Composite gas separation modules having high Tamman temperature intermediate layers
AssigneeWorcester Polytechnic Institute
InventorsYi Hua Ma, Ivan P. Mardilovich, Erik E. Engwall
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Abstract
A composite gas separation module includes a porous metal substrate; an intermediate layer that includes a powder having a Tamman temperature higher than the Tamman temperature of the porous metal substrate and wherein the intermediate layer overlies the porous metal substrate; and a dense hydrogen-selective membrane, wherein the dense hydrogen-selective membrane overlies the intermediate layer. In another embodiment, a composite gas separation module includes a porous metal substrate; an intermediate powder layer; and a dense gas-selective membrane, wherein the dense gas-selective membrane overlies the intermediate powder layer.
Claims43
A composite gas separation module, comprising:
- a) a porous metal substrate;
- b) an intermediate layer that includes a metal powder having a Tamman temperature higher than the Tamman temperature of the porous metal substrate and wherein the intermediate layer overlies the porous metal substrate;
- and
- c) a dense hydrogen-selective membrane, wherein the dense hydrogen-selective membrane overlies the intermediate layer.
A method for fabricating a composite gas separation module, comprising the steps of:
- a) applying an intermediate layer over a porous metal substrate, the intermediate layer including a metal powder having a Tamman temperature higher than the Tamman temperature of the porous metal substrate;
- and
- b) applying a dense hydrogen-selective membrane over the intermediate layer, the intermediate layer including the metal powder, thereby forming the composite gas separation module.
A method for selectively separating hydrogen gas from a hydrogen gas-containing gaseous stream, comprising the step of:
- directing the hydrogen gas-containing gaseous stream to a composite gas separation module, wherein the composite gas separation module includes:
- a) a porous metal substrate;
- b) an intermediate layer that includes a metal powder having a Tamman temperature higher than the Tamman temperature of the porous metal substrate and wherein the intermediate layer overlies the porous metal substrate;
- and
- c) a dense hydrogen-selective membrane, wherein the dense hydrogen-selective membrane overlies the intermediate layer;
- whereby hydrogen gas is at least partially partitioned from the gaseous stream by passing through the dense hydrogen-selective membrane.
A composite gas separation module, comprising:
- a) a porous metal substrate;
- b) an intermediate unsintered metal powder layer;
- and
- c) a dense gas-selective membrane, wherein the dense gas-selective membrane overlies the intermediate unsintered metal powder layer.
A composite gas separation module, comprising:
- a) a porous metal substrate;
- b) an intermediate layer that includes:
- (1) a powder having a Tamman temperature higher than the Tamman temperature of the porous metal substrate and wherein the intermediate layer overlies the porous metal substrate, and (2) at least one material having a Tamman temperature less than or about equal to the Tamman temperature of a dense hydrogen-selective membrane selected from the group consisting of silver, gold, copper, cerium and yttrium;
- and
- c) the dense hydrogen-selective membrane, wherein the dense hydrogen-selective membrane overlies the intermediate layer.
Dependencies are inferred from the claim text.