Composite structures of membranes that are selectively...

Gas separation: apparatus – Apparatus for selective diffusion of gases – Plural layers

Reexamination Certificate

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C096S007000, C096S008000, C096S010000, C095S055000, C095S056000, C048S127900

Reexamination Certificate

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07449052

ABSTRACT:
The invention relates to a composite structure consisting of a relatively long filtration bar comprising, from the outside, an ultra-thin layer (26) that is selectively permeable to hydrogen and made from palladium or silver alloy. Said layer is disposed on a permeable, rigid, refractory substrate consisting of a more or less solid body (30) that is covered with an intermediary thin layer (28) having a relatively smooth surface. The body (30) and the intermediary layer (28) are made respectively by sintering with fine and ultra-fine Inconel grains. A rigid metallic axial structure (32) is embedded in the body (30). Veinlets (31), which are made in the body (30) through the destruction of thermo-destructible wires during sintering, increase the permeability of the substrate. The invention is particularly applicable to hydrogen-producing combustible gas processors.

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patent: 6653005 (2003-11-01), Muradov
patent: 6923944 (2005-08-01), Buxbaum

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