Clean coal: what does it cost at the busbar
Ten major options are proposed as an adequate set of variables for evaluating coal fuel technologies. Present standards apply only to direct firing of coal and concentrate on removing 80 to 90% of sulfur oxides. Capital and busbar power costs are compared to select the ten best ways to burn coal. Cost estimates of plants will be used in determining research and development programs for coal utilization and coal conversion. Direct firing options are (1) pulverized low-sulfur coal, (2) high-sulfur coal with wet alkali scrubbing and on-site disposal of sludge, (3) pulverized high-sulfur coal with regenerative scrubbing and gas reduction to elemental sulfur, (4) pulverized coal at atmospheric pressure in a fluidized bed containing dry limestone, and (5) pulverized solvent-refined coal. A liquid firing option uses petroleum-type fuel. Low-Btu gas firing offers two methods: (1) after gasification in a moving bed with Lurgi gasifier and acid gas removal by the Selexol process, and (2) after gasification in atmospheric, two-stage entrained gasifier, with acid gas removed by the Stretford process. Two medium-Btu gas firing methods are: (1) after gasification in slagging moving-bed gasifier with the Selexol process, and (2) after pressurized gasification in two-stage entrained gasifier with Selexol process. (DCK)
- OSTI ID:
- 7237526
- Journal Information:
- EPRI J.; (United States), Journal Name: EPRI J.; (United States) Vol. 1:9; ISSN EPRJD
- Country of Publication:
- United States
- Language:
- English
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CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COAL GASIFICATION
COAL LIQUEFACTION
COAL PREPARATION
COMBUSTION
COMMINUTION
DESULFURIZATION
ECONOMICS
ENERGY SOURCES
ENVIRONMENTAL EFFECTS
FLUIDIZED-BED COMBUSTION
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FUELS
GASIFICATION
IN-SITU PROCESSING
LIQUEFACTION
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POWER PLANTS
PROCESSING
RECOMMENDATIONS
SELEXOL PROCESS
STRETFORD PROCESS
SULFUR COMPOUNDS
SULFUR OXIDES
THERMAL POWER PLANTS