FUEL 181 |
| High-purity (>99.999 %), pressurized (2 MPa) oxygen was produced under the influence of an externally applied electrical field in microchannel ion transport membranes containing a ceria electrolyte with perovskite electrodes and channeled lanthanum calcium manganite interconnects on the cathode and anode sides of the device. The cosintered cells were made by laminated object manufacturing techniques using ceramic tapes. The cells had a dense electrolyte in the center with porous electrodes and porous support layers on each side. Layers with gas flow channels were laminated onto the porous supports. Individual electrochemical cells were cosintered and then assembled into stacks of the appropriate size; dependent upon the oxygen flow-rate requirements of the device. Cosintering resulted in integral bonding between layers, which allowed compression of oxygen in the anode channels of the interconnects without the aid of a mechanical end load typically required to offset the internal oxygen pressure. This greatly reduces and simplifies the balance of plant required for a device. The pressure capability is limited by the strength of the bond interface between the porous support and the channeled layer. This paper describes potential applications and technical challenges that must be solved prior to commercialization. |
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Inorganic Membranes for Energy and Environmental Applications
1:00 PM-6:00 PM, Tuesday, August 21, 2007 Boston Park Plaza -- Chartes River Room, Oral
Division of Fuel Chemistry |