info:eu-repo/semantics/article
Effect of EDTA in preparation of Ni catalysts toward a carbon-resistant ethanol reforming
Fecha
2020-05Registro en:
Villagran Olivares, Alejandra Catalina; Gomez, Manuel Francisco; Lopez, Carlos Alberto; Barroso, Mariana Noelia; Abello, Maria Cristina; Effect of EDTA in preparation of Ni catalysts toward a carbon-resistant ethanol reforming; Elsevier Science; Applied Catalysis B: Environmental; 264; 5-2020; 1-8
0926-3373
CONICET Digital
CONICET
Autor
Villagran Olivares, Alejandra Catalina
Gomez, Manuel Francisco
Lopez, Carlos Alberto
Barroso, Mariana Noelia
Abello, Maria Cristina
Resumen
Ni supported catalysts were prepared by an EDTA complexing method with different EDTA/Ni molar ratios: 0, 0.5, 1 and 2. The catalysts were characterised by X-ray diffraction, adsorption-desorption isotherms of N2, infrared spectroscopy, thermogravimetric analysis, temperature programmed reduction and X-ray photoelectron spectroscopy. All the catalysts prepared with EDTA presented a decrease in the NiO particle size of around 60 % with respect to the sample obtained in the absence of a chelating agent. Besides, the EDTA/Ni = 1 catalyst corresponding to the complete Ni chelation showed a Ce3+/Ce4+ high surface ratio. The greater extent of surface reduction of CeO2 suggests changes in the NiO-CeO2 interaction induced by the presence of the chelating agent during preparation. The NiEDTA(1) sample showed the best performance in the ethanol steam reforming reaction at 650 °C. An ethanol conversion of 100 % was reached after seven hours in reaction with a high yield of hydrogen (5.4 mol H2/molC2H5OH) and a low carbon deposition rate (1.4 mgC/gcat h).