Material characterization of the clay bonded silicon carbide candle filters and ash formations in the W-APF system after 500 hours of hot gas filtration at AEP. Appendix to Advanced Particle Filter: Technical progress report No. 11, January--March 1993
Abstract
(1) After 500 hours of operation in the pressurized fluidized-bed combustion gas environment, the fibrous outer membrane along the clay bonded silicon carbide Schumacher Dia Schumalith candles remained intact. The fibrous outer membrane did not permit penetration of fines through the filter wall. (2) An approximate 10-15% loss of material strength occurred within the intact candle clay bonded silicon carbide matrix after 500 hours of exposure to the PFBC gas environment. A relatively uniform strength change resulted within the intact candles throughout the vessel (i.e., top to bottom plenums), as well as within the various cluster ring positions (i.e., outer versus inner ring candle filters). A somewhat higher loss of material strength, i.e., 25% was detected in fractured candle segments removed from the W-APF ash hopper. (3) Sulfur which is present in the pressurized fluidized-bed combustion gas system induced phase changes along the surface of the binder which coats the silicon carbide grains in the Schumacher Dia Schumalith candle filter matrix.
- Authors:
- Publication Date:
- Research Org.:
- Westinghouse Electric Corp., Pittsburgh, PA (United States). Science and Technology Center
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 10182071
- Report Number(s):
- DOE/MC/26042-3449
ON: DE94000450
- DOE Contract Number:
- FC21-89MC26042
- Resource Type:
- Technical Report
- Resource Relation:
- Other Information: PBD: 5 Apr 1993
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 20 FOSSIL-FUELED POWER PLANTS; HOT GAS CLEANUP; TEST FACILITIES; FILTERS; DESIGN; MATERIALS; PROGRESS REPORT; PERFORMANCE TESTING; MECHANICAL PROPERTIES; FLUIDIZED-BED COMBUSTORS; PRESSURIZATION; SILICON CARBIDES; 200202; NOXIOUS GAS AND PARTICULATE EMISSIONS
Citation Formats
Alvin, M.A. Material characterization of the clay bonded silicon carbide candle filters and ash formations in the W-APF system after 500 hours of hot gas filtration at AEP. Appendix to Advanced Particle Filter: Technical progress report No. 11, January--March 1993. United States: N. p., 1993.
Web. doi:10.2172/10182071.
Alvin, M.A. Material characterization of the clay bonded silicon carbide candle filters and ash formations in the W-APF system after 500 hours of hot gas filtration at AEP. Appendix to Advanced Particle Filter: Technical progress report No. 11, January--March 1993. United States. doi:10.2172/10182071.
Alvin, M.A. Mon .
"Material characterization of the clay bonded silicon carbide candle filters and ash formations in the W-APF system after 500 hours of hot gas filtration at AEP. Appendix to Advanced Particle Filter: Technical progress report No. 11, January--March 1993". United States.
doi:10.2172/10182071. https://www.osti.gov/servlets/purl/10182071.
@article{osti_10182071,
title = {Material characterization of the clay bonded silicon carbide candle filters and ash formations in the W-APF system after 500 hours of hot gas filtration at AEP. Appendix to Advanced Particle Filter: Technical progress report No. 11, January--March 1993},
author = {Alvin, M.A.},
abstractNote = {(1) After 500 hours of operation in the pressurized fluidized-bed combustion gas environment, the fibrous outer membrane along the clay bonded silicon carbide Schumacher Dia Schumalith candles remained intact. The fibrous outer membrane did not permit penetration of fines through the filter wall. (2) An approximate 10-15% loss of material strength occurred within the intact candle clay bonded silicon carbide matrix after 500 hours of exposure to the PFBC gas environment. A relatively uniform strength change resulted within the intact candles throughout the vessel (i.e., top to bottom plenums), as well as within the various cluster ring positions (i.e., outer versus inner ring candle filters). A somewhat higher loss of material strength, i.e., 25% was detected in fractured candle segments removed from the W-APF ash hopper. (3) Sulfur which is present in the pressurized fluidized-bed combustion gas system induced phase changes along the surface of the binder which coats the silicon carbide grains in the Schumacher Dia Schumalith candle filter matrix.},
doi = {10.2172/10182071},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Apr 05 00:00:00 EDT 1993},
month = {Mon Apr 05 00:00:00 EDT 1993}
}
-
Advancements have been made during the past five years to not only increase the strength of the as-manufactured clay bonded silicon carbide candle filter materials, but also to improve their high temperature creep resistance properties. This report reviews these developments, and describes the results of preliminary qualification testing which has been conducted at Westinghouse prior to utilizing the advanced clay bonded silicon carbide filters in high temperature, pressurized, coal-fired combustion and/or gasification applications.
-
Performance of PRD-66 hot gas candle filters in the AEP/TIDD PFBC facility
The performance of PRD-66 hot gas filters in American Electric Power`s TIDD PFBC facility is described. PRD-66 hot gas filters are made of an all-oxide composition with a unique layered microstructure which lends corrosion resistance, high temperature stability and excellent resistance to thermal shock damage. The development of the PRD-66 material into a hot gas candle filter is recounted. Testing which guided filter development prior to exposure in the AEP/TIDD PFBC system is discussed. Future plans for testing in coal combustion and other industrial applications are described. -
Microstructure and Fracture of Some SiC-based Clay Bonded Hot Gas Filter Materials After Exposure to Thermal Cycling and/or High Temperature Water Vapour
The purpose of this study is to characterize microstructural changes and analyze their possible effect to long term durability and reliability of SiC-based clay bonded hot gas filters. -
Review of corrosion behavior of ceramic heat exchanger materals: Corrosion characteristics of silicon carbide and silicon nitride. Final report, September 11, 1992--March 11, 1993
The present work is a review of the substantial effort that has been made to measure and understand the effects of corrosion with respect to the properties, performance, and durability of various forms of silicon carbide and silicon nitride. The review encompasses corrosion in diverse environments, usually at temperatures of 1000C or higher. The environments include dry and moist oxygen, mixtures of hot gaseous vapors, molten salts, molten metals, and complex environments pertaining to coal ashes and slags.