Two-phase Electrolysis Process Modelling: From
The Bubble To The Electrochemical Cell Scale
Author(s)
P. Mandin, H. Roustan, R. Wüthrich, J. Hamburger
& G. Picard
Abstract
During two-phase electrolysis for hydrogen, aluminium or fluor production,
there are bubbles which are created at electrodes which imply a great
hydrodynamic acceleration but also quite important electrical properties and
electrochemical processes disturbance. There are few works concerning the local
modelling of electrochemical processes during a two-phase electrolysis process.
Nevertheless, effects like the anode effect, particularly expensive on the point of
the process efficiency, should need a better understanding. The goal of the
present work is to present the modelling and the numerical simulation of the gas
production, from the single bubble scale to the macroscopic electrochemical cell,
during the two-phase electrolysis process. Bubbles are motion sources for the
electrolysis cell flow, and then hydrodynamic properties are strongly coupled
with species transport and electrical performances. The presence of bubbles
modifies these global and local properties: the electrolysis cell and the current
density distribution are modified. The present work shows theoretical modelling
on both scales and also performance changes during the two-phase electrolysis
processes.
Keywords: two-phase electrolysis modelling electrochemical bubbles.
1 Introduction
Gas release and induced fluid flow over electrodes exist in many electrochemical
processes such as aluminium, fluorine production, water electrolysis and many
Keywords
two-phase electrolysis modelling electrochemical bubbles.
Related Book
Other papers in this volume
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