Abstract
Test activated carbon fiber (ACF) was prepared from Polyacrylonirile (PAN) through oxidation and chemical activation. Immersion of ACF precursors in the aqueous KOH solution enhanced the surface structure, as examined by BET pore analysis. Specific surface area increased greatly from less than 70 m/g to 1226 m/g with 4 M KOH, and total pore volume also rose up to 0.483 cm/g. In particular, it was found that micropores favorable for CO2 molecule capture occupied more than 95%. Maximum CO2 adsorption capacity was 3.59 mmol/g at 298 K. Low depth of pores in the present ACF may facilitate the molecules’ desorption for its regeneration.
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