Activated carbon is a porous solid carbon black, the main raw material can be almost all carbon-rich organic materials, such as coal, wood, fruit shell, coconut shell,
walnut shell, etc. These carbon materials in the activation furnace, by pyrolysis under high temperature and pressure is converted into activated carbon. In the
activation process, large surface area and complicated pore structure gradually formed, and the adsorption process is conducted on the porosity and surface, the size
of the pores in the activated carbon has the effect of selective adsorption to the adsorbate, this is because the large molecules cannot enter within the activated
carbon pore size is smaller than its porosity.
A, activated carbon mechanical properties:
Size: (1) using a set of standard sieve sieve method, formed by each sieve activated carbon and stay in weight, particle size distribution.
(2) watch density or bulk density: diet gap between pore volume and particle volume per unit volume of the weight of the active carbon.
(3) bulk density and particle density: eating pore volume without gap between particles volume per unit volume of the weight of the active carbon.
(4) strength: crushing resistance of active carbon.
5] to wear: namely, wear resistance and friction resistant performance.
These mechanical properties directly affect the activated carbon applications, such as: density affects the container size; Powder coal thickness affect filtering; The
coal particle size distribution affects the fluid resistance and pressure drop; Fragmentation affects the service life of activated carbon and carbon regeneration.
Second, the chemical characteristics of activated carbon:
Activated carbon adsorption in addition to physical adsorption and chemical adsorption. Activated carbon adsorption depends on the pore structure, and depends on the
Activated carbon not only, and contains a small amount of chemical combination and functional group construction of oxygen and hydrogen, such as carbonyl and carboxyl,
phenols, lactones, quinones, ether. On the surface of oxides and complex, some derivatives from raw materials, some of them are at the time of activation, activated
after generated by air or steam. Sometimes generate surface sulphate and chloride. Raw material contained in the activation of mineral concentration to become the ash
content in the activated carbon, the main composition of ash is alkali metal and alkaline earth metal salts, such as carbonate and phosphate. The ash content can be
reduced by water or acid treatment.
Third, activated carbon to note:
1, the activated carbon in the process of transportation, prevent and hard material mix, do not step on, step, in case of carbon particle breakage, affect the quality.
2, storage should be stored in the groove adsorbent, more so in the process of transportation storage and use, will absolutely prevent water immersion, due to
flooding, after a lot of water is full of activity space, lose its effect.
3, prevent tar material in use process, should be prohibited from tar class material to the activated carbon bed, lest jam activated carbon, lose its adsorption. It is
better for decoking equipment to purify the gas.
4, fire activated carbon during storage or transportation, avoid direct contact with fire, in case of fire, into the oxygen and regeneration completely avoid when
activated carbon regeneration, regeneration after have to use steam cooling down to under 80 ℃, otherwise the temperature is high, meet oxygen, activated carbon
Four, activated carbon packing: 25 kg woven bag packaging, can be customized as required.