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Related Experiment Videos

Volatile organic compound adsorption in a gas-solid fluidized bed.

Y L Ng1, R Yan, L T S Tsen

  • 1Institute of Environmental Science and Engineering, Nanyang Technological University, Innovation Centre, Block 2 Unit 237, 18 Nanyang Drive, 637723 Singapore. ngyl@ntu.edu.sg

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|October 16, 2004
PubMed
Summary

This study compared adsorption rates in bubbling fluidized beds versus fixed beds. Bubbling beds showed higher adsorption rates, driven primarily by intraparticle mass transfer, though capacities were similar for zeolite.

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Area of Science:

  • Chemical Engineering
  • Adsorption Science
  • Fluidization Technology

Background:

  • Fluidization is crucial for processes like catalysis, drying, and combustion.
  • Understanding adsorption dynamics in different reactor types is key for process optimization.
  • Zeolite ZSM-5 and activated carbon are common adsorbents with distinct properties.

Purpose of the Study:

  • To compare dynamic adsorption characteristics and rates in bubbling fluidized beds and fixed beds.
  • To investigate the influence of bed type, particle size, and intraparticle mass transfer on adsorption.
  • To compare the adsorption performance of ZSM-5 zeolite and activated carbon for methanol and isobutane.

Main Methods:

  • Experimental comparison of adsorption in bubbling fluidized beds and fixed beds at identical gas flow rates, residence times, and bed heights.

Related Experiment Videos

  • Adsorption experiments using ZSM-5 zeolite and activated carbon with methanol and isobutane.
  • Fourier Transform Infrared (FTIR) spectroscopy for gas concentration quantification.

    • Main Results:

    • Bubbling fluidized beds exhibited higher adsorption rates than fixed beds under identical conditions.
    • Intraparticle mass transfer was the dominant factor influencing adsorption rates.
    • Adsorption capacity of ZSM-5 zeolite was similar in both bed types; activated carbon showed higher capacity for isobutane than zeolite but at a lower rate.

    Conclusions:

    • Fluidization enhances adsorption rates, primarily due to improved intraparticle mass transfer.
    • Bed type significantly impacts adsorption rate, but not necessarily adsorption capacity for zeolites.
    • Activated carbon demonstrates superior adsorption capacity for isobutane compared to ZSM-5 zeolite.