Activated coal is also known as activated carbon black.It is an amorphous carbon black powder or granular, massive, honeycomb, it also has a regular array of carbon crystal.In addition to elemental carbon, activated coal also contains two types of admixture: a class is combined with chemical elements, mainly oxygen and hydrogen.These elements is due to incomplete carbonization residue in carbon, or in the activation process, foreign non carbon elements and activated carbon surface chemical binding, such as water vapor activation, the surface of activated coal by oxidation or steam oxidation; another kind of admixture is ash, it is the inorganic part of activated carbon; ash in activated carbon could easily lead to secondary pollution.
What is the composition of the activated coal?
In the elemental composition, activated coal above 80%-90% is composed of carbon, which is the reason for the hydrophobic active carbon adsorbent.In addition to the elemental carbon, activated carbon also contains two types of admixture: a class is combined with chemical elements, mainly oxygen and hydrogen. These elements is due to incomplete carbonization residue in carbon, or in the activation process, non carbon elements and activated carbon surface chemistry to binding, such as water vapor activation, the surface of activated carbon by oxidation or steam oxidation; another kind of admixture is ash, it is the inorganic part of activated coal, consisting of several kinds of activated coal elements. With the continuous development of activated carbon industry, more and more industries and enterprises to use the activated carbon, there are also some enterprises to enter the active coal industry.
The main raw material of activated coal can be almost all carbon who has rich organic materials, such as coal, wood, shell, coconut shell, walnut shell, apricot and jujube shell and. The activation of carbon materials in the furnace, under high temperature and pressure through pyrolysis is converted into activated carbon. In the activation process, huge surface area and pore structure of the complex formed gradually, and so-called adsorption process is in the pores and on the surface of, the activated carbon pore size of adsorbent has selective adsorption role. This is due to the large molecules cannot enter smaller than its pore pore size distribution of activated carbon for the sake of activated carbon is dominated by the carbon containing material as raw material, after high temperature carbonization and activation of the hydrophobic adsorbent.