Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Estimating service lives of organic vapor cartridges II: a single vapor at all humidities.

Authors
Wood-GO
Source
J Occup Environ Hyg 2004 Jul; 1(7):472-492
NIOSHTIC No.
20029695
Abstract
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 The complete model has been tested and verified with published and unpublished data from many sources.
Keywords
Organic-vapors; Models; Air-purifying-respirators; Air-purifiers; Air-purification; Respirators; Respiration; Humidity; Author Keywords: cartridge; humidity; organic vapor; respirator; service life
Contact
Gerry Wood, Industiral Hygiene and Safety Group, Mail Stop K-486, Los Alamos National Laboratory, Los Alamos, NM 87545
CODEN
JOEHA2
Publication Date
20040701
Document Type
Journal Article
Email Address
gerry@lanl.gov
Funding Amount
122000
Funding Type
Contract
Fiscal Year
2004
NTIS Accession No.
NTIS Price
Identifying No.
Contract-200-2005-12257
Issue of Publication
7
ISSN
1545-9624
Source Name
Journal of Occupational and Environmental Hygiene
State
NM
TOP