Details
| Original language | English |
|---|---|
| Pages (from-to) | 90-96 |
| Number of pages | 7 |
| Journal | Journal of membrane science |
| Volume | 343 |
| Issue number | 1-2 |
| Early online date | 15 Jul 2009 |
| Publication status | Published - 1 Nov 2009 |
Abstract
A mixed proton-electron conducting perovskite made of BaCe0.95Nd0.05O3-δ (BCN) was prepared by EDTA/citric acid complexing method. The precursor was characterized by differential scanning calorimetry (DSC), thermogravimetry (TG), and X-ray diffraction (XRD). In order to learn the perovskite formation process during the calcination, the intermediate, i.e. the sample calcined at 750 °C for 5 h, was investigated by scanning (STEM), energy-filtered (EFTEM), and high-resolution transmission electron microscopy (HRTEM) as well as electron energy-loss spectroscopy (EELS). The results revealed that the perovskite structure was formed via a solid-state reaction between barium-cerium mixed carbonate and cerium-neodymium mixed oxide particles. Dense mixed proton-electron conducting BCN membranes were made by pressing BCN powder followed by sintering. The microstructure of the sintered membranes was investigated by scanning electron microscopy (SEM). Hydrogen permeation through the BCN membrane was studied using a high-temperature permeator. The hydrogen permeation fluxes under wet conditions are higher than those under dry conditions, which is due to increased proton concentrations in the H+ hopping via OH groups. The hydrogen permeation increased with increasing hydrogen and steam concentrations in the feed. For a steam concentration of 15 vol.%, the hydrogen permeation flux reaches 0.026 ml/min cm2.
Keywords
- Hydrogen energy, Membrane, Mixed conductor, Perovskite
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)
- Biochemistry
- Materials Science(all)
- General Materials Science
- Chemistry(all)
- Physical and Theoretical Chemistry
- Chemical Engineering(all)
- Filtration and Separation
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In: Journal of membrane science, Vol. 343, No. 1-2, 01.11.2009, p. 90-96.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Preparation and hydrogen permeation of BaCe0.95Nd0.05O3-δ membranes
AU - Cai, Mingya
AU - Liu, Song
AU - Efimov, Konstantin
AU - Caro, Jürgen
AU - Feldhoff, Armin
AU - Wang, Haihui
N1 - Funding Information: The authors greatly acknowledge the financial support by National Natural Science Foundation of China (nos. 20706020, U0834004), by the Program for New Century Excellent Talents in University (no. NECT-07-0307), Fok Ying Tung Education Foundation (no. 114019), New Teacher Fund of Ministry of Education of China (no. 20070561032) and by the National Basic Research Program of China (no. 2009CB623406).
PY - 2009/11/1
Y1 - 2009/11/1
N2 - A mixed proton-electron conducting perovskite made of BaCe0.95Nd0.05O3-δ (BCN) was prepared by EDTA/citric acid complexing method. The precursor was characterized by differential scanning calorimetry (DSC), thermogravimetry (TG), and X-ray diffraction (XRD). In order to learn the perovskite formation process during the calcination, the intermediate, i.e. the sample calcined at 750 °C for 5 h, was investigated by scanning (STEM), energy-filtered (EFTEM), and high-resolution transmission electron microscopy (HRTEM) as well as electron energy-loss spectroscopy (EELS). The results revealed that the perovskite structure was formed via a solid-state reaction between barium-cerium mixed carbonate and cerium-neodymium mixed oxide particles. Dense mixed proton-electron conducting BCN membranes were made by pressing BCN powder followed by sintering. The microstructure of the sintered membranes was investigated by scanning electron microscopy (SEM). Hydrogen permeation through the BCN membrane was studied using a high-temperature permeator. The hydrogen permeation fluxes under wet conditions are higher than those under dry conditions, which is due to increased proton concentrations in the H+ hopping via OH groups. The hydrogen permeation increased with increasing hydrogen and steam concentrations in the feed. For a steam concentration of 15 vol.%, the hydrogen permeation flux reaches 0.026 ml/min cm2.
AB - A mixed proton-electron conducting perovskite made of BaCe0.95Nd0.05O3-δ (BCN) was prepared by EDTA/citric acid complexing method. The precursor was characterized by differential scanning calorimetry (DSC), thermogravimetry (TG), and X-ray diffraction (XRD). In order to learn the perovskite formation process during the calcination, the intermediate, i.e. the sample calcined at 750 °C for 5 h, was investigated by scanning (STEM), energy-filtered (EFTEM), and high-resolution transmission electron microscopy (HRTEM) as well as electron energy-loss spectroscopy (EELS). The results revealed that the perovskite structure was formed via a solid-state reaction between barium-cerium mixed carbonate and cerium-neodymium mixed oxide particles. Dense mixed proton-electron conducting BCN membranes were made by pressing BCN powder followed by sintering. The microstructure of the sintered membranes was investigated by scanning electron microscopy (SEM). Hydrogen permeation through the BCN membrane was studied using a high-temperature permeator. The hydrogen permeation fluxes under wet conditions are higher than those under dry conditions, which is due to increased proton concentrations in the H+ hopping via OH groups. The hydrogen permeation increased with increasing hydrogen and steam concentrations in the feed. For a steam concentration of 15 vol.%, the hydrogen permeation flux reaches 0.026 ml/min cm2.
KW - Hydrogen energy
KW - Membrane
KW - Mixed conductor
KW - Perovskite
UR - http://www.scopus.com/inward/record.url?scp=68949169095&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2009.07.011
DO - 10.1016/j.memsci.2009.07.011
M3 - Article
AN - SCOPUS:68949169095
VL - 343
SP - 90
EP - 96
JO - Journal of membrane science
JF - Journal of membrane science
SN - 0376-7388
IS - 1-2
ER -