Preparation method of super-high specific surface area activated carbon

Abstract

The invention relates to the technical field of functional materials, in particular to a preparation method of super-high specific surface area activated carbon. Soapberry residues with raw biodiesel extracted are washed by 80% ethanol water solution, dried, crushed and impregnated by ethanol, unstable carbonaceous organic materials in the soapberry residues are removed, a framework, the carbon yield and the strength of activated carbon are enhanced, the treated soapberry residues are placed into a microwave reactor and carbonized, carbonized materials of the activated carbon are mixed with a composite activator comprising KOH and K2CO3, mixture is uniformly grinded, 10g of the grinded mixture is placed into a tubular furnace, the carbonized materials are activated under N2 protection, the activated carbon is firstly soaked in 1mol / L of hydrochloride acid solution for 2 hours and then washed with distilled water after cooling until a pH (potential of hydrogen) value is unchanged, and the activated carbon is placed into a 110 DEG C thermostatic blast drying oven and dried to obtain an activated carbon test sample. The activated carbon has super-high specific surface area and high mesoporous proportion and can be used for electrode materials of super-capacitors.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a method for preparing activated carbon with an ultra-high specific surface area. Background technique [0002] As a porous adsorption material, activated carbon has rich pore structure, high specific surface area, excellent adsorption performance and stable chemical properties, and is widely used in chemical, medical, military, environmental protection and other fields. However, with the continuous development of medicine, environmental protection, military and other fields, ordinary activated carbon (specific surface area 800~1500 m 2 / g) Due to poor selective adsorption, low specific surface area, and limited adsorption capacity, it can no longer meet the special requirements of these fields, which makes the demand for activated carbon with high specific surface area continue to rise. [0003] Activated carbon with ultra-high specific surface area (referred to as...

AI Technical Summary

Problems solved by technology

Sapindus, as an important energy tree species, has been vigorously planted all over the country, especially in Fujian Province. After extracting biodiesel raw material oil from Sapindus sapindus, a large amount of residue is left, which contains a large amount of cellulose. The carbon content in the residue is as high as 49.34 %, discarding both damages the environment and wastes resources