Patent US4774152A successfully refreshed from Google Patents.
US4774152A
Expired / Lapsed
US
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Reforming catalyst for fuel cells
Assignee: New Energy and Industrial Technology Development Organization
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Filing: 1987-04-06
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Granted: 1988-09-27
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Expires: 2007-04-06
Abstract
Abstract A reforming catalyst adapted for use with fuel cells is disclosed which is free from degradation in catalytic activity even if subjected to a fuel gas containing an electrolyte or substances resulting therefrom, and which has stable and high catalytic activity for an extended period of time. The reforming catalyst includes a catalytically active substance adapted to reform a fuel gas containing hydrocarbons or alcohols into a fuel gas containing hydrogen and carbon monoxide, and an electrolyte-removing substance adapted to remove an electrolyte and/or substances resulting therefrom in the fuel cell. The electrolyte-removing substance has a porous structure and comprises a compound containing at least one of silicon, aluminum and chromium which chemically reacts with the electrolyte and/or the substances resulting therefrom for removal thereof.
Inventors
- 👤 Mitsuie Matsumura
- 👤 Tatsunori Okada
- 👤 Yoshihide Gonjo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:14
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/06; H01M8/0606; H01M8/0612; H01M8/0625; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
47 words
A fuel cell employing an electrolyte comprising a catalytically active substance adapted to reform a fuel gas containing hydrocarbons or alcohols into a fuel gas containing hydrogen and carbon monoxide, and an electrolyte-removing substance adapted to remove said electrolyte and/or substances resulting thereform in said fuel cell.
Claim 2
Dependent Claim
47 words
A fuel cell employing an electrolyte comprising a catalytically active substance adapted to reform a fuel gas containing hydrocarbons or alcohols into a fuel gas containing hydrogen and carbon monoxide, and an electrolyte-removing substance adapted to remove said electrolyte and/or substances resulting thereform in said fuel cell.
Claim 3
Dependent Claim
16 words
A fuel cell as set forth in claim 1 wherein said electrolyte-removing substance has porous structure.
Claim 4
Dependent Claim
23 words
A fuel cell as set forth in claim 1 wherein said electrolyte-removing substance is provided on the surface of said catalytically active substance.
Claim 5
Dependent Claim
23 words
A fuel cell as set forth in claim 2 wherein said electrolyte-removing substance is provided on the surface of said catalytically active substance.
Claim 6
Dependent Claim
26 words
A fuel cell as set forth in claim 1 wherein said electrolyte-removing substance chemically reacts with said electrolyte and/or said substances resulting therefrom for removal thereof.
Claim 7
Dependent Claim
26 words
A fuel cell as set forth in claim 2 wherein said electrolyte-removing substance chemically reacts with said electrolyte and/or said substances resulting therefrom for removal thereof.
Claim 8
Dependent Claim
26 words
A fuel cell as set forth in claim 3 wherein said electrolyte-removing substance chemically reacts with said electrolyte and/or said substances resulting therefrom for removal thereof.
Claim 9
Dependent Claim
26 words
A fuel cell as set forth in claim 4 wherein said electrolyte-removing substance chemically reacts with said electrolyte and/or said substances resulting therefrom for removal thereof.
Claim 10
Dependent Claim
25 words
A fuel cell as set forth in claim 5 wherein said electrolyte-removing substance comprises a compound containing at least one of silicon, aluminum and chromium.
Claim 11
Dependent Claim
25 words
A fuel cell as set forth in claim 6 wherein said electrolyte-removing substance comprises a compound containing at least one of silicon, aluminum and chromium.
Claim 12
Dependent Claim
25 words
A fuel cell as set forth in claim 7 wherein said electrolyte-removing substance comprises a compound containing at least one of silicon, aluminum and chromium.
Claim 13
Dependent Claim
25 words
A fuel cell as set forth in claim 8 wherein said electrolyte-removing substance comprises a compound containing at least one of silicon, aluminum and chromium.
Claim 14
Dependent Claim
20 words
A fuel cell as set forth in claim 1 wherein said catalytically active substance is carried by said electrolyte-removing substance.
Claim 15
Dependent Claim
20 words
A fuel cell as set forth in claim 13 wherein said electrolyte-removing substance is dispersed in said catalytically active substance.
Claim 16
Dependent Claim
24 words
A fuel cell as set forth in claim 14 wherein said catalytically active substance and said electrolyte-removing substance are moulded in a mixed state.
Claim 17
Dependent Claim
16 words
A fuel cell as set forth in claim 1 wherein said catalyst activity substance is nickel.
Claim 18
Dependent Claim
22 words
A fuel cell as set forth in claim 1 further comprising a catalyst carrier by which said catalytically active substance is carried.
Claim 19
Dependent Claim
18 words
A fuel cell as set forth in claim 17 wherein said catalyst carrier comprises a porous inorganic substance.
Claim 20
Dependent Claim
27 words
A fuel cell as set forth in claim 18 wherein the porosity of said electrolyte-removing substance is equal to or greater than that of said catalyst carrier.
Claim 21
Dependent Claim
19 words
A fuel cell as set forth in claim 18 wherein said porous inorganic substance is LiAlO2, CeO2 or MgO.
Claim 22
Dependent Claim
27 words
A fuel cell as set forth in claim 17 wherein said catalytically active substance is also carried by said electrolyte-removing substance in addition to said catalyst carrier.
Claim 23
Dependent Claim
23 words
A fuel cell as set forth in claim 21 wherein said electrolyte-removing substance is provided on the surface of said catalytically active substance.
Claim 24
Dependent Claim
20 words
A fuel cell as set forth in claim 21 wherein said electrolyte-removing substance is dispersed in said catalytically active substance.
Claim 25
Dependent Claim
24 words
A fuel cell as set forth in claim 23 wherein said catalytically active substance and said electrolyte-removing substance is moulded in a mixed state.
Claim 26
Dependent Claim
23 words
A fuel cell as set forth in claim 17 wherein said electrolyte-removing substance is provided on the surface of said catalytically active surface
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-27 | 1992-03-28 | 1992-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-27 | 1996-03-28 | 1996-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-27 | 2000-03-28 | 2000-09-27 | $7700.00 | Window Closed / Lapsed |