US5820655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid Electrolyte ionic conductor reactor design
Assignee: Praxair Technology Inc
•
Filing: 1997-04-29
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Granted: 1998-10-13
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Expires: 2017-04-29
Abstract
Abstract An ion transport reactor and process for using same having at least one ion transport membrane with a retentate side and a permeate side, for extracting oxygen from a feed gas stream as it flows along the retentate side. A reactant gas stream is flowed along the permeate side of the ion transport tubes to react with the oxygen transported therethrough. Heat is transferred to a fluid stream flowing through the ion transport reactor while the temperature of the membrane is maintained within its operating range.
Inventors
- 👤 Christian Friedrich Gottzmann
- 👤 Ravi Prasad
- 👤 Victor Emmanuel Bergsten
- 👤 Nitin Ramesh Keskar
- 👤 Bart Antonie van Hassel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:06
CPC Classifications
C; C01; C01B; C01B13/00; C01B13/02; C01B13/0229; C01B13/0248; C01B13/0251; C01B13/0255; B; B01; B01D; B01D53/00; B01D53/22; B01D53/32; B01D53/326; B01D63/00; B01D63/06; B01D63/062; B01J; B01J12/00; B01J12/007; B01J19/00; B01J19/24; B01J19/2415; B01J19/2425; B01J19/2475; B01D2313/00; B01D2313/42; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00076; B01J2219/00081; B01J2219/00085; B01J2219/0015; B01J2219/00155; C01B2210/00; C01B2210/0043; C01B2210/0046; C01B2210/0078; C01B2210/0082
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
125 words
A process for reacting a reactant gas stream with oxygen from a feed gas stream containing elemental oxygen and at least one other gas using an ion transport reactor including an ion transport membrane having a retentate side and a permeate side, said process comprising: (a) flowing the feed gas stream on the retentate side of the ion transport membrane; and (b) flowing the reactant gas stream on the permeate side of the ion transport membrane, wherein heat generated from the reactant gas stream reacting with the oxygen permeating through the ion transport membrane is transferred to the feed gas stream to heat the feed gas stream while maintaining the temperature of the ion transport membrane within the operation range of the ion transport membrane.
Claim 2
Dependent Claim
125 words
A process for reacting a reactant gas stream with oxygen from a feed gas stream containing elemental oxygen and at least one other gas using an ion transport reactor including an ion transport membrane having a retentate side and a permeate side, said process comprising: (a) flowing the feed gas stream on the retentate side of the ion transport membrane; and (b) flowing the reactant gas stream on the permeate side of the ion transport membrane, wherein heat generated from the reactant gas stream reacting with the oxygen permeating through the ion transport membrane is transferred to the feed gas stream to heat the feed gas stream while maintaining the temperature of the ion transport membrane within the operation range of the ion transport membrane.
Claim 3
Dependent Claim
19 words
The process according to claim 1 wherein the operation range is from about 500° C. to about 1100° C.
Claim 4
Dependent Claim
24 words
The process according to claim 1 wherein the temperature along the ion transport membrane is kept substantially constant throughout the length of the membrane.
Claim 5
Dependent Claim
25 words
The process according to claim 3 wherein the temperature along the ion transport membrane is maintained relatively constant within a range of about 200° C.
Claim 6
Dependent Claim
37 words
The process according to claim 1 whereby the resistances to oxygen permeation and reaction kinetics are apportioned such that the partial pressure of oxygen on the permeate side of the membrane is kept above 10 -16 atm.
Claim 7
Dependent Claim
37 words
The process according to claim 1 wherein the ion transport membrane has porous catalyst layers added to at least part of the permeate side of the ion transport membrane to enhance the chemical reactions on the surface.
Claim 8
Dependent Claim
23 words
The process according to claim 1 wherein at least part of one side of the membrane is doped to enhance surface exchange kinetics.
Claim 9
Dependent Claim
43 words
The process according to claim 1 wherein the flow of the feed gas stream is channeled along the retentate surface of the ion transport membrane through a feed gas passage between the ion transport membrane and a shroud to minimize gaseous diffusion resistance.
Claim 10
Dependent Claim
39 words
The process according to claim 8 wherein the heat transfer to the feed gas passage is modified by at least one of a variable geometry, variable baffle spacing, variable pitch spiral inserts, and an insulating insert of variable thickness.
Claim 11
Dependent Claim
39 words
The process according to claim 1 wherein at least a portion of the heat from the heat of reaction generated by operation of the ion transport membrane is transferred to a fluid stream flowing through the ion transport reactor.
Claim 12
Dependent Claim
36 words
The process according to claim 10 wherein at least one of the heat transfer areas and heat transfer coefficients vary inversely with the difference in temperature between the feed gas stream and the ion transport membrane.
Claim 13
Dependent Claim
94 words
The process according to claim 1 wherein the feed gas stream is divided into a first feed gas portion which is fed into the reactor and provides oxygen for reacting with the reactant gas stream, whereby heat is generated, the heat being employed to heat at least the first feed gas portion which transfers heat to an ion transport separator module including an ion transport separator membrane having a retentate side and a permeate side through which a second feed gas portion flows and from which oxygen is extracted along the permeate side thereof.
Claim 14
Dependent Claim
85 words
The process according to claim 1 wherein the feed gas stream first enters a separator stage where oxygen is extracted, by pressure-driven ion transport using an ion transport separator membrane, to a nonreacting gas side and the feed gas stream then enters the ion transport reactor where additional oxygen is extracted using the ion transport membrane to react with the reactant gas stream to produce a reaction product gas stream which is then used to purge the permeate side of the ion transport separator membrane.
Claim 15
Dependent Claim
150 words
An ion transport reactor for separating a feed gas stream containing elemental oxygen and at least one other gas, said reactor comprising: at least one ion transport tube having a membrane capable of transporting oxygen ions, the ion transport membrane having a retentate side and a permeate side, for extracting oxygen from the feed gas stream as it flows along the retentate side; wherein a reactant gas stream is flowed along the permeate side of the ion transport tubes to react with the oxygen permeating therethrough; wherein at least a portion of the heat from the heat of reaction generated by operation of the ion transport tube is transferred to a fluid stream flowing through the ion transport reactor; and wherein at least one of the heat transfer areas and heat transfer coefficients vary inversely with the difference in temperature between the feed gas stream and the ion transport membrane.
Claim 16
Dependent Claim
150 words
An ion transport reactor for separating a feed gas stream containing elemental oxygen and at least one other gas, said reactor comprising: at least one ion transport tube having a membrane capable of transporting oxygen ions, the ion transport membrane having a retentate side and a permeate side, for extracting oxygen from the feed gas stream as it flows along the retentate side; wherein a reactant gas stream is flowed along the permeate side of the ion transport tubes to react with the oxygen permeating therethrough; wherein at least a portion of the heat from the heat of reaction generated by operation of the ion transport tube is transferred to a fluid stream flowing through the ion transport reactor; and wherein at least one of the heat transfer areas and heat transfer coefficients vary inversely with the difference in temperature between the feed gas stream and the ion transport membrane.
Claim 17
Dependent Claim
44 words
The ion transport reactor according to claim 14 further including a concentric tube within or surrounding at least part of each ion transport tube to form an annular passage therebetween for directing the flow of the feed gas stream along the ion transport tube.
Claim 18
Dependent Claim
22 words
The ion transport reactor according to claim 15 wherein the width of the annular passage is selected to minimize gaseous diffusion resistance.
Claim 19
Dependent Claim
74 words
The ion transport reactor according to claim 14 wherein at least one of the heat transfer areas and heat transfer coefficients vary along the length of the feed gas passage on the shell side by virtue of variable baffle spacing to achieve large heat transfer resistance where the difference in temperature is large and to achieve small heat transfer resistance where the difference in temperature is small or by virtue of variable insulation thickness.
Claim 20
Dependent Claim
18 words
The ion transport reactor according to claim 14 wherein the ion transport tube is closed at one end.
Claim 21
Dependent Claim
22 words
The ion transport reactor according to claim 14 wherein the feed gas stream flows along the outer of the ion transport tube.
Claim 22
Dependent Claim
29 words
The ion transport reactor according to claim 14 wherein the feed gas stream flows in a cross-counter, concurrent or countercurrent flow direction with respect to the ion transport tube.
Claim 23
Dependent Claim
24 words
The ion transport reactor according to claim 20 wherein the flow of the feed gas stream in directed baffles arranged with varied axial spacing.
Claim 24
Dependent Claim
23 words
The ion transport reactor according to claim 14 wherein the reactant gas stream flows along the inner side of the ion transport tube.
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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) | 2001-10-12 | 2002-04-13 | 2002-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-10-12 | 2006-04-13 | 2006-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-10-12 | 2010-04-13 | 2010-10-13 | $7700.00 | Window Closed / Lapsed |