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  • evidence for room temperature delignification of wood using hydrogen peroxide and manganese acetate as a catalyst

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 503
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     manganese acetate was found to catalyze the oxidative delignification of wood with hydrogen peroxide at room temperature. the delignification reaction was monitored by optical and raman microscopy, and liquid chromatography/mass spectrometry. when exposed to h2o2 and mn(oac)3 in aqueous solution, poplar wood sections were converted into a fine powder-like material which consisted of individual wood cells within 4 days at room temperature and without agitation. optical and raman microscopy provided the spatial distribution of cellulose and lignin in the wood structure, and showed the preferential oxidation of lignin-rich middle lamellae. raman spectra from the solid residue revealed a delignified and cellulose-rich material. glucose yields following enzymatic hydrolysis were 20–40% higher in poplar sawdust pretreated with mn(oac)3for 2, 4, and 7 days at room temperature than those in sawdust exposed to water only for identical durations, suggesting the viability of this mild, inexpensive method for pretreatment of lignocellulosic biomass.

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