Abstract
Japanese cedar wood or bark was pyrolyzed at 350℃ or 500℃ in N_2 with or without H_2O. Solid residues and tars obtained were respectively analyzed using FT-IR and GOMS for investigating the effect of H_2O. The effect of adding H_2O was remarkable in bark at 500℃: yields of the solid residue decreased largely. FT-IR analyses of the solid residues showed strong peaks derived from benzene and phenolic ethers in all cases. Tars obtained were almost the primary tars, which were roughly classified in low molecular oxygenates, guiacol/phenol derivatives and phenanthrene hydro type derivatives. Both low molecular oxygenates and phenanthrene hydro derivatives among tars obtained in the presence of H_2O were much more compared to those obtained in N_2 alone, which suggested H_2O accelerated the decomposition of the primary tars.
