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Dopant properties of the BaCeO3-based proton conductor for hydrogen separation

Heidari, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. Abstract:
  3. As the demand for hydrogen increases, a practical way of separating pure hydrogen from a gas mixture, e.g., synthesis gas, is becoming more important. Among the various separation techniques, dense membranes with mixed protonic-electronic conductors offer a simple way for obtaining hydrogen from gas streams at high temperatures. The hydrogen permeation and stability of BaCe0.8Y0.1M0.1O3-δ (M= Fe, Ni, Co, Yb) perovskite-type membranes were studied at high temperatures. A single phase perovskite structure with orthorhombic configuration for all membranes was observed. For BaCe0.8Y0.1M0.1O3-δ (M = Ni, Yb) membrane, the permeation flux increased by increasing temperature due to the higher ambipolar conductivity at elevated temperatures. All membranes were dense with a clear grain size, which is suitable for permeation tests
  4. Keywords:
  6. Source: CHISA 2012 - 20th International Congress of Chemical and Process Engineering and PRES 2012 - 15th Conference PRES 2012 ; 2012