Engineering support services for the DOE/GRI coal-gasification research program. Technical and economic assessment of the Westinghouse fluidized-bed coal gasification process
Kellogg was requested by DOE/GRI to perform a technical and economic assessment of the Westinghouse fluidized bed coal gasification process as applied to production of SNG equivalent to 250 billion BTU/day from Pittsburgh No. 8 coal. Based on operating experiences in the PDU, where most of the key variables have been demonstrated during 5+ years of testing, Westinghouse provided process data for the gasifier area. Kellogg selected the overall processing sequence and established design bases for the balance of the plant. This work was subsequent to a previous (1979) screening evaluation of Westinghouse by Kellogg: comparison of the two designs reveals the following: The 1980 gasifier design basis, while more detailed, is almost identical to that of 1979. The gas treatment and sulfur recovery schemes were significantly changed: Combined shift/methanation was substituted for stand-alone reaction units; independent Selexol units for removal of H/sub 2/S and CO/sub 2/ replaced a non-selective Benfield unit; and a Claus-SCOT combination replaced Stretford units and significantly improved the flue gas desulfurization. Key results of the current efforts are compared with those of the screening evaluation. The reductions in efficiencies in the new calculations are attributed to a more realistic evaluation of plant energy requirements and to lack of optimization of individual plant section designs. The economic data indicate that a noteworthy reduction in gas cost was accomplished by a reduction in the capital cost of the plant, such that Kellogg concludes, as previously for the screening evaluation, that the Westinghouse process appears to be superior to existing processes (i.e., Lurgi) and at least competitive with other processes evaluated under the DOE/GRI joint program.
- Research Organization:
- Kellogg (M.W.) Co., Houston, TX (USA)
- DOE Contract Number:
- AC01-78ET10324
- OSTI ID:
- 5618590
- Report Number(s):
- DOE/ET/10324-T25; FE-2778-43; ON: DE83010967
- Resource Relation:
- Other Information: Portions are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL GASIFICATION PLANTS
ECONOMICS
ENGINEERING
HIGH BTU GAS
COST
WESTINGHOUSE GASIFICATION PROCESS
TECHNOLOGY ASSESSMENT
BENFIELD PROCESS
CLAUS PROCESS
COAL GASIFICATION
DESIGN
FLOWSHEETS
FUEL GAS
LURGI PROCESS
METHANATION
NUMERICAL DATA
SELEXOL PROCESS
SHIFT PROCESSES
CHEMICAL REACTIONS
DATA
DIAGRAMS
FLUIDS
FUELS
GAS FUELS
GASES
GASIFICATION
INDUSTRIAL PLANTS
INFORMATION
THERMOCHEMICAL PROCESSES
010404* - Coal
Lignite
& Peat- Gasification