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Carbon microspheres with high specific surface area and preparation method for carbon microspheres with high specific surface area

A high specific surface area, carbon microsphere technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of complex preparation process of spherical activated carbon, complex preparation process and equipment, poor sphericity of activated carbon products, etc. Enhance the effect of activated pore formation, low cost and lower production cost

Active Publication Date: 2014-03-26
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of the spherical activated carbon of the invention is complicated, the cost of raw materials is relatively high, and the preparation process is not easy to be industrialized
[0007] It can be seen from the above that the current preparation methods of carbon microspheres have high cost of raw materials, complicated preparation process and equipment, inconvenient operation, poor sphericity of activated carbon products, high requirements for equipment in the preparation process, harsh operating conditions, serious pollution, and difficulties in mass production. question

Method used

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  • Carbon microspheres with high specific surface area and preparation method for carbon microspheres with high specific surface area
  • Carbon microspheres with high specific surface area and preparation method for carbon microspheres with high specific surface area
  • Carbon microspheres with high specific surface area and preparation method for carbon microspheres with high specific surface area

Examples

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Effect test

Embodiment 1

[0060] Mix 5 g of carbon black, 20 g of KOH, 5 g of wheat starch and 100 g of water, and stir at 20°C for 1 h. Use a spray dryer to dry and granulate the solution. The spray drying inlet temperature is 230°C, and the outlet temperature is 70-150°C; activate for 10 hours at 800°C in a water vapor atmosphere, and wash with 0.1mol / L hydrochloric acid and water. After drying, high specific surface area carbon microspheres are obtained.

[0061] The high specific surface area carbon microspheres prepared above were used to observe the morphology of the samples with a JSM-7001F field emission scanning electron microscope produced by JEOL Oxford Instruments. figure 1 , figure 2 It is the SEM image of the high specific surface area carbon microspheres obtained in Example 1. It can be seen from the figure that the material has a high degree of sphericity, and the carbon microspheres are composed of carbon black particles, and mesoporous voids are formed between the carbon black part...

Embodiment 2

[0064] Mix 1000 g of KOH, 10 g of polyvinyl alcohol and 1000 g of water, and stir at 60° C. for 3 h. Gained slurry and 1000 grams of charcoal powder are granulated by a disc granulator to obtain primary spherical activated carbon microspheres. Then the obtained material was activated at 900° C. for 24 h under the atmosphere of water vapor and carbon monoxide, washed with 0.1 mol / L hydrochloric acid and water, and dried to obtain carbon microspheres with high specific surface area.

[0065] Particle photos see Figure 4 , it can be seen from the figure that the diameter of the high specific surface area carbon microspheres is 3-5 mm, the sphericity of the particles is high, and the particles are uniform.

Embodiment 3

[0067] Mix 15 grams of petroleum coke powder, 8 grams of KOH, 12 grams of sucrose and 260 grams of water, and stir at 50°C for 1 hour. Use a spray dryer to dry and granulate the solution. The spray drying inlet temperature is 230°C, and the outlet temperature is 70-150°C; After washing with hydrochloric acid and water, the carbon microspheres with high specific surface area are obtained after drying.

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Abstract

The invention relates to a preparation method for carbon microspheres with high specific surface area. The preparation method includes the following steps: a carbon material, an alkaline activator, a binder and a solvent are mixed and stirred to obtain slurry, or the alkaline activator, the binder and the solvent are mixed and stirred to obtain slurry; all the materials are granulated to obtain primary carbon microspheres; the primary carbon microspheres go through activation, pickling, washing and drying to obtain the carbon microspheres with the high specific surface area. The preparation method provided by the invention adopts low-value carbonaceous waste materials or amorphous carbonaceous raw powders to prepare the microsphere carbon material with the high specific surface area, so as to meet the use requirements of multiple fields; the preparation technique is simple, the operation is convenient, and large-scale production is facilitated; the prepared carbon microspheres with the high specific surface area have an excellent spherical structure, a high degree of sphericity and a controllable particle size, and barely contain metal impurities.

Description

technical field [0001] The invention relates to a carbon material and a preparation method thereof, in particular to a high specific surface area carbon microsphere and a preparation method thereof. Background technique [0002] Activated carbon material is an excellent adsorption material. According to different shapes, it can be divided into powder activated carbon, granular activated carbon, fibrous activated carbon and spherical activated carbon. The shape of spherical activated carbon is a regular spherical shape, and the particle size can be at the nanometer level (several to hundreds of nanometers), micron level (several to tens of micrometers), or larger. Due to its smooth surface, regular shape, high mechanical strength, rich micropores, controllable particle size, good fluidity, and small fluid resistance, activated carbon microspheres are widely used in environmental protection, medical treatment, food, military, Chemical industry and other fields. For example, ...

Claims

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Application Information

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IPC IPC(8): C01B31/12C01B32/318C01B32/324C01B32/348
Inventor 苏发兵张美菊张在磊王艳红于静翟世辉
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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