Article ID Journal Published Year Pages File Type
7021059 Journal of Membrane Science 2015 23 Pages PDF
Abstract
The influence of chromium in metal components on oxygen permeation and microstructure of BaCo0.7Fe0.2Nb0.1O3−δ(BCFNO) membrane was investigated under the condition of the oxygen-permeable membrane reactors. In the presence of chromia-forming metal components, the oxygen permeation flux decreased by about 2.4% and 10% when using dry air and humidified air (4% H2O) for 100 h at 850 °C, respectively. In the presence of chromia-forming alloys on the permeate side, the oxygen permeation flux decreased by 7% within 100 h. Due to the deposition of volatile Cr species from chromia-forming alloys and formation of spinel phases of BaCrO4 and BaCr2O4 on the membrane surfaces, the performance of the membrane reactors deteriorated continuously as a function of time. Poisoning of chromium species is also a critical issue for the application of MIEC oxygen-permeable membrane reactors.
Related Topics
Physical Sciences and Engineering Chemical Engineering Filtration and Separation
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