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US5525322A
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Method for simultaneous recovery of hydrogen from water and from hydrocarbons
Assignee: University of California
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Filing: 1994-10-12
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Granted: 1996-06-11
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Expires: 2014-10-12
Abstract
Abstract Method for simultaneous recovery of hydrogen and hydrogen isotopes from water and from hydrocarbons. A palladium membrane, when utilized in cooperation with a nickel catalyst in a reactor, has been found to drive reactions such as water gas shift, steam reforming and methane cracking to substantial completion by removing the product hydrogen from the reacting mixture. In addition, ultrapure hydrogen is produced, thereby eliminating the need for an additional processing step.
Inventors
- 👤 R. Scott Willms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:14
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/50; C01B3/501; B; B01; B01J; B01J19/00; B01J19/24; B01J19/2475; B01J35/00; B01J35/50; B01J35/58; B01J35/59; B01J4/00; B01J4/04; C01B3/02; C01B3/06; C01B3/12; C01B3/16; C01B3/22; C01B3/24; C01B3/26; C01B3/32; C01B3/34; C01B3/38; C01B2203/00; C01B2203/02; C01B2203/0205; C01B2203/0227; C01B2203/0233; C01B2203/0266; C01B2203/0277; C01B2203/0283; C01B2203/04; C01B2203/0405; C01B2203/041; C01B2203/0465; C01B2203/0475; C01B2203/08; C01B2203/0805; C01B2203/0811; C01B2203/0816; C01B2203/10; C01B2203/1041; C01B2203/1047; C01B2203/1052; C01B2203/12; C01B2203/1205; C01B2203/1211; C01B2203/1235; C01B2203/1241; C01B2203/16; C01B2203/1614; C01B2203/1695; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
93 words
A method for recovering hydrogen isotopes from hydrocarbon and water feed material, which comprises the steps of: a. mixing carbon monoxide and water with the feed material, forming thereby a gas mixture such that the reactions CO+H.sub.2 O CO.sub.2 +H.sub.2, and CH.sub.4 +H.sub.2 O CO+3H.sub.2 can occur; b. flowing the gas mixture over a heated nickel catalyst such that the equilibrium of the reactions permits substantial generation of hydrogen isotopes; c. contacting the resulting gas mixture with a heated palladium membrane; and d. removing the hydrogen isotopes which have permeated the palladium membrane.
Claim 2
Independent Claim
93 words
A method for recovering hydrogen isotopes from hydrocarbon and water feed material, which comprises the steps of: a. mixing carbon monoxide and water with the feed material, forming thereby a gas mixture such that the reactions CO+H.sub.2 O CO.sub.2 +H.sub.2, and CH.sub.4 +H.sub.2 O CO+3H.sub.2 can occur; b. flowing the gas mixture over a heated nickel catalyst such that the equilibrium of the reactions permits substantial generation of hydrogen isotopes; c. contacting the resulting gas mixture with a heated palladium membrane; and d. removing the hydrogen isotopes which have permeated the palladium membrane.
Claim 3
Dependent Claim
22 words
The method as described in claim 1, wherein the nickel catalyst and the palladium membrane are heated to substantially the same temperature.
Claim 4
Dependent Claim
18 words
The method as described in claim 1, wherein the nickel catalyst and the palladium membrane are in contact.
Claim 5
Dependent Claim
21 words
The method as described in claim 2, wherein the nickel catalyst and the palladium membrane are heated to above 400° C.
Claim 6
Dependent Claim
32 words
The method as described in claim 1, wherein the amounts of carbon monoxide and water are chosen such that the hydrogen-bearing compounds in the feed material are substantially consumed in the reactions.
References Cited (Backward Citations)
US5229102A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-06-11 | 1999-12-11 | 2000-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-06-11 | 2003-12-11 | 2004-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-06-11 | 2007-12-11 | 2008-06-11 | $7700.00 | Window Closed / Lapsed |