Comparison of Operating Atmosphere Impact on La0.7Sr0.3V3.86-X (LSV) Intermediate-Temperature Solid Oxide Fuel Cell Sulfur Tolerance Explored through Experimental and Modeling Characterization Over Time
Abstract
Solid Oxide Fuel Cells (SOFCs) have the potential to provide clean, secure, and highly efficient sustainable energy for the U.S. Army. SOFCs can use many different reformed hydrocarbon fuels to obtain hydrogen for power generation, which include externally reformed JP-8, or can directly feed alternative fuels scavenged in theater. One long-term problem, specific for the U.S. Army, is sulfur performance degradation, common in most fuel options. JP-8 is not commonly desulfurized, and any scavenged fuel could be contaminated with sulfur. One solution to this problem could be the anode catalyst material, La0.7Sr0.3VO3.86-x (LSV), which has previously demonstrated significant sulfur tolerance at temperatures greater than 700 deg. C. This study further investigates LSVs sulfur tolerance at intermediate temperatures (400-700 deg. C) in hydrogen and methane atmospheres up to 100 hours, where it was observed to be up to 278-287x more tolerant than Ni-YSZ (700 deg. C), believed to be due to electronic/ionic changes occurring during exposure.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 09, 2022
- Accession Number
- AD1182536
Entities
People
- Talia M. Sebastian
- Theodore E. Burye