Materials for syngas coolers. Final report
Technical Report
·
OSTI ID:6811288
The objective of this project is to provide a technical basis for materials selection and laboratory testing of practical boiler tube materials which will provide reliable long term service in syngas coolers for coal gasification combined cycle power plants. The resistance of low alloy steel, stainless steels, and aluminum-rich coatings to attack by a high sulfur, medium Btu coal gasification atmosphere has been evaluated at 300 to 500/sup 0/C. Samples were heated in mixtures representative of the product gas from entrained slagging gasifiers in laboratory furnaces for 1500 to 3000 hr. Iron sulfide scale formed rapidly on low alloy steels with estimated surface recession rates of 20 to 120 mil/y at 300 to 500/sup 0/C. Pack aluminized (alonized), chromized, and thermal sprayed aluminum were indicated to be effective protective coatings for these materials. Medium chrome (11%) stainless steels (409SS) formed thick sulfide-oxide scales with estimated recession rates of 35 to 50 mil/y at 400 to 500/sup 0/C. High Cr (>23%) ferritic and austenitic stainless steels (Ebrite 26-1, 309SS, 310SS, HK40)FeCrA1Y, and titanium had the best resistance to attack with estimated recession rates of <0.15 mil/y. These materials may have adequate resistance for long time service in radiant coolers operating up to 500/sup 0/C on high sulfur medium Btu gas. Performance is analyzed in terms of thermodynamic and kinetic considerations, and recommendations for long term tests and development of protective coatings are presented.
- Research Organization:
- Lockheed Missiles and Space Co., Palo Alto, CA (USA). Lockheed Palo Alto Research Lab.
- OSTI ID:
- 6811288
- Report Number(s):
- EPRI-AP-2518; ON: DE82906452
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
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CHEMICAL REACTIONS
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COATINGS
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GAS FUELS
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HEAT EXCHANGERS
HIGH TEMPERATURE
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IRON BASE ALLOYS
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010404 -- Coal
Lignite
& Peat-- Gasification
20 FOSSIL-FUELED POWER PLANTS
200104* -- Fossil-Fueled Power Plants-- Components
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
BOILERS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
COAL GASIFICATION PLANTS
COATINGS
COMBINED-CYCLE POWER PLANTS
COOLING
CORROSION
CORROSION PROTECTION
CORROSION RESISTANT ALLOYS
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASES
HEAT EXCHANGERS
HIGH TEMPERATURE
INDUSTRIAL PLANTS
IRON ALLOYS
IRON BASE ALLOYS
POWER PLANTS
PROTECTIVE COATINGS
STAINLESS STEELS
STEELS
THERMAL POWER PLANTS