Calibration of the Cloud and Aerosol Spectrometer for Coal Dust Composition and Morphology

Details

• Personal Author:
  Baran AJ ; Barone TL ; Beck, Timothy W. ; Harris, Marcia L. ; Hesse E ; Jacques PA ; Lee T ; Mischler, Steven E. ; Seaman CE
• Description:
  The cloud and aerosol spectrometer (CAS) was calibrated to enable CAS sizing of coal dust for studies on flammable dust control. Coal dust sizes were determined by light-scattering theories for irregular particles that account for particle composition and morphology in computing coal dust diameters. Coal dust size computations were compared with test dust that was generated by cyclone separation and air-jet sieving and characterized by aerodynamic particle sizer (APS) and computer-controlled scanning electron microscopy (CCSEM) measurements. For test dust in the range of 0.5-32 µm, coal dust size distributions were consistent with cyclone-separated and sieve-segregated sizes. For the 3-20 µm size range, the coal dust size distribution had a mass median diameter that was 14% larger than that of the APS. This difference was reasonable considering that the basic calibration for glass spheres had 13% uncertainty. For the 20-32 µm and 32-45 µm test dusts, mass median diameters differed from CCSEM measurements by only 4% and 5%, respectively. Overall, the results suggest agreement between test dust sizes and computations for coal dust. Alternatively, using conventional Mie theory computations for spheres, coal dust mass median diameters were 35% and 40% larger than APS and CCSEM measurements, respectively. [Description provided by NIOSH]
• Subjects:
  Aerosols Dust Fires Occupational Health Particulate Matter Safety
• Keywords:
  Aerodynamic Particle Sizer Agglomeration Author Keywords: Optical Spectrometer Coal Dust Computer-controlled Scanning Electron Microscopy Dust Control Dust Particles Dusts Electron Microscopy Fire Hazards Particle Size Particle Size Distribution

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• Series:
  Mining Publications
• ISSN:
  0921-8831
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  California ; OSHA Region 3 ; OSHA Region 9 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PMRD - Pittsburgh Mining Research Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  30
• Issue:
  9
• NIOSHTIC Number:
  nn:20056258
• Citation:
  Adv Powder Technol 2019 Sep; 30(9):1805-1814
• Contact Point Address:
  T.L. Barone, Pittsburgh Mining Research Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, 626 Cochrans Mill Road, Pittsburgh, PA 15236, United States
• Email:
  tbarone@cdc.gov
• Federal Fiscal Year:
  2019
• Peer Reviewed:
  True
• Source Full Name:
  Advanced Powder Technology
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:027507d2e6d42282fae53faef11e80a88261ff3b5a9359e2c02c6ab71509bb515600c9cb377ac3f01ff7da3dcc8b2d79c27437855a0b2623ae77114482124c75
• Download URL:
  https://stacks.cdc.gov/view/cdc/227883/cdc_227883_DS1.pdf
• File Type:
  [PDF - 474.43 KB ]