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Modeling Coupled Transport and Reaction Phenomena in Porous Media by Lattice Boltzmann Method: Micro Reactors and Polymer Electrolyte Fuel Cell Electrode

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This work is about applying Lattice Boltzmann Method for modeling transport (i.e. fluid flow, heat transfer and mass transfer) and reactive phenomena ( chemical and electrochemical reaction) in micro-reactors and in cathod of polymer electrolyte fuel cell (3.697Mb)
Advisor
Hejazi, Hossein
Karan, Kunal
Author
Tarokh, Atefeh
Committee Member
Roberts, Edward(Ted)
Ponnurangam, Sathish
Other
Lattice Boltzmann Method
Micro-reactors
Polymer electrolyte fuel cell
Subject
Engineering--Chemical
Type
Thesis
Metadata
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Abstract
A numerical code based on Lattice Boltzmann Method (LBM) capable of solving coupled reaction-transport phenomena (i.e. heat, mass, fluid flow and reaction) in porous media was developed. LBM is a powerful numerical technique for modeling transport phenomena in complex geometries. The developed in-house LBM code is then used to: First, modeling ammonia decomposition in the micro-reactors made of catalyst-coated posts. Fluid flow, heat and mass transfer along with chemical reaction simultaneously occur in micro-reactors. A parametric study in terms of post shapes and arrangements was performed. It was found that square shape posts with hexagonal arrangement yield maximum based on hydrogen production. Second, modeling the oxidation reduction reaction in the cathode of a polymer electrolyte fuel cell as an idealized single pore geometry. Oxygen, ion and electron diffusions are modeled. Fuel cell performance based on the generated polarization curve is examined for various ionomer thickness.
Corporate
University of Calgary
Faculty
Graduate Studies
Doi
http://dx.doi.org/10.11575/PRISM/26941
Uri
http://hdl.handle.net/11023/3276
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