High temperature alkali corrosion of ceramics in coal gas: Final report

Technical Report · Sat Dec 31 00:00:00 EST 1994

DOI:https://doi.org/10.2172/61097· OSTI ID:61097

Pickrell, G R; Sun, T; Brown, Jr, J J

There are several ceramic materials which are currently being considered for use as structural elements in coal combustion and coal conversion systems because of their thermal and mechanical properties. These include alumina (refractories, membranes, heat engines); silicon carbide and silicon nitride (turbine engines, internal combustion engines, heat exchangers, particulate filters); zirconia (internal combustion engines, turbine engines, refractories); and mullite and cordierite (particulate filters, refractories, heat exchangers). High temperature alkali corrosion has been known to cause premature failure of ceramic components used in advanced high temperature coal combustion systems such as coal gasification and clean-up, coal fired gas turbines, and high efficiency heat engines. The objective of this research is to systematically evaluate the alkali corrosion resistance of the most commonly used structural ceramics including silicon carbide, silicon nitride, cordierite, mullite, alumina, aluminum titanate, and zirconia. The study consists of identification of the alkali reaction products and determination of the kinetics of the alkali reactions as a function of temperature and time. 145 refs., 29 figs., 12 tabs.

• Research Organization: Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States). Dept. of Materials Science and Engineering
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG22-91PC91309
• OSTI ID: 61097
• Report Number(s): DOE/PC/91309-T14; ON: DE95011387; TRN: AHC29516%%32
• Resource Relation: Other Information: PBD: 31 Dec 1994
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
01 COAL, LIGNITE, AND PEAT
ALUMINIUM OXIDES
CORROSION RESISTANCE
SILICON CARBIDES
SILICON NITRIDES
ZIRCONIUM OXIDES
MULLITE
ALUMINIUM SILICATES
IRON SILICATES
MAGNESIUM SILICATES
ALKALI METALS
CORROSIVE EFFECTS
TITANIUM OXIDES
PROGRESS REPORT
CHEMICAL REACTION KINETICS
PHASE DIAGRAMS
EXPERIMENTAL DATA
CHEMICAL COMPOSITION
CORROSION PRODUCTS
SODIUM
POTASSIUM
CALCIUM
MEASURING METHODS
USES