Abstract
In order to obtain porous carbon materials with meso pores, Phenol-formaldehyde resin (PFR) containing sawdust was immersed in 50wt % KOH aqueous solution and heated to 973 - 1223 K in N2 (PFR-saw dust). Meanwhile PF resin carbonized at 873K was mixed with an excess amount of KOH, and heated to 1073 K in N2 (PFR-KOH). The carbons thus obtained were investigated pore structure by measurement of BET surface area and pore-size distribution. Adsorption behaviour of Phenol, Aniline and DBS from aqueous solution was studied and adsorption tests for various kinds of organic vapor were also carried out. PFR-sawdust and PFR-KOH had surface areas of 1, 500 and 3, 000 m2/g, respectively. PFR-sawdust AC showed high adsorption capacity for liquid phase. A large number of open pores formed on the external surface whose diameter was 2 - 5μm. It seems that these pores were formed by gasification of sawdust with KOH.
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