PROCEDE D'ELABORATION DE REACTEURS MEMBRANAIRES CATALYTIQUES CERAMIQUES PAR CO-EXTRUSION

摘要

Preparation of a supported tubular ceramic membrane composed of two coaxial layers along a axis (x), a first layer with a non-zero thickness es of a support material (S) and a second layer with a non-zero thickness e_M of an active material (M), characterised in that it comprises the following steps in sequence: a step (a) to shape said supported membrane by simultaneous coaxial co-extrusion of a paste P_S of the support material (S) at a flow velocity along the axis (x) V_S and a paste P_M of active material (M) with a flow velocity along the axis (x) V_M, where V_S=V_M; a step (b) to dry the co-extrudate formed in step (a); a step (c) to debind the co-extrudate dried in step (b), and a step (d) to apply a heat treatment to co-sinter the two coaxial layers of the product obtained in step (c); Device for implementation of step (a).