| 초록 |
Lignin is uneatable biomass and large amounts of lignin are produced by the lignocellulosics biomass-to-ethanol process and pulp & paper refineries process as waste. Most of it is burned as low-grade fuel. However the aromatic complex chemical structure of lignin suggests that it may be a good source of valuable aromatic chemicals if it could be broken into smaller molecular units. Phenethyl phenyl ether (PPE), model of the β-O-4 linkage prevalent in lignin, was hydrolyzed in near-critical water. The influence of Na2CO3/ZrO2 base catalyst on these reactions was tested from 200 to 400℃ reaction temperature. And catalysts were characterized by BET, XRD, CO2-TPD etc. Phenol, styrene and ethyl benzene were mainly produced by hydrolysis reaction of PPE. In presence of Na2CO3/ZrO2 base catalyst, the conversion and products yield increased sharply at the entire temperature range. |
