FUEL 175 |
| Current membrane technologies for hydrogen separation have two primary challenges: low hydrogen flux and chemical incompatibility with the high-temperature syngas environment. Thus, there is a critical need for the development of a robust and efficient membrane system that can overcome these problems. We have investigated a two-phase proton and electron conducting ceramic composite system as a hydrogen permeation membrane. The primary benefit in selecting a ceramic second phase as the electronic conductor arises from the thermochemical compatibility of the two phases. By appropriate selection of compositions, the thermal expansion coefficient of the two phases can be. In addition to the lower cost of the second phase material, traditional low cost ceramic processing techniques such as tape casting and air-sintering can be used to fabricate the composite membrane devices. The composite membrane was evaluated for hydrogen permeation and thermochemical stability. |
|
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 |