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    Acid-catalyzed conversion of mono- and poly-sugars into platform chemicals: Effects of molecular structure of sugar substrate

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    Authors
    Hu, Xun
    Wu, Liping
    Wang, Yi
    Song, Yao
    Mourant, Daniel
    Gunawan, Richard
    Gholizadeh, Mortaza
    Li, Chun-Zhu
    Date
    2013
    Type
    Journal Article
    
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    Citation
    Hu, Xun and Wu, Liping and Wang, Yi and Song, Yao and Mourant, Daniel and Gunawan, Richard and Gholizadeh, Mortaza and Li, Chun-Zhu. 2013. Acid-catalyzed conversion of mono- and poly-sugars into platform chemicals: Effects of molecular structure of sugar substrate. Bioresource Technology. 133: pp. 469-474.
    Source Title
    Bioresource Technology
    DOI
    10.1016/j.biortech.2013.01.080
    ISSN
    09608524
    URI
    http://hdl.handle.net/20.500.11937/40826
    Collection
    • Curtin Research Publications
    Abstract

    Hydrolysis/pyrolysis of lignocellulosic biomass always produces a mixture of sugars with distinct structures as intermediates or products. This study tried to elucidate the effects of molecular structure of sugars on their acid-catalyzed conversions in ethanol/water. Location of carbonyl group in sugars (fructose versus glucose) and steric configuration of hydroxyl groups (glucose versus galactose) significantly affected yields of levulinic acid/ester (fructose > glucose > galactose). The dehydration of fructose to 5-(hydroxymethyl) furfural produces much less soluble polymer than that from glucose and galactose, which results in high yields of levulinic acid/ester from fructose. Anhydrate sugar such as levoglucosan tends to undergo the undesirable decomposition to form less levulinic acid/ester. Catalytic behaviors of the poly-sugars (sucrose, maltose, raffinose, β-cyclodextrins) were determined much by their basic units. However, their big molecular sizes create the steric hindrance that significantly affects their followed conversion over solid acid catalyst.

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