The effect of chemical reactivity on source reconciliation modeling of nonmethane hydrocarbons

Technical Report · Fri Apr 01 00:00:00 EST 1994

DOI:https://doi.org/10.2172/10141715· OSTI ID:10141715

Doskey, P V; Gaffney, J S

Source fingerprints for 18 nonmethane hydrocarbons (NMHCS) containing 2-8 carbon atoms are currently used to apportion NMHC sources by chemical mass balance (CMB) modeling approaches. The source profiles must be stable in the troposphere to obtain accurate CMB model predictions. The NMHC source apportionment compounds are susceptible to gas phase oxidation in the atmosphere by hydroxyl radical (OH). Expected tropospheric lifetimes for peak concentrations of OH in typical urban air range from an hour to over 100 hours. When OH oxidation of a source profile for vehicle tailpipe emissions is simulated, significant changes occur in the distribution of the source apportionment compounds after a reaction time of 2-4 hr. These calculations indicate that sampling strategies to define source-receptor relationships of NMHCs by CMB modeling techniques must be carefully designed to minimize the possibility of NMHC oxidation by OH.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); Illinois Dept. of Energy and Natural Resources, Springfield, IL (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 10141715
• Report Number(s): ANL/ER/PP-74010; ON: DE94009812; TRN: 94:004596
• Resource Relation: Other Information: PBD: [1994]
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
37 INORGANIC
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PHYSICAL AND ANALYTICAL CHEMISTRY
CARBON SOURCES
PATTERN RECOGNITION
MATHEMATICAL MODELS
HYDROCARBONS
HYDROXYL RADICALS
OXIDATION
CHEMICAL REACTION KINETICS
AIR POLLUTION
MASS BALANCE
TROPOSPHERE
CHEMICAL PHYSICS
ATMOSPHERIC CHEMISTRY
540120
990200
400201
CHEMICALS MONITORING AND TRANSPORT
MATHEMATICS AND COMPUTERS
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES