US4374116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of combining gaseous hydrogen and oxygen and apparatus therefor
Assignee: Atomic Energy of Canada Ltd AECL
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Filing: 1981-06-09
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Granted: 1983-02-15
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Expires: 2001-06-09
Abstract
Abstract Gaseous hydrogen and oxygen are combined in an upwardly extending casing containing a catalytic assembly in an intermediate portion of the casing with means for distributing hydrogen gas in the catalytic assembly, distributing cooling water and oxygen feeds downwardly from a top portion of the casing on to the catalytic assembly and draining water from a bottom portion of the casing is recirculated. Combined oxygen and hydrogen entrained in the draining water are extracted by tapping water from the recirculating draining water. The catalyst assembly comprises high surface area, porous supports with platinum in the pores and a polytetrafluoroethylene coating over the supports, the platinum particles comprising about 0.1 to about 0.5 weight % of the total weight of the supports, platinum and polytetrafluoroethylene, and the polytetrafluoroethylene comprises about 2 to about 4 weight % of the total weight of support, platinum and polytetrafluoroethylene. Preferably the catalyst assembly has hydrophilic packing interspersed with the porous supports.
Inventors
- 👤 Karl T. Chuang
- 👤 Maurice F. Roett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:40
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/42; B01J31/00; B01J31/02; B01J31/06; B01J8/00; B01J8/02; B01J8/0242; B01J8/025; B01J8/04; B01J8/0446; B01J8/0449; B01J8/0453; B01J8/0492; C; C01; C01B; C01B5/00; B01J2208/00; B01J2208/02; B01J2208/023; B01J2208/024; B01J2208/025
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
204 words
A method of combining gaseous hydrogen and oxygen comprising: (a) distributing a flow of gaseous hydrogen in a catalytic assembly located in and substantially filling an intermediate portion of an upwardly extending casing, (b) distributing a flow of cooling water, from a cooling water inlet to the casing, downwardly into the catalytic assembly from an upper portion of the casing, (c) distributing gaseous oxygen in the upper portion of the casing, (d) circulating draining water from a lower portion of the casing to the cooling water inlet, and (e) removing a portion of the water from circulation, and wherein (f) the catalyst assembly comprises at least one high surface area, inert, porous support with platinum particles embedded in the pores, and beneath the exterior thereof, and a polytetrafluoroethylene coating thereon over the platinum particules comprising about 0.1 to about 0.5 weight % of the total weight of support, platinum and polytetrafluoroethylene present in the catalyst assembly, and the polytetrafluoroethylene comprising about 2 to about 4 weight % of the total weight of support, platinum and polytetrafluoroethylene present in the catalyst assembly, so that: (g) the catalyst does not rapidly lose its activity by contact with the cooling water and has a good conversion efficiency.
Claim 2
Independent Claim
204 words
A method of combining gaseous hydrogen and oxygen comprising: (a) distributing a flow of gaseous hydrogen in a catalytic assembly located in and substantially filling an intermediate portion of an upwardly extending casing, (b) distributing a flow of cooling water, from a cooling water inlet to the casing, downwardly into the catalytic assembly from an upper portion of the casing, (c) distributing gaseous oxygen in the upper portion of the casing, (d) circulating draining water from a lower portion of the casing to the cooling water inlet, and (e) removing a portion of the water from circulation, and wherein (f) the catalyst assembly comprises at least one high surface area, inert, porous support with platinum particles embedded in the pores, and beneath the exterior thereof, and a polytetrafluoroethylene coating thereon over the platinum particules comprising about 0.1 to about 0.5 weight % of the total weight of support, platinum and polytetrafluoroethylene present in the catalyst assembly, and the polytetrafluoroethylene comprising about 2 to about 4 weight % of the total weight of support, platinum and polytetrafluoroethylene present in the catalyst assembly, so that: (g) the catalyst does not rapidly lose its activity by contact with the cooling water and has a good conversion efficiency.
Claim 3
Dependent Claim
29 words
A method according to claim 1, wherein the platinum particles comprise about 0.2 weight % of the total weight of support, platinum and polytetrafluoroethylene present in the catalyst assembly.
Claim 4
Dependent Claim
31 words
A method according to claim 1, wherein the polytetrafluoroethylene comprises about 2.5 to about 3.5 weight % of the total weight of support, platinum and polytetrafluoroethylene present in the catalyst assembly.
Claim 5
Dependent Claim
28 words
A method according to claim 1, wherein the polytetrafluoroethylene comprises about 3 weight % of the total weight of support, platinum and polytetrafluoroethylene present in the catalyst assembly.
References Cited (Backward Citations)
CA467626A
Cited
GB858079A
Cited
US4171350A
Cited
JPS5028398A
Cited
DE2852019A1
Cited
JPS55126502A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |