Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7021059 | Journal of Membrane Science | 2015 | 23 Pages |
Abstract
The influence of chromium in metal components on oxygen permeation and microstructure of BaCo0.7Fe0.2Nb0.1O3âδ(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
Authors
Yuwen Zhang, Chenchen Yu, Lili Zhang, Kun Su, Chengzhang Wu, Weizhong Ding, Xionggang Lu,