期刊
ATMOSPHERIC ENVIRONMENT
卷 122, 期 -, 页码 799-807出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.atmosenv.2015.09.066
关键词
Road tunnel study; Traffic emission factor; Light-duty vehicles; Non-methane volatile organic compounds; Nitrogen oxides
资金
- European Commission [LIFE 08 ENV/F/000487 PHOTOPAQ]
Emission factors (EFs) of pollutants emitted by light-duty vehicles (LDV) were investigated in the Leopold II tunnel in Brussels city center (Belgium), in September 2011 and in January 2013, respectively. Two sampling sites were housing the instruments for the measurements of a large range of air pollutants, including non-methane volatile organic compounds (NMVOCs), nitrogen oxides (NOX) and carbon dioxide (CO2). The NMVOCs and NOX traffic EFs for LDV were determined from their correlation with CO2 using a single point analysis method. The emission factor of NOX is (544 +/- 199) mg vehicle(-1) km(-1); NMVOCs emission factors vary from (0.26 +/- 0.09) mg vehicle(-1) km(-1) for cis-but-2-ene to (8.11 +/- 2.71) mg vehicle(-1) km(-1) for toluene. Good agreement is observed between the EFs determined in the Leopold II tunnel and the most recent EFs determined in another European roadway tunnel in 2004, with only a slight decrease of the EFs during the last decade. An historical perspective is provided and the observed trend in the NMVOCs emission factors reflect changes in the car fleet composition, the fuels and/or the engine technology that have occurred within the last three decades in Europe. (C) 2015 Elsevier Ltd. All rights reserved.
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