Preparation method of pecan shell active carbon

Abstract

The invention relates to a preparation method of pecan shell active carbon. Pecan shells are crushed and are then dried; then, the dried walnut shells are added into a phosphoric acid solution with the concentration being 20 to 35 weight percent to be soaked; filtering is performed; filter slag obtained through filtering is put into a muffle furnace to be heated and activated; then, the materials are cooled to room temperature to obtain activated materials; the activated materials are subjected to acid washing, and are then washed by water to a neutral state; finally, sieving is performed to obtain a finished product. The method provided by the invention has the advantages that the process is simple; the operation is convenient; the consumption of a great number of energy sources is not needed; the cost is low; the pecan shells are used as a raw material; the source of the raw material is wide; the ecological environment is protected; the adsorption effect of the prepared active carbon is good.

Description

technical field [0001] The invention relates to a preparation method of activated carbon, in particular to a preparation method of pecan shell activated carbon, which belongs to the technical field of fine chemicals. Background technique [0002] Activated carbon is a carbonaceous adsorption material with rich pore structure and huge specific surface area. It has the characteristics of strong adsorption capacity, good chemical stability, high mechanical strength, and convenient regeneration. It is widely used in industry, agriculture, and national defense. , transportation, medical and health, environmental protection and other fields, its demand is increasing year by year with the social development and the improvement of people's living standards, especially in recent years, with the increasing requirements of environmental protection, the demand for activated carbon at home and abroad Getting bigger and bigger every year. [0003] At present, activated carbon mostly uses...

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Problems solved by technology

[0003] At present, activated carbon mostly uses wood as raw material, which is relatively expensive, and this will undoubtedly cause a large number of forests to be cut down, seriously damaging the ecology, and the production process often involves high temperatures above 800 ° C, which requires high equipment and consumes a lot of energy.