High-temperature-high-pressure cascade impactor design, performance, and data analysis methods
A high-temperature - high-pressure, seven-stage cascade impactor has been designed, built, calibrated, and used to obtain size-classified samples of entrained fly ash from process streams of a pressurized low Btu coal gasifier. The cascade impactor was designed for an effective cutoff diameter (ECD) range of 12 ..mu..m down to about 0.5 ..mu..m aerodynamic diameter. Methods for calculating gas mixture viscosity, density, and mean free path have been developed and used to calculate impactor stage characteristics at operating temperatures and pressures for the gas mixture sampled. Process stream conditions were 400 to 700/sup 0/C and 900 to 1370 kPa. The measured size distribution at stream conditions indicated a mass median aerodynamic diameter (MMAD) of 2.88 +- 0.47 ..mu..m with a geometric standard deviation (sigma/sub g/) of 2.35 +- 0.35.
- Research Organization:
- Lovelace Biomedical and Environmental Research Inst., Albuquerque, NM
- OSTI ID:
- 6100260
- Journal Information:
- J. Colloid Interface Sci.; (United States), Journal Name: J. Colloid Interface Sci.; (United States) Vol. 87:1; ISSN JCISA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010800 -- Coal
Lignite
& Peat-- Waste Management
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AEROSOL WASTES
ASHES
CASCADE IMPACTORS
COAL GASIFICATION
DATA ANALYSIS
DESIGN
EQUIPMENT
FLUIDS
FLY ASH
FUEL GAS
FUELS
GAS FUELS
GASES
GASIFICATION
LOW BTU GAS
PARTICLE SIZE CLASSIFIERS
PERFORMANCE
RESIDUES
THERMOCHEMICAL PROCESSES
WASTES