Granular activated carbons are one of the most extensively utilized and adaptable types of activated carbon available.
Granular activated carbon (GAC) is a high-purity type of carbon with a large surface area that is employed in numerous purification applications in both the liquid and gas phases. Granule particle sizes generally range from roughly 0.2mm to 5mm, with the mesh size' chosen based on the desired end-use for the material. Powder activated carbon (or PAC) is defined as particles less than 0.2mm in size. The other basic physical form of activated carbon is the extruded pellet, which is a homogeneous cylinder of carbon with a diameter of 3 or 4mm.
Granular activated carbon is commonly made from bituminous coal, coconut shells, or specific wood species. Each raw material produces granular activated carbon with somewhat varied physical qualities in terms of purifying performance; therefore, the decision is influenced once again by the end-user in mind.
The surface of granular activated carbon is made up of minute holes and channels known as pores, which can only be seen with a high-powered microscope. It is because of these holes that it has such a large surface area—a teaspoon of granular activated carbon has the same surface area as a football field!
When polluted fluid flows through a filtering system containing granular activated carbon, the impurities are retained inside the pores, enabling the cleansed fluid to pass through. Granular activated carbon is commonly used to remove taste, odor, and color from drinking water, as well as traces of other dissolved pollutants such as pesticides and herbicides.
One of the primary benefits of employing granular activated carbon for fluid purification rather than powder activated carbon is that granular activated carbon may be recovered for reuse through a process known as thermal reactivation. Carbon that has been spent, that is, the pores have been clogged with pollutants and the treatment goal is no longer being met, can be run through a high-temperature kiln. The contaminating molecules are driven out of the pores and destroyed, leaving a reactivated granular activated carbon ready for use in the customer's process again and again.
At its location in Immingham, NE Lincs, CPL Activated Carbons maintains two independent state-of-the-art reactivation kilns, one dedicated to treating wasted carbons from drinking water and food-grade end-users, and the other for industrial applications such as wastewater treatment and biogas purification.
Recycling granular activated carbon in this manner not only saves money but also has significant environmental advantages, with a CO2 footprint savings of more than 90% when compared to the usage of new 'virgin' material.
Tongke Activated Carbon is a prominent provider of high-quality Tongke granular activated carbons in China. We provide a wide selection of grades with varying particle sizes and raw materials, and our team of experienced technical specialists will assist clients in selecting the best grade for their specific process. With hundreds of grades available and a wide range of purification applications, technical support is critical to ensuring clients choose the most cost-effective and suitable solution for their purification difficulties.
Please contact us if you have any questions about our Tongke granular activated carbon goods or associated services.