High specific surface area and narrow pore distribution porous carbon material

A technology of high specific surface area, porous carbon materials, applied in the field of porous carbon materials, can solve the problems of limitation, low specific surface area of ​​porous carbon materials, uneven distribution of activated carbon pore size, etc., achieving low equipment requirements, less time-consuming, and simple preparation process Effect

Inactive Publication Date: 2008-07-09
JILIN UNIV
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  • Application Information

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Problems solved by technology

Most of the activated carbon prepared by the traditional chemical activation method has a large specific surface area, which has good effects in various applications. However, due to the uneven pore size distribution of the activated carbon prepared by the chemical activation method, it is used in some fields. The application (such as gas separation) is subject to certa

Method used

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  • High specific surface area and narrow pore distribution porous carbon material
  • High specific surface area and narrow pore distribution porous carbon material
  • High specific surface area and narrow pore distribution porous carbon material

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0030] Example 1:

[0031]Wash the pine needles and dry them. Under the protection of 99.9% nitrogen, carbonize at 450° C. for 3 hours to obtain carbonized products and tar, then pulverize the carbonized products and screen them with a 35-mesh sieve. Dissolve 2 grams of KOH in a mixed solution of 35 mL of water / ethanol (volume ratio 2.5:1), then add 1 gram of carbonized product to the above system, ultrasonically disperse for 5 minutes, soak for 24 hours, and finally dissolve the solvent at 70°C Evaporate to dryness, then activate the remaining mixture under the protection of inert gas (nitrogen or argon 99.9%) at 800°C for 120 minutes, cool to room temperature naturally, then wash the product with water until the pH value of the washing liquid is close to 8, using 0.1mol / Soak in L dilute hydrochloric acid for 3 hours, then wash with water until the pH value of the washing solution is close to 7, then dry in the air at 100°C for 7 hours, and finally obtain a porous carbon ma...

Example Embodiment

[0032] Example 2:

[0033] The experimental method is the same as in Example 1, except that the amount of the activator KOH is changed to 3 grams, and a porous carbon material is also obtained, and the specific surface area of ​​the material is 1900m 2 / g, the pore size is mainly 1.5 nm.

Example Embodiment

[0034] Example 3:

[0035] The experimental method is the same as in Example 1, except that the amount of the activator KOH is changed to 4 grams, and the porous carbon material is obtained equally, and the specific surface area of ​​the material is 2014m 2 / g, the pore size is mainly 1.5 nm.

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Abstract

The invention belongs to the preparing field of porous carbon materials, which relates to a porous carbon material with high specific surface area and narrow pore distribution and which is prepared by adopting pin needles with biomass materials. The specific surface area of the porous carbon materials is capable of surpassing 3000m/2g by adjusting activating agent dosage, activating temperature and activating time. The method of the invention has low requirement for production facilities, and has simple preparing process and low time-consumption. The main byproduct of the reaction is tar which is a product with high value in use. The washing solution of the porous carbon materials is aqueous solution which is rich in potassium ions, and is perfect potash fertilizer for agricultural industry via simple dealing. The porous carbon materials have high application prospect in the fields like the storage and separation of gas, electrode materials, catalysts or catalyst carriers in a plurality of chemical reactions, sewage disposal, recovery of noble metals and the like. The method has the advantages of cheap, plentiful and easily gained raw materials, simple preparing process, preparing condition without region limitation, thereby being adapted for large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of porous carbon material preparation, and in particular relates to a porous carbon material with high specific surface area and relatively high specific surface area prepared by using pine needles, a biomass material, as a raw material. Background technique [0002] Due to the rich pore structure and high specific surface area, porous carbon materials are widely used in daily life and industrial production. At present, porous carbon materials are mainly used in the absorption of harmful gases, sewage treatment, gas storage and separation, electrode materials for batteries or capacitors, catalysts or catalyst carriers for various chemical reactions, and recovery of precious metals. With the development of society, the demand for porous carbon materials is also increasing. The more common porous carbon materials in daily life are mainly activated carbon, and the production process of activated carbon is also emerging ...

Claims

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Application Information

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IPC IPC(8): C01B31/02C01B31/08
Inventor 陈接胜张锋李国栋
Owner JILIN UNIV
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