The Gene and Linda Voiland School of Chemical Engineering and Bioengineering department at Washington State University is pleased to invite you to our upcoming seminar, Monday, November 2, at 12:10 p.m. in Todd 311.
Dr. Marina is widely recognized for her technical contributions relating to the solid oxide fuel cell advanced electrode and interconnect development and understanding of the degradation mechanisms. She joined PNNL in 1999 after holding research positions at Boreskov Institute of Catalysis, Russia, University of Patras, Greece, and Risø National Laboratory, Denmark. Dr. Marina’s interdisciplinary research is at the forefront of materials chemistry and electrocatalysis focusing on the development of innovative materials for solid oxide fuel cells, electrochemical sensors, electrolyzers, and ceramic membranes relative to energy generation and storage and CO2 capture and conversion. She has published over 60 peer-reviewed journal articles and conference papers, 2 book chapters, and holds 6 U.S. and foreign patents. From 2003, she serves as an adjunct faculty at Washington State University.
Research Interests:
- Advanced energy generation and energy storage devices, fuel cells, electrochemical sensors, electrolysers, gas separation membranes
- Carbon capture and utilization; CO2-free conversion of fossil fuels
- Environmental catalysis, electrocatalysis, and chemical cogeneration
“Stability of Solid Oxide Fuel Cell Anodes in Different Fuels”
Efficiencies greater than 50 percent have been projected for solid oxide fuel cell (SOFC) systems fueled with gasified coal or biomass with carbon sequestration. However, multiple minor and trace components are present in the different fuels that could affect fuel cell performance. Minor and trace components have been classified into three groups: elements with low volatility that are likely to remain in the ash, elements that will partition between solid and gas phases, and highly volatile elements that are unlikely to condense. Those in the second group are of most concern. In this presentation, an overview of the results of SOFC anode interactions with phosphorus, arsenic, selenium, sulfur, antimony, and hydrogen chloride as single contaminants or in combinations is discussed. In addition, a comprehensive study to evaluate performance of the Ni/YSZ anodes at high fuel utilization during long-term, over 5,000 hours, cell operation and determine whether high fuel utilization leads to accelerated performance losses for SOFCs was completed. High fuel utilization conditions are likely to exist during the SOFC operation, in particular at high temperatures, towards the end of the cell. Nickel SOFC anodes are susceptible to coarsening when exposed to high steam concentration at high temperatures. Because the exchange current density is directly related to the nickel particle size, coarsening would lead to the SOFC aging.
