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  • Activated Carbon is the generic term used to describe a family of carbonaceous adsorbents with a highly crystalline form and an extensively developed internal pore structure. Many types of activated carbon products are available, each exhibiting markedly different characteristics depending upon the raw material and activation technique used in their production.

  • •    Surface area (BET N2) - Measurement, using nitrogen (N2), of the extent of the pore surface developed within the matrix of the activated carbon. Used as a primary indicator of the activity level, based on the principle that the greater the surface area, the higher the number of adsorptive sites available.

    •    Pore size distribution - Determination of the pore size distribution of an activated carbon is an extremely useful way of understanding the performance characteristics of the material. The International Union of Pure and Applied Chemistry (IUPAC) defines the pore size distribution as:

    Micropores: r < 1nm
    Mesopores: 1 < r < 25nm
    Macropores: r > 25nm

     •    The macropores are used as the entrance to the activated carbon, the mesopores for transportation, and the micropores for adsorption.

     

  • •    Hardness - An important factor in system design, filter life and product handling. There are large differences in the hardness of activated carbons, depending on the raw material and activity level.
    •    Bulk Density -Should be carefully considered when filling fixed volumes as it can have considerable commercial implications.
    •    The backwashed and drained density will show a lower value due to the water film between the particles of activated carbon.
    •    Particle size distribution - The finer the particle size of an activated carbon, the better the access to the surface area and the faster the rate of adsorption kinetics. In vapour phase systems this needs to be considered against pressure drop, which will affect energy cost. Careful consideration of particle size distribution can provide significant operating benefits.

  • Activated carbon is a broad spectrum adsorbent. It is a versatile product which can be used in many diverse applications, including water treatment, air and gas treatment, gold recovery, and edible oil purification. Activated carbon utilises its natural porosity in conjunction with Van der Waals forces as an adsorbent, catalyst, or substrate.

  • Activated carbon will trap carbon based (organic) impurities, as well as certain chemicals like chlorine. Some chemicals like sodium’s and nitrates, are not attracted to carbon, and will pass through the filter unhindered.  An activated carbon filter will therefore remove certain impurities and ignore others. As soon as all the pores are filled, the filter will need to be replaced.

  • Our activated carbon is manufactured from specially selected grades of coal, wood, and coconut shell.

  • CPL Carbon Link specialises in the use of steam activation for the production of coconut shell and coal based activated carbons. The use of stringently controlled manufacturing techniques results in highly porous carbons with highly developed surface areas.

  • Adsorption is a process by which a substance in a gas or liquid becomes attached to a solid via chemical attraction. Adsorption occurs naturally, but industrialists have perfected adsorption methods to clean up hazardous waste, or to purify drinking water.

  • Based on naturally occurring raw materials with a highly crystalline form and extensively developed internal pore structure, activated carbons are excellent adsorbents for use across a wide range of contaminants. They are comparatively low in cost and are effective adsorbents in air, liquid and gaseous phase applications. They are also re-usable after reactivation, non-hazardous and safe to use.

  • Regenerated carbon is an activated carbon product which has been thermally treated to remove previously adsorbed contaminants. The product is screened and analysed to the same standards as virgin carbon.

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