Powder active carbon prepared by using turf as raw material and preparation method of powder active carbon

Abstract

The invention provides a powder active carbon, which is prepared by using turf as a raw material. The powder active carbon is characterized in that the specific surface area of the powder active carbon is 1200-1400 m<2> / g, the iodine adsorption capacity is 1000-1200mg / g, and the methylene blue absorbing value is 130-200mg / g. The powder active carbon is prepared by the method provided by the invention. The preparation method comprises the following steps of 1) removing impurities by using a turf sieve, drying and crushing the sieved turf; 2) putting the crushed turf into sodium carbonate solution with a weight ratio of (3-5) to 1, mixing the mixture evenly into mud immersion, and drying the mixture; 3) raising the temperature of the dried mixture to 500 DEG C a program of 10 DEG C / min, taking out the cooled mixture to be grinded, and washing away excessive anhydrous sodium carbonate and surface residue with dilute nitric acid, and washing the mixture with deionized water to a pH value of 4.5-4.8, performing suction filtering and drying for the mixture to obtain powder active carbon. The invention further discloses a method for preparing the powder active carbon.

Description

technical field [0001] The invention relates to the utilization of peat, in particular to a powder activated carbon prepared from peat as raw material. [0002] The invention also relates to a method for preparing powdered activated carbon with peat as raw material. Background technique [0003] Activated carbon is a porous carbon material obtained by carbonization and activation using charcoal, sawdust, coconut shell, various fruit stones, pulp waste liquid and other agricultural and forestry by-products such as biomass, coal and heavy petroleum as raw materials. Activated carbon has a developed pore structure and a large specific surface area. As one of the oldest and most important industrial adsorbents, compared with other adsorbents (resin, silica gel, zeolite, etc.), it has good chemical stability and acid resistance. , alkali resistance, high temperature resistance and many other characteristics. It has a variety of oxygen-containing functional groups on its surface...

AI Technical Summary

Problems solved by technology

However, as the traditional raw materials for the production of activated carbon, wood and coal can no longer meet the industrial demand for activated carbon applications.

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