Modeling Adsorption Bed Behavior Using a Microcomputer

Details

• Personal Author:
  Forbes SL ; Underhill DW
• Description:
  Gas adsorption beds range in size from small gas sampling cartridges to large tanks containing many tons of charcoal for the control of radioactive offgases from nuclear reactors. In these, and the many other applications where the breakthrough of only a small fraction of the input could be harmful, the need for a simple procedure to predict performance as a function of time is self-evident. Yet some mathematical models in current use inadequately describe the breakthrough of contaminant as a function of time. As an example of poor fit of a theoretical curve to experimental results, Figure 1 shows the fit of the Mecklenberg and Wheeler equations to a breakthrough curve obtained from a respirator cartridge. Only from zero to 40 percent breakthrough can these equations be considered adequate, and even in this range there are difficulties caused by the fact that both the Mecklenberg and Wheeler equations give a poor prediction of the rate of increase in breakthrough as a function of time. More importantly, calculations of the capacity of an adsorption bed, as well as determining the efficiency of mass transfer within an adsorption bed, depend on fitting an equation to the entire breakthrough curve, and for this purpose both the Mecklenberg and Wheeler equations are totally inadequate. [Description provided by NIOSH]
• Subjects:
  Occupational Health Safety
• Keywords:
  Adsorption Air Pollution Control Equipment Analytical Models Gas Adsorption Gases Gas Sampling Mathematical Models
• ISSN:
  0894-0630
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  61-64
• Volume:
  36
• Issue:
  1
• NIOSHTIC Number:
  nn:20060332
• Citation:
  JAPCA 1986 Jan; 36(1):61-64
• Federal Fiscal Year:
  1986
• Performing Organization:
  University of Pittsburgh at Pittsburgh, Pittsburgh, Pennsylvania
• Peer Reviewed:
  True
• Start Date:
  19840401
• Source Full Name:
  Journal of Air Pollution Control Association
• End Date:
  19870331
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:59fc72b9c6374f219c53cedab9d8d1191c140708ee190ce40abe3939421b1cc5aa1d36e0ea235c766eb9d42675cd42de91a224f697056efd1cf8e1c81003cb2c
• Download URL:
  https://stacks.cdc.gov/view/cdc/224274/cdc_224274_DS1.pdf
• File Type:
  [PDF - 788.87 KB ]