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Abstract
Incineration flue gas contains polycyclic aromatic hydrocarbons (PAHs) and sulfur dioxide (SO2). The effects of SO2 concentration (0, 350, 750, and 1000 ppm), reaction temperature (160, 200, and 280 °C), and the type of activated carbon fibers (ACFs) on the removal of SO2 and PAHs by ACFs were examined in this study. A fluidized bed incinerator was used to simulate practical incineration flue gas. It was found that the presence of SO2 in the incineration flue gas could drastically decrease removal of PAHs because of competitive adsorption. The effect of rise in the reaction temperature from 160 to 280 °C on removal of PAHs was greater than that on SO2 removal at an SO2 concentration of 750 ppm. Among the three ACFs studied, ACF-B, with the highest microporous volume, highest O content, and the tightest structure, was the best adsorbent for removing SO2 and PAHs when these gases coexisted in the incineration flue gas.
Implications
Simultaneous adsorption of sulfur dioxide (SO2) and polycyclic aromatic hydrocarbons (PAHs) emitted from incineration flue gas onto activated carbon fibers (ACFs) meant to devise a new technique showed that the presence of SO2 in the incineration flue gas leads to a drastic decrease in removal of PAHs because of competitive adsorption. Reaction temperature had a greater influence on PAHs removal than on SO2 removal. ACF-B, with the highest microporous volume, highest O content, and tightest structure among the three studied ACFs, was found to be the best adsorbent for removing SO2 and PAHs.
Additional information
Notes on contributors
Zhen-Shu Liu
Zhen-Shu Liu is an associate professor, Wen-Kai Li was a postgraduate student, and Ming-Jui Hung is an assistant professor in the Department of Safety, Health and Environmental Engineering at the Ming Chi University of Technology, New Taipei City, Taiwan.
Wen-Kai Li
Zhen-Shu Liu is an associate professor, Wen-Kai Li was a postgraduate student, and Ming-Jui Hung is an assistant professor in the Department of Safety, Health and Environmental Engineering at the Ming Chi University of Technology, New Taipei City, Taiwan.
Ming-Jui Hung
Zhen-Shu Liu is an associate professor, Wen-Kai Li was a postgraduate student, and Ming-Jui Hung is an assistant professor in the Department of Safety, Health and Environmental Engineering at the Ming Chi University of Technology, New Taipei City, Taiwan.