SO2 was adsorbed, oxidized, hydrated, and recovered continuously as aq. H2SO4 at 30–100 °C on a polyacrylonitrile based active carbon fiber (PAN-ACF-FE-300). SO2 of 1000 ppm in a model flue gas was removed completely for longer than 60 h at 30 and 50 °C by W/F = 5.0 × 10−3 g min ml−1 by supplying sufficient humidity of 10 and 20 vol%, respectively. The heat-treatment of the ACF at 800 °C was found very effective to enhance the catalytic activity.
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Kisamori et al. (1993) studied this question.
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