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HIGH TEMPERATURE PARTICULATE CONTROL WITH CERAMIC FILTERS
Citation:
Ciliberti, D. HIGH TEMPERATURE PARTICULATE CONTROL WITH CERAMIC FILTERS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/2-77/207 (NTIS PB274485), 1977.
Description:
The report gives results of an assessment of using ceramic materials as filters for fine particulate removal at high temperatures. The program was in two phases. Phase I, directed toward the development of a porous alumina membrane filter, had limited success because of the fragility of the membranes formed, and the difficulty in controlling the pore size distribution of the filters. The major objective of Phase II, concentrating on screening other available materials, was to identify materials with good filtration potential, select one or two of the most promising, and (as rapidly as possible) demonstrate them as hot gas fine particle filters in a several hundred cu m/hr hot test. Initial screening indicated that the most promising was a thin-walled, ceramic, cross-flow monolith, originally produced as a catalyst support for automotive exhaust systems. Screening tests indicated the possibility of virtually 100% removal of even submicron limestone test dust at face velocities and pressure drops not dissimilar from those typical of fabric filtration. Later bench scale tests at around 1000 K confirmed the material's ability to perform well at high temperatures. Final testing, at a larger facility where flows of 4.8 cu m/min at 950 K were achieved, indicated that this ceramic configuration offers great potential as a hot gas filter.