ACTIVATED CARBON » Discussions


Granular activated carbon

  • Carrie Ge
    Host
    October 28, 2020

    How to ensure the best granular activated carbon adsorption operation?



    A basic consideration is to select the type of activated carbon that can achieve the goal of water purification and reuse. Granular activated carbon is best used for initial system startup and reactivation of used granular activated carbon.



    Standard, non impregnated, coal based materials prepared by coalescence are most commonly used in industrial applications for adsorption of organic pollutants because of their wide pore size and ability to adsorb various organic chemicals.



    The recondensed granular activated carbon can be produced by grinding the raw materials into powder, adding the binder suitable for hardness, compacting and then crushing to the specified size. Next, the material is thermally activated in a furnace using a controlled atmosphere and high heat. The product has an incredible large surface area per unit volume, and an adsorption sub microporous network occurs. Granular activated carbon has the largest adsorption porosity of any known material. Surprisingly, five grams of reconstituted carbon has the surface area of a football field. Reconstituted carbon is generally preferable to direct activation because it is a more robust material with fully developed porosity and the necessary strength to withstand use and reuse.



    In order to ensure the best adsorption operation of granular activated carbon, the equipment in the processing plant usually includes carbon adsorption equipment and related transportation pipeline. These systems can be operated using single or multi-stage vessels, depending on the treatment target required. If these steps are required, the adsorption system is usually chemically clarified and filtered, followed by disinfection.



    Activated carbon can remove many VOCs and semi volatile organic compounds in one unit operation. It is important to fully characterize the stream before analyzing the stream for active carbon purification.coconut shell activated carbon wholesale The information of the gas phase flow should include all VOC and existing gases, humidity, concentration, temperature and pressure. All these factors will affect the performance of activated carbon. Similarly, characterization of the liquid phase flow (including its ion content and distribution, type and concentration of suspended solids, and pH) is also crucial. The capacity test can measure the mass of adsorbate removed per unit weight or unit volume of activated carbon, and then the adsorption effect can be measured.