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Journal of Applied Electrochemistry

, Volume 24, Issue 7, pp 670–675 | Cite as

Study of pulsing flow in a trickle bed using the electrodiffusion technique

  • N. A. Tsochatzidis
  • A. J. Karabelas
Papers

Absract

An electrochemical technique is employed for measuring local, instantaneous liquid-solid mass transfer coefficients in downward cocurrent gas-liquid flow through a packed bed under pulsing flow conditions. The technique involves specially designed electrodes of the same dimensions as the packing material. Also microelectrodes on the surface of a particle are tested for flow diagnostics in the microscale. The feasibility of the method is examined. Interpretation of measurements from various electrodes provides information on the pattern of mass transfer and liquid distribution in the packing.

Keywords

Physical Chemistry Mass Transfer Transfer Coefficient Flow Condition Mass Transfer Coefficient 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

List of symbols

D

diameter of the bed

DL

molecular diffusivity

dp

particle diameter

Ks

liquid-solid mass transfer coefficient

r

distance from the wall of the bed

ReL

liquid Reynolds number (ULdpρLL)

Sc

Schmidt number (µLLDL)

Sh

Sherwood number (Ksdp/DL)

UL

liquid superficial velocity

Greek symbols

µL

dynamic viscosity of the liquid

ρL

density of the liquid

ϕ

wetted fraction of the cathode

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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • N. A. Tsochatzidis
    • 1
    • 2
  • A. J. Karabelas
    • 1
    • 2
  1. 1.Chemical Process Engineering Research InstituteAristotle University of TessalonikiThessalonikiGreece
  2. 2.Department of Chemical EngineeringAristotle University of TessalonikiThessalonikiGreece

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