STP1287

    Attempting to Characterize the Sink Effect in a Small Stainless Steel Test Chamber

    Published: Jan 1996


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    Abstract

    Small environmental test chambers may present wall adsorption for volatile organic compounds (VOC), which must be known for correct emission or adsorption rate determinations on indoor materials. Experiments in a 0.28 m3 stainless steel chamber, in the dynamic (air flow through the chamber) and static mode (no flow), with n-decane and n-dodecane are described. Further experiments with a 0.45 m3 glass chamber and more compounds are reported. The concentration versus time data were used as input for a new mathematical model with two sink compartments (“two-sink” model), which is described. The model provides a much better regression of data points than the previous “sink” model. The two sinks show greatly different rate constants. The model provides a reasonable description of the mass balance in adsorption-desorption experiments.

    Keywords:

    test chamber, mathematical model, sink, adsorption, desorption, n-decane, n-dodecane, VOC


    Author Information:

    De Bortoli, M
    Research scientists, Environment Institute, Joint Research Centre of the European Commission, Ispra,

    Knöppel, H
    Research scientists, Environment Institute, Joint Research Centre of the European Commission, Ispra,

    Columbo, A
    Research scientists, Environment Institute, Joint Research Centre of the European Commission, Ispra,

    Kefalopoulos, S
    Research scientists, Environment Institute, Joint Research Centre of the European Commission, Ispra,


    Paper ID: STP15629S

    Committee/Subcommittee: D22.01

    DOI: 10.1520/STP15629S


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