A kind of preparation method of coal-based mesoporous activated carbon

Abstract

The invention discloses a preparation method of coal-based mesoporous activated carbon, comprising: pulverizing raw coal to obtain coal powder, adding coal powder, activator, ethanol and ball milling balls into a planetary ball mill for ball milling to obtain a mixed material; Under the atmosphere, the mixed material after ball milling is activated to obtain the activated material; the activated material is added to a supercritical device, soaked in a supercritical acetone-water system, then filtered, washed, dried, and the dried The material is ultrasonically soaked in an alkaline solution; the ultrasonically soaked material is filtered and dried, then placed in a sealed glass jar, irradiated by an electron beam irradiation device, washed with water, and dried to obtain coal-based activated carbon. The coal-based mesoporous activated carbon obtained by the preparation method of the invention has a higher specific surface area and a higher mesopority, and at the same time, the coal-based mesoporous activated carbon has a higher adsorption value for methylene blue.

Description

technical field [0001] The invention belongs to the technical field of activated carbon preparation, and in particular relates to a preparation method of coal-based mesoporous activated carbon. Background technique [0002] Activated carbon is a carbonaceous adsorption material with rich pore structure and huge specific surface area. It has the advantages of strong adsorption and good chemical stability. It is widely used in industry, agriculture, national defense, transportation, medicine and health, environmental protection, etc. In recent years, with the increasing requirements for environmental protection, the demand for activated carbon at home and abroad is increasing, and the development of activated carbon is also becoming more and more rapid. In particular, the development of coal-based activated carbon is due to the abundant reserves of coal resources and low cost on the one hand, and the maturity and progress of coal-based activated carbon technology on the other ...

AI Technical Summary

Problems solved by technology

The use of coal to prepare mesoporous activated carbon has the advantages of abundant resources and excellent preparation effects. However, the mesoporous activated carbon prepared in the prior art has problems such as low mesoporosity, which leads to the fact that the preparation of activated carbon from coal does not reflect the efficient use of coal as an energy source.