Activated carbon is a kind of black porous solid carbon, which is made from coal by pulverizing, forming or using uniform coal pellets. The main components are carbon and contain a small amount of oxygen, hydrogen, sulfur, nitrogen and chlorine. The surface area of normal activated carbon is between 500 and 1700m squared/g. It has a strong adsorption capability and is a widely used industrial adsorbent。

The action of activated carbon cannot be ignored. Is mainly used for harmful gas adsorption, activated carbon filter to insoluble, adsorption some soluble. The components of activated carbon is mainly use charcoal, all kinds of fruit shell and high quality coal as raw materials, by physical and chemical methods for raw material crushing, sieving, catalyst activation, rinsing, drying and screening and a series of process. Activated carbon is also known as active carbon black. A black powder or granule amorphous carbon. Active carbon has oxygen, hydrogen and other elements besides carbon. This is the reason that activated carbon is hydrophobic adsorbent. In the activated carbon in addition to the carbon element, also contains two kinds of admixture: one kind is the combination of chemical elements, mainly of oxygen and hydrogen, these elements are due to incomplete carbonized residues in charcoal, or in the process of activation, exotic carbon and activated carbon surface chemistry, such as by steam activation, or water vapor oxidation surface oxidation active carbon; The other kind of admixture is ash, it is the inorganic part of activated carbon, the element composition of several activated carbon, easy to cause secondary pollution. Activated carbon is made up of 80% - 90% of the elements, which is the reason why the activated carbon is hydrophobic adsorbent. Activated carbon in addition to carbon, also contains two kinds of admixture: one kind is the combination of chemical elements, mainly of oxygen and hydrogen, these elements are due to incomplete carbonized residues in charcoal, or in the process of activation, the outside to the carbon and activated carbon surface chemistry, such as by steam activation, or water vapor oxidation surface oxidation active carbon; Another kind of admixture is ash, it is the inorganic part of a ctivated carbon, the element composition of several activated carbon。