Preparation method of high performance active carbon

A kind of activated carbon, high-performance technology, applied in the field of preparation of high-performance activated carbon, can solve the problems of complicated production process, unfavorable smooth implementation, high production cost, etc., and achieve the effect of simple process, low production cost and low pollution degree

Inactive Publication Date: 2008-07-02
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

[0004] The above-mentioned patents all use acid and alkali to repeatedly treat the activated coal-based activated carbon to produce high-performance activated carbon, which not only causes a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0015] Example 1: Grind anthracite coal to 50-80 mesh, mix it with KOH according to the weight ratio of 1:6 and place it in the reactor, and pass N 2 Protect, from room temperature to 500°C at a rate of 2°C / min, constant temperature for 2h; then at a rate of 5°C / min to 900°C, constant temperature for 0.5h, and naturally cool to room temperature to obtain an activated material. The activated material is first washed with tap water to near neutral, then immersed in hydrochloric acid for 2 times, 3h each time, then washed with distilled water to neutral, and dried to obtain an ash content of 1.8%. The specific surface area is 3345m. 2 / g of super activated carbon.

Example Embodiment

[0017] Example 2: Grind the weakly caking coal to 80-120 mesh, mix it with KOH at a weight ratio of 1:1, and place it in the reactor, pass in N2 protection, and increase it from room temperature at a rate of 5°C / min. 650°C, constant temperature for 1h; after that, the temperature is increased to 950°C at a rate of 8°C / min, the temperature is kept constant for 1h, and the temperature is naturally cooled to room temperature to obtain the activated material. The activated material was first washed with tap water to near neutral, then immersed in hydrochloric acid for 3 times, 2h each time, then washed with distilled water to neutral, and dried to obtain an ash content of 4.2% and a specific surface area of ​​2438m 2 / g of super activated carbon.

Example Embodiment

[0019] Example 3: Grind the coking coal to 100-150 mesh, mix it with KOH according to the weight ratio of 1:4 and place it in the reactor, pass in N2 protection, and raise it from room temperature to 600°C at a rate of 10°C / min. Constant temperature for 0.5h; then increase to 800°C at a rate of 8°C / min, keep the temperature constant for 2h, and naturally cool down to room temperature to obtain the activated material. The activated material is first washed with tap water to near neutral, then immersed in hydrochloric acid twice, 2h each time, then washed with distilled water to neutral, and dried to obtain an ash content of 3.5% and a specific surface area of ​​2985m 2 / g of super activated carbon.

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Abstract

A preparation method of a high performance activated carbon is provided. Raw material coal is ground to 50-100 meshes and evenly mixed with KO according to weight ratio of 1:1-6. The mixture is placed in a reactor which is pumped in N2 for protection and heated according to a speed of 2-10 DEG C/min from room temperature to the temperature of 500 to 650 DEG C; the temperature is maintained for 0.5-2 hours; then the mixture is heated according to a speed of 5-10 DEG C to the temperature of 800 to 950 DEG C which is maintained for 0.5-2 hours and cooled to room temperature; an activated material is obtained, which is washed by water to a pH value of 7-7.5, then dipped with hydrochloric acid for 2-3 times and 2-3 hours each time, then washed by distilled water to be neutral and dried; the super activated carbon is obtained. The activated carbon prepared by the invention has the advantages that the ash content is small; the specific area is large; the method adopted is simple and accurate with small pollution degree, low cost and simple technical process, which is beneficial to successful implementation of industrialization.

Description

technical field [0001] The invention belongs to a preparation method of high-performance activated carbon. Background technique [0002] With the development of society, the improvement of people's living standards and the stricter environmental protection regulations, the application of activated carbon will expand to many fields, and the application of high-performance activated carbon will also show a rapid development. High-performance activated carbon requires high comprehensive performance, such as specific surface area, pore structure, ash content, etc., all require a reasonable value. At present, the raw materials that can be used to prepare high-performance activated carbon are mainly petroleum coke, resins, and coconut shell-based low-ash carbon-containing precursors. 200610139415 and 200510010965 use coconut shells. The common feature of the above-mentioned raw materials is that they contain little or no ash, and the final activated carbon has very little ash. Ho...

Claims

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Application Information

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IPC IPC(8): C01B31/08
Inventor 李开喜
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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