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https://hdl.handle.net/2440/118545
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Type: | Journal article |
Title: | Oxygen permeability and structure stability of a novel cobalt-free perovskite Gd0.33Ba0.67FeO3−δ |
Author: | Wang, Y. Liao, Q. Zhou, L. Wang, H. |
Citation: | Journal of Membrane Science, 2014; 457:82-87 |
Publisher: | Elsevier |
Issue Date: | 2014 |
ISSN: | 0376-7388 1873-3123 |
Statement of Responsibility: | Yanjie Wang, Qing Liao, Lingyi Zhou, Haihui Wang |
Abstract: | A novel cobalt-free perovskite oxide based on Gd0.33Ba0.67FeO3−δ (GBF) was successfully prepared through a complexing method. X-ray diffraction (XRD) results reveal that the GBF possesses good structure and phase reversibility under low oxygen partial pressures and reducing atmosphere. The GBF membrane was steadily operated for 400 h using He as the sweep gas. The oxygen fluxes are 0.40, 0.34 and 0.29 ml/(cm2 min) for the membrane at 975, 950 and 925 °C, respectively. The reactor constructing by the GBF membrane was used for the partial oxidation of methane (POM) to syngas. The GBF membrane reactor for the POM was successfully operated for 428 h at 950 °C. The CH4 conversion of 94% and the CO selectivity of 95% with the oxygen flux of 5.6 ml/(cm2 min) are obtained. XRD, scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDX) characterizations indicate that the GBF membrane exhibits good phase structure stability for the membrane even after long-term operation under syngas production conditions. |
Keywords: | Perovskite; oxygen permeation; stability; POM; membrane reactor |
Rights: | © 2014 Elsevier B.V. All rights reserved. |
DOI: | 10.1016/j.memsci.2014.01.046 |
Published version: | http://dx.doi.org/10.1016/j.memsci.2014.01.046 |
Appears in Collections: | Aurora harvest 4 Chemical Engineering publications |
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