Ce0.8Sm0.15Sr0.05O2 as Possible Oxidation Catalyst and Assessment of the CaO Addition in the Coupled CO Oxidation-CO2 Capture Process

Oscar Ovalle-Encinia, J. Arturo Mendoza-Nieto, José Ortiz-Landeros, Heriberto Pfeiffer

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

6 Citas (Scopus)

Resumen

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 system. The results for the CSSO1000-CaO system evidenced simultaneous double process produced by the synergetic CO oxidation at temperatures between 350 and 650 °C and the CO2 chemisorption on the CaO. Furthermore, the combined materials reduce the different temperature processes probably due to the CaO partial catalytic activity.

Idioma originalInglés
Páginas (desde-hasta)6124-6130
Número de páginas7
PublicaciónIndustrial and Engineering Chemistry Research
Volumen56
N.º21
DOI
EstadoPublicada - 31 may. 2017
Publicado de forma externa

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