Influence of calcination temperature on the development of ceramic membranes for gas separation

Reference	Presenter	Authors (Institution)	Abstract
17-051	Renata de Carvalho Teles Bertotto	Bertotto, R.d.(Universidade Federal do Rio Grande do Sul); Virginie, M.(Université de Lille 1); Khodakov, A.(Université de Lille 1); Ambrosi, A.(Universidade Federal do Rio Grande do Sul); Pollo, L.D.(Universidade Federal do Rio Grande do Sul); Marcilio, N.R.(Universidade Federal do Rio Grande do Sul); Tessaro, I.C.(Federal University of Rio Grande do Sul);	Gas separation processes are very important in several industrial applications. For this reason, many studies of new technologies and techniques for separation of gases are in constant development, including membrane separation processes. In these processes, the membranes may be manufactured from different materials and configurations such as metallic, polymeric or inorganic, and flat sheet, hollow fiber or tubular. The use of inorganic membranes presents some advantages due to their greater chemical, thermal and mechanical stabilities. Aluminum oxide or alumina (Al2O3) is one of the most used oxides for the production of membranes, due to its properties and high availability. Among the techniques of preparation of ceramic membranes are the extrusion, one of the most widespread and studied by several research groups (ACHIOU et al., 2017; GARMSIRI et al., 2017; OUN et al., 2017; VINOTH KUMAR; KUMAR GHOSHAL; PUGAZHENTHI, 2015), and the centrifugal casting, a method that allows a more homogeneous and packed spread of the alumina particles. In the centrifugal casting technique a cylindrical mold is rotated around its own central axis, forming a ceramic tube that is released and properly treated to result in a compact and homogeneous tubular structure (NIJMEIJER et al., 1998). Thus, the present study aimed to prepare tubular ceramic gas separation membranes based on alumina (CT3000SG, Almatis, BR) using the centrifugal casting technique, and to evaluate the effects of the different calcination temperatures on the tubes’ properties. The tubes were characterized according to the morphology, the porosity and the permeation to gases. The preliminary results indicate that the calcination temperature of the ceramic tubes is an important parameter to produce membranes with good selectivity to gas separation.
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