Refractories in slagging gasifers. Seventh quarterly progress report, April 1-June 30, 1982
Refractories used in coal gasifiers at high temperatures are subject to severe corrosion by coal-ash slags. Equilibrium relations are being determined for a number of oxide combination of simplified coal-ash slags, mainly in the system CaO-FeO-A1/sub 2/O/sub 3/-SiO/sub 2/, with refractory oxides (MgO, A1/sub 2/O/sub 3/,Cr/sub 2/O/sub 3/) as additional components. Special attention is directed toward chromium oxide-containing phases (mainly A1/sub 2/O/sub 3/-Cr/sub 2/O/sub 3/ solid solutions and various spinel phases involing Cr/sub 2/O/sub 3/ as a component), and toward determining the role of iron oxide in reactions involving such phases with coal-ash slags. The equilibrium relations in systems involving Fe and Cr are dependent on the oxygen potential. The present studies, therefore, are carried out under carefully controlled atmospheric conditions. Most of the runs are made under the relatively reducing conditions of CO/sub 2/-H/sub 2/ atmosphere of ratio CO/sub 2//H/sub 2/=10/1, while additional runs are being made in CO/sub 2/-H/sub 2/ atmospheres of other CO/sub 2//H/sub 2/ ratios, in pure CO/sub 2/, in O/sub 2/-N/sub 2/ atmospheres, in air, or in Ar atmosphere in the presence of metallic Cr.
- Research Organization:
- Pennsylvania State Univ., University Park (USA). Coll. of Earth and Mineral Sciences
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6458678
- Report Number(s):
- DOE/OR/21400-T44; ON: DE84017618
- Country of Publication:
- United States
- Language:
- English
Similar Records
Stability of SiC, Si/sub 3/N/sub 4/, Si/sub 2/N/sub 2/O SIALON and chromium oxide-containing refractories in coal gasification environments. Second annual report, September 1, 1978-August 3, 1979
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Related Subjects
01 COAL, LIGNITE, AND PEAT
36 MATERIALS SCIENCE
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
COAL GASIFICATION PLANTS
ELEMENTS
ENERGY
FREE ENTHALPY
HYDROGEN
INDUSTRIAL PLANTS
IRON COMPOUNDS
IRON OXIDES
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MATERIALS TESTING
MINERALS
NONMETALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
OXYGEN POTENTIAL
PHASE STUDIES
PHYSICAL PROPERTIES
REFRACTORIES
SILICON COMPOUNDS
SILICON OXIDES
SLAGS
SPINELS
TESTING
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
36 MATERIALS SCIENCE
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
COAL GASIFICATION PLANTS
ELEMENTS
ENERGY
FREE ENTHALPY
HYDROGEN
INDUSTRIAL PLANTS
IRON COMPOUNDS
IRON OXIDES
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MATERIALS TESTING
MINERALS
NONMETALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
OXYGEN POTENTIAL
PHASE STUDIES
PHYSICAL PROPERTIES
REFRACTORIES
SILICON COMPOUNDS
SILICON OXIDES
SLAGS
SPINELS
TESTING
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS