引用本文:
Hui Xia Luo, Ling Hui Yu, Xin Zhi Chen, Hai Hui Wang, JÜrgen Caro. Novel Ba0.5Sr0.5Fe0.8Zn0.2O3-δ membranes for POM[J]. Chinese Chemical Letters,
2009, 20(2): 250-252.
doi:
10.1016/j.cclet.2008.10.011
Citation: Hui Xia Luo, Ling Hui Yu, Xin Zhi Chen, Hai Hui Wang, JÜrgen Caro. Novel Ba0.5Sr0.5Fe0.8Zn0.2O3-δ membranes for POM[J]. Chinese Chemical Letters, 2009, 20(2): 250-252. doi: 10.1016/j.cclet.2008.10.011

Citation: Hui Xia Luo, Ling Hui Yu, Xin Zhi Chen, Hai Hui Wang, JÜrgen Caro. Novel Ba0.5Sr0.5Fe0.8Zn0.2O3-δ membranes for POM[J]. Chinese Chemical Letters, 2009, 20(2): 250-252. doi: 10.1016/j.cclet.2008.10.011

Novel Ba0.5Sr0.5Fe0.8Zn0.2O3-δ membranes for POM
摘要:
A novel cobalt-free perovskite based on Ba0.5Sr0.5Fe0.8Zn0.2O3-δ (BSFZ) were prepared by EDTA-citric acid method. The lattice constants of the BSFZ perovskite were characterized by in situ high-temperature X-ray diffraction (HTXRD). The thermal expansion coefficient of BSFZ is 10.5×10-6 K-1, which is lower than that of cobalt-based perovskite materials. The BSFZ membrane was also used to construct reactors for the partial oxidation of methane (POM) to syngas. Results show that the BSFZ membrane can be operated for the POM reaction for more than 100 h without any fractures. The CO selectivity of 97% is obtained.The steady oxygen permeation flux reaches around 2.5 mL/min cm2 during POM reaction.
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关键词:
- Membrane
- / Oxygen separation
- / Mixed conductor
- / Perovskite
- / POM
English
Novel Ba0.5Sr0.5Fe0.8Zn0.2O3-δ membranes for POM
Abstract:
A novel cobalt-free perovskite based on Ba0.5Sr0.5Fe0.8Zn0.2O3-δ (BSFZ) were prepared by EDTA-citric acid method. The lattice constants of the BSFZ perovskite were characterized by in situ high-temperature X-ray diffraction (HTXRD). The thermal expansion coefficient of BSFZ is 10.5×10-6 K-1, which is lower than that of cobalt-based perovskite materials. The BSFZ membrane was also used to construct reactors for the partial oxidation of methane (POM) to syngas. Results show that the BSFZ membrane can be operated for the POM reaction for more than 100 h without any fractures. The CO selectivity of 97% is obtained.The steady oxygen permeation flux reaches around 2.5 mL/min cm2 during POM reaction.
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Key words:
- Membrane
- / Oxygen separation
- / Mixed conductor
- / Perovskite
- / POM

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