Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – With means applying electromagnetic wave energy or...
Reexamination Certificate
2000-08-10
2002-04-23
Johnson, Jerry D. (Department: 1764)
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
With means applying electromagnetic wave energy or...
C422S105000, C422S198000, C422S200000, C422S202000, C422S208000, C048S127900, C429S006000, C429S006000, C429S006000
Reexamination Certificate
active
06375906
ABSTRACT:
FIELD OF THE INVENTION
The invention relates generally to fuel processing systems, and more specifically to fuel processing systems that utilize a hydrocarbon feedstock.
BACKGROUND AND SUMMARY OF THE INVENTION
Purified hydrogen is used in the manufacture of many products including metals, edible fats and oils, and semiconductors and microelectronics. Purified hydrogen is also an important fuel source for many energy conversion devices. For example, fuel cells use purified hydrogen and an oxidant to produce an electrical potential. A process known as steam reforming produces by chemical reaction hydrogen and certain byproducts or impurities. A subsequent purification process removes the undesirable impurities to provide hydrogen sufficiently purified for application to a fuel cell.
In a steam reforming process, one reacts steam and a carbon-containing compound in the presence of a catalyst. Examples of suitable carbon-containing compounds include, but are not limited to, alcohols (such as methanol or ethanol) and hydrocarbons (such as methane, propane, gasoline or kerosene). Steam reforming requires an elevated operating temperature, e.g., between 250 degrees centigrade and 900 degrees centigrade, and produces primarily hydrogen and carbon dioxide, with lesser quantities of carbon monoxide also being formed. Trace quantities of unreacted reactants and trace quantities of byproducts also can result from steam reforming. Efficient operation of the fuel processor requires careful indexing and control of the ratio of water (steam) to carbon-containing feedstock.
The invented system includes a fuel processor that produces hydrogen from a variety of feedstocks. One such fuel processor is a steam reformer, which produces purified hydrogen from a carbon-containing feedstock and water. In the invented system, various mechanisms for controlling the ratio of steam to carbon-containing feedstock are disclosed. In some embodiments, the fuel processing system includes a fuel cell stack that includes at least one fuel cell adapted to produce electrical power from air (oxygen) and hydrogen gas produced by the fuel processor.
Many other features of the present invention will become manifest to those versed in the art upon making reference to the detailed description which follows and the accompanying sheets of drawings in which preferred embodiments incorporating the principles of this invention are disclosed as illustrative examples only.
REFERENCES:
patent: 3094391 (1963-06-01), Mader
patent: 3144312 (1964-08-01), Mertens
patent: 3338681 (1967-08-01), Kordesch
patent: 3350176 (1967-10-01), Green et al.
patent: 3450500 (1969-06-01), Setzer et al.
patent: 3469944 (1969-09-01), Bocard et al.
patent: 3524819 (1970-08-01), Guerrieri
patent: 3782904 (1974-01-01), Fletcher
patent: 3787038 (1974-01-01), Tesner et al.
patent: 3920416 (1975-11-01), Houseman
patent: 3955941 (1976-05-01), Houseman et al.
patent: 3982910 (1976-09-01), Houseman et al.
patent: 4003343 (1977-01-01), Lee
patent: 4098959 (1978-07-01), Fanciullo
patent: 4098960 (1978-07-01), Gagnon
patent: 4127393 (1978-11-01), Timmins et al.
patent: 4238403 (1980-12-01), Pinto
patent: 4302177 (1981-11-01), Fankhanel et al.
patent: 4315893 (1982-02-01), McCallister
patent: 4387434 (1983-06-01), Moncrief, Jr. et al.
patent: 4400182 (1983-08-01), Davies et al.
patent: 4430304 (1984-02-01), Spurrier et al.
patent: 4466253 (1984-08-01), Jaster
patent: 4472176 (1984-09-01), Rubin
patent: 4504447 (1985-03-01), Spurrier et al.
patent: 4533607 (1985-08-01), Serderquist
patent: 4567857 (1986-02-01), Houseman et al.
patent: 4657828 (1987-04-01), Tajima
patent: 4684581 (1987-08-01), Struthers
patent: 4713234 (1987-12-01), Weirich et al.
patent: 4788004 (1988-11-01), Pinto et al.
patent: 4838897 (1989-06-01), Amano et al.
patent: 4849187 (1989-07-01), Uozu et al.
patent: 4880040 (1989-11-01), Pierson et al.
patent: 4981676 (1991-01-01), Minet et al.
patent: 5030661 (1991-07-01), Lywood
patent: 5229102 (1993-07-01), Minet et al.
patent: 5326550 (1994-07-01), Adris et al.
patent: 5354547 (1994-10-01), Rao et al.
patent: 5382271 (1995-01-01), Ng et al.
patent: 5399323 (1995-03-01), Paisley et al.
patent: 5401589 (1995-03-01), Palmer et al.
patent: 5417051 (1995-05-01), Ankersmit et al.
patent: RE35002 (1995-07-01), Matsubara et al.
patent: 5458857 (1995-10-01), Collins et al.
patent: 5527632 (1996-06-01), Gardner
patent: 5616430 (1997-04-01), Aoyama
patent: 5637259 (1997-06-01), Galuszka et al.
patent: 5639431 (1997-06-01), Shirasaki et al.
patent: 5658681 (1997-08-01), Sato et al.
patent: 5677073 (1997-10-01), Kawatsu
patent: 5741474 (1998-04-01), Isomura et al.
patent: 5741605 (1998-04-01), Gillett et al.
patent: 5858314 (1999-01-01), Hsu et al.
patent: 5861137 (1999-01-01), Edlund
patent: 5888273 (1999-03-01), Buxbaum
patent: 5897766 (1999-04-01), Kawatsu
patent: 5897970 (1999-04-01), Isomura et al.
patent: 5932181 (1999-08-01), Kim et al.
patent: 5985474 (1999-11-01), Chen et al.
patent: 5997594 (1999-12-01), Edlund et al.
patent: 6007931 (1999-12-01), Fuller et al.
patent: 6042956 (2000-03-01), Lenel
patent: 6045772 (2000-04-01), Szydlowski et al.
patent: 6045933 (2000-04-01), Okamoto
patent: 6077620 (2000-06-01), Pettit
patent: 6083637 (2000-07-01), Walz et al.
patent: 6103411 (2000-08-01), Matsubayashi et al.
patent: 6190623 (2001-02-01), Sanger et al.
patent: 6221117 (2001-04-01), Edlund et al.
patent: 6242120 (2001-06-01), Herron
patent: 1065741 (2001-01-01), None
patent: WO 97/25649 (1997-07-01), None
patent: WO 99/65097 (1999-12-01), None
English abstract of Japanese Patent No. 432150, 1992.
English abstract of Japanese Patent No. 513230, 1993.
English abstract of Japanese Patent No. 514790, 1993.
English abstract of Japanese Patent No. 604070, 1994.
English abstract of Japanese Patent No. 634540. Date Unknown.
English abstract of Japanese Patent No. 710910, 1995.
English abstract of Japanese Patent No. 828793, 1996.
English abstract of Japanese Patent No. 6176779, 1994.
English abstract of Great Britain Patent No. 2,305,186. Date unknown.
Adris, A. M., et al., “A Fluidized Bed Membrane Reactor for the Steam Reforming of Methane,” The Canadian Journal of Chemical Engineering, vol. 69, pp. 1061-1070 (Oct. 1991).
Chai, M., et al., “Promotion of Methane Steam Reforming Using Ruthenium-Dispersed Microporous Alumina Membrane Reactor,” Chemistry Letters, The Chemical Society of Japan, pp. 41-44 (1993).
Edlund, Dr. David and William Pledger, “Development of a Compact and Economical Steam Reformer for Fuel-Cell Systems,” Fifth Grove Fuel Cell Symposium, Commonwealth Institute, London, U.K., p. 6 (Sep. 22-23, 1997).
Ledjeff-Hey, K., et al., “Compact Hydrogen Production Systems for Solid Polymer Fuel Cells,” Fifth Grove Fuel Cell Symposium, Commonwealth Institute, London, U.K., p. 17 (Sep. 22-25, 1997).
Menzer, R., et al., “Fuel Processing in Fuel Cell Systems for Mobile Applications—Gasoline as Energy Carrier On-Bord,” Fifth Grove Fuel Cell Symposium, Commonwealth Institute, London, U.K., (no page No.), (Sep. 22-25, 1997).
Minet, R. G., et al., “Experimental Studies of A Ceramic Membrane Reactor for the Steam/Methane Reaction at Moderate Temperatures (400-700°C.),” Symposium on Natural Gas Upgrading II Presented before The Division of Petroleum Chemistry, Inc., Meeting of American Chemical Society, San Francisco, California, U.S.A., pp. 245-248 (Apr., 1992).
Teagan, W. P., et al., “Cost Reduction of Fuel Cells for Transportation Applications—Fuel Processing Options,” Fifth Grove Fuel Cell Symposium, Commonwealth Institute, London, U.K. (Sep. 22-25, 1997).
Amphlett, J. C., et al., “On Board Hydrogen Purification for Steam Reformer/PEM Fuel Cell Vehicle Power Plants,” Energy Progress X, Proceedings of the 10thWorld Hydrogen Energy Conference, Cocoa Beach, Florida, U.S.A., vol. 3, pp. 1681-1690 (Jun., 1994).
Edlund, David J. and William A. Pledger, “The Practical Use of Metal-Membrane Reactors for Industrial Applications,” The 1995 Membrane Technology Reviews, pp. 89-97 (Nov., 1994).
Oertel, Michael, et al., “Steam Reforming of Natural Gas with Integrated H
Edlund David J.
Herron Thomas G.
IdaTech LLC
Johnson Jerry D.
Kolisch Hartwell Dickinson McCormack & Heuser, PC
Varcoe Frederick
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