Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 168, Issue 4, Pages -Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1945-7111/abf21a
Keywords
Solid oxide fuel cell; Siloxane; Biogas; Degradation; Carbon deposition; Silicon deposition
Funding
- U.S. Department of Energy [DE-EE0007721, NNCI-ECCS-1542160]
Ask authors/readers for more resources
The study found that the impact of siloxane on the anode of solid oxide fuel cells is irreversible, and carbon is also an important factor in siloxane contamination.
Siloxane, a common contaminant present in biogas, is known for adverse effects on cogeneration prime movers. In this study, the siloxane deposition products and mechanism in the solid oxide fuel cell nickel-yttria stabilized zirconia (Ni-YSZ) anode are investigated analytically and experimentally. An SOFC with Ni-YSZ anode and pure Ni/YSZ pellets were exposed to a simulated biogas-reformate fuel with octamethylcyclotetrasiloxane (D4) contamination at 750 degrees C. The electrochemical characterization results show that the SOFCs performance degradation caused by D4 contamination is irreversible. Morphology and XRD results illustrate that silicon and carbon deposition can both be detected in the anode and pellets. Graphite, SiC and SiO2 are all possible products based on the results of XRD test. According to the formation of graphite and SiC, the new mechanism suggests that carbon is also an essential factor in siloxane contamination of Ni-YSZ anodes besides silicon, which can be explained by the catalytic and electrochemical analysis.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available