Assessement of phenanthrene removal from hot gas by porous carbons

This is the first time that the adsorption of phenanthrene (Phe) for hot ga s emissions cleaning from combustion has been studied. For this goal, the a dsorption capacity of 10 active carbons with different origins and a wide r ange of textural characteristics has been assessed for Phe removal from hot gas emissions. The study was carried out at laboratory scale and the main aim has been to test the Phe adsorption capacities by the porous materials at the ranges that Phe could be emitted from new energy systems generation. The protocol followed in this work was the following: first, to check the influence of the bed mass on the Phe adsorption capacity, and second, once it was shown that the bed mass is not relevant for the studied Phe concentr ation range, the adsorption capacity of the 10 adsorbents was analyzed. The CA-3 adsorbent was selected to check the inlet concentration at three diff erent temperatures, 125, 150, and 175 degreesC, within the range of atmosph eric emissions from the power stations. The results obtained show that ther e is a good correlation between the Phe adsorption capacity and the total m icropore volume calculated with the Dubinin-Radushkevich equation for the N -2 isotherm data. No relationship was found between Phe adsorption capacity and mesopore volume calculated by BJH method. Besides, no relationship was found between chemical surface (CO and CO2 groups desorbed on thermal prog ram desorption (TPD)) and adsorption capacity.