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    One-step hydroxylation of benzene to phenol via a Pd capillary membrane microreactor

    Access Status
    Fulltext not available
    Authors
    Wang, X.
    Tan, X.
    Meng, B.
    Zhang, X.
    Liang, Q.
    Pan, H.
    Liu, Shaomin
    Date
    2013
    Type
    Journal Article
    
    Metadata
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    Citation
    Wang, Xiaobin and Tan, Xiaoyao and Meng, Bo and Zhang, Xiongfu and Liang, Qi and Pan, Hui and Liu, Shaomin. 2013. One-step hydroxylation of benzene to phenol via a Pd capillary membrane microreactor. Catalysis Science & Technology. 3 (9): pp. 2380-2391.
    Source Title
    Catalysis Science & Technology
    DOI
    10.1039/c3cy00159h
    ISSN
    2044-4753
    URI
    http://hdl.handle.net/20.500.11937/16915
    Collection
    • Curtin Research Publications
    Abstract

    A novel Pd capillary membrane microreactor for one-step hydroxylation of benzene to phenol was synthesized and investigated to showcase the effectiveness of ‘Niwa concept’. Reaction parameters including H2/O2 ratio and temperature were systematically studied for their effects on benzene conversion and phenol yield. A detailed examination of different membrane reactors, feed mode and long-term reaction stability was also conducted. Pd capillary membrane displayed good stability for low temperature separation and reaction due to the excellent anchorage of Pd layer into the porous α-alumina support. An optimum H2/O2 ratio was identified at 473 K with the benzene conversion of 19.6% and phenol yield of 18.1%. An increase in reaction temperature caused not only an increase in benzene conversion but also a decrease in phenol selectivity. A comparison between our work and the literature results was also made to discuss the feasibility of the membrane reactor concept. Experimental results proved that narrow flow channels and larger Pd membrane surface area-to-volume ratios provided more effective area of Pd interface and promoted the radial diffusion of reactants, enabling the reactive species more opportunities to react directly with benzene resulting in high benzene conversion.

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