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每周分享：oxygen permeability and structure stability of a novel cobalt-free perovskite gd0.33ba0.67feo3−δ

今天给大家分享的是2014年5月份 《journal of membrane science》上发表的一篇名为：oxygen permeability and structure stability of a novel cobalt-free perovskite gd0.33ba0.67feo3−δ

文章摘要如下：

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.

该文章中材料表征采用的是美国麦克仪器autochem 2920

详情可参考下面链接：

http://www.sciencedirect.com/science/article/pii/s0376738814000593