Dissertation
Ethanol Steam Reforming for Hydrogen Production and Solid Oxide Fuel Cell Applications
Washington State University
Doctor of Philosophy (PhD), Washington State University
2022
DOI:
https://doi.org/10.7273/000005051
Abstract
The dissertation herein investigates the Ethanol Steam Reforming (ESR) for syngas production (hydrogen (H2) and carbon monoxide (CO)) for Solid Oxide Fuel Cell (SOFC) applications. H2 gas is a promising renewable energy carrier. The H2 production from bioethanol through the ESR reaction is the effective route to achieve the hydrogen economy from an economic and environmental viewpoint. The SOFC is a promising technology for electricity generation due to its high efficiency and low emissions. The main objective is to develop an ethanol-fed intermediate temperature SOFC with a high-performance fuel reforming catalyst for an electric vehicle. The rhodium supported on cerium-zirconium oxide (Rh/CZ) catalyst and nickel-molybdenum supported on cerium-zirconium-yttrium oxide (NiMo/CZY) catalyst with high resistance of coke formation were synthesized and applied as an internal micro-reforming catalytic active layer over the Ni-YSZ anode of button-type SOFC. The inner micro-reforming catalytic active layer improves the electrochemical performance and stability of the button-typed SOFC by improving the ESR reaction performances. Various synthesis techniques of heterogeneous catalysts were utilized to reduce the metallic particle size and enhance the coke formation resistance for the ESR reaction under the SOFC operating conditions.
Chapter 1 reports the motivation and the main objectives, whereas chapter 2 covers the previous attempts and big challenges to synthesizing catalytic materials with high coke resistance for the ESR reaction. Chapter 3 investigated the influence of the internal micro-reforming Rh/CZ catalytic active layer on the SOFC’s electrochemical performance. Chapter 4 investigates the moisture effects on the CO oxidation reaction over highly dispersed atomically and nanocluster Rh catalysts and correlates their catalytic activities to their oxidation state (Rh+δ) and Rh size. Chapter 5 illuminates the crucial role of mesoporous morphology on coke formation for the ESR reaction. Chapter 6 elucidates the effect of oxygen storage capacity on coke formation by inserting Y3+ cation into the lattice structure of CZ support. The enhancement of the surface area of the perovskite catalyst by the polymethyl methacrylate (PMMA) templating method was covered in chapter 7.
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Details
- Title
- Ethanol Steam Reforming for Hydrogen Production and Solid Oxide Fuel Cell Applications
- Creators
- Mohamed Ali Elharati
- Contributors
- Su Ha (Advisor)M. Grant Norton (Committee Member)Di Wu (Committee Member)
- Awarding Institution
- Washington State University
- Academic Unit
- School of Chemical Engineering and Bioengineering
- Theses and Dissertations
- Doctor of Philosophy (PhD), Washington State University
- Publisher
- Washington State University
- Number of pages
- 330
- Identifiers
- 99901019237701842
- Language
- English
- Resource Type
- Dissertation