A model and tests for prediction of respirator adsorbent behavior.

Details

• Personal Author:
  Corn, Morton
• Description:
  The Wheeler-Dubinin Model absorption model was extended to operate under more reasonable conditions of use such as measurement of multiple absorbable vapors, large adsorbent masses, and at high flow rates. The model was modified to account for increased axial dispersion in large carbon beds. Increased axial dispersion resulted in a decrease in the ratio of the kinetic saturation capacity at 1 percent to complete breakthrough. Breakthrough times deviated from experimentally determined values by as much as 38 percent, with the average deviation equal to 16.5 percent. Studies of the influence of adsorbate polarity on reference vapor selection indicated that electrostatic forces did not influence vapor adsorption when adsorbate polarities were between 0 and 2.50 daltons, and that a single reference vapor can be selected for breakthrough prediction. Studies on the effect of adsorbed water vapor on the kinetic adsorption parameters of the Wheeler equation indicated that the parameters of kinetic rate constant and kinetic saturation capacity decreased in proportion to the amount of water vapor adsorbed. Minimum values were observed at 90 percent relative humidity. [Description provided by NIOSH]
• Content Notes:
  in NTRL, no pdf
• Subjects:
  Occupational Health Personal Protective Equipment Respiratory Protective Devices Safety
• Keywords:
  NIOSH-Grant; Respirators; Respiratory-protective-equipment; Respiratory-protection; Personal-protective-equipment
• Series:
  Grant Final Reports
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Final Grant Report
• Place as Subject:
  Maryland ; OSHA Region 3
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  OEP - Office of Extramural Programs
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-4
• NIOSHTIC Number:
  nn:00182775
• NTIS Accession Number:
  PB89129852
• Citation:
  Department of Environmental Health Sciences, School of Public Health, The John Hopkins University, Baltimore, Maryland, 1987 Dec; :1-4
• Contact Point Address:
  Environmental Health Sciences Johns Hopkins University 615 North Wolfe Street Baltimore, MD 21205
• Federal Fiscal Year:
  1988
• NORA Priority Area:
  Respirators Research
• Performing Organization:
  Johns Hopkins University, Baltimore, Maryland
• Peer Reviewed:
  False
• Start Date:
  19830923
• Source Full Name:
  Department of Environmental Health Sciences, School of Public Health, The John Hopkins University, Baltimore, Maryland
• End Date:
  19890630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:7dc847c09aedf140bc731323e8446b4703641ae07d6ad9e7b7238120dab30b8f7dcaa9b938d34d035f87873a0fe7fec262d5d13dcaf290925445e82b6de3b57d
• Download URL:
  https://stacks.cdc.gov/view/cdc/246169/cdc_246169_DS1.pdf
• File Type:
  [PDF - 168.02 KB ]