TY - JOUR
T1 - Ce0.8Sm0.15Sr0.05O2 as Possible Oxidation Catalyst and Assessment of the CaO Addition in the Coupled CO Oxidation-CO2 Capture Process
AU - Ovalle-Encinia, Oscar
AU - Mendoza-Nieto, J. Arturo
AU - Ortiz-Landeros, José
AU - Pfeiffer, Heriberto
N1 - Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/5/31
Y1 - 2017/5/31
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85020923625&partnerID=8YFLogxK
U2 - 10.1021/acs.iecr.6b04872
DO - 10.1021/acs.iecr.6b04872
M3 - Artículo
SN - 0888-5885
VL - 56
SP - 6124
EP - 6130
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 21
ER -