Effects of H2S and H2O on carbon deposition over La0.4Sr0.5Ba0.1TiO3/YSZ perovskite anodes in methane fueled SOFCs

• Published in: Journal of power sources Vol. 250; pp. 134 - 142
• Main Authors: Cui, Shao-Hua, Li, Jian-Hui, Jayakumar, Abhimanyu, Luo, Jing-Li, Chuang, Karl T., Hill, Josephine M., Qiao, Li-Jie
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.03.2014
• Subjects: Carbon; Hydrogen sulfide; LSBT; Solid oxide fuel cell; Steam; Hydrogen sulfide; LSBT; Solid oxide fuel cell; Carbon; Steam
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2013.10.124

The effects of H2S and H2O in the methane feed on carbon deposition in a La0.4Sr0.5Ba0.1TiO3 (LSBT) anode-based solid oxide fuel cell were investigated in this work under different operating conditions. Characterization was done using a combination of electrochemical, Fourier transform infra-red spectroscopy (FTIR), temperature-programmed oxidation (TPO) and X-ray photoelectron spectroscopy (XPS) measurements. As expected, carbon accumulation became more severe with increasing exposure time and operating temperature, but less severe in the presence of a current and/or steam. Addition of 0.5% H2S to the feed increased carbon accumulation and this carbon could not be removed effectively by co-feeding a small amount of steam to the anode. The resulting carbon was, however, easier to remove with oxygen as compared to that deposited by the H2S-containing dry feed. [Display omitted] The effects of H2S and H2O in the methane feed on carbon deposition in a La0.4Sr0.5Ba0.1TiO3 (LSBT) anode-based solid oxide fuel cell were investigated in this work under different operating conditions. •Carbon deposition became more severe with increasing exposure time and temperature.•Carbon deposition became less severe in the presence of a current or steam.•Introduction of H2S aggravated carbon deposition.•Deposits could not be allayed effectively by adding H2O in the presence of H2S.