China Suppliers Activated Carbon

Activated carbon
Activated carbon (also called active carbon, activated charcoal, or activated coal) is a form of carbon that has been processed to make it extremely porous and thus to have a very large surface area available for adsorption and chemical reactions. It is usually derived from charcoal.
Activated carbon is valuable for a variety of applications. Examples include gas purification, water purification, metal extraction, gold recovery, medicine, sewage treatment, air filters in gas masks and filter masks, and filters in compressed air. In addition, activated carbon is useful for the deodorization of closed spaces such as refrigerators and warehouses. Sufficient activation for useful applications may come solely from the high surface area, though further chemical treatment often enhances the adsorption ability of the material.
COConUT SHELLANTHRACITE COALWOODIodine value(mg/g)600-1200450-1050500-1000Moisture(%)<8<5<8ASH(%)<3<6<5Bulk density(g/cm3)450-580500-650380-500Hardness(%)>95>92>90PH4-78-115-8Production
Activated carbon is produced from carbonaceous source materials like nut shell,coconutshells, wood, and coal. It can be produced by one of the following processes:
Physical reactivation: The precursor is developed into activated carbons using gases. This is generally done by using one of or combining the following processes:
Carbonization: Material with carbon content is pyrolysed at temperatures in the range 600-900 °C, in absence of air (usually in inert atmosphere with gases like argon or nitrogen)
Activation/Oxidation: Raw material or carbonised material is exposed to oxidizing atmospheres (carbon dioxide, oxygen, or steam) at temperatures above 250 °C, usually in the temperature range of 600-1200 °C.
Chemical activation: Impregnation with chemicals such as acids like phosphoric acid or bases like potassium hydroxide, sodium hydroxide or salts like zinc chloride, followed by carbonization at temperatures in the range of 450-900 °C. It is believed that the carbonization / activation step proceeds simultaneously with the chemical activation. This technique can be problematic in some cases, because, for example, zinc trace residues may remain in the end product. However, chemical activation is preferred over physical activation owing to the lower temperatures and shorter time needed for activating material.Extruded activated carbon (EAC)Consists of extruded and cylindrical shaped activated carbon with diameters from 0.8 to 45 mm. These are mainly used for gas phase applications because of their low pressure drop, high mechanical strength and low dust content.
AnalysisIndexAnalysisIndexIodine Value500-1100mg/gFilling density0.38-0.55g/cm3Surface Area>1000m²/gStrength92%minTotal pore volume0.9cm3/gMoisture8% or lessCTC50%-85%PH value5-9Ash content<5%Fire point500°CApplications
Activated carbon is used in gas purification, gold purification, metal extraction, water purification, medicine, sewage treatment, air filters in gas masks and filter masks, filters in compressed air and many other applications.
One major industrial application involves use of activated carbon in metal finishing field. It is very widely employed for purification of electroplating solutions. For example, it is a main purification technique for removing organic impurities from bright nickel plating solutions. A variety of organic chemicals are added to plating solutions for improving their deposit qualities and for enhancing properties like brightness, smoothness, and ductility. Due to passage of direct current and electrolytic reactions of anodic oxidation and cathodic reduction, organic additives generate unwanted break down products in solution. Their excessive build up can adversely affect the plating quality and physical properties of deposited metal. Activated carbon treatment removes such impurities and restores plating performance to the desired level.
Environmental applications
Carbon adsorption has numerous applications in removing pollutants from air or water streams both in the field and in industrial processes such as:
Spill cleanup
Groundwater remediation
Drinking water filtration
Air purification
Volatile organic compounds capture from painting, dry cleaning, gasoline dispensing operations, and other processes
Frequently Asked QuestionsHow Do I Use Activated Carbon?
Carbon is typically used in a column contactor. The columns are called adsorbers and are designed specifically for air and water. The design is engineered for loading (amount of fluid per area cross section), contact time (a minimum contact time is needed to insure required removal) and pressure drop through the adsorber (needed to size container pressure rating and fan/pump design rating). The standard General Carbon adsorbers are pre-engineered to meet all of the requirements for good adsorber design. We can also design special designs for applications outside the normal range.
How Long Does Activated Carbon Last?
Carbons capacity for chemicals depends on many things. The molecular weight of the chemical being removed, the concentration of the chemical in the stream being treated, other chemicals in the treated stream, operating temperature of the system and polarity of the chemicals being removed all affect the life of a carbon bed. Your General Carbon representative will be able to provide you with an expected operating life based on the amounts and chemicals in your stream.
Which Carbon filter is best for me?
There are several kinds of activated carbon filters and determining which filter will work best for you is actually not that complicated. If you would like to learn more about the proper treatment of your application, our technicians are more than willing to find a solution. Please contact us for more information through this process.