| 초록 |
Lignin which one of the constituents of lignocellulosic biomass is an amorphous co-polymer consisting of various aromatic compounds. In this work, catalytic conversion in supercritical ethanol was conducted to explore reaction pathway of benzyl phenyl ether (BPE), containing α-O-4 bonds and depolymerization of real lignin sources (Protobind lignin, PL) without supplying external hydrogen. The conversion of BPE was more than 95 % over all of catalysts with noble-metals at 270 ℃ for 4 h, and the conversion speed and the yield distribution were different for each catalyst. Based on the results, plausible reaction pathway from BPE decomposition depending on the catalysts was proposed. In addition, it was found that Cu metal among transition metals plays an important role in promoting the depolymerization of lignin Cu/ZSM-5, which was loaded 10 wt.% Cu and was Si/Al2 ratio of 30, resulted in the highest yield of mono-aromatic compounds; 98.2 wt.%. |
