AAAR 36th Annual Conference October 16 - October 20, 2017 Raleigh Convention Center Raleigh, North Carolina, USA
Abstract View
Secondary Organic Aerosol Formation from 3-Methylfuran Oxidation
TAEKYU JOO, Masayuki Takeuchi, Nga Lee Ng, Georgia Institute of Technology
Abstract Number: 198 Working Group: Aerosol Chemistry
Abstract Biomass burning (BB) is an important source of both primary and secondary organic aerosol (SOA). Recent studies suggested that nontraditional precursors such as phenols or furans can contribute to SOA formation from BB considerably. Methylfurans are one of major furan alkyl-derivatives from BB. 3-methylfuran (3MF) is an isomeric compound of the methylfurans which originates not only from BB but also from oxidation of isoprene. Here, we investigate SOA formation from 3MF under various reaction conditions at the Georgia Tech Environmental Chamber (GTEC) facility. Different oxidants were injected into the chamber to compare day and nighttime oxidations of 3MF under dry and humid conditions. In the case of photooxidation by OH radical, reaction was carried out under different NOx conditions where different RO2 fates dominate. N2O5 was injected into the chamber to study nighttime 3MF + NO3 chemistry. Gas- and particle-phase composition were monitored using a Filter Inlet for Gases and AEROsols coupled with time-of-flight chemical ionization mass spectrometer (FIGAERO-ToF-CIMS) and a High Resolution-Time of Flight-Aerosol Mass Spectrometer (HR-ToF-AMS). Decay of 3MF was monitored with a Gas Chromatography Flame Ionization Detector (GC-FID) and volume of aerosol was detected using a Scanning Mobility Particle Sizer (SMPS). Differences in SOA yields under experimental conditions and their respective chemical composition will be discussed.