Columnar Activated Carbon

Column active carbon – also known as extrusion active carbon – is an exact engineered type of active carbon made by pressing the carbon paste into the mold to create homogeneous cylinder pillars, generally between 0.8 and 4 mm in diameter. Raw materials, usually charcoal, coir or wood based carbon, are mixed with adhesive, extrude into cylinder shape, and then carbonization and activation, resulting in the formation of porous structure. Controlled production procedures lead to a high degree of uniformity in geometric, density and performance across each column of a lot.

Column active carbon is characterized by geometry homogeneity. Different from the irregular grain active carbon, the cylinder type creates a high degree of orderly packing in the adsorbent container, which results in a predictable and even flow rate or gas profile, minimum flow, and steady, low-pressure-drop properties across the entire bed. This allows column active carbon to be the preferred form for gas phase sorption systems, in which a constant flow rate and minimum resistance is essential to the effectiveness and operation of the system. The smoothness of the surface and the superior mechanical strength also greatly decreases the amount of dirt and grain wear in the process of processing, filling and operating – a useful benefit in the context of sensitivity to industry and environment.