Mechanistic Studies of Isoprene and Aromatic Hydrocarbons

EPA Grant Number: R824789
Title: Mechanistic Studies of Isoprene and Aromatic Hydrocarbons
Investigators: Jeffries, Harvey E.
Institution: University of North Carolina at Chapel Hill
EPA Project Officer: Chung, Serena
Project Period: October 1, 1995 through September 30, 1998
Project Amount: $450,000
RFA: Air Pollutants (1995) Recipients Lists
Research Category: Air Quality and Air Toxics , Air

Description:

The primary purpose of this project is to advance fundamental knowledge of the kinetics and reaction mechanisms for the hydroxy radical and ozone oxidation of isoprene, aromatic hydrocarbons and their daughter products. Experiments will be conducted in three different types of reactors-indoor chamber, continuous stirred tank reactor, and outdoor chamber. New derivative methods, coupled with ion trap mass spectrometric detection, will be used to identify and detect airborne aldehyde, ketone and carboxylic acid products. The new analytical methods allow for measurement of multi-functional carbonyl compounds, which are often among the unidentified photooxidation products. As many of these products are not available commercially, they will be synthesized for use as standards and reactants. The results of this study will produce new observational and modeling data that will greatly expand knowledge of the detailed reaction processes and product production in the atmospheric oxidation of isoprene and aromatic hydrocarbons. These new data will permit the formulation of significantly more accurate photochemical reaction models for use in EPA policy decisions.

Publications and Presentations:

Publications have been submitted on this project: View all 2 publications for this project

Journal Articles:

Journal Articles have been submitted on this project: View all 2 journal articles for this project

Supplemental Keywords:

air, ambient air, atmosphere, ozone, tropospheric, VOC, oxidants, organics, environmental chemistry, modeling, Atlantic coast, North Carolina, NC, Region 4., RFA, Scientific Discipline, Air, Toxics, Geographic Area, air toxics, Environmental Chemistry, HAPS, State, tropospheric ozone, Atmospheric Sciences, EPA Region, ambient air quality, monitoring, region 4, air pollutants, aldehydes, oxidation reactions, hydrocarbon, mass spectrometry, ketone, indoor chamber study, exposure and effects, ambient air, ozone, chemical composition, photochemistry, air sampling, isoprene, photochemical, chemical kinetics, atmospheric aerosols, continnous stirred tank reactor, hydrocarbons, North Carolina (NC), mechanistic study, chemical amalysis

Progress and Final Reports:

  • 1996
  • 1997
  • Final Report