US4885078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Devices capable of removing silicon and aluminum from gaseous atmospheres
Assignee: Siemens Energy Inc
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Filing: 1988-12-07
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Granted: 1989-12-05
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Expires: 2008-12-07
Abstract
Abstract An electrochemical device is made of a containment vessel (30) optional ceramic material within the containment vessel and including one or more electrochemical cells (10), the cells containing a porous exposed electrode (11) in contact with a solid electrolyte, where at least one of the exposed electrode, the containment vessel, and the optional ceramic material contains a deposit selected from metal oxide and metal salt capable of forming a metal oxide upon heating, where the metal is selected from the group consisting of Ce, Sm, Mg, Be, Ca, Sr, Ti, Zr, Hf, Y, La, Pr, Nb, Pm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Th, U, and their mixtures.
Inventors
- 👤 Charles J. Spengler
- 👤 Prabhakar Singh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:37
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/96; G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; G01N27/4075; H01M8/00; H01M8/02; H01M8/10; H01M8/12; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
113 words
An electrochemical device, comprising a containment vessel and optional ceramic material within the containment vessel and including at least one electrochemical cell, the cell comprising a porous, exposed electrode in contact with a solid electrolyte, the improvement characterized in that at least one of the exposed electrode, the containment vessel, and the optional material within the containment vessel, contains a deposit selected from metal oxide and metal salt capable of forming metal oxide upon heating, where the metal is selected from the group consisting of Ce, Sm, Mg, Be, Ca, Sr, Ti, Zr, Hf, Y, La, Pr, Nb, Pm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Th, U, and mixtures thereof.
Claim 2
Dependent Claim
113 words
An electrochemical device, comprising a containment vessel and optional ceramic material within the containment vessel and including at least one electrochemical cell, the cell comprising a porous, exposed electrode in contact with a solid electrolyte, the improvement characterized in that at least one of the exposed electrode, the containment vessel, and the optional material within the containment vessel, contains a deposit selected from metal oxide and metal salt capable of forming metal oxide upon heating, where the metal is selected from the group consisting of Ce, Sm, Mg, Be, Ca, Sr, Ti, Zr, Hf, Y, La, Pr, Nb, Pm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Th, U, and mixtures thereof.
Claim 3
Dependent Claim
31 words
The electrochemical device of claim 1, where the electrochemical cell is a fuel cell, and comprises a porous exposed fuel electrode containing nickel, an air electrode, and a solid electrolyte therebetween.
Claim 4
Dependent Claim
29 words
The electrochemical device of claim 1, where the electrochemical cell is a gas sensor, and comprises a porous, exposed sensing electrode, a reference electrode, and a solid electrolyte therebetween.
Claim 5
Dependent Claim
32 words
The electrochemical device of claim 2, where the deposit is a metal salt which is impregnated through the bulk of the exposed electrode and through porous ceramic material within the containment vessel.
Claim 6
Dependent Claim
28 words
The electrochemical device of claim 2, where the deposit is a metal salt and the metal of the metal salt is selected from Ce, Sm and mixtures thereof.
Claim 7
Dependent Claim
27 words
The electrochemical device of claim 2, where the metal salt is a salt selected from the group consisting of nitrate, formate, acetate, propionate, butyrate, and mixtures thereof.
Claim 8
Dependent Claim
83 words
The electrochemical device of claim 2, where the deposit is a metal salt, the device can be operated in a gas feed which contacts the exposed electrode at a temperature of at least 800° C. to form metal oxides from the metal salts, which metal oxides are effective to prevent cell deterioration due to Si and Al deposition from the gas feed, and where a porous ceramic member impregnated with metal salt is disposed between the fuel cell and the gas feed entrance.
Claim 9
Dependent Claim
16 words
The electrochemical device of claim 2, where the electrochemical cell has a tubular, axially elongated configuration.
Claim 10
Dependent Claim
17 words
The electrochemical device of claim 2, where the device comprises a plurality of cells electrically connected together.
Claim 11
Dependent Claim
31 words
The electrochemical device of claim 3, where the deposit is a metal oxide which is coated on the surface of the exposed electrode and on ceramic material within the containment vessel.
Claim 12
Dependent Claim
28 words
The electrochemical device of claim 3, where the deposit is a metal oxide and the metal of the metal oxide is selected from Ce, Sm and mixtures thereof.
Claim 13
Dependent Claim
81 words
The electrochemical device of claim 3, where the deposit is a metal oxide, which contacts the exposed electrode, where the device can be operated in a gas feed which contacts the exposed electrode at a temperature of at least 800° C., which metal oxides are effective to prevent cell deterioration due to Si and Al deposition from the gas feed, and where a porous ceramic member coated with metal oxide is disposed between the gas sensor and the gas feed entrance.
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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) | 1992-12-04 | 1993-06-05 | 1993-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-04 | 1997-06-05 | 1997-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-04 | 2001-06-05 | 2001-12-05 | $7700.00 | Window Closed / Lapsed |