Abstract
Japanese cypress (Hinoki) samples charcoalized at various temperature were exposed to mixed gas of toluene and α-pinene. With the sample charcoalized at 700°C, probably flat-shaped toluene molecules could get into the slit-shaped and narrower sized pores of 0.8nm in diameter, whereas bulky globular-shaped α-pinene molecules could not access. In this case, wood charcoal, as a kind of molecular sieving carbon, successfully removed only harmful volatile organic compound (VOC) of toluene, but leaving a pleasant aroma of α-pinene in the atmosphere. We found that a ceramic powder-coated wood charcoal (Ceramic charcoal) of Hinoki with rotary kiln has a similar characteristic. So, we developed an interior as amenities of air quality taking advance of this molecular sieving behavior of wood charcoal.
