Removal of SO_2 from O_2-containing flue gas by activated carbon fiber (ACF) impregnated with NH_3

摘要

Adsorption of SO_2 from the O_2-containing flue gas by granular activated carbons (GACs) and activated carbon fibers (ACFs) impregnated with NH_3 was studied in this technical note. Experimental results showed that the ACFs were high-quality adsorbents due to their unique textural properties. In the presence of moisture, the desulphurization efficiency for the ACFs was improved significantly due to the formation of sulfuric acid. After NH_3 impregnation of ACF samples, nitrogen-containing functional groups (pyridyl C_5H_4N- and pyrrolyl C_4H_4N-) were detected on the sample surface by using an X-ray photoelectron spectrometer. These functional groups accounted for the enhanced SO_2 adsorption via chemisorption and/or catalytic oxidization.