USDA Forest Service

Pacific Southwest Research Station

 
Pacific Southwest
Research Station

800 Buchanan Street
Albany, CA 94710-0011
(510) 883-8830
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Publications and Products

Title: Dynamic infrared gas analysis from longleaf pine fuel beds burned in a wind tunnel: observation of phenol in pyrolysis and combustion phases

Authors: Banach, Catherine A.; Bradley, Ashley M.; Tonkyn, Russell G.; Williams, Olivia N.; Chong, Joey; Weise, David R.; Myers, Tanya L.; Johnson, Timothy J.

Date: 2021

Source Atmospheric Measurement Techniques. 14(3): 2359-2376

Abstract: Pyrolysis is the first step in a series of chemical and physical processes that produce flammable organic gases from wildland fuels that can result in a wildland fire. We report results using a new time-resolved Fourier transform infrared (FTIR) method that correlates the measured FTIR spectrum with an infrared thermal image sequence, enabling the identification and quantification of gases within different phases of the fire process. The flame from burning fuel beds composed of pine needles (Pinus palustris) and mixtures of sparkleberry, fetterbush, and inkberry plants was the natural heat source for pyrolysis. Extractive gas samples were analyzed and identified in both static and dynamic modes synchronized to thermal infrared imaging: a total of 29 gases were identified including small alkanes, alkenes, aldehydes, nitrogen compounds, and aromatics, most previously measured by FTIR in wildland fires. This study presents one of the first identifications of phenol associated with both pre-combustion and combustion phases using ca. 1 Hz temporal resolution. Preliminary results indicate ∼2.5× greater phenol emissions from sparkleberry and inkberry compared to fetterbush, with differing temporal profiles.

Keywords: Fourier transform infrared, biomass burning, benzene, naphthalene, Pinus palustris, Lyonia lucida, Vaccinium arboreum

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Citation

    Banach, Catherine A.; Bradley, Ashley M.; Tonkyn, Russell G.; Williams, Olivia N.; Chong, Joey; Weise, David R.; Myers, Tanya L.; Johnson, Timothy J. 2021. Dynamic infrared gas analysis from longleaf pine fuel beds burned in a wind tunnel: observation of phenol in pyrolysis and combustion phases. Atmospheric Measurement Techniques. 14(3): 2359-2376. https://doi.org/10.5194/amt-14-2359-2021.
Last Modified: April 20, 2021