Method for preparing activated carbon material with humic acid as raw material and application of activated carbon material

Abstract

The invention relates to a method for preparing activated carbon with humic acid as a raw material and an application of the activated carbon. The method comprises the steps of mixing industrial humic acid with an activating agent which is potassium hydroxide, sodium hydroxide, zinc chloride, potassium carbonate or phosphoric acid uniformly to react under inert atmosphere protection for 1-5 hours; then cooling the product, washing the product in an acid solution until the pH value is 6-7 and drying the product, thus obtaining the activated carbon. The method is convenient to operate, is relatively low in energy consumption and is suitable for large-scale industrial production. The humic acid porous activated carbon material obtained by the method has a rich porous structure and a relatively big specific surface area, is used for preparing water purifiers or electrode materials of supercapacitors, and has methylene blue dye adsorption value of 600mg / g. Besides, the humic acid porous activated carbon material is used as the electrode material of a supercapacitor to assemble a high-performance supercapacitor. The specific capacitance of the activated carbon single electrode is 351Fg<-1>. Various test results show that the activated carbon is microporous-mesoporous composite carbon and has specific surface area of about 3200m<2> / g, the pore size distribution of the activated carbon is 1-5nm, and the pore volume of the activated carbon is about 2cm<3> / g.

Description

technical field [0001] The invention relates to a method for preparing a high-performance activated carbon material using humic acid as a raw material, and the application of the activated carbon as a water purifying agent and a supercapacitor electrode material. Background technique [0002] Activated carbon is a kind of porous carbon material, which has the characteristics of highly developed pore structure and huge specific surface area, strong adsorption capacity, good chemical stability, high mechanical strength, and easy regeneration after use failure. As an excellent adsorbent and catalyst carrier, activated carbon has been widely used in the chemical industry, [0003] In the fields of food processing, transportation energy, medical care, agriculture, national defense, etc., as well as environmental protection and human life, 51 of the 64 organic pollutant indicators in the drinking water standards of the US Environmental Protection Agency (USEPA) list activated carb...

AI Technical Summary

Problems solved by technology

Traditional activated carbon preparation mostly uses wood, charcoal, and coal as raw materials. With the enhancement of social environmental protection awareness, especially the catastrophic floods that occurred in the Yangtze River, Songhua River, and Nen River basins in 1998, people have realized the impact of ecological environment deterioration. The huge negative impact on national survival and sustainable development, the country quickly implemented a ban on natural forest logging, resulting in a shrinking source of wood and charcoal, which greatly restricted the raw materials for preparing activated carbon, and the price also showed an upward trend

The disadvantage of coal-based activated carbon is that in different regions, the properties of coal mined at different times are quite different, and the composition is not fixed, so it is difficult to ensure the reproducibility of the prepared activated carbon.

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