What exactly is ACTIVATED CARBON?
Activated carbon (also known as activated charcoal, activated coal or active carbon) is a very useful adsorbent. This can high area, pore structure (micro, meso and macro), and also a higher level surface reactivity, activated carbon enables you to purify, dechlorinate, deodorize and decolorize both liquid and vapor applications. Moreover, activated carbons are economical adsorbents for several industries including water purification, food-grade products, cosmetology, automotive applications, industrial gas purification, petroleum and rare metal recovery mainly for gold. The base materials for activated carbons are coconut shell, coal or wood.
Putting on ACTIVATED CARBON
Various kinds of activated carbon are suited to various specialized applications.
Granulated activated carbon
Pelletized activated carbon
Powdered activated carbon
Impregnated activated carbon
Catalytic activated carbon
Each grade and size of activated carbon is application specific. Choosing the correct activated carbon product and mesh size is dependent upon the application and contaminants you plan to eliminate.
Typical applications are:
Removal of volatile organic compounds like Benzene, TCE, and PCE.
Hydrogen Sulfide (HS) and removal of waste gases
Impregnated activated carbon used as a bacteria inhibitor in mineral water filters
Removal of taste and odor causing compounds such as MIB and geosmin
Recovery of gold
Elimination of chlorine and chloramine
Designing a proper activated carbon filtration with sufficient contact time, pressure drop, and vessel dimensions are important. Also, activated carbon’s physical and chemical characteristics play a vital role in removing contaminants effectively. Therefore, material exams are essential and ASTM test methods like butane activity, surface, density, and water content (moisture) can be executed to get the best suitable material for the application.
TYPES OF ACTIVATED CARBON
Coconut shell-based activated carbon
The large internal surface areas characterized by microporosity as well as high hardness and low dust make these coconut shell carbons particularly attractive for water and important air applications as well as point-of-use water filters and respirators
Very high surface seen as a the great majority of micropores
High hardness with low dust generation
Excellent purity, with a lot of products exhibiting only 3-5% ash content.
Renewable and green raw material.
Coal-based activated carbon
It produces different performance characteristics in industrial applications typically focused on with coal or coconut products.
Wood based activated carbon has a high surface seen as a both mesopores and micropores and it has excellent decolorizing properties owing to its signature porosimetry
Catalytic based activated carbon
Catalytic carbon can be a type of activated carbon accustomed to remove chloramines and hydrogen sulfide from normal water.
It’s each of the adsorptive characteristics of conventional activated carbons, along with the capability to promote chemical reactions.
Catalytic carbon isn’t impregnated with caustic chemicals
Because catalytic carbons haven’t any impregnates, you won’t worry about reduced organic odor capacity or perhaps the higher bed fire potential from the impregnated carbons.
Catalytic carbon is created by altering the surface structure of activated carbon. It can be modified by gas processing at high temperatures to change the electronic structure and make the greatest amount of catalytic activity on carbon for reducing chloramine and H2S in water. This added catalytic functionality is really a lot greater than that found in traditional activated carbons. Catalytic carbon can be an economical means to fix treat H2S levels all the way to Twenty to thirty ppm. Catalytic carbon converts adsorbed H2S into sulfuric acid and sulfurous acid that are water soluble, so carbon systems could be regenerated with water washing to bring back H2S ease of more uncommon physical change-outs.
Relatively low density
Renewable supply of raw material
Impregnated Activated Carbon
Surface impregnation chemically modifies activated carbon via a fine distribution of chemicals and metal particles for the internal surfaces of the pores. This greatly increases the carbon’s adsorptive capacity by having a synergism involving the chemicals along with the carbon. And supplies a cost-effective way to remove impurities from gas streams which will otherwise ‘t be possible.
Water treatment
Due to its antimicrobial/antiseptic properties, silver-impregnated carbon is an excellent adsorbent for purification in earth-bound domestic and other water systems.
Gas purification
Impregnated activated carbon is employed to take care of flue gases in coal-fired generation plants along with other pollution control applications. Carbon could be specifically impregnated for removal of acid gases, ammonia and amines, aldehydes, radio-active iodine, mercury and inorganic gases for example arsine and phosphine. Carbon impregnated with metal-oxide targets inorganic gases including HCN, H2S, phosphine and arsine.
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