A preparation method of extremely rich microporous carbon material based on carboxylation anchoring effect

Abstract

The invention provides a method for preparing a very rich microporous carbon material based on carboxylation anchoring, which comprises the following steps: (1) pretreating waste biomass, washing, drying and pulverizing. (2) Immerse the biomass particles in the small molecular organic carboxylic acid solution, and then dry them in a blast drying oven. The dried materials are reacted at 100-200°C for 1-12 hours, and then the materials are washed to neutral , and the carboxylated material was obtained after drying. (3) At a temperature of 50-150°C, immerse the carboxylated material in a 0.1-2mol / L alkali metal hydroxide solution for ion exchange for 1-24 hours, and make the metal ions evenly distributed through the anchoring effect of the carboxyl group On the material surface, then wash with water to remove excess alkali to neutral and dry. (4) Finally, the obtained material is placed in a tube furnace under N 2 Carry out high-temperature carbonization under the atmosphere, and obtain the final product rich microporous carbon material after washing and drying.

Description

technical field [0001] The invention relates to the field of activated carbon production, in particular to a method for preparing a carbon material rich in extremely microporous carbons based on carboxylation anchoring. Background technique [0002] Porous carbon material is a carbon material with pore structures of different sizes. It has a highly developed specific surface area and pore structure. As a new material, it has excellent physical and chemical properties, such as electrical conductivity, heat conduction, high temperature resistance, and corrosion resistance. It shows excellent application prospects in catalysis, lithium battery electrode materials, adsorption, ammonia storage, hydrogen storage, capacitors and other fields. [0003] Porous carbon adsorption technology has great development and application potential, and the rational design of porous carbon materials is crucial to its adsorption performance. Activated carbon is an effective adsorbent that can be ...

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Problems solved by technology

However, this activated carbon preparation method needs to be physically mixed with 3-4 times the chemical activation reagent of the carbon precursor and calcined at a high temperature to prepare an excellent pore structure, resulting in the consumption of a large amount of chemical reagents during the preparation of activated carbon and causing environmental pollution. ; A large number of strong acids, strong alkalis and alkali metal salts under high temperature conditions not only cause corrosion to instruments and equipment, but also easily cause the collapse of extremely micropores and form mesopores or even macropores, which is not conducive to the adsorption of small molecule pollutants removal, and more importantly, the method of physical impregnation coupled with pyrolysis cannot adjust the pore structure of the activated carbon in an orderly manner, resulting in the pore structure of the prepared activated carbon showing irregular pore size and disorder

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