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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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Detailed Multi-dimensional Modeling of Direct Internal Reforming Solid Oxide Fuel Cells.

K Tseronis1, I S Fragkopoulos1, I Bonis1

  • 1School of Chemical Engineering and Analytical Science, University of Manchester, Manchester M13 9PL, UK.

Fuel Cells (Weinheim)
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Summary
This summary is machine-generated.

Direct internal reforming solid oxide fuel cells (SOFCs) offer fuel flexibility. Optimizing operating temperature and anode catalyst layer thickness enhances SOFC performance and efficiency.

Keywords:
DIR‐SOFCDusty‐Gas/Stefan‐Maxwell CouplingMultidimensional ModelingParallel H2 and CO Electro‐oxidation

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Chemical Engineering

Background:

  • Solid oxide fuel cells (SOFCs) offer significant fuel flexibility due to high operating temperatures.
  • Direct internal reforming (DIR) SOFCs eliminate the need for a separate fuel reformer, simplifying the system.

Purpose of the Study:

  • To develop and validate a detailed multidimensional model of a planar DIR-SOFC.
  • To investigate the system behavior and efficiency through parametric studies for design optimization.

Main Methods:

  • Utilized Stefan-Maxwell model for fuel channel mass transport.
  • Employed Dusty-Gas model for porous electrode mass transport.
  • Implemented the model in COMSOL Multiphysics and validated against experimental data.

Main Results:

  • Internal reforming causes a temperature drop near the inlet.
  • Increasing operating temperature enhances DIR-SOFC performance.
  • Decreasing inlet temperature leads to smoother temperature profiles and reduced thermal gradients.
  • Anode catalyst layer thickness affects performance, balancing activation and ohmic overpotentials.

Conclusions:

  • The validated model provides insights into DIR-SOFC operation.
  • Parametric studies aid in optimizing DIR-SOFC design for improved efficiency.
  • Understanding thermal and electrochemical phenomena is crucial for SOFC development.