フェノール樹脂廃棄物から製造した活性炭の吸着性能と加熱再生特性

フェノール樹脂

Activated carbons were produced from five kinds of waste phenol-formaldehyde (PF) resins by the steam activation. The specific surface area of an activated carbon made from a most commonly used PF resin (sample A) reached more than 1000m2/g in about 25% yield. The amounts of benzene and methanol vapors adsorbed on the activated carbon were much larger than those adsorbed on a commercial carbon (Figs. 8,9). The amount of phenol adsorbed from the dilute aqueous solution on the activated carbon was comparable to that of another commercial carbon (Fig. 10). The specific surface areas of activated carbons produced from other two PF resins (sample B and C) were also comparable to those of an activated carbon produced from the Miike coal (Fig. 6). The activated carbon made from sample A was rendered to the repeated cycles consisting of adsorption of waste water and thermal regeneration. Although the specific surface area and the adsorption capacity of the activated carbon decreased with an increase of the number of the cycle, the extents of the decrease were similar to those of a commercial carbon (CAL). Thus it was found that the activated carbons made from waste PF resins serve for practical use