Dissertation
PRESSURIZED SOLID OXIDE ELECTROLYSIS: MODELING SYSTEM PERFORMANCE AND DEMONSTRATING OPERATION
Washington State University
Doctor of Philosophy (PhD), Washington State University
01/2022
DOI:
https://doi.org/10.7273/000004566
Handle:
https://hdl.handle.net/2376/124803
Abstract
This work investigates high pressure solid oxide electrolysis (SOE) through fundamental thermodynamic analysis, system modeling, and experimentation with state of the art (SoA) materials and technology. Pressurized steam electrolysis can meet lifetime efficiency targets reducing the energy requirement for practical hydrogen production by 18% over non-pressurized electrolysis. A system thermoneutral point is determined to maximize lifetime fuel production and system efficiency. Operating conditions and system design tradeoffs are identified for lower cost hydrogen production. Commercial cell testing solutions meeting the demanding operating requirements of high pressure, temperature, oxidizing, and reducing environments are demonstrated for long duration with pressurized and steam conditions. Improved performance is shown with commercially manufactured cells in pressurized testing environments up to 10 barg, though these conditions are found to accelerate degradation of SoA solid oxide materials. The research presented here advances current SOE systems knowledge for renewable fuel production. The findings identify an alternative approach to solid oxide technology development for greater efficiency. Commercialization of this technology has the potential for large scale displacement of fossil fuels.
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Details
- Title
- PRESSURIZED SOLID OXIDE ELECTROLYSIS
- Creators
- Ryan Hamilton
- Contributors
- Dustin McLarty (Advisor)Jacob Leachman (Committee Member)M. Grant Norton (Committee Member)
- Awarding Institution
- Washington State University
- Academic Unit
- Mechanical and Materials Engineering, School of
- Theses and Dissertations
- Doctor of Philosophy (PhD), Washington State University
- Publisher
- Washington State University
- Number of pages
- 290
- Identifiers
- 99900898640601842
- Language
- English
- Resource Type
- Dissertation