WHAT IS ACTIVATED CARBON?
Activated carbon (also known as activated charcoal, activated coal or active carbon) is definitely a useful adsorbent. This can high surface, pore structure (micro, meso and macro), and high a higher level surface reactivity, activated carbon can be used to purify, dechlorinate, deodorize and decolorize both liquid and vapor applications. Moreover, activated carbons are economical adsorbents for a lot of industries like water purification, food grade products, cosmetology, automotive applications, industrial gas purification, petroleum and rare metal recovery mainly for gold. The beds base materials for activated carbons are coconut shell, coal or wood.
Putting on ACTIVATED CARBON
Various kinds of activated carbon are fitted to various specialized applications.
Granulated activated carbon
Pelletized activated carbon
Powdered activated carbon
Impregnated activated carbon
Catalytic activated carbon
Each grade and size activated carbon is application specific. Choosing correct activated carbon product and mesh size is determined by the approval and contaminants you plan to eliminate.
Typical applications are:
Eliminating chemical toxins including Benzene, TCE, and PCE.
Hydrogen Sulfide (HS) and removal of waste gases
Impregnated activated carbon utilized as a bacteria inhibitor in h2o filters
Eliminating taste and odor causing compounds for example MIB and geosmin
Recovery of gold
Removal of chlorine and chloramine
Designing an appropriate activated carbon filtration system with enough contact time, pressure drop, and vessel dimensions are important. Also, activated carbon’s physical and chemical characteristics play a huge role in removing contaminants effectively. Therefore, material testing is essential and ASTM test methods like butane activity, floor, density, and water content (moisture) can be carried out for top level suitable material for the application.
Kinds of ACTIVATED CARBON
Coconut shell-based activated carbon
The very large internal surface areas seen as microporosity together with high hardness and occasional dust make these coconut shell carbons particularly attractive for water and significant air applications along with point-of-use water filters and respirators
Extremely high area characterized by a large proportion of micropores
High hardness with low dust generation
Excellent purity, with most products exhibiting a maximum of 3-5% ash content.
Renewable and green raw material.
Coal-based activated carbon
It makes different performance characteristics in industrial applications typically catered to with coal or coconut products.
Wood based activated carbon has a high surface area characterized by both mesopores and micropores and contains excellent decolorizing properties owing to its signature porosimetry
Catalytic based activated carbon
Catalytic carbon is often a sounding activated carbon employed to remove chloramines and hydrogen sulfide from h2o.
It’s every one of the adsorptive characteristics of conventional activated carbons, as well as the capability to promote chemical reactions.
Catalytic carbon just isn’t impregnated with caustic chemicals
Because catalytic carbons have zero impregnates, you won’t have to worry about reduced organic odor capacity or the higher bed fire potential with the impregnated carbons.
Catalytic carbon is created by altering the counter structure of activated carbon. It can be modified by gas processing at high temperatures to improve the electronic structure and build the highest level of catalytic activity on carbon for reducing chloramine and H2S in water. This added catalytic functionality is really a lot in excess of that within traditional activated carbons. Catalytic carbon can be an economical solution to treat H2S levels as high as Twenty or thirty ppm. Catalytic carbon converts adsorbed H2S into sulfuric acid and sulfurous acid which are water soluble, so carbon systems may be regenerated with water washing to regenerate H2S capacity for less frequent physical change-outs.
Relatively low density
Renewable method to obtain raw material
Impregnated Activated Carbon
Surface impregnation chemically modifies activated carbon by way of a fine distribution of chemicals and metal particles on the internal surfaces of its pores. This greatly improves the carbon’s adsorptive capacity by having a synergism relating to the chemicals and the carbon. And offers a cost-effective approach to remove impurities from gas streams which could otherwise not possible.
Water treatment
Due to its antimicrobial/antiseptic properties, silver-impregnated carbon is an efficient adsorbent for purification in earth-bound domestic as well as other water systems.
Gas purification
Impregnated activated carbon is employed to help remedy flue gases in coal-fired generation plants as well as other smog control applications. Carbon may be specifically impregnated for removing acid gases, ammonia and amines, aldehydes, radio-active iodine, mercury and inorganic gases such as arsine and phosphine. Carbon impregnated with metal-oxide targets inorganic gases including HCN, H2S, phosphine and arsine.
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