3-6-1 セルロース熱分解速度論モデルの炭化物生成経路における還元性末端の役割(3-6 熱分解2・炭化,Session 3 バイオマス等,研究発表)

概要

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Pyrolysis behavior of cellulose (Avicel PH-101) was studied at relatively low pyrolysis temperature (below 280°C, under nitrogen). To clarify the role of reducing end in cellulose pyrolysis, NaBH_4-reduced cellulose was prepared, in which the content of reducing end was lowered down to 3% against the original cellulose. The NaBH_4-reduced cellulose was stabilized against color formation and DP(degree of polymerization)-change, both of which were observed in control cellulose sample at low pyrolysis temperature such as 240°C. From their thermogravimetric analysis data, the reducing end was suggested to enhance the low temperature weight-loss of cellulose. Shown weight-loss rate in major devolatilization step at higher temperature (〜350°C) and higher final char yield were also observed as influences of the reducing ends. Based on these results, role of the reducing end in low temperature char formation pathway of cellulose pyrolysis kinetic model was discussed.
2010-08-02