A kind of preparation method of high yield mesoporous activated carbon

Abstract

The invention relates to a preparation method of high-yield mesoporous activated carbon. According to the method, a flame-retardant mechanism of an intumescent flame retardant is taken as a theoretical basis, biomass solid wastes are taken as a raw material, ammonium polyphosphate is taken as a novel activating agent, the mixture is subjected to ultrasonic uniform mixing and dipping at the room temperature and then activated, and the mesoporous activated carbon is prepared. A tedious process for removing a template agent by consuming strong acid is avoided, and besides, processes with high consumption of activators for high-temperature activation with a conventional physical activation method, high cost, environment pollution and the like are avoided. The preparation method has the advantages that the raw materials are cheap and widely-sourced, the activator is cheap and easy to obtain, the preparation is relatively simple, operation and control are easy, large-scale production is facilitated and the like, and the prepared activated carbon has excellent performance; the yield of the activated carbon is substantially improved, and the mesoporous activated carbon has remarkable economic and social benefits.

Description

technical field [0001] The invention relates to a method for preparing high-yield mesoporous activated carbon, in particular to a method for preparing high-yield mesoporous activated carbon by using ammonium polyphosphate as an activator, and belongs to the technical field of activated carbon. Background technique [0002] Activated carbon, also known as activated carbon black, is black powder or block, granular, honeycomb amorphous carbon, and there are also regular crystalline carbons. It is mainly made of carbon-rich biological organic matter (such as coal, wood, fruit shell, petroleum, asphalt, straw) raw materials, which are converted into hydrophobic materials through pyrolysis reactions such as high-temperature carbonization and activation. Due to its developed pore structure, stable physical and chemical properties, activated carbon has been widely used in chemical industry, hydrometallurgy, environmental protection, pharmaceutical refining, food processing, military...

AI Technical Summary

Problems solved by technology

Chinese patent document CN 102616778 A discloses a method for preparing mesoporous activated carbon by microwave heating and regenerating waste coal-based activated carbon. After continuous heating and heat preservation, water vapor or carbon dioxide is introduced into the atmosphere to activate mesoporous activated carbon. However, the above reported The method has the following significant defects: large amount of template agent, high cost, low yield, cumbersome process, high preparation temperature, consumption of a large amount of strong corrosive acid to remove the template, etc.

The invention uses a binder composed of several compounds to replace coal tar, which can avoid serious pollution caused by using coal tar as a binder, save a large amount of expensive coal tar, and reduce production costs; the strength of the activated carbon obtained is Good, very little dust, and has high adsorption capacity; can be used for water treatment, deodorization, decolorization, catalyst carrier, and CO2 in pressure swing adsorption 2 , N 2 Gas removal, used for gas phase adsorption, used for solvent recovery, carbon catalyst, etc. Although this patent avoids serious pollution caused by using coal tar as a binder, the product yield is low, and the obtained activated carbon is not mesoporous activated carbon

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