Useful Knowledge About Activated Carbon

WHAT IS ACTIVATED CARBON?

Activated carbon (also called activated charcoal, activated coal or active carbon) is definitely a useful adsorbent. This can high surface area, pore structure (micro, meso and macro), and high level 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 a lot of industries like water purification, food-grade products, cosmetology, automotive applications, industrial gas purification, petroleum and precious metal recovery mainly for gold. The base materials for activated carbons are coconut shell, coal or wood.

Using ACTIVATED CARBON

Different types 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 depends upon the approval and contaminants you intend to eliminate.

Typical applications are:

Removing chemical toxins including Benzene, TCE, and PCE.
Hydrogen Sulfide (HS) and removing waste gases
Impregnated activated carbon utilized as a bacteria inhibitor in mineral water filters
Removal of taste and odor causing compounds like MIB and geosmin
Recovery of gold
Removal of chlorine and chloramine
Designing an appropriate activated carbon filtering with plenty contact time, pressure drop, and vessel dimension is important. Also, activated carbon’s physical and chemical characteristics play a huge role in removing contaminants effectively. Therefore, material tests are essential and ASTM test methods such as butane activity, surface, density, and water content (moisture) can be carried out to find the best suitable material on your application.

TYPES OF ACTIVATED CARBON

Coconut shell-based activated carbon

Ab muscles large internal surface areas seen as microporosity in addition to high hardness and low dust make these coconut shell carbons particularly attractive for water and significant air applications in addition to point-of-use water filters and respirators

High area seen as an a large proportion of micropores
High hardness with low dust generation
Excellent purity, with most products exhibiting no more than 3-5% ash content.
Renewable and green raw material.

Coal-based activated carbon

It generates different performance characteristics in industrial applications typically catered to with coal or coconut products.

Wood based activated carbon has a high surface seen as both mesopores and micropores and it has excellent decolorizing properties as a result of its signature porosimetry

Catalytic based activated carbon

Catalytic carbon is often a type of activated carbon employed to remove chloramines and hydrogen sulfide from normal water.

It’s got all of the adsorptive characteristics of conventional activated carbons, and also the ability to promote chemical reactions.

Catalytic carbon isn’t impregnated with caustic chemicals
Because catalytic carbons have no impregnates, you won’t need to panic about reduced organic odor capacity or even the higher bed fire potential of the impregnated carbons.

Catalytic carbon is made by altering the surface structure of activated carbon. It is modified by gas processing at high temperatures to change the electronic structure and build the highest amount of catalytic activity on carbon for reducing chloramine and H2S in water. This added catalytic functionality is much in excess of that within traditional activated carbons. Catalytic carbon can be an economical strategy to treat H2S levels up to Twenty to thirty ppm. Catalytic carbon converts adsorbed H2S into sulfuric acid and sulfurous acid that are water soluble, so carbon systems can be regenerated with water washing to revive H2S capacity for more uncommon physical change-outs.

Relatively low density
Renewable method to obtain raw material

Impregnated Activated Carbon

Surface impregnation chemically modifies activated carbon through a fine distribution of chemicals and metal particles for the internal surfaces of the pores. This greatly improves the carbon’s adsorptive capacity by way of a synergism between your chemicals as well as the carbon. And offers a cost-effective way to remove impurities from gas streams which may otherwise not possible.

Water treatment
Due to 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 used to treat 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 for example arsine and phosphine. Carbon impregnated with metal-oxide targets inorganic gases including HCN, H2S, phosphine and arsine.

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