Preparation method of coal-based mesoporous activated carbon

Abstract

The invention discloses a preparation method of coal-based mesoporous activated carbon. The preparation method comprises the following steps: crushing raw coal to obtain pulverized coal, adding the pulverized coal, an activator, ethanol and a ball-milling ball into a planetary ball mill, and performing ball milling to obtain a mixture; activating the bal-milled mixture in a nitrogen atmosphere toobtain an activated material; adding the activated material into a supercritical device, soaking the activated material in a supercritical acetone-water system, then filtering, washing and drying theobtained system, adding the dried material into an alkaline solution, and performing ultrasonic soaking; and filtering and drying the ultrasonically soaked material, placing the dried material in a sealed glass tank, irradiating the material with an electron beam irradiation device, washing the irradiated material with water, and drying the washed material to obtain the coal-based activated carbon. The coal-based mesoporous activated carbon obtained by the preparation method has a high specific surface area and a high mesoporosity, and has a high adsorption value for methylene blue.

Description

technical field

[0001] The invention belongs to the technical field of activated carbon preparation, in particular to a method for preparing 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 hand, which m...