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    Cellulose pretreatment with l-methyl-3-methylimidazolium dimethylphosphate for enzymatic hydrolysis

    Access Status
    Fulltext not available
    Authors
    Xie, R.
    Li, Xin Yong
    Zhang, Y.
    Date
    2012
    Type
    Journal Article
    
    Metadata
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    Citation
    Xie, R. and Li, X. and Zhang, Y. 2012. Cellulose pretreatment with l-methyl-3-methylimidazolium dimethylphosphate for enzymatic hydrolysis. Cellulose Chemistry and Technology. 46 (5-6): pp. 349-356.
    Source Title
    Cellulose Chemistry and Technology
    Additional URLs
    http://www.cellulosechemtechnol.ro/pdf/CCT5-6(2012)/p.349-356.pdf
    ISSN
    0576-9787
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/35775
    Collection
    • Curtin Research Publications
    Abstract

    This work has been focused on a cellulose pretreatment process using l-methyl-3-methylimidazolium dimethylphosphate ([DMIM]DMP) for subsequent hydrolysis over cellulase. Different operational variables (the amount of [DMIM]DMP, the pretreatment temperature, the pretreatment period) affecting the pretreatment were investigated. Additionally, the crystallinity index (CI) was characterized by FT-IR spectroscopy. The CI values including CI(IR), CI(IR-CI) and CI(IR-CII) were calculated. When correlated with these values, the concentrations of total reducing sugar (TRS) released after the pretreatment of microcrystalline cellulose (MC) were found to show a distinct relationship with the [CI(MC-CI) - CI(IR-CI)] values, and the result was verified by X-ray diffraction (XRD). Consequently, the optimum pretreatment conditions of crystalline transformation (from cellulose I to cellulose II) characterized by XRD are different from those of hydrolysis. This result suggests that other factors, in addition to cellulose crystallinity, affect the yields of glucose and total reducing sugar obtained by hydrolysis.

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