Applications

Areas of Applications

SENTA OVERSEAS provides a comprehensive range of standard, washed, and impregnated activated carbon, available in extruded and powdered forms. Our high-quality carbon is designed for diverse applications, including water treatment, air purification, gold recovery, and the food & beverage industry, as well as specialized uses such as cigarette filters, cabin air filtration, and solvent recovery. Meeting the highest industry standards, SENTA OVERSEAS’s activated carbon effectively removes pollutants, contaminants, and impurities from water, air, and beverages, ensuring superior performance across all applications.

Gold Recovery

SENTA OVERSEAS offers a highly microporous coconut shell based activated carbons with intrinsic hardness and excellent attrition resistance for gold recovery application, manufactured with very low platelet content and nil dust. SENTA OVERSEAS GC grades of carbon are manufactured specifically for use in gold recovery applications from the highest quality coconut shell under stringent control to provide ultimate hardness and attrition resistance, whilst providing the best adsorption properties. Our GC range products are processed through a vee-wire screen and de-dusted to minimize the proportion of platelets and fines in the final product. Our carbons have superior adsorption kinetics with very high gold adsorption rates and loading capacities.

  • Advantages
  • Superior hardness to minimize attrition loss and dust
  • Higher gold adsorption capacities for maximum gold loading
  • Excellent gold adsorption rates for high throughput

Air & Gas

Activated carbon plays an integral role in purifying indoor air quality and also outdoors with gas masks, filters etc. Air filtration applications require activated carbon grades featuring excellent hardness characteristics and high retentivity. Coconut shell-based activated carbons with their extreme hardness and large microporous structure are the carbon of choice for this type of service. The carbon shapes and particle sizes used vary with the filter media. Whether you are working to meet emission regulations to protect the environment and human health, controlling emissions, or reducing harmful or nuisance odours, SENTA OVERSEAS offers a variety of activated carbon products to help address your needs. Respirators and gas masks containing SENTA OVERSEAS VP granular activated carbon filters are used to provide protection against acid gases, organic vapors, ammonia, mercury vapor, formaldehyde and radioactive iodides (RADI). Our carbons are used in air filtration devices such as filters and adsorbers for Indoor Air Quality (IAQ), Cabin Air Filtration (CAF) and Emission/Odor Control (EOC) applications. Other applications include industrial environments such as mines, chemical facilities, nuclear power stations and manufacturing plants. Impregnated carbons are used in gas masks to protect civilian and military environments against chemical warfare gases.

  • Cabin Air filtration
  • Protection equipment including gas masks
  • Indoor air quality
  • Treatment of flue gas
  • Emission & Odour Control

Cigarette Filters

Cigarette smoke contains a number of compounds identified as irritants and possibly toxic chemicals to humans. In order to reduce the intake of toxic gases while smoking cigarettes, filters made up of cellulose acetate is used worldwide. Cigarette filters incorporated with activated carbon are well known for their selective reduction of many vapour phase smoke toxicants. Coconut shell activated carbon provides superior performance in terms of smoke chemistry removal efficiency and handling characteristics. SENTA OVERSEAS CF grade activated carbon is an excellent choice as it provides superior performance in terms of removal of irritation causing components like acetaldehyde & acrolein and modifies the perceived taste and flavor of cigarettes. The tailormade particle size distributions of these products ensures high kinetics, whilst the low dust and fine particle content prevents the contamination and discoloration of filters, and prevents contaminant leakages. Our activated carbons products greatly increase the retention of a wide range of vapor phase, semi volatile as well as low molecular weight contaminants in cigarette smoke including aldehydes, cyanides, ketones, hydrocarbons and pyridine among many others.

Oil & Gas

SENTA OVERSEAS offers industry-leading activated carbon products for a wide range of oil and gas industry. Activated Carbon is used for the recovery of economically valuable products like gasoline vapours, benzene and solvents at petroleum refineries. Activated Carbon is the best adsorbent for removal of hydrogen sulphide gas (H2S) during oil refining. Water used, as condensate boiler feed in refineries require very high purification standards and our O&G grade of treated activated carbons successfully remove these various contaminants, de-oiling the condensate and purifying the water flow, thus effectively protecting the ion exchange resins and other sensitive equipment from damage and deterioration. Silica which is a common fouling agent in regular activated carbon products damage ion exchange resins, boiler tubes and turbine blades in refineries. SENTA OVERSEAS O&G grade of carbon products for boiler feed water treatment are designed to have the lowest silica leach and nil ash level in the industry resulting in significant improvement of machinery lifetime and reduction of maintenance costs.

  • SENTA OVERSEAS advantages.
  • Lowest level of silica leaching.
  • Low ash content and nil dust.
  • No pre-washing of filter beds required.
  • High hardness and attrition resistance.

STEAM ACTIVATED CARBON FROM
COCONUT SHELL

  • Coconut Shell based Activated Carbon

Coconut shell carbons tend to have much higher pore volume in the micro-porous region and a slightly lower pore volume in the macro-porous region. This is because coconut char is less amorphous (harder, more crystalline-like) than coal. The result is that coconut-based carbons adsorb smaller organic molecules such as Chloroform & other Trihalomethanes (THMs), Trichloroethylene (TCE), Carbon Tetrachloride and MTBE (Methyl Tertiary Butyl Ether) while coal-based carbons more effectively remove larger molecules such as colour-producing compounds (tannins & humics). The predominance of micropores in coconut shell carbon gives it tight structure, provides good mechanical strength & hardness and enables high resistance to attrition or wearing away by friction.

In addition, because of the high energy of adsorption of the coconut-based carbon’s micropores, once the smaller organic molecules are adsorbed, they’re very tightly retained. Therefore, coconut shell carbons in general have a higher retentivity for these types of contaminants than do other types of carbons. For these reasons, coconut shell carbons are often selected for drinking water treatment where contamination is attributed to organic solvents or disinfection by-products such as THMs. Another advantage of coconut shell carbon is that it’s typically harder and attrition resistant than coal, lignite and peat-based carbons. This can be important in applications where attrition, carbon breakage and dust cannot be tolerated, like gold refining, gas masks and ultrapure water treatment applications.

SENTA OVERSEAS products are made from selected shells of coconut to ensure the highest quality during manufacturing process.

  • Process and Production Stages
Activated carbon is produced from coconut shells (other common raw material sources are wood, lignite, saw dust, peat, coal, petroleum residues etc. by a two-step process.

The First step in activation is to carbonize the shells to drive out about two thirds of the volatiles out of the shells creating carbonaceous mass which contains minimum 75% fixed carbon.

This carbonized base material in the second stage is activated at high temperature (850 – 900 degree) in presence of steam.

The charring process (making of charcoal) is known as the pyrolysis, which is chemical decomposition of the shell by heating in the absence of oxygen.

During the carbonization of coconut shells, volatiles amounting to 2/3rd of the mass of coconut shells on dry weight basis are released, yielding 1/3rd of the coconut shell mass of charcoal.

Carbon is then activated by a carefully controlled oxidation process in presence of steam. This results in high degree of porosity and over a broad range of pore sizes with good hardness. The specific structure of carbon gives a very large surface area which allows the carbon to adsorb a wide range of compounds. Entire activation process is without any chemical additives & fugitive emissions

SENTA OVERSEAS production facility in India has the capability to carefully control particle size distribution, adsorption capacity and other critical carbon properties as required by our customers.

Salient Features
Higher ADSORPTION & HARDNESS

Sizes Available
4 mesh – 325 mesh (Standard USS mesh)

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