US5637259A
Expired / Lapsed
US
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Process for producing syngas and hydrogen from natural gas using a membrane reactor
Assignee: HER MAJESTY IN RIGHT OF CANADA
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Filing: 1995-12-04
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Granted: 1997-06-10
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Expires: 2015-12-04
Abstract
Abstract Novel procedures are described for the production of syngas fuel intermediates from abundantly available natural gas. The novel procedures include: (a) providing a double tubular hydrogen transfer reactor having an inner tubular wall defining a heated reaction zone containing a catalyst and an outer tubular wall defining an annular zone between the tubular walls, said inner tubular wall including a hydrogen semipermeable membrane portion adapted to permit diffusion of hydrogen therethrough from the reaction zone to the annular zone while being impervious to other gases, (b) passing through said catalytic reaction zone of a feedstock comprising a mixture of methane and oxygen or a mixture of methane and carbon dioxide or a mixture of methane, carbon dioxide and oxygen, (c) continuously removing from the reaction zone at least part of the hydrogen being formed by diffusion thereof through said hydrogen semipermeable membrane into said annular zone, (d) continuously removing diffused hydrogen from said annular zone and (e) continuously removing a product mixture of carbon monoxide and hydrogen from the reaction zone.
Inventors
- 👤 Jan Z. Galuszka
- 👤 Safaa Fouda
- 👤 Raj N. Pandey
- 👤 Shamsuddin Ahmed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:29
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/24; B01J19/2475; B01J8/00; B01J8/008; B01J8/009; B01J8/02; B01J8/06; C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/38; C01B3/386; C01B3/50; C01B3/501; C01B3/503; C01B3/505; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00168; B01J2208/00212; C01B2203/00; C01B2203/02; C01B2203/0205; C01B2203/0227; C01B2203/0238; C01B2203/025; C01B2203/0261; C01B2203/04; C01B2203/0405; C01B2203/041; C01B2203/0465; C01B2203/047; C01B2203/10; C01B2203/1005; C01B2203/1011; C01B2203/1041; C01B2203/1047; C01B2203/1064; C01B2203/1082; C01B2203/12; C01B2203/1205; C01B2203/1211; C01B2203/1235; C01B2203/1241; Y; Y02; Y02P; Y02P20/00; Y02P20/141
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
231 words
A process for producing a fuel intermediate comprising a mixture of carbon monoxide and hydrogen from natural gas that includes: (a) providing a double tubular hydrogen transfer reactor having an inner tubular wall defining a heated reaction zone containing a catalyst and an outer tubular wall defining an annular zone between the tubular walls, said inner tubular wall including a hydrogen semipermeable membrane portion adapted to permit diffusion of hydrogen therethrough from the reaction zone to the annular zone while being impervious to other gases, said membrane portion comprising an inert, porous tubular substrate at least 1 mm thick and having deposited on a surface thereof a dense membrane film composed of a metal or a material selected from the group consisting of silica, alumina, zirconia or zeolite, said dense film having a thickness in the range of from 1 μm to about 25 μm, (b) passing through said catalytic reaction zone of a feedstock comprising a mixture of methane and oxygen or a mixture of methane and carbon dioxide or a mixture of methane, carbon dioxide and oxygen, (c) continuously removing from the reaction zone at least part of the hydrogen being formed by diffusion thereof through said hydrogen semipermeable membrane into said annular zone, (d) continuously removing diffused hydrogen from said annular zone and (e) continuously removing a product mixture of carbon monoxide and hydrogen from the reaction zone.
Claim 2
Dependent Claim
231 words
A process for producing a fuel intermediate comprising a mixture of carbon monoxide and hydrogen from natural gas that includes: (a) providing a double tubular hydrogen transfer reactor having an inner tubular wall defining a heated reaction zone containing a catalyst and an outer tubular wall defining an annular zone between the tubular walls, said inner tubular wall including a hydrogen semipermeable membrane portion adapted to permit diffusion of hydrogen therethrough from the reaction zone to the annular zone while being impervious to other gases, said membrane portion comprising an inert, porous tubular substrate at least 1 mm thick and having deposited on a surface thereof a dense membrane film composed of a metal or a material selected from the group consisting of silica, alumina, zirconia or zeolite, said dense film having a thickness in the range of from 1 μm to about 25 μm, (b) passing through said catalytic reaction zone of a feedstock comprising a mixture of methane and oxygen or a mixture of methane and carbon dioxide or a mixture of methane, carbon dioxide and oxygen, (c) continuously removing from the reaction zone at least part of the hydrogen being formed by diffusion thereof through said hydrogen semipermeable membrane into said annular zone, (d) continuously removing diffused hydrogen from said annular zone and (e) continuously removing a product mixture of carbon monoxide and hydrogen from the reaction zone.
Claim 3
Dependent Claim
21 words
A process according to claim 1 wherein a feedstock comprising a mixture of methane and oxygen is subjected to partial oxidation.
Claim 4
Dependent Claim
25 words
A process according to claim 2 wherein the partial oxidation is carried out at atmospheric pressure and a temperature in the range of 500°-750° C.
Claim 5
Dependent Claim
12 words
A process according to claim 2 wherein the feedstock is natural gas.
Claim 6
Dependent Claim
14 words
A process according to claim 4 wherein the catalyst is a supported palladium catalyst.
Claim 7
Dependent Claim
24 words
A process according to claim 4 wherein said membrane comprises a porous alumina tube having a palladium film superimposed on the inner wall thereof.
Claim 8
Dependent Claim
24 words
A process according to claim 1 wherein a feedstock comprising a mixture of methane and carbon dioxide is reacted in the catalytic reaction zone.
Claim 9
Dependent Claim
12 words
A process according to claim 7 wherein the feedstock is natural gas.
Claim 10
Dependent Claim
24 words
A process according to claim 8 wherein catalytic reaction is carried out at atmospheric pressure and a temperature in the range of 500°-750° C.
Claim 11
Dependent Claim
14 words
A process according to claim 8 wherein the catalyst is a supported palladium catalyst.
Claim 12
Dependent Claim
24 words
A process according to claim 8 wherein said membrane comprises a porous alumina tube having a palladium film superimposed on the inner wall thereof.
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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) | 2000-06-09 | 2000-12-09 | 2001-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-09 | 2004-12-09 | 2005-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-09 | 2008-12-09 | 2009-06-10 | $7700.00 | Window Closed / Lapsed |