High temperature corrosion problems in coal gasification systems

Conference · · TMS (The Metallurgical Society) Paper Selection; (USA)

OSTI ID:5395211

Hill, V L ^[1]

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1. Gas Research Institute, Chicago, IL (USA)

Coal gasification plants consist of a variety of interrelated subsystems involving coal preparation, gasification, gas cooling, gas cleaning, reagent production and for substitute natural gas, methanation and compression. High temperature, gas phase corrosion of metals in coal gasification plants occurs principally around the gasifier section of the plant. These corrosion problems arise from a unique combination of low oxygen and high sulfur pressure in the coal-derived gas exiting the gasifier. Similar conditions involving these corrodant species do not exist in current commercial chemical processes. Corrosion tests conducted to date in simulated coal gasification environments have demonstrated that many high-temperature alloys exhibit breakaway corrosion after extended exposure. This effect can occur in coal-derived gas at temperatures which the alloys exhibit excellent resistance in air. To date, the mechanisms of breakaway corrosion have not been established, but it is clear that sulfidation is involved in the process. In all coal gasificaiton plants, subsystems downstream of the gasifier involved in particulate removal and heat recovery must handle high velocity, dust-laden gases. These subsystems are, therefore, subject to a combination of erosion and corrosion. Erosion/corrosion is much more complex mechanistically compared to gas phase corrosion. Hence, the ongoing work has only begun to develop a data base on the performance of high temperature materials.

• OSTI ID: 5395211
• Report Number(s): CONF-840909-; CODEN: TMPSA
• Journal Information: TMS (The Metallurgical Society) Paper Selection; (USA), Vol. 56; Conference: TMS-AIME fall meeting, Detroit, MI (USA), 16-20 Sep 1984; ISSN 0197-1689
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
36 MATERIALS SCIENCE
GAS GENERATORS
CORROSION
HEAT RECOVERY EQUIPMENT
EROSION
SCRUBBERS
CHEMICAL REACTION KINETICS
COAL GAS
COAL GASIFICATION PLANTS
CORROSION RESISTANT ALLOYS
CORROSIVE EFFECTS
HOT GAS CLEANUP
INFORMATION NEEDS
MATERIALS TESTING
OXYGEN
PARTIAL PRESSURE
PARTICULATES
PERFORMANCE TESTING
REMOVAL
SULFIDATION
SULFUR
WASTE PROCESSING PLANTS
ALLOYS
CHEMICAL REACTIONS
ELEMENTS
EQUIPMENT
FLUIDS
GASES
INDUSTRIAL PLANTS
KINETICS
NONMETALS
PARTICLES
POLLUTION CONTROL EQUIPMENT
PURIFICATION
REACTION KINETICS
TESTING
010404* - Coal
Lignite
& Peat- Gasification
360105 - Metals & Alloys- Corrosion & Erosion