A two-phase flow model for hydrogen evolution in an electrochemical cell

    Authors

    M. D. Mat; K. Aldas;O. J. Ilegbusi

    Comments

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    Abbreviated Journal Title

    Int. J. Hydrog. Energy

    Keywords

    water electrolysis; two-phase flow; two-fluid model; NUMERICAL-SIMULATION; FORCED-CONVECTION; VOID FRACTION; BUBBLES; PREDICTION; TURBULENCE; LAYER; Chemistry, Physical; Electrochemistry; Energy & Fuels

    Abstract

    Hydrogen evolution, flow field and current density distribution in an electrochemical cell are investigated with a two-phase flow model. The mathematical model involves solutions of transport equations for the variables of each phase with allowance for inter-phase transfer of mass and momentum. The buoyancy force generated due to density difference between two phases modifies flow profile and increases fluid velocity at the vicinity of the electrode. The current density decreases over the electrode mainly because of the decrease in effective conductivity of electrolyte. It is found that the hydrogen generation significantly increases at higher electrolyte flow by reducing the residence time of bubbles over the electrode. The predicted results satisfactorily agree with data available in the literature. (C) 2003 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.

    Journal Title

    International Journal of Hydrogen Energy

    Volume

    29

    Issue/Number

    10

    Publication Date

    1-1-2004

    Document Type

    Article

    Language

    English

    First Page

    1015

    Last Page

    1023

    WOS Identifier

    WOS:000221922400005

    ISSN

    0360-3199

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