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

A technology of powdered activated carbon and peat, which is applied in the field of powdered activated carbon and powdered activated carbon preparation, which can solve the problems that cannot meet the needs of activated carbon application, achieve energy saving and time saving, realize large-scale industrial production, and shorten the preparation time.

Active Publication Date: 2015-07-01
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Abstract
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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.

Method used

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

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Embodiment Construction

[0029] The method for preparing powdered activated carbon with peat as a raw material in the present invention includes steps such as washing / sieving, drying / crushing, impregnation, carbonization / activation, grinding, pickling / suction filtration, drying / sieving, as follows:

[0030] 1) Take a certain amount of peat, wash it with clean water, and sieve it to remove sand-like solids and various sundries; peat is pure natural organic peat soil formed by fiber plants in low-lying land and black brown powder with plant rhizomes The peat soil of the residue has a water content of 61.0% by weight; a total organic matter content of 76.0% and a humic acid content of 15-30%; pH=4.8;

[0031] 2) Put 20 g of peat obtained in step 1 into an oven with a set temperature of 120° C., dry it for 12 hours, take it out and pulverize it in a crucible to facilitate impregnation and set aside;

[0032] 3) Put the peat obtained in step 2 in a ratio of 4:1 to anhydrous sodium carbonate, put the peat i...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/12
Inventor 陈求稳罗明汉徐强马金峰李若男李国良
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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