INCAPE   05401
INSTITUTO DE INVESTIGACIONES EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Unidad Ejecutora - UE
artículos
Título:
Synthesis and Characterization of Electrospun Nanofibers of Sr-La-Ce Oxides as Catalysts for the Oxidative Coupling of Methane
Autor/es:
SOLLIER, BRENDA M.; MICHELIN, LAURE; BOIX, ALICIA V.; BONNE, MAGALI; MIRÓ, EDUARDO E.; LEBEAU, BÉNÉDICTE; KHENOUSSI, NABYL; GÓMEZ, LETICIA E.
Revista:
INDUSTRIAL & ENGINEERING CHEMICAL RESEARCH
Editorial:
AMER CHEMICAL SOC
Referencias:
Lugar: Washington; Año: 2020
ISSN:
0888-5885
Resumen:
Catalytic nanofibers composed of La-Ce and Sr-La-Ce oxides were synthetized byelectrospinning method with 5 wt.% of Sr and different La/Ce molar ratios. The materials were obtained by calcining electrospun polymer composite fibers and were studied for the oxidative coupling of methane (OCM). The catalytic performance was compared with analogous Sr-La-Ce powder catalysts.SEM micrographs of Sr-La-Ce fibers (La/Ce: 0.1, 0.2, 1 and 3) showed nanostructures with homogenous and uniform diameters (170-200 nm). In addition, the XRD patterns revealed the formation of crystalline solid solutions like LaxCeyOz. The strontium enhanced the CH4 conversion and C2 selectivity, since it possibly generated structural defects that promote the formation of superoxide species. The SrLaCe3 nanofibers reached a CH4 conversion of 28.5 % and C2 yield of 21.7 % at 600 ºC. The nanofibers randomly packed improved the heat and mass transfer properties due to a high geometric surface ratio with high bed porosity.