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    Effect of Alkali and Alkaline Earth Metal Chlorides on Cellobiose Decomposition in Hot-Compressed Water

    Access Status
    Fulltext not available
    Authors
    Yu, Yun
    Mohd Shafie, Zainun
    Wu, Hongwei
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Yu, Y. and Mohd Shafie, Z. and Wu, H. 2015. Effect of Alkali and Alkaline Earth Metal Chlorides on Cellobiose Decomposition in Hot-Compressed Water. Industrial & Engineering Chemistry Research. 54 (20): pp. 5450-5459.
    Source Title
    Industrial & Engineering Chemistry Research
    DOI
    10.1021/acs.iecr.5b01007
    ISSN
    0888-5885
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/21827
    Collection
    • Curtin Research Publications
    Abstract

    This paper reports a systematic study on the catalytic effect of alkali and alkaline earth metal (AAEM) chlorides on cellobiose decomposition in hot-compressed water (HCW) at 200–275 °C. The AAEM chlorides catalyze the cellobiose decomposition in HCW in the order of MgCl2 > CaCl2 > KCl > NaCl. The presence of AAEM chlorides not only increases the reaction rate but also alters the selectivities of primary reactions of cellobiose decomposition. The isomerization reactions to cellobiulose and glucosyl-mannose are strongly promoted by these cations due to their interactions with cellobiose. The hydrolysis reaction to glucose is also promoted as the hydrolysis of hydrated metal complexes generates H3O+. However, the promotion effect on hydrolysis reaction is much weaker, resulting in reduced glucose selectivity in AAEM chloride solutions. Depending on the AAEM species, the secondary decomposition reactions of those primary products are selectively catalyzed in AAEM chloride solutions, thus greatly influencing the product distribution of cellobiose decomposition in HCW.

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