US4389288A
Expired / Lapsed
US
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Catalyzed electrochemical gasification of carbonaceous materials at anode and production of hydrogen at cathode
Assignee: Chevron USA Inc
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Filing: 1981-09-28
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Granted: 1983-06-21
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Expires: 2001-09-28
Abstract
Abstract The electrochemical gasification reaction of carbonaceous materials by anodic oxidation in an aqueous acidic electrolyte to produce oxides of carbon at the anode and hydrogen at the cathode of an electrolysis cell is catalyzed by the use of an iron catalyst.
Inventors
- 👤 Ronald J. Vaughan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:10
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/46; C02F1/461; C02F1/467; C02F1/4672; C10; C10J; C10J3/00; C10J3/02; C10J3/06; C10J3/18; C10J3/72; C10J3/78; C25; C25B; C25B1/00; C25B1/01; C25C; C25C1/00; C02F2101/00; C02F2101/30; C02F2305/00; C02F2305/02; C02F2305/026; C10J2200/00; C10J2200/06; C10J2200/12; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/0916; C10J2300/092; C10J2300/093; C10J2300/0943; C10J2300/0946; C10J2300/0983; C10J2300/0986; Y; Y02; Y02P; Y02P20/00; Y02P20/141; Y02P20/145
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
75 words
In the method of electrochemical gasification of carbonaceous materials in an aqueous acidic electrolyte by anodic oxidation to produce oxides of carbon at the anode and hydrogen at the cathode of an electrolysis cell, the improvement which comprises: adding an amount of iron in its elemental, +2 or +3 valence state or mixtures thereof to the electrolyte containing the carbonaceous material sufficient to increase the rate of oxidation of the carbonaceous material at the anode.
Claim 2
Dependent Claim
75 words
In the method of electrochemical gasification of carbonaceous materials in an aqueous acidic electrolyte by anodic oxidation to produce oxides of carbon at the anode and hydrogen at the cathode of an electrolysis cell, the improvement which comprises: adding an amount of iron in its elemental, +2 or +3 valence state or mixtures thereof to the electrolyte containing the carbonaceous material sufficient to increase the rate of oxidation of the carbonaceous material at the anode.
Claim 3
Dependent Claim
21 words
The method according to claim 1 wherein the iron is present as a salt in a +2 or +3 oxidation state.
Claim 4
Dependent Claim
23 words
The method according to claim 1 wherein the electrochemical process is conducted at a temperature of from about 25° C. to 350° C.
Claim 5
Dependent Claim
18 words
The method according to claim 3 wherein the temperature is in the range of from about 120°-300° C.
Claim 6
Dependent Claim
22 words
The method according to claim 3 wherein the iron catalyst is present at a concentration of from about 0.04 to 0.5 molar.
Claim 7
Dependent Claim
22 words
The method according to claim 5 wherein the iron catalyst is present at a concentration of from about 0.05 to 0.1 molar.
Claim 8
Dependent Claim
36 words
The method according to claim 1 wherein said carbonaceous materials are selected from the group consisting of coal, lignite, peat, char, coke, charcoal, soot, carbon black, activated carbon, asphalt, graphite, wood, biomass materials, or sewage sludge.
Claim 9
Dependent Claim
18 words
The method according to claim 1 wherein the aqueous acidic electrolyte has a pH of 3 or less.
Claim 10
Dependent Claim
70 words
In the method of electrochemical gasification of carbonaceous materials in an aqueous acidic electrolyte by anodic oxidation to produce oxides of carbon at the anode of an electrolysis cell, the improvement which comprises adding an amount of iron in its elemental, +2 or +3 valence state or mixtures thereof to the electrolyte containing the carbonaceous material sufficient to increase the rate of oxidation of the carbonaceous material at the anode.
Claim 11
Dependent Claim
70 words
In the method of electrochemical gasification of carbonaceous materials in an aqueous acidic electrolyte by anodic oxidation to produce oxides of carbon at the anode of an electrolysis cell, the improvement which comprises adding an amount of iron in its elemental, +2 or +3 valence state or mixtures thereof to the electrolyte containing the carbonaceous material sufficient to increase the rate of oxidation of the carbonaceous material at the anode.
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) | 1986-06-20 | 1986-12-20 | 1987-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-20 | 1990-12-20 | 1991-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-20 | 1994-12-20 | 1995-06-21 | $7700.00 | Window Closed / Lapsed |