气候变化领域集成服务门户(CCPortal): Technical note: Pyrolysis principles explain time-resolved organic aerosol release from biomass burning

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DOI	10.5194/acp-21-15605-2021
	Technical note: Pyrolysis principles explain time-resolved organic aerosol release from biomass burning
	Fawaz M.; Avery A.; Onasch T.B.; Williams L.R.; Bond T.C.
发表日期	2021
ISSN	1680-7316
起始页码	15605
结束页码	15618
卷号	21 期号:20
英文摘要	Emission of organic aerosol (OA) from wood combustion is not well constrained; understanding the governing factors of OA emissions would aid in explaining the reported variability. Pyrolysis of the wood during combustion is the process that produces and releases OA precursors. We performed controlled pyrolysis experiments at representative combustion conditions. The conditions changed were the temperature, wood length, wood moisture content, and wood type. The mass loss of the wood, the particle concentrations, and light-gas concentrations were measured continuously. The experiments were repeatable as shown by a single experiment, performed nine times, in which the real-time particle concentration varied by a maximum of 20 %. Higher temperatures increased the mass loss rate and the released concentration of gases and particles. Large wood size had a lower yield of particles than the small size because of higher mass transfer resistance. Reactions outside the wood became important between 500 and 600g ° C. Elevated moisture content reduced product formation because heat received was shared between pyrolysis reactions and moisture evaporation. The thermophysical properties, especially the thermal diffusivity, of wood controlled the difference in the mass loss rate and emission among seven wood types. This work demonstrates that OA emission from wood pyrolysis is a deterministic process that depends on transport phenomena. © 2021 Mariam Fawaz et al.
语种	英语
scopus关键词	aerosol; biomass burning; combustion; experimental study; pyrolysis; wood
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246488
作者单位	Department of Civil and Environmental Engineering, University of Illinois Urbana-Champaign, 205 N Mathews Ave., Urbana, IL 61801, United States; Aerodyne Research Inc., Billerica, MS 01821, United States; Department of Mechanical Engineering, Colorado State University, 400 Isotope Dr., Fort Collins, CO 80521, United States
推荐引用方式 GB/T 7714	Fawaz M.,Avery A.,Onasch T.B.,et al. Technical note: Pyrolysis principles explain time-resolved organic aerosol release from biomass burning[J],2021,21(20).
APA	Fawaz M.,Avery A.,Onasch T.B.,Williams L.R.,&Bond T.C..(2021).Technical note: Pyrolysis principles explain time-resolved organic aerosol release from biomass burning.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(20).
MLA	Fawaz M.,et al."Technical note: Pyrolysis principles explain time-resolved organic aerosol release from biomass burning".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.20(2021).