Supercritical methanol has the potential to protect various monomelic wood-derived products against undesirable degradation to achieve efficient chemical production. In this study, Japanese cedar (Cryptomeria japonica) was treated in supercritical methanol with a semi-flow reactor, adding10% of water to increase the decomposition rate. During ramp heating at 4°C/min, lignin and hemicelluloses were mainly decomposed around at 270°C, while cellulose was around at 350°C. Coniferyl alcohol and its r-methyl ether were obtained from lignin in high yield and selectivity.
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