Corrosion of syngas coolers in coal gasification combined cycle power plants
A coal gasification combined cycle (CGCC) demonstration plant is presently operating in Daggett, California (Cool Water Gasification Project). The plant uses an oxygen blown Texaco gasifier designed to convert about 1000 tons of Utah coal per day to a medium Btu gas. After particulate and sulfur removal, the syngas is used to fuel a G.E. combined cycle unit that employs a slightly modified Frame 7 gas turbine-electric generator, a heat recovery steam generator, and a steam turbine electric generator. Steam is also raised in syngas coolers to recover the sensible heat of the raw syngas. The net power plant output is 90-100 megawatts. Extensive studies of corrosion of materials in gasification environments have been carried out since about 1973. Unfortunately, most of this work has been carried out in the 700-1000/sup 0/C range and is not directly applicable to syngas cooler design. More recently, isothermal laboratory corrosion studies in the 300-500/sup 0/C range have been carried out and a relatively straightforward relationship between corrosion of low alloy steels and operating temperature has been established. Sulfidation was established as the principal mechanism. Austenitic stainless steels exhibited very low corrosion rates, although a protective oxide scale was not formed.
- OSTI ID:
- 5397361
- Journal Information:
- Mater. Compon. Fossil Energy Appl.; (United States), Vol. 51; Conference: Corrosion/84, New Orleans, LA, USA, Apr 1984
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL GASIFICATION PLANTS
HEAT EXCHANGERS
COMBINED-CYCLE POWER PLANTS
CORROSION
SYNTHETIC FUELS
CORROSIVE EFFECTS
GAS TURBINES
MATERIALS
STAINLESS STEELS
STEAM TURBINES
STEELS
ALLOYS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
FUELS
INDUSTRIAL PLANTS
IRON ALLOYS
IRON BASE ALLOYS
MACHINERY
POWER PLANTS
THERMAL POWER PLANTS
TURBINES
TURBOMACHINERY
010404* - Coal
Lignite
& Peat- Gasification