Title: Method of making sulfur-resistant composite metal membranes

Abstract

The invention provides thin, hydrogen-permeable, sulfur-resistant membranes formed from palladium or palladium-alloy coatings on porous, ceramic or metal supports. Also disclosed are methods of making these membranes via sequential electroless plating techniques, wherein the method of making the membrane includes decomposing any organic ligands present on the substrate, reducing the palladium crystallites on the substrate to reduced palladium crystallites, depositing a film of palladium metal on the substrate and then depositing a second, gold film on the palladium film. These two metal films are then annealed at a temperature between about 200.degree. C. and about 1200.degree. C. to form a sulfur-resistant, composite PdAu alloy membrane.

Inventors:

Way, J Douglas ^[1]; Lusk, Mark ^[2]; Thoen, Paul ^[3]

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+ Show Inventor Affiliations

1. Boulder, CO
2. Golden, CO
3. Littleton, CO

Issue Date:

2012-01-24

Research Org.:

Colorado School of Mines (Golden, CO)

Sponsoring Org.:

USDOE

OSTI Identifier:

1034638

Patent Number(s):

8101243

Application Number:

11/768,188

Assignee:

Colorado School of Mines (Golden, CO)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B01D2323/14 - Aging features
B01D2325/022 - Asymmetric membranes
B01D53/228 - {characterised by specific membranes}
B01D67/0051 - {by controlled crystallisation, e,.g. hydrothermal growth}
B01D67/0069 - {by deposition from the liquid phase, e.g. electrochemical deposition
B01D67/0083 - {Thermal after-treatment}
B01D69/12 - Composite membranes
B01D71/022 - {Metals}

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS

C01B2203/0405 - Purification by membrane separation
C01B2203/047 - the impurity being carbon monoxide
C01B2203/0475 - the impurity being carbon dioxide
C01B3/505 - {Membranes containing palladium}

C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS

C22C1/00 - Making alloys

C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23C - COATING METALLIC MATERIAL

C23C18/1601 - {Process or apparatus}
C23C18/1639 - {Substrates other than metallic, e.g. inorganic or organic or non-conductive}
C23C18/1644 - {porous substrates}
C23C18/1651 - {Two or more layers only obtained by electroless plating}
C23C18/1658 - {with two steps starting with metal deposition followed by addition of reducing agent}
C23C18/1692 - {Heat-treatment}
C23C18/1879 - {Use of metal, e.g. activation, sensitisation with noble metals}
C23C18/44 - using reducing agents
C23C18/54 - Contact plating, i.e. electroless electrochemical plating

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

H01M4/94 - Non-porous diffusion electrodes, e.g. palladium membranes, ion exchange membranes
H01M8/0668 - Removal of carbon monoxide or carbon dioxide

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

Y02E60/50 - Fuel cells

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

Y02P70/50 - Manufacturing or production processes characterised by the final manufactured product

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

Y10T428/12535 - with additional, spatially distinct nonmetal component
Y10T428/12611 - Oxide-containing component
Y10T428/12778 - Alternative base metals from diverse categories
Y10T428/31678 - Of metal

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DOE Contract Number:  

FG26-03NT41792; FG02-93ER14363

Resource Type:

Patent

Country of Publication:

United States

Language:

English

Subject:

36 MATERIALS SCIENCE