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Projects->Harvard Environmental Chamber (HEC)


Technical Description


Instrumentation


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    HEC: Research Interests

    The Environmental Chamber is employed to generate secondary-organic-aerosol particles from precursor volatile-organic-carbon molecules under both batch and continuous-flow modes. The chemistry of these particles can be adjusted by controlling reactor conditions (e.g., dark or irradiated, NOx concentrations, presence or absence of OH scavengers, among other factors).

    The following figures show some of the results of our initial alpha-pinene tests.

    Figure 1. Example of SOA generation after a test injection of α-pinene.

    Figure 2. Evolution of particle size distribution of SOA. Top: data from the dark ozonolysis of α-pinene with injection of seed particles. Bottom: predicted evolution by the iterative model, applying parameters determined by traditional empirical model of two-condensable products.

     

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    Copyright ? 2006-2007 Harvard University
    Environmental Chemistry Group
    Updated on Nov. 5, 2007