Method for the production of ceramic catalytic membrane reactors by co-extrusion

Abstract

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 eM 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 PS of the support material (S) at a flow velocity along the axis (x) VS and a paste PM of active material (M) with a flow velocity along the axis (x) VM, where VS=VM; 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).

Description

technical field [0001] The present invention relates to the fabrication of catalytic membrane reactors associated with solid-state electrochemical reactions. Background technique [0002] Catalytic membrane reactors (or CMRs) associated with solid-state electrochemical reactions must have the following properties as a whole: [0003] - it must be able to catalyze the chemical reaction it was designed for; [0004] - it must have ionically, electronically or mixed conducting properties to allow the electrochemical conversion required for the reaction in progress to take place; and [0005] - It must be stable under the operating conditions employed. [0006] For catalytic membrane reactors for methane reforming reactions, methane is converted to synthesis gas according to the following chemical reactions: [0007] CH 4 +1 / 2O 2 →2H 2 +CO, [0008] Where water molecules may optionally be interposed, the reaction is carried out at a temperature between 600°C and 1100°C, p...

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Problems solved by technology

[0016] However, since none of the above methods is fully satisfactory for the production of a membrane reactor for the production of synthesis gas, which corresponds to a tubular structure comprising at least one porous material and at least one dense material—above The thickness of the two materials differs by 1 to 2 orders of magnitude, so the inventors tried to develop a method without the above disadvantages

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