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Ni-samaria-doped Ceria (Ni-SDC) Anode-supported Solid Oxide Fuel Cell (SOFC) Operating with CO

Asmida, Ideris and Croiset, Eric and Pritzker, Mark (2017) Ni-samaria-doped Ceria (Ni-SDC) Anode-supported Solid Oxide Fuel Cell (SOFC) Operating with CO. International Journal of Hydrogen Energy, 42 (14). pp. 9180-9187. ISSN 0360-3199

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The performance of nickel-samaria-doped ceria (Ni-SDC) anode-supported cell with CO-CO2 feed was evaluated. The aim of this work is to examine carbon formation on the Ni-SDC anode when feeding with CO under conditions when carbon deposition is thermodynamically favoured. Electrochemical tests were conducted at intermediate temperatures (550–700 °C) using 20 and 40% CO concentrations. Cell operating with 40% CO at 600–700 °C provided maximum power densities of 239–270 mW cm−2, 1.5 times smaller than that achieved with humidified H2. Much lower maximum power densities were attained with 20% CO (50–88 mW cm−2). Some degradation was observed during the 6 h galvanostatic operation at 0.1 A cm−2 with 40% CO fuel at 550 °C which is believed due to the accumulation of carbon at the anode. The degradation in cell potential occurred at a rate of 4.5 mV h−1, but it did not lead to cell collapse. EDX mapping at the cross-section of the anode revealed that carbon formed in the Ni-SDC cell was primarily deposited in the anode section close to the fuel entry point. Carbon was not detected at the electrolyte-anode interface and the middle of the anode, allowing the cell to continue operation with CO fuel without a catastrophic failure

Item Type: Article
Additional Information: Indexed by Scopus; IF:3.582; JCR® Category: CHEMISTRY, PHYSICAL (Q2) ELECTROCHEMISTRY (Q1); ENERGY & FUELS (Q2)
Uncontrolled Keywords: Ni-SDC; CO; Carbon deposition; Solid oxide fuel cell
Subjects: T Technology > TP Chemical technology
Faculty/Division: Faculty of Chemical & Natural Resources Engineering
Depositing User: Mrs. Neng Sury Sulaiman
Date Deposited: 23 Aug 2017 07:56
Last Modified: 08 Feb 2018 04:45
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