Spontaneous electrostatic precipitation of dust. Research report
The report provides fundamental research information on the electrostatic behavior of coal mine dust. The results will be used to help determine whether a precipitator should be designed that would function by the spontaneous exchange of electric charge between coal mine dust and polymer surfaces. The following conclusions were reached: (1) Electrification occurs upon contact of materials; rubbing is not required; (2) Electrification occurs by electron injection and not by polarization of dipoles; (3) The direction of electron transfer depends on the electron-donor or electron-acceptor character of the outermost surfaces of the materials in contact; (4) Some pairs of materials transferred as many as 4 x 10 to the 12th power electrons/cm; (5) Strong electrification of dusts took place in a fraction of a second, but weaker charge transfer took longer; (6) The transfer of charge between an insulated polymer surface and impinging dust particles diminishes as the surface charge builds up on the polymer; (7) The charge transfer characteristics of polymers were modified by incorporating acidic or basic additives. (GRA)
- Research Organization:
- Lehigh Univ., Bethlehem, PA (USA)
- OSTI ID:
- 7299769
- Report Number(s):
- PB-222850/0; BM-OFR-55-73
- Country of Publication:
- United States
- Language:
- English
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COAL FINES
ELECTRICAL PROPERTIES
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COAL MINES
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DUSTS
CARBONACEOUS MATERIALS
ENERGY SOURCES
EQUIPMENT
FOSSIL FUELS
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