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WHAT IS ACTIVATED CARBON?
Is a carbonaceous adsorbent with high porosity, and hence a large surface area. It mainly consists of carbon element, and a few of hydrogen, nitrogen, oxygen and moisture. Its structure is pilled up by hex collar elementary carbon, which is distributed irregularly. Just this unique internal porous structure creates activated carbon’s micro porous and highly development surface area characteristic. It is tasteless, not smell, not be dissolved in water and in organic solvent.
Approximately, a quite big micro porous volume is 0.6 ~ 0.8 ml/g, the proportional surface area is 500 ~ 1,500 m²/g, which can easily adsorb the organic high polymer. And, its outstanding properties can remove the tiny ingredient of the pigment and the ozone from liquid.
Its highly development porous structure is a kind of excellent absorbencies. Each gram of absorbed activated carbon’s area is equal to around eight tennis courses’ area. This unique characteristic comes through physical adsorption and chemical adsorption.
Activated carbon is made from wood, charred hard fruit shells, fruit pits and bone. Coconut shell and coal are generally used. Basically, the activated carbon’s production has two procedures. The first one is Carbonization. Heating and drier the raw materials, there are about 80% of the organic polymer carbonated at the temperature 170 ℃ ~ 600 ℃. The second procedure is Steam Activation. This is attained by combing the steam and carbon’s chemical & physical reaction. A gas blend of CO and H2 is processed during this treatment, which will burn off all decomposed organic polymer when it is heated to be temperature 800 ℃ ~ 1000 ℃. So that is exact how activated carbon’s outstanding structure has a large surface area, highly developed porous structure and high adsorption capacity and efficiency.
The pore’s size depends on activated carbon’s raw materials. The coconut shell activated carbon’s pore size is the minimum one among all. The wood activated carbon’s pore size is the maximum one. The coal activated carbon’s pore size is between in theirs. They are particularly used in the liquid purification treatment. Such as the granular wood activated carbon is applied on urban water supplied
Activated Carbon General Specification
1. Size Distribution
Granular (mesh) : 4 x 8, 6 x 12, 8 x 30, 12 x 40, 20 x 40
COLUMN(MM) ￠ 1.5 ￠ 4 ￠ 7
Powder (mesh) : 200 - 325
2. Bulk density, g/ml : 0.4 - 0.55
3. Iodine No., mg/g : 850 - 1200
4. Methylene Blue capacity, mg/g : 150 - 250
5. C T C, % : 45 - 80
6. Benzene, % : 25 - 45
7. Hardness, % : 90 - 99
8. Moisture, % : 3 - 8
9. Ash, % : 3 - 12
10. Surface Area BET,N2, m2/g : 800 – 1300
Activated Carbon Common Uses
＊ Clean water treatment
1. The cleaning of tap water, drinking water and pure water, the removing of organic matter, hazardous materials and heavy metals, filling materials in the filtration cores of water filter.
2. Additive in the advanced treatment of pure water and tap water.
＊ Waste water treatment
1. Low gravity industry, sanitary wastewater cleaning, de-coloration, deodorization, COD degrading.
2. Wastewater cleaning, de-coloration, deodorization, removing of COD and heavy metal.
＊ Air pollution prevention
1. Air cleaning and deodorization in the areas of biochemistry, pharmaceutical industry, painting industry, underground engineering are, leather industry, animal far.
2. Air pollution prevention, removing the hazardous materials and odors in gases.
3. Cigar filters, canisters, air filtration, gas refining.
＊ Gold refining
1. The refining of gold.
＊ De-coloration treatment
1. Medicine, distillery, organic acid and inorganic industry, also used in purification and de-coloration.
2. Sugar refinery and painting industry, also used in purification and de-coloration.
＊ Deodorization treatment
1. Food preservatives, keeping nitrogen and removing nitrogen, also used as smell adsorption in refrigerators.
2. Adsorption of stack gas odor and sulfide, removing of mercury steam, reducing the generation of dioxin.
＊ Catalysis carrier
1. Catalysis or catalysis carrier in synthetic industry.
2. Carrier in the fluidization bed treatment system and floating bed treatment system.
＊ Solvent Recovery
Removing the hazardous materials and odors in gases. |
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