Efeito da adição de lantânio em catalisadores de Ni/ZrO 2 aplicados na reação de reforma a vapor de etanol

Abstract

The catalytic performance of Ni/ZrO 2 catalysts loaded with different lanthanum content for steam reforming of ethanol was investigated. Catalysts were characterized by BET surface area, X-ray diffraction, UV-vis spectroscopy, temperature programmed reduction, and X-ray absorption fne structure techniques. Results showed that lanthanum addition led to an increase in the degree of reduction of both NiO and nickel surface species interacting with the support, due to the higher dispersion effect. The best catalytic performance at 450 °C was found for the Ni/12LZ catalyst, which exhibited an effuent gaseous mixture with the highest H 2 yield.