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Journal of Applied Electrochemistry

, Volume 9, Issue 1, pp 15–20 | Cite as

Packed-bed reactor with continuous recirculation of electrolyte

  • Dj. Matić
Article
  • 54 Downloads

Abstract

A comparison of calculated and experimental parameters for the packed-bed reactor working with recirculation of the electrolyte is given. A simple mathematical model was applied and the applicability of the relation
$$c = c^0 {\text{ exp(}} - k_1 At/V{\text{) for }}V_c \ll V_R $$
was tested. For the investigated reactor a dimensionless relation has been established from experimentalI-E curves for the single pass mode
$$(Sh) = 0 \cdot 5(Re)^{0 \cdot 7} (Sc)^{0 \cdot 33} .$$
For pure practical engineering requirements these two equations together give us a satisfactory way of predicting the concentration-time dependence.

Keywords

Physical Chemistry Mathematical Model Experimental Parameter Engineering Requirement Single Pass 
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.

Symbols

a0

specific area of material of given geometry (cm−1)

A

electrode area (cm2)

As

specific area of electrode bed (cm−1)

c0

initial concentration in the bulk (mol cm−3)

ci

inlet concentration (mol cm−3)

co

outlet concentration (mol cm−3)

ct

concentration in the bulk after a given electrolysis time (mol cm−3)

de

equivalent diameter (cm)

D

diffusion coefficient (cm2s−1)

I/1

limiting current (A)

k1

mass transfer coefficient,I1zFAc0 (cm s−1)

L

height of electrode bed (cm)

R1

degree of conversion in single pass,I1/zFc0Q

Rf

final degree of conversion, corresponding to the final concentration in bulk of solution

(Re)

Reynolds Number,υde/ν

(Sc)

Schmidt Number,ν/D

(Sh)

Sherwood Number,k1de/D

t

time (s)

T

weight (g)

Q

volumetric flow rate (cm3s−1)

υ

linear flow velocity (cm s−1)

Vc

cell volume (cm3)

VR

reservoir volume (cm3)

V

total electrolyte volume (cm3)

ε

porosity

ν

kinematic viscosity (cm2s−1)

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References

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Copyright information

© Chapman and Hall Ltd. 1979

Authors and Affiliations

  • Dj. Matić
    • 1
  1. 1.Institute of Electrochemistry, Faculty of TechnologyUniversity of ZagrebYugoslavia

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