Activated coke is derived from coke.Īctivated carbon is used in methane and hydrogen storage, air purification, capacitive deionization, supercapacitive swing adsorption, solvent recovery, decaffeination, gold purification, metal extraction, water purification, medicine, sewage treatment, air filters in respirators, filters in compressed air, teeth whitening, production of hydrogen chloride, edible electronics, and many other applications. When derived from coal it is referred to as activated coal. These bulk sources are converted into charcoal before being 'activated'. Further chemical treatment often enhances adsorption properties.Īctivated carbon is usually derived from waste products such as coconut husks waste from paper mills has been studied as a source. An activation level sufficient for useful application may be obtained solely from high surface area. Charcoal, before activation, has a specific surface area in the range of 2.0–5.0 m 2/g. Activated is sometimes replaced by active.ĭue to its high degree of microporosity, one gram of activated carbon has a surface area in excess of 3,000 m 2 (32,000 sq ft) as determined by gas adsorption.
Activation is analogous to making popcorn from dried corn kernels: popcorn is light, fluffy, and its kernels have a high surface-area-to-volume ratio. It is processed (activated) to have small, low-volume pores that increase the surface area available for adsorption (which is not the same as absorption) or chemical reactions.
Activated carbon, also called activated charcoal, is a form of carbon commonly used to filter contaminants from water and air, among many other uses.
0 kommentar(er)
