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Carbon-based adsorbents exhibit strong adsorption capabilities for low-concentration SO_2, and thus exhibit high-efficiency removal performance of SO_2 from exhaust gas. This study aims to further imp...rove the SO_2 adsorption capacity of pitch-based activated carbon fiber (ACF) through controlled oxidation. Pristine ACF (PACF) and Fe-impregnated ACF (FeACF) were oxidized using low-concentration oxygen gas (2 % O_2 in N_2). The results showed that the oxidation of ACFs using low concentration O_2 increased the contents of oxygen-containing surface functional groups, and the oxidation of ACFs followed by heat treatment increased the specific surface area and widened the pore size. The adsorption capacity of PACF was 150.8 mL/g-ACF. Oxidization of FeACF at 450 °C for 1 hour and heat treatment at 1100 °C increased the SO_2 removal capacity, reaching 491.0 mL/g-ACF.続きを見る
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