DOI: 10.1016/j.atmosenv.2019.117086
论文题名: Evaluation of the Oxidation Flow Reactor for particulate matter emission limit certification
作者: 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.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 224 语种: 英语
英文关键词: 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
学科: Aerosol aging
; Emission factors
; Hydroxyl exposure
; Multipollutant
; Source characterization
中文摘要: 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 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160503
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Cao J.,Wang Q.,Li L.,et al. Evaluation of the Oxidation Flow Reactor for particulate matter emission limit certification[J]. Atmospheric Environment,2020-01-01,224