| 内容提要: |
YBC114 has both the ability of temperature swinging oxygen absorption/desorption (TSA) and the property of pressure swinging oxygen absorption/desorption (PSA) in the temperature range of 200–400 C. The XRD patterns show that YBC114 has a good stability in both the O2-containing and CO2-containing atmosphere at 200–400 C. Cyclic operation for the low temperature O2-enriched CO2 stream production indicates that YBC114 has high cyclic stability. The absorption/desorption kinetics can be improved by
combining PSA with TSA at no cost of the O2 absorption capacity. For such a design, oxygen is absorbed when YBC114 is heated from 200 C to 345 ℃ with a slow ramping rate in an air stream. Oxygen is desorbed and an oxygen-enriched carbon dioxide stream is obtained when YBC114 is exposed in a carbon dioxide stream and cooled from 345 ℃ to 200 ℃. It has been found that the synthesis method of theYBC114 also has a significant effect on the oxygen absorption/desorption kinetics. |