Carbonaceous adsorbent powder

Ji et al. (1995) studied the influence of hydrophobic adsorbent (such as activated carbon) into polymeric polyether-block-polyamide (PEBA) membranes for 1,1,1-trichloroethane (TCA) removal from water by PV. It is already known, in fact, that carbonaceous adsorbents can be successfully used for the removal of small amounts of chlorinated organic compounds from water. TCA flux increases with feed concentrations (from 40 to 300 ppm) for PEBA membranes filled with both tested activated carbon WPX (a powdered adsorbent produced by Calgon Carbon Corporation, PA) and carbonaceous adsorbent Amersorb 1500 (Rohm and Hass Co., PA). The separation factor increases for membranes filled with activated carbon in comparison with unfilled membranes (axcAffl20= 1742 and 2720 for pure and PEBA membranes filled with 10 wt% activated carbon, respectively). However, membranes filled with Ambersorb 1500 do not show any improvement in the separation factor (o tca/h20= 1681). 

Activated carbons are the most widely used adsorbents in gas and liquid adsorption processes. They are manufactured from carbonaceous precursors by a chain of chemical and thermal activation processes. The temperature for carbonization and activation reaches up to 1100°C in thermal processes. Activated carbons develop a large surface area, between 500 and 2000m2g 1, and micropores with an average pore diameter <2nm. Mesoporosity and macroporosity is generated by secondary procedures such as agglomeration. The products are shaped as granules, powders and pellets depending on their application. 

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