US5026536A
Expired / Lapsed
US
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Hydrogen production from hydrocarbon
Assignee: PETROLEUM ENERGY CENTER A CORP OF JAPAN
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Filing: 1989-12-18
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Granted: 1991-06-25
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Expires: 2009-12-18
Abstract
Abstract A process is disclosed for producing hydrogen of high purity from hydrocarbons. A selected hydrocarbon feed is contacted with a nickel-containing sorbent of a specified composition at below 50 kg/cm 2 G and at from 150° to 500° C. The hydrocarbon feed thus treated is further reformed with a catalyst of a specified composition.
Inventors
- 👤 Tomonori Shioiri
- 👤 Shinichi Satake
- 👤 Yasuo Sekido
- 👤 Tokuo Fujisou
- 👤 Akira Obuchi
- 👤 Hideharu Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:31
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/38; C01B2203/00; C01B2203/02; C01B2203/0205; C01B2203/0227; C01B2203/0233; C01B2203/0283; C01B2203/08; C01B2203/0872; C01B2203/0883; C01B2203/10; C01B2203/1005; C01B2203/1011; C01B2203/1041; C01B2203/1047; C01B2203/1052; C01B2203/1058; C01B2203/1076; C01B2203/1082; C01B2203/1094; C01B2203/12; C01B2203/1205; C01B2203/1211; C01B2203/1235; C01B2203/1241; C01B2203/1247; C01B2203/1258; C01B2203/1264; C01B2203/127
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
151 words
A process for producing hydrogen from a hydrocarbon feed which is naphtha, kerosene or natural gas, said hydrocarbon feed having sulfur content between 0.5 and 300 ppm by weight, which consists of steps of 1) contacting said hydrocarbon feed with a nickel-containing sorbent in the presence of steam and hydrogen-containing gas at a pressure of lower than 50 kg/cm 2 G, at a temperature of 250° to 500° C. and at a GHSV of 100 to 5,000 hr -1 or at an LHSV of 0.1 to 10 hr 1 to obtain a reaction mixture, and 2) subsequently treating said reaction mixture with a steam reforming catalyst in a steam reformer at a pressure of lower than 50 kg/cm 2 G, at a temperature of 400° to 600° C. at a catalyst bed inlet and 600° to 850° C. at a catalyst bed outlet and recovering reformed gas from the steam reformer.
Claim 2
Dependent Claim
151 words
A process for producing hydrogen from a hydrocarbon feed which is naphtha, kerosene or natural gas, said hydrocarbon feed having sulfur content between 0.5 and 300 ppm by weight, which consists of steps of 1) contacting said hydrocarbon feed with a nickel-containing sorbent in the presence of steam and hydrogen-containing gas at a pressure of lower than 50 kg/cm 2 G, at a temperature of 250° to 500° C. and at a GHSV of 100 to 5,000 hr -1 or at an LHSV of 0.1 to 10 hr 1 to obtain a reaction mixture, and 2) subsequently treating said reaction mixture with a steam reforming catalyst in a steam reformer at a pressure of lower than 50 kg/cm 2 G, at a temperature of 400° to 600° C. at a catalyst bed inlet and 600° to 850° C. at a catalyst bed outlet and recovering reformed gas from the steam reformer.
Claim 3
Dependent Claim
23 words
The process according to claim 1 wherein the steam is added in a ratio of steam to carbon of 0.1 to 7.0 mol/atom.
Claim 4
Dependent Claim
21 words
The process according to claim 1 wherein the hydrocarbon feed has a sulfur content of smaller than 150 ppm by weight.
Claim 5
Dependent Claim
13 words
The process according to claim 1 wherein the hydrocarbon feed is natural gas.
Claim 6
Dependent Claim
14 words
The process according to claim 1 wherein the hydrocarbon feed is naphtha or kerosene.
Claim 7
Dependent Claim
19 words
The process according to claim 1 wherein the sorbent has a nickel content of 30 to 70% by weight.
Claim 8
Dependent Claim
23 words
The process according to claim 1 wherein the catalyst contains nickel as an oxide in an amount of 5 to 50% by weight.
Claim 9
Dependent Claim
24 words
The process according to claim 1 further including hydrogenative desulfurization and hydrogen sulfide adsorption prior to contact of the hydrocarbon feed with the sorbent.
Claim 10
Dependent Claim
19 words
The process according to claim 8 wherein the hydrogenative desulfurization is accomplished by the use of a desulfurization catalyst.
Claim 11
Dependent Claim
19 words
The process according to claim 8 wherein the hydrogen sulfide adsorption is accomplished by the use of an adsorbent.
Claim 12
Dependent Claim
26 words
The process according to claim 9 wherein the catalyst is made up of one metal selected from the group consisting of cobalt-molybdenum, nickel-molybdenum, nickel-cobalt-molybdenum and nickel-tungsten.
Claim 13
Dependent Claim
46 words
The process according to claim 10 wherein the adsorbent is one member selected from the group consisting of sodium hydroxide, potassium hydroxide, magnesium hydroxide, calcium hydroxide, monoethanolamine, diethanolamine, isopropylamine, zinc oxide, copper oxide, iron oxide-chromium oxide, zinc oxide-copper oxide, zinc oxide-molybdenum oxide and zinc oxide-iron oxide.
Claim 14
Dependent Claim
23 words
The process according to claim 1 wherein the mixture from step 1) has a sulfur content of up to 0.2 ppm by weight.
Claim 15
Dependent Claim
20 words
The process according to claim 1 wherein part of the reformed gas from step 2) is recycled to step 1).
Claim 16
Dependent Claim
34 words
The process according to claim 1 wherein said hydrogen containing gas in step 1) contains CO and CO 2 and said CO and CO 2 react with said steam and methane formation is prevented.
Claim 17
Dependent Claim
25 words
The process according to claim 1 wherein the feed is naphtha and the reaction proceeds for 600 hours or kerosene for up to 10,000 hours.
Claim 18
Dependent Claim
19 words
The process according to claim 1 wherein the feed is natural gas and the reaction proceeds for 2,400 hours.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-06-24 | 1994-12-24 | 1995-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-24 | 1998-12-24 | 1999-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-24 | 2002-12-24 | 2003-06-25 | $7700.00 | Window Closed / Lapsed |