SCHEIBLER, J. R.; http://lattes.cnpq.br/5415281907088275; SCHEIBLER, Janaina Rafaella.
Résumé:
Among the microporous inorganic membranes, zeolite membranes are a promising
technology due to their potential applications normally in alcohol dehydration,
separation of gas molecules, separation of isomers or chemical processes, including
esterification reactions. In this regard, it is essential to study the preparation of these
materials routes in order to develop products with quality and low cost. Therefore,
innovation of this study gives the synthesis of zeolite membranes via pore-plugging
synthesis method aimed at the use of inorganic membranes for gas permeation N2.
In this work the following materials were developed: ZSM-5 zeolite, ceramic
membranes (γ-alumina and α-alumina) and zeolitic membranes (ZSM-5/γ-alumina
and ZSM-5/α-alumina). Zeolite ZSM-5 was synthesized by the hydrothermal method.
Ceramic membranes (γ-alumina and α-alumina) were prepared from the ceramic
powder forming technique, and subsequently subjected to a sintering temperature of
1000 °C/1h and 1200 °C/1h respectively. The preparation of zeolite membranes
(ZSM-5/γ-alumina and ZSM-5/α-alumina) was carried out based on the method in
pore plugging. The samples were characterized from the techniques of X diffraction
and scanning electron microscopy rays. The experimental results allow several
conclusions about the development of materials: zeolite ZSM-5, ceramic membranes
(γ-alumina and α-alumina) and zeolite membranes (ZSM-5/γ-alumina and ZSM-5/αalumina).
From the X-ray diffraction, it found that the method of synthesis used was
effective in obtaining the zeolite ZSM-5. The XRD pattern showed peaks
characteristic of ZSM-5 compared to the standard. The results obtained by XRD
ceramic membranes (γ-alumina and α-alumina) showed the formation of peaks
characteristic of aluminum oxide, the materials are crystalline and pure. For the poreplugging
method can be said to be a promising method because it showed a
satisfactory formation of the zeolite layer on the result of XRD both zeolite
membranes (ZSM-5/γ-alumina and ZSM-5/α-alumina).