Materials Science Division coal technology seventh quarterly report, April--June 1976. [Gasification plant materials]

Technical Report · Thu Jan 01 00:00:00 EST 1976

DOI:https://doi.org/10.2172/7337617· OSTI ID:7337617

Preliminary analysis of test results of 15 ceramic refractories for slagging gasifiers indicates that the magnesia-chrome, chrome-bonded alumina, and fusion-cast spinel bricks have substantially better abrasion-corrosion resistance than the other compositions. Thermal-shock testing has indicated that resistance to spalling of ceramic coatings can be improved with the use of graded alumina-chromia and magnesia-alumina multilayer coatings. The first corrosion-erosion test run for a total of 100-h exposure has been completed by Solar, Inc. Of the ceramic coatings, only magnesium zirconate survived the exposure. The refractory specimens exposed simultaneously with the coated metal specimens exhibited moderate or no attack. The in-situ erosion measuring system for the main coal feed line for the Synthane coal-gasification pilot plant has been installed and initial tests have been completed. A thermodynamic approach has been developed to characterize the gas environment in different pilot-plant coal-gasification processes. The analysis is used to examine the thermodynamic stability of iron- and nickel-base alloys in these process environments. The results show that the sulfur and oxygen potentials in all the processes are in a region where chromium oxide will be thermodynamically stable. In the absence of a continuous oxide layer, sulfidation of the alloys is expected, which can lead to severe corrosion rates, particularly when liquid nickel sulfides are formed. It is concluded that a protective Cr/sub 2/O/sub 3/ layer is essential for an effective application of these alloys in coal-conversion processes. Failures of HYGAS pilot-plant components resulted from, or were aggravated by, operation under off-design conditions, which resulted in much more corrosive environments than would have occurred under design conditions.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: US Energy Research and Development Administration (ERDA)
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 7337617
• Report Number(s): ANL-76-111
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
36 MATERIALS SCIENCE
42 ENGINEERING
COAL GASIFICATION PLANTS
REFRACTORIES
CORROSION RESISTANCE
TESTING
SLAGS
CORROSIVE EFFECTS
PROTECTIVE COATINGS
EROSION
FUEL FEEDING SYSTEMS
ULTRASONIC TESTING
IRON BASE ALLOYS
CORROSION
NICKEL BASE ALLOYS
MATHEMATICAL MODELS
BELLOWS
FAILURES
PIPE FITTINGS
ABRASION
CERAMICS
FABRICATION
PERFORMANCE TESTING
THERMAL SHOCK
ACOUSTIC EMISSION TESTING
INDUSTRIAL RADIOGRAPHY
INFRARED SURVEYS
LEAK TESTING
NONDESTRUCTIVE TESTING
PHASE DIAGRAMS
PILOT PLANTS
SULFIDES
THERMODYNAMICS
CHLORIDES
HYGAS PROCESS
INCOLOY 800
METALLOGRAPHY
ACOUSTIC TESTING
ALLOYS
CHALCOGENIDES
CHEMICAL REACTIONS
CHLORINE COMPOUNDS
CHROMIUM ALLOYS
COAL GASIFICATION
COATINGS
DIAGRAMS
FUEL SYSTEMS
FUNCTIONAL MODELS
GASIFICATION
GEOPHYSICAL SURVEYS
HALIDES
HALOGEN COMPOUNDS
HEAT RESISTING ALLOYS
INCOLOY ALLOYS
INDUSTRIAL PLANTS
IRON ALLOYS
MATERIALS TESTING
MECHANICAL STRUCTURES
NICKEL ALLOYS
SNG PROCESSES
SULFUR COMPOUNDS
010404* - Coal
Lignite
& Peat- Gasification
360105 - Metals & Alloys- Corrosion & Erosion
360205 - Ceramics
Cermets
& Refractories- Corrosion & Erosion
420500 - Engineering- Materials Testing