Patent US4164398A successfully refreshed from Google Patents.
Patent US4272399A successfully refreshed from Google Patents.
US4272399A
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Conversion of carbon-containing materials to synthesis gas
Assignee: Solutia Inc
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Filing: 1979-09-21
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Granted: 1981-06-09
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Expires: 1999-09-21
Abstract
Abstract Carbon-containing materials are gasified to produce synthesis gas, a mixture of hydrogen and carbon monoxide, in a three zone unified system (oxidizer, reducer and gasifier) using a metal oxide as the oxygen and heat source for the gasification with steam and carbon dioxide. Synthesis gas contacts the metal oxide prior to the gasification to release the oxygen and convert the synthesis gas to steam and carbon dioxide as the gasification medium.
Inventors
- 👤 George D. Davis
- 👤 James C. Hill
- 👤 Talmage D. McMinn
- 👤 Charles W. Rooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:58
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/22; C01B3/24; C01B3/28; C10; C10J; C10J3/00; C10J3/46; C10J3/54; C10K; C10K1/00; C10K1/002; C10K1/003; C10K1/004; C10K1/005; C10J2300/00; C10J2300/09; C10J2300/0953; C10J2300/0969; C10J2300/16; C10J2300/1625; C10J2300/1637
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
185 words
A continuous process for the gasification of carbon-containing materials in a fluidization system comprising a reduction zone and a gasification zone which comprises: (a) introducing particulate solid oxidant at an elevated temperature into said reduction zone, (b) introducing a carrier gas selected from the group consisting of steam and carbon dioxide, synthesis gas and mixtures thereof substantially devoid of free oxygen into said reduction zone at such a rate to fluidize oxidant and cause it to move upwardly through said system, (c) maintaining said reduction zone under conditions such that when said carrier gas is synthesis gas said oxidant is at least partially reduced and said synthesis gas is oxidized to steam and carbon dioxide, (d) introducing carbon-containing material and steam into said gasification zone whereby said carbon-containing material is injected into and mixed with said upward moving oxidant, steam and carbon dioxide, (e) maintaining said gasification zone under conditions such that said carbon-containing material, steam and carbon dioxide are endothermically reacted to a mixture of carbon monoxide and hydrogen, and (f) withdrawing a gaseous effluent comprising carbon monoxide and hydrogen from said gasification zone.
Claim 2
Dependent Claim
185 words
A continuous process for the gasification of carbon-containing materials in a fluidization system comprising a reduction zone and a gasification zone which comprises: (a) introducing particulate solid oxidant at an elevated temperature into said reduction zone, (b) introducing a carrier gas selected from the group consisting of steam and carbon dioxide, synthesis gas and mixtures thereof substantially devoid of free oxygen into said reduction zone at such a rate to fluidize oxidant and cause it to move upwardly through said system, (c) maintaining said reduction zone under conditions such that when said carrier gas is synthesis gas said oxidant is at least partially reduced and said synthesis gas is oxidized to steam and carbon dioxide, (d) introducing carbon-containing material and steam into said gasification zone whereby said carbon-containing material is injected into and mixed with said upward moving oxidant, steam and carbon dioxide, (e) maintaining said gasification zone under conditions such that said carbon-containing material, steam and carbon dioxide are endothermically reacted to a mixture of carbon monoxide and hydrogen, and (f) withdrawing a gaseous effluent comprising carbon monoxide and hydrogen from said gasification zone.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein said carbon-containing material is coal.
Claim 4
Dependent Claim
18 words
The process of claim 2 wherein said coal is a coal of rank ranging from lignite through anthracite.
Claim 5
Dependent Claim
11 words
The process of claim 1 wherein said carbon-containing material is peat.
Claim 6
Dependent Claim
11 words
The process of claim 1 wherein said carbon-containing material is coke.
Claim 7
Dependent Claim
11 words
The process of claim 1 wherein said carbon-containing material is oil.
Claim 8
Dependent Claim
11 words
The process of claim 6 wherein said oil is fuel oil.
Claim 9
Dependent Claim
17 words
The process of claim 1 wherein said oxidant is a natural or synthetic metal oxide containing material.
Claim 10
Dependent Claim
12 words
The process of claim 8 wherein said material is iron chromite ore.
Claim 11
Dependent Claim
11 words
The process of claim 8 wherein said material contains iron oxide.
Claim 12
Dependent Claim
11 words
The process of claim 8 wherein said material contains copper oxide.
Claim 13
Dependent Claim
11 words
The process of claim 8 wherein said material contains cobalt oxide.
Claim 14
Dependent Claim
11 words
The process of claim 8 wherein said material contains cerium oxide.
Claim 15
Dependent Claim
11 words
The process of claim 8 wherein said material contains manganese oxide.
Claim 16
Dependent Claim
22 words
The process of claim 1 wherein the temperatures maintained in said reduction and gasification zones are from 800° C. to 1200° C.
Claim 17
Dependent Claim
22 words
The process of claim 1 wherein the superficial gas velocity in the reduction and gasification zones is above 10 feet per second.
Claim 18
Dependent Claim
176 words
A continuous process for the gasification of carbon-containing materials in a fluidization system comprising a reduction zone and a gasification zone and an associated oxidation zone which comprises: (a) introducing particulate solid oxidant at an elevated temperature into said reduction zone, (b) introducing a carrier gas selected from the group consisting of steam and carbon dioxide, synthesis gas and mixtures thereof substantially devoid of free oxygen into said reduction zone at such a rate to fluidize said oxidant and cause it to move upwardly through said system, (c) maintaining said reduction zone under conditions such that when said carrier gas is synthesis gas said oxidant is at least partially reduced and said synthesis gas is oxidized to steam and carbon dioxide, (d) introducing carbon-containing material and steam into said gasification zone whereby said carbon-containing material is injected into and mixed with said upward moving oxidant, steam and carbon dioxide, (e) maintaining said gasification zone under conditions such that said carbon-containing material, steam and carbon dioxide are endothermically reacted to a mixture of carbon monoxide and hydrogen,
Claim 19
Dependent Claim
176 words
A continuous process for the gasification of carbon-containing materials in a fluidization system comprising a reduction zone and a gasification zone and an associated oxidation zone which comprises: (a) introducing particulate solid oxidant at an elevated temperature into said reduction zone, (b) introducing a carrier gas selected from the group consisting of steam and carbon dioxide, synthesis gas and mixtures thereof substantially devoid of free oxygen into said reduction zone at such a rate to fluidize said oxidant and cause it to move upwardly through said system, (c) maintaining said reduction zone under conditions such that when said carrier gas is synthesis gas said oxidant is at least partially reduced and said synthesis gas is oxidized to steam and carbon dioxide, (d) introducing carbon-containing material and steam into said gasification zone whereby said carbon-containing material is injected into and mixed with said upward moving oxidant, steam and carbon dioxide, (e) maintaining said gasification zone under conditions such that said carbon-containing material, steam and carbon dioxide are endothermically reacted to a mixture of carbon monoxide and hydrogen,
Claim 20
Dependent Claim
93 words
(f) withdrawing a gaseous effluent comprising carbon monoxide and hydrogen from said gasification zone, (g) withdrawing from said gasification zone and introducing into said oxidation zone said reduced oxidant, (h) introducing an oxidizing gas into said oxidation zone, (i) maintaining said oxidation zone under exothermic conditions such that said oxidant is reoxidized to an oxidized state and reheated to an elevated temperature sufficient to effect oxidation of said carrier gas and gasification of said carbon-containing material, and (j) withdrawing from said oxidation zone and introducing into said reduction zone said reoxidized heated oxidant.
Claim 21
Dependent Claim
93 words
(f) withdrawing a gaseous effluent comprising carbon monoxide and hydrogen from said gasification zone, (g) withdrawing from said gasification zone and introducing into said oxidation zone said reduced oxidant, (h) introducing an oxidizing gas into said oxidation zone, (i) maintaining said oxidation zone under exothermic conditions such that said oxidant is reoxidized to an oxidized state and reheated to an elevated temperature sufficient to effect oxidation of said carrier gas and gasification of said carbon-containing material, and (j) withdrawing from said oxidation zone and introducing into said reduction zone said reoxidized heated oxidant.
Claim 22
Dependent Claim
22 words
The process of claim 17 wherein the gas velocities maintained in said reduction and gasification zones is about 10 feet per second.
Claim 23
Dependent Claim
61 words
The process of claim 19 wherein (a) said oxidant is a synthetic or natural occurring metal oxide-containing material, (b) said reduction zone is maintained at 800° C. to 1200° C., (c) said carbonaceous material is coal of rank from lignite through anthracite, (d) said oxidation zone is maintained at 800° C. to 1200° C., and (e) said oxidizing gas is air.
Claim 24
Dependent Claim
12 words
The process of claim 19 wherein said material is iron oxide containing.
Claim 25
Dependent Claim
12 words
The process of claim 20 wherein said material is iron chromite ore.
References Cited (Backward Citations)
US2602809A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1984-06-08 | 1984-12-08 | 1985-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-08 | 1988-12-08 | 1989-06-09 | $3760.00 | Window Closed / Lapsed |
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