Testing of refractories in CO-containing coal-gasification atmospheres. Final report. [Alumina concretes]

Technical Report · Tue Mar 01 00:00:00 EST 1983

OSTI ID:6037905

Clancy, T; Heystek, H

In this experiment a series of alumina concretes were exposed to gas environments B and C. Test temperature and pressure were maintained at 500/sup 0/C and 1000 psig. Conclusion are as follows: (1) 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; (2) 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; (3) 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; and (4) 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 for refractories following similar exposures at temperatures of 730/sup 0/-1100/sup 0/C. 6 figures, 1 table.

• Research Organization: Bureau of Mines, Tuscaloosa, AL (USA). Tuscaloosa Research Center
• DOE Contract Number: AI05-80OR20686
• OSTI ID: 6037905
• Report Number(s): DOE/OR/20686-T2; ON: DE83014474
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
36 MATERIALS SCIENCE
AMMONIA
CORROSIVE EFFECTS
CARBON MONOXIDE
COAL GASIFICATION PLANTS
REFRACTORIES
HYDROGEN SULFIDES
MATERIALS TESTING
RESEARCH PROGRAMS
STEAM
ALUMINIUM OXIDES
COGAS PROCESS
CONCRETES
CORROSION RESISTANCE
EXPERIMENTAL DATA
HIGH TEMPERATURE
IRON
IRON OXIDES
MEDIUM PRESSURE
ALUMINIUM COMPOUNDS
BUILDING MATERIALS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
COAL GASIFICATION
DATA
ELEMENTS
GASIFICATION
HYDRIDES
HYDROGEN COMPOUNDS
INDUSTRIAL PLANTS
INFORMATION
IRON COMPOUNDS
MATERIALS
METALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
TESTING
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
010404* - Coal
Lignite
& Peat- Gasification
360205 - Ceramics
Cermets
& Refractories- Corrosion & Erosion