US Patent No: 6,280,864
Number of patents in Portfolio can not be more than 2000
Control system for providing hydrogen for use with fuel cells
Stats
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Aug 28, 2001
Issued date -
Jun 18, 1999
filing date -
09/336,084
serial no -
Expired
status
Importance
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Abstract
Hydrogen generation and fuel cell operation are integrated through the use of a low-cost hydrogen generation zone which comprises a pre-reforming zone, a partial oxidation zone, a reforming zone, and a water gas shift zone. Anode waste gas from the fuel cell is burned to provide heat to pre-reform the feed to the hydrogen generation zone while the burner exit temperature and the reforming zone exit temperatures are controlled using a simplified control system to eliminate thermal cycling in the hydrogenation zone. This simplified control of the hot side temperatures in the hydrogen generation zone below about 700.degree. C. combined with use of the pre-reforming zone, surprisingly permits the use of carbon steel and/or stainless steel for construction of the hydrogenation zone while providing an efficient system which does not require external fuel and offers a high degree of feedstock flexibility at low cost.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 4,943,493 Fuel cell power plant | 33 | 1989 | |
| 5,733,347 Compact fuel gas reformer assemblage | 42 | 1995 | |
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| 5,486,428 Solid oxide fuel cell stack | 40 | 1995 | |
| 5,595,833 Solid oxide fuel cell stack | 44 | 1995 | |
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| 4,869,894 Hydrogen generation and recovery | 44 | 1987 | |
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| 4,716,023 Composite partial oxidizer and reformer | 24 | 1986 | |
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| 4,522,894 Fuel cell electric power production | 139 | 1984 | |
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| 4,861,348 Fuel reforming apparatus | 21 | 1987 | |
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| 6,120,923 Steam producing hydrocarbon fueled power plant employing a PEM fuel cell | 61 | 1998 | |
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| 5,609,834 Plate reformer | 36 | 1995 | |
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| 4,863,712 Catalysts for reforming hydrocarbon feedstocks | 37 | 1988 | |
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| 5,648,182 Fuel cell power generation system | 38 | 1995 | |
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| 4,692,306 Catalytic reaction apparatus | 53 | 1986 | |
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| 5,641,585 Miniature ceramic fuel cell | 78 | 1995 | |
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| 4,479,925 Preparation of ammonia synthesis gas | 39 | 1982 | |
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| 5,861,441 Combusting a hydrocarbon gas to produce a reformed gas | 42 | 1997 | |
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| 5,741,474 Process for production of high-purity hydrogen | 84 | 1995 | |
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| 5,651,833 Waste concentration and destruction process | 8 | 1996 | |
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| 5,181,937 Apparatus for production of synthesis gas using convective reforming | 21 | 1991 | |
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| 4,925,456 Process and apparatus for the production of synthesis gas | 18 | 1987 | |
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| 5,226,928 Reforming apparatus for hydrocarbon | 55 | 1990 | |
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| 4,691,071 Dehydrogenation of dehydrogenatable hydrocarbons | 15 | 1986 | |
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| 5,401,589 Application of fuel cells to power generation systems | 197 | 1993 | |
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| 5,143,800 Electrochemical cell apparatus having combusted exhaust gas heat exchange and valving to control the reformable feed fuel composition | 74 | 1990 | |
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| 5,858,314 Thermally enhanced compact reformer | 120 | 1996 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Feb 28, 2013 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |