Improved performance of barium cobalt-based perovskites materials: Influence of B-site substitution and metal oxide supported perovskite on oxygen desorption property and reactivity
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Oxy-fuel combustion is one of the proposed technologies which have the potential to achieve a zero CO2 emission. To enhancethe oxygen production performance of the oxygen carrier, different LaBO3-δ (B=Co, Ni, Fe, Cr) and metal oxide (CeO2, Al2O3,ZrO2) supported BaCoO3-δ perovskites have been successfully synthesized by the EDTA sol-gel method and further applied forproducing oxygen. The oxygen desorption/production performance of synthesized perovskites were studied in a fixed-bedreactor system. Furthermore, the effects of H2O and air as regeneration gas of metal oxide supported BaCoO3-δ perovskiteoxygen carrier were investigated in detail. Results shows that the oxygen desorption amount of different B-site substitutedLaBO3-δ (B=Co, Ni, Fe, Cr) perovskites decrease in the order of LaNiO3-δ > LaCoO3-δ > LaCrO3-δ > LaFeO3-δ.While comparedwith pure BaCoO3-δ and different metal oxide supported BaCoO3-δ, CeO2 supported BaCoO3-δ features higher productionamount of oxygen. Multiple cycles demonstrated that BaCoO3/CeO2 displays higher stability and regeneration capacity, whichis the key factor to provide stable O2/CO2 gas stream for oxyfuel combustion application. In short, the novel BaCoO3/CeO2oxygen carrier developed in this work exhibits high oxygen desorption capacity and stability. In addition, it provides apromising potential for oxygen production in industrial application.
Abstract
Oxy-fuel combustion is one of the proposed technologies which have the potential to achieve a zero CO2 emission. To enhancethe oxygen production performance of the oxygen carrier, different LaBO3-δ (B=Co, Ni, Fe, Cr) and metal oxide (CeO2, Al2O3,ZrO2) supported BaCoO3-δ perovskites have been successfully synthesized by the EDTA sol-gel method and further applied forproducing oxygen. The oxygen desorption/production performance of synthesized perovskites were studied in a fixed-bedreactor system. Furthermore, the effects of H2O and air as regeneration gas of metal oxide supported BaCoO3-δ perovskiteoxygen carrier were investigated in detail. Results shows that the oxygen desorption amount of different B-site substitutedLaBO3-δ (B=Co, Ni, Fe, Cr) perovskites decrease in the order of LaNiO3-δ > LaCoO3-δ > LaCrO3-δ > LaFeO3-δ.While comparedwith pure BaCoO3-δ and different metal oxide supported BaCoO3-δ, CeO2 supported BaCoO3-δ features higher productionamount of oxygen. Multiple cycles demonstrated that BaCoO3/CeO2 displays higher stability and regeneration capacity, whichis the key factor to provide stable O2/CO2 gas stream for oxyfuel combustion application. In short, the novel BaCoO3/CeO2oxygen carrier developed in this work exhibits high oxygen desorption capacity and stability. In addition, it provides apromising potential for oxygen production in industrial application.
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