Skip to Main Content
Gas-phase pyrolysis products emitted by prescribed fires in pine forests with a shrub understory in the southeastern United StatesAuthor(s): N. K. Scharko; A. M. Oeck; T. L. Myers; R. G. Tonkyn; C. A. Banach; S. P. Baker; Emily N. Lincoln; Joey Chong; Bonni M. Corcoran; Gloria M. Burke; Roger D. Ottmar; Joseph C. Restaino; David R. Weise; T. J. Johnson
Source: Atmospheric Chemistry and Physics. 19(15): 9681-9698.
Publication Series: Scientific Journal (JRNL)
Station: Rocky Mountain Research Station
Download Publication (2.0 MB)
DescriptionIn this study we identify pyrolysis gases from prescribed burns conducted in pine forests with a shrub understory captured using a manual extraction device. The device selectively sampled emissions ahead of the flame front, minimizing the collection of oxidized gases, with the captured gases analyzed in the laboratory using infrared (IR) absorption spectroscopy. Results show that emission ratios (ERs) relative to CO for ethene and acetylene were significantly greater than in previous fire studies, suggesting that the sample device was able to collect gases predominantly generated prior to ignition. Further evidence that ignition had not begun was corroborated by novel IR detections of several species, in particular naphthalene. With regards to oxygenated species, several aldehydes (acrolein, furaldehyde, acetaldehyde, formaldehyde) and carboxylic acids (formic, acetic) were all observed; results show that ERs for acetaldehyde were noticeably greater, while ERs for formaldehyde and acetic acid were lower compared to other studies. The acetylene-to-furan ratio also suggests that high-temperature pyrolysis was the dominant process generating the collected gases.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationScharko, N. K.; Oeck, A. M.; Myers, T. L.; Tonkyn, R. G.; Banach, C. A.; Baker, S. P.; Lincoln, Emily N.; Chong, Joey; Corcoran, Bonni M.; Burke, Gloria M.; Ottmar, Roger D.; Restaino, Joseph C.; Weise, David R.; Johnson, T. J. 2019. Gas-phase pyrolysis products emitted by prescribed fires in pine forests with a shrub understory in the southeastern United States. Atmospheric Chemistry and Physics. 19(15): 9681-9698.
Keywordsgas-phase pyrolysis, pine forests, shrub understory, prescribed fires
- Dynamic infrared gas analysis from longleaf pine fuel beds burned in a wind tunnel: observation of phenol in pyrolysis and combustion phases
- Identification of gas-phase pyrolysis products in a prescribed fire: first detections using infrared spectroscopy for naphthalene, methyl nitrite, allene, acrolein and acetaldehyde
- Volatile organic compound emissions during hot-pressing of southern pine particleboard : panel size effects and trade-off between press time and temperature
XML: View XML