Anode supported single chamber solid oxide fuel cells operating in exhaust gases of thermal engine.
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| Title: | Anode supported single chamber solid oxide fuel cells operating in exhaust gases of thermal engine. |
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| Authors: | Briault, Pauline1, Rieu, Mathilde1 rieu@emse.fr, Laucournet, Richard2, Morel, Bertrand2, Viricelle, Jean-Paul1 |
| Source: | Journal of Power Sources. Dec2014, Vol. 268, p356-364. 9p. |
| Subjects: | Anodes, Solid oxide fuel cells, Waste gases, Thermal analysis, Electrochemical analysis, Carbon monoxide, Waste products as fuel |
| Abstract: | This project deals with the development and the electrochemical characterization of anode supported single chamber SOFC in a simulated environment of thermal engine exhaust gas. In the present work, a gas mixture representative of exhaust conditions is selected. It is composed of hydrocarbons (HC: propane and propene), oxygen, carbon monoxide, carbon dioxide, hydrogen and water. Only oxygen content is varied leading to different gas mixtures characterized by three ratios R = HC/O2. Concerning the cell components, a cermet made of nickel and an electrolyte material, Ce0.9Gd0.1O1.95 (CGO) is used as anode and two cathode materials, La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) and Pr2NiO4+δ (PNO), are evaluated. The prepared cells are investigated in the various gas mixtures for temperatures ranging from 450 °C to 600 °C. Ni-CGO/CGO/LSCF-CGO cell has delivered a maximum power density of 15 mW cm-2 at 500 °C with R = HC/O2 = 0.21, while lower power densities are obtained for the other ratios, R = 0.44 and R = 0.67. Afterwards, LSCF and PNO cathode materials are compared and LSCF is found to deliver the highest power densities. Finally, by improving the electrolyte microstructure, some cells presenting a maximum power density of 25 mW cm-2 at 550 °C are produced. Moreover, up to 17% of initial HC are eliminated in the gas mixture. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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