Abstract
La 0.6 Sr 0.4 Ti 0.3 Fe 0.7 O 3-δ (LSTF) coated Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ (BSCF) membranes which has properties of high oxygen permeability and stability to CO 2 were applied to a bench scale apparatus to conduct oxygen permeation experiments. Also, the membranes of the laboratory and the bench scale device were divided into three regions according to the temperature gradient in the membrane reactor for comparative analysis. While oxygen permeation experiment were conducted up to 900 o C, temperature dependence of Cr deposition was investigated. As a result, it was confirmed that the oxygen permeability was 2.37 ml/min·cm 2 , which was significantly lower than 3.79 ml/min·cm 2 measured in the laboratory apparatus. It was found through XRD and SEM/EDS analysis that the decrease in oxygen permeability was originated from the deposition of gaseous Cr on the membrane surface released from the alloy material of the housing. In particular, a large amount of Cr was found in the medium temperature region.
Original language | English |
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Pages (from-to) | 11-16 |
Number of pages | 6 |
Journal | Korean Chemical Engineering Research |
Volume | 57 |
Issue number | 1 |
DOIs | |
State | Published - Feb 2019 |
Keywords
- BSCF
- Cr impurity
- Membrane
- Oxygen separation
- Perovskite