Perspiration Poisoning of Protective Clothing Materials. Part II. Mathematical Model for a Complex Adsorption Bed
Abstract
A mathematical model is developed using the method of moments for the adsorption of carbon tetrachloride vapor by carbon impregnated foam material. This material was developed by the U. S. Army Natick R&D Command for use as a protective overgarment to adsorb toxic agents. Problems associated with the modeling of this system include the following uncertainties: amount of carbon in a sample, carbon particle size and distribution, and characterization of flow through a foam matrix embedded with carbon. A method of grouping constants with the rate parameters was devised to give a coefficient representative of the rate parameter contained within the grouping. It was found that the adsorption models obtained by assuming the rate determining mechanism of adsorption to be either diffusion from the bulk gas to the particle, pore diffusion, or surface adsorption were not significantly different. A model based on an overall mass transfer coefficient was developed, and when this coefficient was evaluated from the first moment equation, the overall coefficient model fit the data well. This procedure offers an alternative approach to modeling an adsorption process in which the true controlling mechanisms of mass transfer are not known.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1974
- Accession Number
- ADA100235
Entities
People
- J. K. Ferrell
- M. R. Branscome
- R. W. Rousseau
Organizations
- North Carolina State University