Porous ceramic hot gas filters -- Materials and applications
- Westinghouse Science and Technology Center, Pittsburgh, PA (United States)
Extensive evaluation of the performance and material properties of the first generation porous ceramic filters has been conducted during the past three years at Westinghouse. Characterization of the monolithic alumina/mullite and clay bonded silicon carbide candle filter materials after 716 and 1,341 hours of operation in the Westinghouse Advanced Particulate Filtration (W-APF) system at the Ahlstrom pressurized circulating fluidized-bed combustion (PCFBC) test facility in Karhula, Finland, as well as after 5,855 hours of operation at the pressurized fluidized-bed combustion (PFBC) test facility at the American Electric Power (AEP) Tidd Demonstration plant in Brilliant, Ohio, indicated that the porous ceramic filters typically lose process temperature strength and undergo numerous phase changes within the bulk matrix or binder phases, which reflect the impact of both process operating temperature and flue gas chemistry. Several advanced porous ceramic filters have been operated in the W-APF system at AEP`s Tidd plant, and have been placed as coupons both in the combustor freeboard area and above the filter tubesheet. In this paper the authors will discuss the stability of the filter materials, as well as the failure mechanisms which have been encountered in both the monolithic and advanced fiber reinforced ceramic composite filters after long-term process operation in the high temperature PFBC and PCFBC gas environments.
- OSTI ID:
- 233984
- Report Number(s):
- CONF-950908--; ISBN 0-87170-539-7
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
CERAMICS
CHEMICAL VAPOR DEPOSITION
COMPOSITE MATERIALS
COMPRESSION STRENGTH
CRYSTALLIZATION
EXPERIMENTAL DATA
FABRICATION
FAILURES
FILTERS
FOSSIL-FUEL POWER PLANTS
MANUFACTURING
MECHANICAL PROPERTIES
MORPHOLOGY
OPTICAL MICROSCOPY
POROSITY
SCANNING ELECTRON MICROSCOPY
TENSILE PROPERTIES
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY