Abstract
In this study, ethanol organosolv lignin (EOL) yield and structural characteristics of EOL depending on the production condition were evaluated to understand the lignin fractionation behavior and to determine the optimal condition for the production of phenolic compounds. EOL yield was enlarged until combined severity factor (CSF) reached 1.2, while molecular weight and nitrobenzene oxidation (NBO) yield of EOL were declined more than a half compare to those from CSF 0 to 0.6. Both EOL and NBO yields were predictable as a function of CSF with very high coefficient of determination. Concentration of phenolic compounds released from pyrolysis GC/MS was relatively stable until reaching CSF 1.5. However, it was significantly affected by not only CSF but also the concentration of acid used for the fractionation of EOL. Therefore, in order to produce phenolic compounds from EOL, production condition should be controlled between CSF 1.2 and 1.5 with low acid concentration.
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