Ceramic Membranes Applied in Separation Processes by Dionisio da Silva Biron Venina dos Santos & Mara Zeni

Author:Dionisio da Silva Biron, Venina dos Santos & Mara Zeni
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

Membranes obtained by sol–gel method have demonstrated unique properties. The most important feature of this method is the high porosity (30–70%) that the membranes obtained by this method are presented. Over the years, the method has made possible the development of membranes with pore geometry and controlled on the nanoscale. In addition, stood out by providing a good dimensional pore structure, high chemical resistance, and mechanical stability (Burggraaf and Cot 1996).

Gas separation based on molecular sieving purposes, must used ceramic membranes with pore sizes less than 1 nm. In this case, the membrane can be prepared by the route of the sol using polymeric membrane of γ-alumina prepared from colloidal sol support. It should be noted that in the course of the sol, the polymeric membrane prepared pore size is determined by the degree of branching of the polymer. A low degree of branching would result in a narrower pore system (Li 2007).

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