Materials technology for coal-conversion processes. Twelfth report, July--December 1977
In the evaluation of ceramic refractories for slagging gasifiers the preliminary measurements reported for the relative corrosion resistance of the magnesia-chromia refractories tested in Run 5 have been revised. Significant slag penetration (40 to 50 mm) was observed for all bricks in Run 5. A second-generation coal-feed-line elbow instrumented for erosive wear detection was installed in the Synthane Pilot Plant, and the first-generation elbow has been examined after exposure to 2.2 x 10/sup 6/ kg (approximately 2400 tons) of crushed coal conveyed. Laboratory and theoretical results suggest that a quantitative acoustic leak-detection system may be possible if the leakage flow is ''choked,'', i.e., the exit velocity from the leakage channel is sonic. This is likely to be the case for the relatively large leaks of interest in high-pressure lockhopper applications. Oxidation-sulfidation studies of Fe-Cr-8 wt % Ni alloys with 4, 12, and 22 wt % Cr were conducted at 750 and 875/sup 0/C in multicomponent gas mixtures that contained CO, CO/sub 2/, CH/sub 4/, H/sub 2/, and H/sub 2/S. The reaction processes resulted in parabolic kinetics. For a given sulfur partial pressure, the oxygen partial pressures required for the formation of a continuous oxide layer in an Fe-22 wt % Cr-8 wt % Ni alloy were approximately 10/sup 2/ and 10/sup 3/ times those calculated for Cr-Cr/sub 2/O/sub 3/ equilibrium at temperatures of 875 and 750/sup 0/C, respectively.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 6890436
- Report Number(s):
- ANL-78-6
- Country of Publication:
- United States
- Language:
- English
Similar Records
Oxidation--sulfidation behavior of iron--chromium--nickel alloys. [750 and 875/sup 0/C]
Materials technology for coal-conversion processes. Nineteenth report, July-December 1979
Related Subjects
36 MATERIALS SCIENCE
COAL GASIFICATION PLANTS
MATERIALS TESTING
COAL LIQUEFACTION PLANTS
NONDESTRUCTIVE TESTING
RESEARCH PROGRAMS
REFRACTORIES
CORROSION RESISTANCE
STAINLESS STEELS
THERMOCHEMICAL PROCESSES
VALVES
ACOUSTIC MONITORING
ACOUSTIC EMISSION TESTING
CHEMICAL REACTION KINETICS
CHROMIUM OXIDES
EROSION
FAILURE MODE ANALYSIS
LEAKS
MAGNESIUM OXIDES
METALLOGRAPHY
OXIDATION
STRESS CORROSION
SYNTHANE PROCESS
ULTRASONIC TESTING
ACOUSTIC TESTING
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM COMPOUNDS
COAL GASIFICATION
CONTROL EQUIPMENT
CORROSION
CORROSION RESISTANT ALLOYS
EQUIPMENT
FLOW REGULATORS
GASIFICATION
INDUSTRIAL PLANTS
IRON ALLOYS
IRON BASE ALLOYS
KINETICS
MAGNESIUM COMPOUNDS
MONITORING
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
STEELS
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
TESTING
TRANSITION ELEMENT COMPOUNDS
010404* - Coal
Lignite
& Peat- Gasification
010405 - Coal
Lignite
& Peat- Hydrogenation & Liquefaction
360100 - Metals & Alloys
360200 - Ceramics
Cermets
& Refractories