Essential Specifics About Activated Carbon
What’s ACTIVATED CARBON?
Activated carbon (also known as activated charcoal, activated coal or active carbon) is an extremely useful adsorbent. Due to their high area, pore structure (micro, meso and macro), and high degree of 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 several industries such as 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 designed for various specialized applications.
Granulated activated carbon
Pelletized activated carbon
Powdered activated carbon
Impregnated activated carbon
Catalytic activated carbon
Each grade and sized activated carbon is application specific. Deciding on the correct activated carbon product and mesh size depends upon the applying and contaminants you want to remove.
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 mineral water filters
Elimination of taste and odor causing compounds such as MIB and geosmin
Recovery of gold
Removing chlorine and chloramine
Designing an appropriate activated carbon filtration system with plenty of contact time, pressure drop, and vessel dimensions are important. Also, activated carbon’s physical and chemical characteristics play an important role in removing contaminants effectively. Therefore, material testing is essential and ASTM test methods such as butane activity, area, density, and water content (moisture) can be accomplished to find the best suitable material to your application.
Kinds of ACTIVATED CARBON
Coconut shell-based activated carbon
The very large internal surface areas seen as a microporosity along with high hardness and low dust make these coconut shell carbons particularly attractive for water and critical air applications and also point-of-use water filters and respirators
High floor seen as the great majority of micropores
High hardness with low dust generation
Excellent purity, generally products exhibiting only 3-5% ash content.
Renewable and green raw material.
Coal-based activated carbon
It makes different performance characteristics in industrial applications typically focused on with coal or coconut products.
Wood based activated carbon includes a high floor seen as an both mesopores and micropores and contains excellent decolorizing properties due to its signature porosimetry
Catalytic based activated carbon
Catalytic carbon can be a sounding activated carbon used to remove chloramines and hydrogen sulfide from normal water.
It’s got every one of the adsorptive characteristics of conventional activated carbons, as well as the capability to promote chemical reactions.
Catalytic carbon is not impregnated with caustic chemicals
Because catalytic carbons don’t have any impregnates, you won’t need to panic about reduced organic odor capacity or the higher bed fire potential of the impregnated carbons.
Catalytic carbon is created by altering the surface structure of activated carbon. It is modified by gas processing at high temperatures to change the electronic structure and create the highest degree of catalytic activity on carbon for reducing chloramine and H2S in water. This added catalytic functionality is much more than that found in traditional activated carbons. Catalytic carbon is definitely an economical treatment for treat H2S levels as high as 20 or 30 ppm. Catalytic carbon converts adsorbed H2S into sulfuric acid and sulfurous acid which can be water soluble, so carbon systems may be regenerated with water washing to bring back 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 the pores. This greatly enhances the carbon’s adsorptive capacity by way of a synergism involving the chemicals as well as the carbon. And offers a cost-effective strategy to remove impurities from gas streams which could otherwise not be possible.
Water treatment
Because of its antimicrobial/antiseptic properties, silver-impregnated carbon is an excellent adsorbent for purification in earth-bound domestic along with other water systems.
Gas purification
Impregnated activated carbon is employed to deal with flue gases in coal-fired generation plants along with other smog control applications. Carbon could be specifically impregnated for removing acid gases, ammonia and amines, aldehydes, radio-active iodine, mercury and inorganic gases including arsine and phosphine. Carbon impregnated with metal-oxide targets inorganic gases including HCN, H2S, phosphine and arsine.
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