Síntese de membrana zeolítica (filme zeolítico Y/α-alumina) visando sua aplicação na catálise.

Abstract

Among microporous inorganic membranes, zeolite membranes are a promising technology because of their potential applications as catalytic membrane reactor, chemical sensor, electrodes, optical-electronic devices, and electrical insulation, to name a few. Therefore, it is important to study the way they can be produced in order to develop high quality products at a low cost. In this work, zeolite membranes (Film zeolite Y / -alumina) were prepared using the method of seeded secondary growth. The zeolite Y was synthesized via a hydrothermal method and characterized by fluorescence spectroscopy X-ray energy dispersive (EDX), X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The ceramic support ( - alumina) was obtained using the technique of powder conformation and afterward subjected to sintering at 1200°C/1h and characterized by mercury porosimetry, XRD, and SEM. The preparation of the zeolite Y membrane was done using the method of hydrothermal synthesis with seed (method of secondary growth), and characterized by XRD and SEM. The diffraction of X-rays indicated that the processes of hydrothermal synthesis and conformation led to the formation of zeolite Y and ceramic support ( -alumina), respectively. Furthermore, the presence of zeolite membrane could also be confirmed by X-ray diffraction. From the images obtained by SEM was possible to observe the formation of a homogeneous zeolite film on the surface of the ceramic support ( -alumina).