Hydrogen separation through tailored dual phase membranes with nominal composition BaCe0.8Eu0.2O3-δ:Ce0.8Y0.2O2-δat intermediate temperatures.
Hydrogen permeation membranes are a key element in improving the energy conversion efficiency and decreasing the greenhouse gas emissions from energy generation. The scientific community faces the challenge of identifying and optimizing stable and effective ceramic materials for H2separation membranes at elevated temperature (400-800 °C) for industrial separations and intensified catalytic reactors. As such, composite materials with nominal composition BaCe0.8Eu0.2O3-δ:Ce0.8Y0.2O2-δrevealed unprecedented H2permeation levels of 0.4 to 0.61 mL·min-1·cm-2at 700 °C measured on 500 μm-thick-specimen. A detailed structural and phase study revealed single phase perovskite and fluorite starting materials synthesized via the conventional ceramic route. Strong tendency of Eu to migrate from the perovskite to the fluorite phase was observed at sintering temperature, leading to significant Eu depletion of the proton conducing BaCe0.8Eu0.2O3-δphase. Composite microstructure was examined prior and after a variety of functional tests, including electrical conductivity, H2-permeation and stability in CO2containing atmospheres at elevated temperatures, revealing stable material without morphological and structural changes, with segregation-free interfaces and no further diffusive effects between the constituting phases. In this context, dual phase material based on BaCe0.8Eu0.2O3-δ:Ce0.8Y0.2O2-δrepresents a very promising candidate for H2separating membrane in energy- and environmentally-related applications.
Institute of Energy and Climate Research IEK-1, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany.
Mariya E
ME
Ivanova
Instituto de Tecnología Química, Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas, Av. Naranjos s/n, E-46022 Valencia, Spain.
Sonia
S
Escolástico
Institute of Energy and Climate Research IEK-1, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany.
Maria
M
Balaguer
Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons ER-C, Forschungszentrum Jülich GmbH, D-52425 Jülich and Central Facility for Electron Microscopy GFE, RWTH Aachen University, 52074 Aachen, Germany.
Justinas
J
Palisaitis
Institute of Energy and Climate Research IEK-1, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany.
Yoo Jung
YJ
Sohn
Institute of Energy and Climate Research IEK-1, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany.
Wilhelm A
WA
Meulenberg
Institute of Energy and Climate Research IEK-1, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany.
Olivier
O
Guillon
Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons ER-C, Forschungszentrum Jülich GmbH, D-52425 Jülich and Central Facility for Electron Microscopy GFE, RWTH Aachen University, 52074 Aachen, Germany.
Joachim
J
Mayer
Instituto de Tecnología Química, Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas, Av. Naranjos s/n, E-46022 Valencia, Spain.
Jose M
JM
Serra