Hydrogen transport membrane fabrication method

B - Operations – Transporting – 01 – D

Patent

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Details

B01D 71/02 (2006.01) B01D 67/00 (2006.01) B01D 69/10 (2006.01) C01B 3/50 (2006.01) C23C 18/42 (2006.01)

Patent

CA 2629442

A method of forming a hydrogen transport membrane in which isolated deposits of palladium, a palladium alloy or a component of such alloy are produced on a surface of the porous ceramic support that bridge pores within the porous ceramic support without penetrating the pores and without bridging regions of the surface defined between the pores. The isolated deposits of the metal are produced by an electroless plating process that involves contacting the porous ceramic support with a precipitating agent so that the precipitating agent fills the pores but does not seep out of the pores onto the regions of the surfaces defined between the pores. The surface is then contacted with a salt solution containing a salt of the metal so that said metal precipitates and produces the isolated deposits. Thereafter, a dense layer of palladium, palladium alloy ,is formed on the surface having the isolated deposits.

L~invention concerne un procédé de formation d~une membrane de transport de l~hydrogène selon lequel des dépôts isolés de palladium, d~un alliage de palladium ou d~un composant constitué d~un tel alliage sont formés sur une surface d~un support céramique poreux, ladite surface reliant les pores et lesdits dépôts étant formés à l~intérieur dudit support sans pénétrer dans les pores ni relier des régions de la surface définies entre les pores. Lesdits dépôts métalliques isolés sont formés par un procédé de placage sans électrodes impliquant de mettre le support céramique poreux en contact avec un agent précipitant de manière à ce que ledit agent remplisse les pores sans sortir de ces pores ni s~étaler sur les régions des surfaces définies entre les pores. La surface est ensuite mise en contact avec une solution saline contenant un sel du métal de sorte que ledit métal précipite et forme les dépôts isolés. Puis, une couche dense de palladium ou d~alliage de palladium est formée sur la surface portant les dépôts isolés.

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