Chemical modification of the surface of alumina with alkaline earth metal oxides using the polymeric precursor method for catalysis application

Abstract

In this study, modifications of alumina surface with of alkaline earth metal oxides were studied, using the polymeric precursor method. The modified compounds were characterized by X-ray diffraction, nitrogen adsorption-desorption and scanning electron microscopy. The catalytical properties of these new catalysts were evaluated for the transesterification reaction of babassu oil. It is observed that the transesterification reaction of babassu oil with methanol was successfully carried out using the modified alumina samples. Keywords: surface modification, alumina, alkaline earth metal oxides. Resumo Neste trabalho foram estudadas modificações da superfície de alumina com óxidos de metais alcalino-terrosos, usando o método dos precursores poliméricos. Os compostos modificados foram caracterizados por difração de raios X, adsorção-dessorção de nitrogênio e microscopia eletrônica de varredura. As propriedades catalíticas desses novos catalisadores foram avaliadas para

Surface Functionalization and Electrical Discharge Sensitivity of Passivated Al Nanoparticles

“…Kaplowitz et al report an inorganic coating of pure aluminum nanoparticles with iron oxide for nanoenergetic fomulations . Other inorganic coatings of passivated aluminum or pure alumina nanoparticles were successfully prepared out of alkaline earth metal oxides or silanes. , In contrast to alumina-coated Al nanoparticles, pristine alumina nanoparticles cannot operate as fuel particles because they are already oxidized. Nevertheless, chemical modification procedures of alumina nanoparticle surfaces can be applied for Al/Al 2 O 3 core/shell nanoparticles because the organic compounds only chemically interact with the Al 2 O 3 surface, and physicochemical properties of those particular surfaces should be the same.…”