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An effective approach for reducing CO2 emissions from marine exhaust is adopting oxyfuel combustion technology. A series of B-site doped BaCo0.8B0.2O3−δ (B=Ce, Al, Fe, Cu) perovskites as novel oxygen carrier applications were prepared by the sol-gel method. The oxygen desorption characteristics of the B-site doped BaCo0.8B0.2O3−δ perovskites and the effects of adsorption/desorption temperature, CO2 volume flow rate, CO2 partial pressures, and adsorption time were researched in the fixed bed reactor. The surface morphology and size of the oxygen carrier was observed by scanning electron microscope (SEM). Results showed that BaCo0.8Al0.2O3−δ and BaCo0.8Ce0.2O3−δ have comparable performance, considering the cost of the raw materials. BaCo0.8Al0.2O3−δ was selected as candidate for further study. The optimal adsorption/desorption temperature, CO2 volume flow rate, CO2 partial pressure and adsorption time for BaCo0.8Al0.2O3−δ were studied in detail. Results showed that the best operating parameters were determined to be 850 °C/850 °C for adsorption/desorption temperature, 200 mL/min for CO2 volume flow rate, 100% CO2 partial pressure, and 30 min for absorption time, respectively. Furthermore, multiple cycle results indicate that BaCo0.8Al0.2O3−δ sorbent has high reactivity and cyclic stability.

Experimental Study of O2-Enriched CO2 Production by BaCo0.8B0.2O3−δ (B=Ce, Al, Fe, Cu) Perovskites Sorbent for Marine Exhaust CO2 Capture Application