||Development of a LiOH Scrubber to Remove CO2 from Air Samples for (14)C Analysis.
Stiles, D. C. ;
Ellenson, W. D. ;
Lewis, C. W. ;
||ManTech Environmental Technology, Inc., Research Triangle Park, NC.;Environmental Protection Agency, Research Triangle Park, NC. National Exposure Research Lab.
Lithium hydroxide ;
Air pollution sampling ;
Carbon 14 ;
Carbon dioxide ;
Ecological concentration ;
Design analysis ;
Air pollution control ;
NMOC(Non-Methane Organic Compounds) ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
A LiOH scrubber system that can be used to remove the CO2 from up to 1 cu m of ambient air for C-14 analysis of the non-methane organic compounds (NMOCs) was developed and tested. The basic scrubber design consists of a cylinder filled with LiOH with ends plugged with glass wool. Engineering charts were developed to facilitate the selection of the best geometry for a given sampling task, based on required sampling rates, total sample volume, pump pressure drop capacity, and desired residence time. The residual CO2 levels and the potential loss of NMOCs in the sample passing through the scrubber were characterized for several LiOH scrubber geometries. There is an indication that the concentrations of some of the aldehyde and ketone compounds in another test mixture were reduced upon passing through the LiOH scrubber.