Synthesis and experimental study of improved double perovskite-type PrBaCo2O5+δ materials to produce oxygenenriched CO2 for oxyfuel combustion application
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Perovskite oxides are promising oxygen carrier materials to produce O2/CO2 gas for oxyfuel combustion application. In thisstudy, PrBaCo2O5+δ double perovskite oxide was prepared by the EDTA sol-gel method and first applied as oxygen carrier foroxygen production. The oxygen adsorption/desorption performance of PrBaCo2O5+δ perovskite was carrried out in a fixed-bedset-up. The operating factors of oxygen releasing performance were investigated in detail including adsorption temperature,desorption temperature, CO2 volumetric flow rate, and CO2 partial pressure. Due to the kinetic effects of gas-solid reactions,it is found that the adsorption and desorption temperature has greatly influence on the oxygen production performance. Thesurface morphology was observed by scanning electron microscope (SEM). In addition, the cyclic performance of PrBaCo2O5+δunder the optimal operating condition was examined. The oxygen production amount was reduced slightly from 110.9 mg/gperovskite to 99.2 mg/g after 8 cycles’ test. Therefore, the results indicated that PrBaCo2O5+δ has good stability and reactivityfor cyclic use.
Abstract
Perovskite oxides are promising oxygen carrier materials to produce O2/CO2 gas for oxyfuel combustion application. In thisstudy, PrBaCo2O5+δ double perovskite oxide was prepared by the EDTA sol-gel method and first applied as oxygen carrier foroxygen production. The oxygen adsorption/desorption performance of PrBaCo2O5+δ perovskite was carrried out in a fixed-bedset-up. The operating factors of oxygen releasing performance were investigated in detail including adsorption temperature,desorption temperature, CO2 volumetric flow rate, and CO2 partial pressure. Due to the kinetic effects of gas-solid reactions,it is found that the adsorption and desorption temperature has greatly influence on the oxygen production performance. Thesurface morphology was observed by scanning electron microscope (SEM). In addition, the cyclic performance of PrBaCo2O5+δunder the optimal operating condition was examined. The oxygen production amount was reduced slightly from 110.9 mg/gperovskite to 99.2 mg/g after 8 cycles’ test. Therefore, the results indicated that PrBaCo2O5+δ has good stability and reactivityfor cyclic use.
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