Relative rate constants for the heterogeneous reactions of OH, NO"2 and NO radicals with polycyclic aromatic hydrocarbons adsorbed on carbonaceous ... [An article from: Atmospheric Environment]

This digital document is a journal article from Atmospheric Environment, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
A discharge flow reactor was used to study the heterogeneous reactions of OH, NO"2 and NO radicals with 11 polycyclic aromatic hydrocarbons (PAHs) adsorbed on 1-2@mm calibrated graphite particles. Graphite was chosen as a simple model of carbonaceous atmospheric particles. Relative kinetic information was obtained from the decays of particulate-PAH concentration vs. the time, measured using off-line gas chromatography coupled to mass spectrometry. Particulate-anthracene, -benzo(a)pyrene and -perylene are the most reactive with NO"2, whereas all PAHs studied present similar reactivities with OH within uncertainties. The reactivity of NO under our experimental conditions could not be distinguished from the PAH desorption.