An open-cycle magnetohydrodynamic power plant with CO/sub 2/ recycling
A novel concept is proposed in which a CO/sub 2//O/sub 2/ mixture is used instead of O/sub 2/-enriched air as the oxidizer stream for burning coal in magnetohydrodynamic (MHD) electric power generation. When coal is burned with a CO/sub 2//O/sub 2/ oxidizer,the principal gaseous products are approximately 92% CO/sub 2/, 5% H/sub 2/O, and 3% O/sub 2/. Obtaining a high-purity CO/sub 2/ stream from these combustion products is relatively easy compared to that from a conventional flue-gas stream, which contains only about 15% CO/sub 2/. A portion of the high-purity CO/sub 2/ stream would be recycled and mixed with O/sub 2/ (from an air separation unit); the remainder of the CO/sub 2/ could be processed and sold. The CO/sub 2/ MHD system would be approximately 3% less efficient than an O/sub 2/-enriched MHD system with the same thermal input. However, costs associated with the CO/sub 2/ system would be lower, principally because of elimination of NO/sub x/ decomposition equipment and reduced steam generator costs due to lower volumetric flue-gas glow rates. This report describes the CO/sub 2/ MHD concept and provides a first-order evaluation of performance. Costs are also discussed. 35 refs., 4 figs., 4 tabs.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5980863
- Report Number(s):
- CONF-890671-1; ON: DE89015138
- Resource Relation:
- Conference: 27. symposium on engineering aspects of magnetohydrodynamics (SEAM), Reno, NV, USA, 27-29 Jun 1989; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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CARBON DIOXIDE
RECYCLING
COAL-FIRED MHD GENERATORS
COMBUSTION PRODUCTS
MHD POWER PLANTS
TOPPING CYCLES
COMPARATIVE EVALUATIONS
COST
EFFICIENCY
PERFORMANCE
STOICHIOMETRY
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
DIRECT ENERGY CONVERTERS
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OXIDES
OXYGEN COMPOUNDS
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300101* - MHD Generators- Design & Development