US5612012A
Expired / Lapsed
US
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Method for removing carbon monoxide from reformed gas
Assignee: NGK Insulators Ltd
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Filing: 1995-05-26
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Granted: 1997-03-18
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Expires: 2015-05-26
Abstract
Abstract A method for removing CO from a reformed gas includes the steps of treating the reformed gas by a hydrogen purifier to decrease a ratio of the concentration of components other than hydrogen to the concentration of hydrogen so that the ratio may be lower than in the reformed gas, and then converting CO contained in the gas treated by the hydrogen purifier into a gas other than CO. CO can be removed from the reformed gas, and simultaneously high-purity hydrogen can also be obtained, which leads to the increase of a fuel efficiency and the inhibition effect of performance deterioration.
Inventors
- 👤 Takao Soma
- 👤 Tomonori Takahashi
- 👤 Manabu Isomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:21
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/06; H01M8/0662; C; C01; C01B; C01B3/00; C01B3/50; C01B3/501; C01B3/503; C01B3/505; C01B3/56; C01B3/58; C01B3/586; C01B2203/00; C01B2203/04; C01B2203/0405; C01B2203/041; C01B2203/0435; C01B2203/0445; C01B2203/0465; C01B2203/047; C01B2203/0475; C01B2203/0495; H01M2300/00; H01M2300/0017; H01M2300/0065; H01M2300/0082; H01M8/0606; H01M8/0612; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
86 words
A method for removing carbon monoxide from a reformed gas said method comprising the steps of providing a reformed gas containing hydrogen, carbon dioxide, carbon monoxide and water, treating the reformed gas by subjecting said gas to a hydrogen purifier to reduce the concentration of carbon dioxide, carbon monoxide and water thereby decreasing the ratio of the concentration of components other than hydrogen to the concentration of hydrogen and then converting the carbon monoxide contained in the treated gas into a gas other than carbon monoxide.
Claim 2
Independent Claim
86 words
A method for removing carbon monoxide from a reformed gas said method comprising the steps of providing a reformed gas containing hydrogen, carbon dioxide, carbon monoxide and water, treating the reformed gas by subjecting said gas to a hydrogen purifier to reduce the concentration of carbon dioxide, carbon monoxide and water thereby decreasing the ratio of the concentration of components other than hydrogen to the concentration of hydrogen and then converting the carbon monoxide contained in the treated gas into a gas other than carbon monoxide.
Claim 3
Dependent Claim
28 words
A method for removing carbon monoxide from a reformed gas according to claim 1, wherein the hydrogen purifier is a hydrogen separating apparatus comprising an alloy containing Pd.
Claim 4
Dependent Claim
33 words
A method for removing carbon monoxide from a reformed gas according to claim 2, wherein the hydrogen separating apparatus comprises a porous substrate and a Pd alloy film formed on the porous substrate.
Claim 5
Dependent Claim
26 words
A method for removing carbon monoxide from a reformed gas according to claim 2, wherein the hydrogen separating apparatus further comprises a carbon monoxide converting catalyst.
Claim 6
Dependent Claim
28 words
A method for removing carbon monoxide from a reformed gas according to claim 2, wherein the hydrogen separating apparatus has an operation temperature of 200° C. or more.
Claim 7
Dependent Claim
30 words
A method for removing carbon monoxide from a reformed gas according to claim 2, wherein the carbon monoxide is converted into a gas other than carbon monoxide using a catalyst.
Claim 8
Dependent Claim
25 words
A method for removing carbon monoxide from a reformed gas according to claim 6, wherein the catalyst is integrally combined with the hydrogen separating apparatus.
Claim 9
Dependent Claim
31 words
A method for removing carbon monoxide from a reformed gas according to claim 1, wherein the hydrogen purifier regulates the volume ratio of hydrogen to carbon monoxide to 200 or more.
Claim 10
Dependent Claim
32 words
A method for removing carbon monoxide from a reformed gas according to claim 1, wherein a carbon monoxide converter is used to convert carbon monoxide into a gas other than carbon monoxide.
Claim 11
Dependent Claim
32 words
A method for removing carbon monoxide from a reformed gas according to claim 9, wherein an operation temperature of the carbon monoxide converter is in the range of 100° to 500° C.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-03-17 | 2000-09-16 | 2001-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-17 | 2004-09-16 | 2005-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-17 | 2008-09-16 | 2009-03-18 | $7700.00 | Window Closed / Lapsed |