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Diffusion studies of VOC mixtures in a building material
Author(s) -
Meininghaus R.,
Uhde E.
Publication year - 2002
Publication title -
indoor air
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.387
H-Index - 99
eISSN - 1600-0668
pISSN - 0905-6947
DOI - 10.1034/j.1600-0668.2002.01131.x
Subject(s) - diffusion , boiling point , context (archaeology) , volatile organic compound , chemistry , desorption , environmental chemistry , adsorption , chemical engineering , thermodynamics , organic chemistry , engineering , paleontology , physics , biology
Volatile organic compound (VOC) adsorption by indoor materials will reduce peak concentrations, and subsequent desorption will prolong the presence of a compound indoors. Diffusion within materials plays an important role in this context. The purpose of this paper is to present two experimental set-ups to study VOC diffusion, and to show corresponding experimental results. The Field and Laboratory Emission Cell (FLEC) is in both cases an integral part of the set-up. The mass flow of VOC mixtures across gypsum board is studied. Diffusion of less polar VOCs in gypsum board can be fast (diffusion coefficients of 0.001-0.003 m2/h). Diffusion coefficients of chlorinated compounds are correlated with boiling points and molecular areas. Different compounds show similar diffusion properties.