Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 210, Issue -, Pages 900-906Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.seppur.2018.09.001
Keywords
Perovskite membrane; Oxygen permeation; Nitric oxide; Oxy-fuel combustion
Categories
Funding
- Tianjin Research Program of Application Foundation and Advanced Technology [17JCZDJC36900]
- National Natural Science Foundation of China [21776219]
- Science and Technology Plans of Tianjin [16FTSYJC00090]
- China Postdoctoral Science Foundation [2018M631746]
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Mixed conducting perovskite membrane has been intensively investigated as a possible new technology for oxygen production to replace the conventional cryogenic distillation which is capital and energy intensive. The perovskite membrane has the potential to be applied in the clean energy projects like oxy-fuel coal combustion if the membrane can withstand the real application conditions. Nitric oxide (NO) is an inevitable ingredient of flue gas from power plants, and it is important to understand the possible influence from NO on the perovskite membranes for producing pure oxygen for oxy-fuel project where the flue gas would be used as the sweep gas for the membrane operation. The influence of NO on the oxygen permeation properties of La(0.6)Sro(0.4)Co(0.2)Fe(0.8)O(3) (-) (delta) (LSCF) perovskite membrane is investigated by a variety of characterization techniques. The results indicate that the oxygen permeability of the LSCF membrane decreases significantly at the temperature below 900 degrees C. XRD, SEM and SEM-EDX characterizations indicate the generation of another porous phase damaging the membrane and accounting for the oxygen flux decrease. However, the negative effect from NO on the oxygen permeation would disappear when the temperature is elevated above 900 degrees C, on which NO would be decomposed to nitrogen and oxygen and no longer negatively influences the membrane.
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