INCAPE 05401
INSTITUTO DE INVESTIGACIONES EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Unidad Ejecutora - UE
artículos
Título:
CuO-CeO2/SiO2 coating on ceramic monolith: Effect of the nature of the catalyst support on CO preferential oxidation in a H2-rich stream
Autor/es:
LACOSTE, ALBANO M.; TISCORNIA, INÉS S.; BOIX, ALICIA V.; GÓMEZ, LETICIA E.
Revista:
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Año: 2020 vol. 45 p. 6636 - 6650
ISSN:
0360-3199
Resumen:
Powder and structured catalysts based on CuO-CeO2 nanoparticlesdispersed on different silica are studied in CO preferential oxidation.Silica of natural origin (celite) and fumed silica (aerosil), bothcommercial materials, and synthesized mesoporous SBA-15 with 20, 200 and650 m2g-1 respectively, are selected as supports. CuCe/celite coated oncordierite monolith displays the highest activity, reaching CO conversionabove 90% between 140-210 °C and more than 99% around 160 °C. Theaddition of 10% CO2 and 10% H2O partially deactivates the monolithiccatalyst.The lower surface area of CuCe/celite favors the contact between CuO andCeO2 nanoparticles promoting a better interaction of Cu+2/Cu+ andCe+3/Ce+4 redox couples. Raman spectroscopy reveals oxygen vacancies andXPS results show high metal lattice surface oxygen concentration andsurface enrichment of Cu and Ce which promote the catalytic activity.
