LAUSR

A synergetic system for the coupled CO oxidation and CO2 trapping was proposed and studied in the present work by using a ceria-based material and CaO as catalyst and absorbent, respectively. Specifically, Ce0.8Sm0.15Sr0.05O2 (CSSO) was synthesized by the EDTA–citrate complexing method and the resultant powders were characterized by XRD, SEM, and N2 adsorption–desorption measurements. The structure was identified as a fluorite phase, and the BET analysis showed specific areas of 25.6 and 2.6 m2/g for the samples heat-treated at 650 and 1000 °C, respectively. Dynamic thermogravimetric analyses performed under CO2, CO, CO–O2, and O2 containing atmospheres showed the thermal stability and reactivity of the ceria-based catalyst. Then, the CO oxidation tests were evaluated in two stages: first, the dynamic and isothermal analyses for the CO oxidation by the CSSO treated at 650 and 1000 °C; then, the evaluation of the CO oxidation properties of the proposed catalyst with in situ CO2 capture by adding CaO to the...