气候变化领域集成服务门户(CCPortal): Evaluation of the Oxidation Flow Reactor for particulate matter emission limit certification

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DOI	10.1016/j.atmosenv.2019.117086
	Evaluation of the Oxidation Flow Reactor for particulate matter emission limit certification
	Cao J.; Wang Q.; Li L.; Zhang Y.; Tian J.; Chen L.W.A.; Ho S.S.H.; Wang X.; Chow J.C.; Watson J.G.
发表日期	2020
ISSN	1352-2310
卷号	224
英文摘要	As secondary aerosols become larger fractions of ambient PM2.5, emission factors and source profiles need to reflect the photochemical aging of multipollutant emissions that account for changes in transport between source and receptor. Oxidation Flow Reactors (OFR) intend to simulate gas/particle transformation and volatilization with time-scales of hours to days in order to estimate mass gains or losses due to atmospheric aging. The commercially-available Potential Aerosol Mass (PAM)-OFR (Aerodyne Research, LLC, Billerica, MA, USA) is evaluated for its feasibility in establishing an emission limit certification protocol for China and for determining changes to source marker abundances used in source apportionment model applications. The OFR without ultraviolet radiation is reasonably inert to the passage of reactive gases, such as sulfur dioxide (SO2), and particles >~100 nm. The largest uncertainty in estimating aging times is the commonly used assumption that the average atmospheric hydroxyl concentration (OHatm) is 1.5 × 106 molecules/cm3; measurements show that OHatm can vary by an order of magnitude in different environments. OH exposures (OHexp) estimated within the OFR are more precise than this assumption. Plug flow is a reasonable estimate of residence time within the OFR, as it does not differ much from the weighted-mean of the residence time distribution. A survey of previous studies shows that only a few examine the PAM-OFR performance, and that mass is both gained and lost with aging, depending on the combustion fuels, burning conditions, and aging times. At present, the OFR appears to be more practical for source profile aging than for emission certification, and further experiments are needed prior to application for multipollutant effects on particulate emission rates. © 2019 Elsevier Ltd
关键词	Aerosol aging Emission factors Hydroxyl exposure Multipollutant Source characterization
语种	英语
scopus关键词	Aerosols; Atmospheric movements; Particles (particulate matter); Residence time distribution; Sulfur dioxide; Uncertainty analysis; Aerosol aging; Emission factors; Hydroxyl exposure; Multipollutant; Source characterization; Particulate emissions; carbon dioxide; carbon monoxide; sulfur dioxide; aerosol composition; certification; flow pattern; hydroxyl radical; particulate matter; photochemistry; pollution exposure; residence time; source apportionment; transformation; ultraviolet radiation; volatilization; air pollution; combustion; concentration (parameter); evaluation study; gas; oxidation reduction potential; particle size; priority journal; retention time; secondary organic aerosol; suspended particulate matter; China; United States
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/249332
作者单位	Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; Center for Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, Xi'an, 710061, China; Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China; Department of Environmental and Occupational Health, University of Nevada, Las Vegas, NV 89154, United States; Hong Kong Premium Services and Research Laboratory, Hong Kong; Division of Atmospheric Sciences, Desert Research Institute, Reno, NV 89512, United States
推荐引用方式 GB/T 7714	Cao J.,Wang Q.,Li L.,et al. Evaluation of the Oxidation Flow Reactor for particulate matter emission limit certification[J],2020,224.
APA	Cao J..,Wang Q..,Li L..,Zhang Y..,Tian J..,...&Watson J.G..(2020).Evaluation of the Oxidation Flow Reactor for particulate matter emission limit certification.ATMOSPHERIC ENVIRONMENT,224.
MLA	Cao J.,et al."Evaluation of the Oxidation Flow Reactor for particulate matter emission limit certification".ATMOSPHERIC ENVIRONMENT 224(2020).