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- W3166458208 abstract "Molten salt-ceramic dual-phase membranes have great prospects in the selective separation of nitrogen oxides. A gas-tight KNO3–Ba0.5Sr0·5Co0·8Fe0·2O3-δ (KNO3-BSCF) four-channel hollow fiber membrane was developed in this study. A wide operating temperature window of 350–500 °C with high nitrogen oxides permeance was achieved. The maximum nitrogen oxides permeance reached 9.2 × 10−9 mol m−2 s−1 Pa−1 under the condition of 1% NO2, 1% CO2 and 20% O2 at 500 °C. The presence of nitrogen oxides was able to suppress the reaction of BSCF oxide with CO2 to form carbonates. Insights on the transport mechanism of nitrogen oxides transport were provided and the existence of nitrite route for nitrogen oxides transport was firstly demonstrated by experiments. An 1800 h long-term nitrogen oxides permeation was running on the KNO3-BSCF hollow fiber membrane while the permeance increased by a factor of ~40 (5.2 × 10−10 mol m−2 s−1 Pa−1 to 2.2 × 10−8 mol m−2 s−1 Pa−1 at 450 °C) due to the partial decomposition of nitrate into nitrite. This nitrite route was also verified in KNO3/KNO2-BSCF hollow fiber membrane constructed by preloading 30 wt% nitrite in molten salt." @default.
- W3166458208 created "2021-06-22" @default.
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- W3166458208 date "2021-10-01" @default.
- W3166458208 modified "2023-10-17" @default.
- W3166458208 title "Fabrication of molten nitrate/nitrite dual-phase four-channel hollow fiber membranes for nitrogen oxides separation" @default.
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- W3166458208 doi "https://doi.org/10.1016/j.memsci.2021.119506" @default.
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