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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: 2015-04-15
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 8.8 g of soluble starch (reagent of analytical grade, Tianjin Guangcheng Chemical Reagent Co., Ltd.) and 3.4 g of polyvinyl alcohol (average molecular weight of 2000, Shanghai Kaidu Industrial Development Co., Ltd.), add them to a 250mL conical flask, and add 60g Dissolve in deionized water for 2 hours at 100°C; weigh 20g of activated carbon raw material (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 shaker at 120 rpm for 6.5 hours, and then dry at 150°C for 29 hours; the dried sample was placed in a microwave high-temperature sintering furnace (HAMiLab-V3000 microwave high-temperature sintering furnace, Nanjing Xianou Instrument Manufacturing Co., Ltd.) Carbonization at 680°C for 3 hours in a nitrogen atmosphere, and then cooling in a nitrogen atmosphere to obtain 21.76g of the product, the wear resistance, specific surface area ...

Embodiment 2

[0025] In the process of embodiment 2 (comparative example), polyvinyl alcohol is not added, and the pore volume (0.0148 cm) of the prepared activated carbon is between 2nm3 / g) less than the pore volume (0.0681 cm) of the activity prepared in Example 1 between 2nm3 / g).

Embodiment 3

[0026] In the process of embodiment 3 (comparative example), no active carbon raw material is added, and the process prepares active carbon for the polymer blending carbonization method, and the wear resistance (87.24%) of the prepared active carbon is less than the active carbon wear resistance prepared by embodiment 1 (98.47%) %).

[0027] Embodiment 2 (comparative example)

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

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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, and in particular relates to a method for preparing activated carbon. Background technique [0002] Activated carbon is one of the commonly used adsorbents. It has been widely used in food hygiene, medical treatment, catalysis, air separation nitrogen production, and hydrogen recovery in coke oven gas. Its adsorption performance is largely determined by its pore structure. feature. The pore distribution of activated carbon is three-dispersed, that is, macropores, mesopores and micropores all account for a certain proportion. However, the three-dispersed wide-distribution pore structure of activated carbon restricts the application of activated carbon in certain fields to a certain extent. Therefore, as the society's demand for special adsorbents increases, effective control of the pore size has become the goal pursued by carbon material researchers. [0003] To prepare ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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