Estimating Service Lives of Organic Vapor Cartridges II: A Single Vapor at All Humidities

Details

• Personal Author:
  Wood GO
• Description:
  A widely used equation model for estimating service lives of organic vapor air-purifying respirator cartridges has been updated with more recent research results. It has been expanded to account for effects of high relative humidities. Adsorption capacity competition between water vapor and organic vapor is largely explained by mutual exclusion of adsorption volume of the activated carbon. The Dubinin/Radushkevich equation is used to describe the adsorption isotherms of both water and organic vapors. Effects of relative humidity and adsorbed water on adsorption rates are described by an empirical correlation with breakthrough times. The dynamic natures of adsorption and competition are incorporated using an expanding zone model with displaced water rollup. The complete model has been tested and verified with published and unpublished data from many sources. [Description provided by NIOSH]
• Subjects:
  Air Pollutants, Occupational Humidity Occupational Health Respiratory Protective Devices Respiratory System Safety
• Keywords:
  Air-purification Air-purifiers Air-purifying-respirators Author Keywords: Cartridge Models Organic-vapors Organic Vapor Respiration Respirator Respirators Service Life

  More +
• ISSN:
  1545-9624
• Document Type:
  Text
• Funding:
  Contract
• Genre:
  Journal Article
• Place as Subject:
  New Mexico ; OSHA Region 6
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  472-492
• Volume:
  1
• Issue:
  7
• NIOSHTIC Number:
  nn:20029695
• Citation:
  J Occup Environ Hyg 2004 Jul; 1(7):472-492
• Contact Point Address:
  Gerry Wood, Industiral Hygiene and Safety Group, Mail Stop K-486, Los Alamos National Laboratory, Los Alamos, NM 87545
• Email:
  gerry@lanl.gov
• Federal Fiscal Year:
  2004
• Peer Reviewed:
  True
• Start Date:
  20050517
• Source Full Name:
  Journal of Occupational and Environmental Hygiene
• End Date:
  20060215
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:05efafd1e488c63baaf5af635c8b5d3b90f4b7dac7e7907c2d53aa66f763654fa612d04940e3e8aa6beee7c137a38dff1126a359e352c8fb45380af66c836692
• Download URL:
  https://stacks.cdc.gov/view/cdc/190623/cdc_190623_DS1.pdf
• File Type:
  [PDF - 570.73 KB ]