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Liquid–solid mass transfer for cocurrent gas–liquid upflow through solid foam packings

Authors

  • P. W. A. M. Wenmakers,

    1. Laboratory of Chemical Reactor Engineering, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
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  • J. van der Schaaf,

    1. Laboratory of Chemical Reactor Engineering, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
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  • B. F. M. Kuster,

    1. Laboratory of Chemical Reactor Engineering, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
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  • J. C. Schouten

    Corresponding author
    1. Laboratory of Chemical Reactor Engineering, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
    • Laboratory of Chemical Reactor Engineering, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
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Abstract

This article presents the liquid–solid mass transfer characteristics for cocurrent upflow operated gas–liquid solid foam packings. Aluminum foam was used with 10, 20, and 40 pores per linear inch (PPI), coated with 5 wt % Pd on γ-alumina. The effects of gas velocity (ug = 0.1−0.8 mmath image mmath image s−1) and liquid velocity (ul = 0.02 and 0.04 mmath image mmath image s−1) are studied using the Pd/Bi catalyzed oxidation of glucose. The volumetric liquid–solid mass transfer coefficient, klsals, is approximately the same for 10 PPI and 20 PPI solid foams, ranging from 2 × 10−2 to 9 × 10−2 mmath image mmath image s−1. For 40 PPI solid foam, somewhat lower values for klsals were found, ranging from 6 × 10−3 to 4 × 10−2 mmath image mmath image s−1. The intrinsic liquid–solid mass transfer coefficient, kls, increases with increasing liquid velocity and was found to be proportional to umath image. Initially, kls decreases with increasing gas velocity and after reaching a minimum value increases with increasing gas velocity. The values for kls range from 5.5 × 10−6 to 8 × 10−4 mmath image mmath image s−1, which is in the same range as found for random packings and corrugated sheet packings. © 2010 American Institute of Chemical Engineers AIChE J, 2010

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