| 초록 |
Decomposition of lignin model compound, benzyl phenyl ether (BPE), to phenol and toluene was performed over carbon-supported noble metals (Ru, Pd, and Pt) catalysts in supercritical ethanol without supplying ex-situ hydrogen. The conversion of BPE was higher than 95% over all carbon-supported noble metal catalysts at 270 ℃ for 4 h. 5 wt.% Pd/C demonstrated the highest yield (ca. 59.3%) of target products, which also enhanced reaction rate more significantly than other catalysts. In addition, a model reaction using phenol as a reactant was conducted to check the secondary reactions of phenol such as alkylation or hydrogenation under supercritical ethanol. The product distribution when phenol was used as a reactant was mostly consistent with BPE as a reactant. Based on the result, plausible reaction pathways during the decomposition of BPE over the catalysts in supercritical ethanol were proposed. |
