A STUDY OF THE CONTRIBUTION OF SURFACE FLOW TO MASS TRANSPORT IN POROUS GAS DIFFUSION ELECTRODES

Abstract

Surface mobility contributes very little to the total flow through pores except where pore radius is very small (R < 100 microns). In this range of pore radii current densities are on the order of 0.1 amp/sq. cm. for a pore of 1 cm length. If pore length is decreased, current density will be increased. Coating of the electrode surface with wet-proofing agents does not appear to affect substantially the flow of gas molecules by surface migration. Therefore, surface migration can be neglected in computing mass transfer in normal porous electrodes for these usually contain pores having radii 1000 microns or larger. (Author)

Document Details

Document Type
Technical Report
Publication Date
Dec 15, 1962
Accession Number
AD0293849

Entities

People

  • Henry R. Wengrow

Organizations

  • University of Florida

Tags

DTIC Thesaurus Topics

  • Current Density
  • Diffusion
  • Electrodes
  • Lepidoptera
  • Mass Transfer
  • Migration
  • Mobility
  • Molecules
  • Transport Ships

Readers

  • Combustion and Flow Dynamics.
  • Nanocomposite Materials Science
  • Semiconductor Device Technology