Testing of refractories in co-containing coal gasification atmospheres. Final report
Based on test data obtained on refractory samples exposed for 1000 hours to three steam-containing high-Btu atmospheres of different compositions at 500/sup 0/ C and 1000 psig it would appear that for the conditions tested commercial intermediate alumina insulating or dense refractory concretes would perform adequately as linings for dry-ash coal gasifiers. CO disintegration was not observed in commercial refractories reported to contain Fe/sub 2/O/sub 3/ exposed to a high-Btu gas composition containing CO whether or not NH/sub 3/ and H/sub 2/S were present. In the 90 pct alumina dense concrete with a 0.1 pct iron (as Fe) powder addition it was found that the strength and abrasion resistance were adversely affected by the presence of CO, but only when NH/sub 3/ and H/sub 2/S were not present. The presence of H/sub 2/S in a gas composition appear to retard or prevent CO disintegration of refractories containing additions of iron or iron oxide. Strength and abrasion resistance increases were noted for intermediate alumina castables exposed to the high-Btu atmospheres when compared to air exposures. Decreases in strength values occurred for the high alumina materials. This is characteristic of the results obtained in earlier studies of refractories following similar exposures at temperatures of 730/sup 0/ to 1100/sup 0/ C. 6 figures.
- Research Organization:
- Bureau of Mines, Tuscaloosa, AL (USA). Tuscaloosa Research Center
- DOE Contract Number:
- AI05-82OR20992
- OSTI ID:
- 6008396
- Report Number(s):
- DOE/OR/20992-T1; ON: DE85006097
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
CARBON MONOXIDE
CORROSIVE EFFECTS
COAL GASIFICATION PLANTS
MATERIALS TESTING
REFRACTORIES
COMPRESSION STRENGTH
WEAR RESISTANCE
ALUMINIUM OXIDES
AMMONIA
CONCRETES
DECOMPOSITION
EXPERIMENTAL DATA
HIGH TEMPERATURE
HYDROGEN SULFIDES
IRON OXIDES
MEDIUM PRESSURE
TEMPERATURE EFFECTS
ALUMINIUM COMPOUNDS
BUILDING MATERIALS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
HYDRIDES
HYDROGEN COMPOUNDS
INDUSTRIAL PLANTS
INFORMATION
IRON COMPOUNDS
MATERIALS
MECHANICAL PROPERTIES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
TESTING
TRANSITION ELEMENT COMPOUNDS
010404* - Coal
Lignite
& Peat- Gasification
360203 - Ceramics
Cermets
& Refractories- Mechanical Properties