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  • optimization of supercritical phase and combined supercritical/subcritical conversion of lignocellulose for hexose production by using a flow reaction system

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 684
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     a flow reaction system was utilized to investigate lignocellulose conversion using combined supercritical/subcritical conditions for hexose production. initially, investigation of cellulose hydrolysis in supercritical water and optimization of reaction parameters were done. oligosaccharide yields reached over 30% at cellulose concentrations of 3–5 g l−1 and reaction times of 6–10 s at 375 °c, and 2.5–4 g l−1 and 8–10 s at 380 °c. temperatures above 380 °c were not appropriate for the supercritical phase in the combined process. subsequently, conversion of lignocellulosic materials under combined supercritical/subcritical conditions was studied. around 30% hexose was produced from corn stalks under the optimal parameters for supercritical (380 °c, 23–24 mpa, 9–10 s) and subcritical (240 °c, 8–9 mpa, 45–50 s) phases. flow systems utilizing the combined supercritical/subcritical technology present a promising method for lignocellulosic conversion. the results of this study provide an important guide for the operational optimization and practical application of the proposed system.

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