8.8g of soluble starch (analytical pure reagent, Tianjin Guangcheng Chemical Reagent Co., Ltd.) and 3.4g of polyvinyl alcohol (average molecular weight is 2000, Shanghai Kaidu Industrial Development Co., Ltd.), add it to a 250mL conical flask, add 60g Deionized water, dissolve at 100 ° C for 2 hours; weigh 20 g of activated carbon raw materials (coconut shell activated carbon, particle size: 20-44 mesh, Shijiazhuang Hongsen Activated Carbon Co., Ltd.), add it to a triangular flask, shake well, and place at 50 ° C, Immerse in a shaking table at 120 rpm for 6.5 hours, and then dry at 150 °C for 29 hours; the dried samples are placed in a microwave high-temperature sintering furnace (HAMiLab-V3000 microwave high-temperature sintering furnace, Nanjing Xianou Instrument Manufacturing Co., Ltd.) Carbonized at 680°C for 3 hours in a nitrogen atmosphere, and then cooled in a nitrogen atmosphere to obtain 21.76 g of the product. The wear resistance, specific surface area an...

Embodiment 2

[0025] In the process of Example 2 (comparative example), no polyvinyl alcohol was added, and the prepared activated carbon had a pore volume (0.0148 cm) between 2nm3 / g) is less than the pore volume of the activity prepared in Example 1 between 2nm3 / g).

Embodiment 3

[0026] In the process of Example 3 (comparative example), no activated carbon raw material was added, and the process was to prepare activated carbon by a polymer blend carbonization method. The abrasion resistance (87.24%) of the prepared activated carbon was less than the abrasion resistance (98.47%) of the activated carbon prepared in Example 1. %).

[0027] Example 2 (comparative example)

[0028] Weigh 8.8 g of soluble starch (analytical pure reagent, Tianjin Guangcheng Chemical Reagent Co., Ltd.), add it to a 250 mL conical flask, add 60 g of deionized water, and dissolve at 100 ° C for 2 hours; weigh 20 g of activated carbon raw material (coconut shell) Activated carbon, particle size: 20-44 mesh, Shijiazhuang Hongsen Activated Carbon Co., Ltd.), add it into a conical flask, shake well, soak it in a shaker at 50°C and 120 rpm for 6.5 hours, and then dry it at 150°C for 29 hours ; The dried sample was carbonized at 680° C. for 3 hours in a microwave high-temperature sin...

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Abstract

The invention relates to a method for preparing activated carbon. The method comprises the following steps of: weighing one of soluble phenolic resin, furfuryl alcohol resin, polyacrylonitrile and soluble starch, a carbon precursor polymer and one pore-forming agent of polyethylene glycol, polyvinyl alcohol and polyvinyl butyral, mixing, and adding one of methanol, ethanol and deionized water as a solvent for dissolution; and weighing the activated carbon raw material, adding into the solution for dipping, then drying, and carbonizing in a microwave high-temperature sintering furnace at the temperature of 500-1100 DEG C in a nitrogen atmosphere for 0.5-24h. According to the method for preparing activated carbon, provided by the invention, an activated carbon product prepared by the method has abrasion resistance and micropore porosity which are equivalent to those of the raw material activated carbon; and furthermore, the mesopore porosity is further increased in comparison with the raw material activated carbon, and the activated carbon has the advantages of double aperture distribution, large specific surface area and high abrasion resistance, and can meet the application requirements under specific conditions.

Description

technical field [0001] The invention belongs to the technical field of preparation of activated carbon, in particular to a method for preparing activated carbon. Background technique [0002] Activated carbon is one of the commonly used adsorbents and has been widely used in food hygiene, medical treatment, catalysis, nitrogen production by air separation, recovery of hydrogen from coke oven gas, etc. Its adsorption performance is largely determined by its pore structure. feature. The pore distribution of activated carbon is tri-dispersed, that is, macropores, mesopores and micropores all account for a certain proportion. However, the tri-dispersed and wide-distributed pore size structure of activated carbon restricts the application of activated carbon in some fields to a certain extent. Therefore, with the increasing demand for specialized adsorbents in society, effective control of pore size has become the goal pursued by carbon materials researchers. [0003] In order...

Claims

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Application Information

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IPC IPC(8): C01B31/08C01B32/312
Inventor 金付强张晓东许海朋司洪宇华栋梁张杰
Owner ENERGY RES INST OF SHANDONG ACAD OF SCI
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