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    Rapid Recovery of Fermentable Sugars for Biofuel Production from Enzymatic Hydrolysis of Microcrystalline Cellulose by Hot-Compressed Water Pretreatment

    Access Status
    Fulltext not available
    Authors
    Zhou, W.
    Yu, Yun
    Liu, Dawei
    Wu, Hongwei
    Date
    2013
    Type
    Journal Article
    
    Metadata
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    Citation
    Zhou, Wenbing and Yu, Yun and Liu, Dawei and Wu, Hongwei. 2013. Rapid Recovery of Fermentable Sugars for Biofuel Production from Enzymatic Hydrolysis of Microcrystalline Cellulose by Hot-Compressed Water Pretreatment. Energy & Fuels. 27 (8): pp. 4777-4784.
    Source Title
    Energy & Fuels
    DOI
    10.1021/ef4009828
    ISSN
    0887-0624
    URI
    http://hdl.handle.net/20.500.11937/14744
    Collection
    • Curtin Research Publications
    Abstract

    Enzymatic hydrolysis of microcrystalline cellulose is a multistep heterogeneous reaction limited by the initial action of enzyme to produce short glucose chains, due to the presence of strong intermolecular and intramolecular hydrogen bonding networks in cellulose chains. The results in this study show that enzymatic hydrolysis of the liquid product from hot-compressed water (HCW) pretreatment of microcrystalline cellulose can be immediately converted into glucose oligomers with DPs up to 5 without incubation even at a low enzyme loading (i.e., ~8.6 FPU/g glucan-equivalent). A high enzyme loading (i.e., ~140 FPU/g glucan-equivalent) is able to convert all the glucose oligomers into glucose and cellobiose after 1 h incubation. Overall, the sugar recovery after HCW pretreatment can be drastically increased by up to 2 orders of magnitude, depending on enzyme loading and incubation time. Therefore, HCW pretreatment of microcrystalline cellulose is an effective pretreatment method to break hydrogen bonding networks and convert crystalline bundles of long cellulose chains into soluble glucose oligomers with a wide range of degrees of polymerization (DPs), drastically increasing the chain ends accessibility and enabling enzymatic hydrolysis to take place homogeneously.

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