Estudo da oxidação total do etanol usando óxidos tipo perovskita LaBO3 (B= Mn, Ni, Fe)

Autor: Jair C. C. Freitas, Clara Muniz de Almeida, Paulo Roberto Nagipe da Silva, Ana Brígida Soares
Rok vydání: 2007
Předmět:
Zdroj: Química Nova. 30:1061-1066
ISSN: 0100-4042
DOI: 10.1590/s0100-40422007000500002
Popis: The present work investigated the effect of coprecipitation-oxidant synthesis on the specific surface area of perovskite-type oxides LaBO3 (B= Mn, Ni, Fe) for total oxidation of ethanol. The perovskite-type oxides were characterized by X-ray diffraction, nitrogen adsorption (BET method), thermogravimetric analysis (TGA-DTA), TPR and X-ray photoelectron spectroscopy (XPS). Through method involving the coprecipitation-oxidant was possible to obtain catalysts with different BET specific surface areas, of 33-51 m2/g. The results of the catalytic test confirmed that all oxides investigated in this work have specific catalytic activity for total oxidation of ethanol, though the temperatures for total conversion change for each transition metal.
Databáze: OpenAIRE