New Triclinic Perovskite-Type Oxide Ba5CaFe4O12 for Low-Temperature Operated Chemical Looping Air Separation

New Triclinic Perovskite-Type Oxide Ba5CaFe4O12 for Low-Temperature Operated Chemical Looping Air Separation

We present the discovery of Ba5CaFe4O12, a new iron-based oxide with remarkable properties as a low-temperature driven oxygen storage material (OSM). OSMs, which exhibit selective and rapid oxygen intake and release capabilities, have attracted considerable attention in chemical looping technologies...

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Veröffentlicht in:Journal of the American Chemical Society 2023-10, Vol.145 (41), p.22788-22795
Hauptverfasser: Ogawa, Satoshi, Tamura, Sayaka, Yamane, Hisanori, Tanabe, Toyokazu, Saito, Miwa, Motohashi, Teruki
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container_end_page 22795
container_issue 41
container_start_page 22788
container_title Journal of the American Chemical Society
container_volume 145
creator Ogawa, Satoshi
Tamura, Sayaka
Yamane, Hisanori
Tanabe, Toyokazu
Saito, Miwa
Motohashi, Teruki
description We present the discovery of Ba5CaFe4O12, a new iron-based oxide with remarkable properties as a low-temperature driven oxygen storage material (OSM). OSMs, which exhibit selective and rapid oxygen intake and release capabilities, have attracted considerable attention in chemical looping technologies. Specifically, chemical looping air separation (CLAS) has the potential to revolutionize oxygen production as it is one of the most crucial industrial gases. However, the challenge lies in utilizing OSMs for energy-efficient CLAS at lower temperatures. Ba5CaFe4O12, a cost-competitive material, possesses an unprecedented 5-fold perovskite-type A 5 B 5O15−δ structure, where both Fe and Ca occupy the B sites. This distinctive structure enables excellent oxygen intake/release properties below 400 °C. This oxide demonstrates the theoretical daily oxygen production rate of 2.41 mO2 3 kgOSM –1 at 370 °C, surpassing the performance of the previously reported material, Sr0.76Ca0.24FeO3−δ (0.81 mO2 3 kgOSM –1 at 550 °C). This discovery holds great potential for reducing costs and enhancing the energy efficiency in CLAS.
doi_str_mv 10.1021/jacs.3c08691
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OSMs, which exhibit selective and rapid oxygen intake and release capabilities, have attracted considerable attention in chemical looping technologies. Specifically, chemical looping air separation (CLAS) has the potential to revolutionize oxygen production as it is one of the most crucial industrial gases. However, the challenge lies in utilizing OSMs for energy-efficient CLAS at lower temperatures. Ba5CaFe4O12, a cost-competitive material, possesses an unprecedented 5-fold perovskite-type A 5 B 5O15−δ structure, where both Fe and Ca occupy the B sites. This distinctive structure enables excellent oxygen intake/release properties below 400 °C. This oxide demonstrates the theoretical daily oxygen production rate of 2.41 mO2 3 kgOSM –1 at 370 °C, surpassing the performance of the previously reported material, Sr0.76Ca0.24FeO3−δ (0.81 mO2 3 kgOSM –1 at 550 °C). 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title New Triclinic Perovskite-Type Oxide Ba5CaFe4O12 for Low-Temperature Operated Chemical Looping Air Separation
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