Carbon dioxide remediation via oxygen-enriched combustion using dense ceramic membranes
- Hinsdale, IL
- Pittsburgh, PA
A method of combusting pulverized coal by mixing the pulverized coal and an oxidant gas to provide a pulverized coal-oxidant gas mixture and contacting the pulverized coal-oxidant gas mixture with a flame sufficiently hot to combust the mixture. An oxygen-containing gas is passed in contact with a dense ceramic membrane of metal oxide material having electron conductivity and oxygen ion conductivity that is gas-impervious until the oxygen concentration on one side of the membrane is not less than about 30% by volume. An oxidant gas with an oxygen concentration of not less than about 30% by volume and a CO.sub.2 concentration of not less than about 30% by volume and pulverized coal is contacted with a flame sufficiently hot to combust the mixture to produce heat and a flue gas. One dense ceramic membrane disclosed is selected from the group consisting of materials having formulae SrCo.sub.0.8 Fe.sub.0.2 O.sub.x, SrCo.sub.0.5 FeO.sub.x and La.sub.0.2 Sr.sub.0.8 Co.sub.0.4 Fe.sub.0.6 O.sub.x.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- DOE Contract Number:
- W-31109-ENG-38
- Assignee:
- University of Chicago (Chicago, IL)
- Patent Number(s):
- US 6173663
- OSTI ID:
- 873490
- Country of Publication:
- United States
- Language:
- English
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carbon
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ceramic
ceramic membrane
ceramic membranes
coal
coal-oxidant
combust
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conductivity
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contact
contacted
contacting
containing gas
dense
dense ceramic
dioxide
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electron
feo
flame
flue
flue gas
formulae
gas
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gas-impervious
heat
hot
material
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metal
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oxidant
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provide
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sr
srco
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