Síntese e caracterização de membrana zeolítica (NaZSM-5/Alumina).

Abstract

In this work were obtained solid materials such as: Na-ZSM-5 zeolite, ceramic membranes (based on alumina) and zeolite membranes (Na-ZSM-5/ ceramic membrane). The synthesis of zeolite Na-ZSM-5 have been used two techniques: the hydrothermal synthesis in the presence of organic template, based on patents registered by MOBIL and synthesis in the absence of organic template, based on the patent (no 8506248) registered by PETROBRAS. The ceramic supports were obtained by milling, where the liquid mixture with water and additives and was subjected to homogeneous process of shaping (pressing) and then the solids were subjected to temperature of 1500°C/1h. For the preparation of zeolite membrane was used the technique of direct crystallization (hydrothermal synthesis) on the surface of the medium, called synthesis "in situ". The materials were characterized by XRD,XED and mercury porosimeter. The method of in situ hydrothermal synthesis was efficient, however, it is necessary that the conditions are optimized for synthesis and successive syntheses are performed for a zeolite thicker film is formed on the ceramic support.