I.The introduction of activated carbon
Activated carbon is a kind of microcrystalline carbon material with black appearance, developed internal pore structure, large specific surface area and strong adsorption capacity. It is a kind of common adsorbent, catalyst or catalyst carrier. Activated carbon according to the appearance of shape can be divided into: powder, granular, cylindrical, spherical and fiber type. According to the source of raw materials can be divided into: wood activated carbon, activated carbon shells, activated carbon raw materials, renewable activated carbon.
II.The adsorption characteristics of activated carbon
Activated carbon is a very small carbon particles, a large surface area, and carbon particles are also more small pores - capillary. This capillary has a strong adsorption capacity, due to the large surface area of carbon particles, it can make full contact with the gas. When these gases hit the capillary is adsorbed, from the purification effect.
Activated carbon catalytic properties; activated carbon mechanical properties; activated carbon chemical properties.
III.The use of activated carbon
1.Household activated carbon
① Air purification: the use of activated carbon placed in the room to absorb the effective absorption of formaldehyde in the air \ xylene and other harmful substances;
② Furniture to smell: Activated carbon can be applied to the new furniture to buy in the cabinet \ drawer \ refrigerator. Can also be placed inside the shoes smell deodorant;
③ Car addition to taste: new cars are generally contain a lot of harmful substances \ unpleasant smell pungent, with activated carbon can be effectively removed.
2.Water treatment for activated carbon
① Sewage treatment plant exhaust adsorption;
② Beverage water treatment;
③ Pretreatment of power plant water;
④ Pretreatment of wastewater recovery;
⑤ Biological wastewater treatment;
⑥ Toxic waste water treatment.
3.Gas purification dedicated activated carbon
① Toxin purification;
② Chemical products storage exhaust purification;
③ Automobile exhaust purification;
④ PTA oxidation device purification gas;
⑤ Gas separation: for example, from urban gas recovery of benzene; from natural gas recovery of gasoline, propane and butane; for the treatment of Fischer-Tropsch synthesis of waste gas to recover the hydrocarbons and so on.
4.Petrochemical alkali - free activated carbon for alcohol removal;
5.Solvent recovery;
6.Chemical catalyst carrier;
7.Gold mining special activated carbon carrier for gold extraction;
8.Sugar, alcohol, MSG medicine, food refining, bleaching;
9.Ethylene desalination water filler;
10.Impurity removal of printing ink;
11.Liquid adsorption: for example in the sugar industry with activated carbon adsorption method to decolorize sugar; in the chemical industry with activated carbon decolorization of organic materials; with activated carbon purification of organic impurities in the plating bath to ensure the quality of the plating surface and for Wastewater phenol removal.
IV.The purchase of activated carbon Note
1.Activated carbon packaging is best sealed packaging;
2.The market now appears on the counterfeit activated carbon some of the semi-finished products with activated carbon "carbonized material" to posing, carbonized material only through the "activation" process can become a real activated carbon, and activated carbon manufacturing process is the most important manufacturing pore structure the process of. The lack of carbonization of this process can be said that almost no adsorption of any material, so that consumers suffer. Charcoal material because there is no activation of pore-making process, so the surface than the activated carbon smooth, and the color white, slightly metallic luster, feel than the activated carbon hard, and the weight is also much heavier. There is a considerable part of the fake activated carbon used is a low-grade raw materials doped with diatomaceous earth firing, the carbon content is very low, most of the non-active substances, this carbon color is relatively white, feel very heavy, long particle length, Strength is also high, each collision will issue a similar ceramic knock when the crisp sound, hand break will be found on the cross section of white fine particles, we must pay attention when buying to avoid fooled.