Analytical Aspects Relating to the Estimation of Carbon Filter Performance for Military Applications
Final rept. May 1995-Sep 2011
ARMY EDGEWOOD CHEMICAL BIOLOGICAL CENTER APG MD ENGINEERING DIRECTORATE
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The ability to estimate the gas capacity of carbon-based filters in military applications is important to the engineering and design communities. These design aspects factor into the configuration, performance, and service aspects of the filter. This effort was undertaken to conduct a detailed review of analytical developments that have been pursued in the past with respect to breakthrough estimation, to provide a rationale for the various parameters used in current breakthrough relationships, and to demonstrate the analytical complexity that results from fundamental mass balance expressions. This complexity is often addressed through several simplifying assumptions and the use of correlative relationships to estimate the breakthrough of carbon-based adsorbent systems used in military applications. The analytical developments contained herein are based on fundamental engineering principles and concepts relating to mass conservation. The dynamics associated with the transfer of energy are not considered in this report. This review effort focused on contaminant materials having relatively low room-temperature vapor pressures and exhibiting Type I Brunauer, Edward, and Teller BET isotherms. Many compounds that exhibit such property characteristics are effectively removed by activated carbon substrates through a mechanistic pathway termed physical adsorption.
- Physical Chemistry
- Miscellaneous Materials
- Chemical, Biological and Radiological Warfare