Emission characteristics and ozone formation potentials of VOCs from gasoline passenger cars at different driving modes

Vehicle emissions have adverse health effects and are major source of ozone precursors in urban environments. In this study, the emission factors (EFs) of nitrogen oxides (NOx) and eight high abundant volatile organic compounds (VOCs) including propene, 1,3-butadiene, 1-butene, benzene, 1-hexene, toluene, xylene, and trimethylbenzene from gasoline-fuel passenger cars were investigated at four typical driving modes using a chassis dynamometer method combined with the online ion molecule reaction mass spectrometer (IMR-MS), and ozone formation potentials (OFPs) of VOCs were further evaluated. Measured concentrations of NOx and VOCs markedly varied with vehicles and driving speeds. Change trends of NOx EFs and VOC EFs were opposite with varying driving speeds. The EFs of NOx had wide inter-vehicle variations and increased with driving speeds. The EFs of individual VOCs were markedly different at same driving mode and notably varied with driving modes, and the average EF of total VOCs at low speed mode (30 km/h) was the largest among the driving modes. The OFPs of individual VOC varied with different vehicles, different VOC species and driving modes, and the driving mode of 30 km/h had the largest total OFPs among the driving modes. The findings obtained in this study can provide valuable insight into to mitigating air pollution caused by vehicles in urban areas.


Ayoko, G., Singh, A., Lim, M., Ristosvski, Z., Jayaratne, E., Morawska, L., King, G., Christensen, E., 2014. Characterization of VOCs from LPG and unleaded petroleum fuelled passenger cars. Fuel 115, 636–643.

Butler, T.J., Vermeylen, F.M., Rury, M., Likens, G.E., Lee, B., Bowker, G.E., McCluney, L., 2011. Response of ozone and nitrate to stationary source NOx emission reductions in the eastern USA. Atmos. Environ. 45 (5), 1084–1094.

Cai, C., Geng, F., Tie, X., Yu, Q., An, J., 2010. Characteristics and source apportionment of VOCs measured in Shanghai, China. Atmos. Environ. 44 (38), 5005–5014.

Caplain, I., Cazier, F., Nouali, H., Mercier, A., Déchaux, J.-C., Nollet, V., Joumard, R., André, J.-M., Vidon, R., 2006. Emissions of unregulated pollutants from European gasoline and diesel passenger cars. Atmos. Environ. 40 (31), 5954–5966.

Carter, W.L., 1995. Computer modeling of environmental chamber measurements of maximum incremental reactivities of volatile organic compounds. Atmos. Environ. 29 (18), 2513–2527.

Carter, W.P.L., 2012. Development of ozone reactivity scales for volatile organic compounds. J. Air Waste Manag. 44 (7), 881–899.

Cheung, C., Zhu, L., Huang, Z., 2009. Regulated and unregulated emissions from a diesel engine fueled with biodiesel and biodiesel blended with methanol. Atmos. Environ. 43 (32), 4865–4872.

Chiang, H.-L., Huang, P.-H., Lai, Y.-M., Lee, T.-Y., 2014. Comparison of the regulated air pollutant emission characteristics of real-world driving cycle and ECE cycle for motorcycles. Atmos. Environ. 87, 1–9.

Colberg, C.A., Tona, B., Catone, G., Sangiorgio, C., Stahel, W.A., Sturm, P., Staehelin, J., 2005. Statistical analysis of the vehicle pollutant emissions derived from several European road tunnel studies. Atmos. Environ. 39 (13), 2499–2511.

Costagliola, M.A., Murena, F., Prati, M.V., 2014. Exhaust emissions of volatile organic compounds of powered two-wheelers: effect of cold start and vehicle speed. Contribution to greenhouse effect and tropospheric ozone formation. Sci. Total Environ. 468, 1043–1049.

Defoort, F., Thiery, S., Ravel, S., 2014. A promising new on-line method of tar quantification by mass spectrometry during steam gasification of biomass. Biomass Bioenerg. 65, 64–71.

Guo, H., Zou, S.C., Tsai, W.Y., Chan, L.Y., Blake, D.R., 2011. Emission characteristics of nonmethane hydrocarbons from private cars and taxis at different driving speeds in Hong Kong. Atmos. Environ. 45 (16), 2711–2721.

He, Q., Yan, Y., Li, H., Zhang, Y., Chen, L., Wang, Y., 2015. Characteristics and reactivity of volatile organic compounds from non-coal emission sources in China. Atmos. Environ. 115, 153–162.

Ho, K., Lee, S., Ho, W., Blake, D., Cheng, Y., Li, Y., Ho, S.S.H., Fung, K., Louie, P., Park, D., 2009. Vehicular emission of volatile organic compounds (VOCs) from a tunnel study in Hong Kong. Atmos. Chem. Phys. 9 (19), 7491–7504.

Hung-Lung, C., Ching-Shyung, H., Shih-Yu, C., Ming-Ching, W., Sen-Yi, M., Yao-Sheng, H., 2007. Emission factors and characteristics of criteria pollutants and volatile organic compounds (VOCs) in a freeway tunnel study. Sci. Total Environ. 381 (1), 200–211.

Hwa, M.-Y., Hsieh, C.-C., Wu, T.-C., Chang, L.-F.W., 2002. Real-world vehicle emissions and VOCs profile in the Taipei tunnel located at Taiwan Taipei area. Atmos. Environ. 36 (12), 1993–2002.

Kawashima, H., Minami, S., Hanai, Y., Fushimi, A., 2006. Volatile organic compound emission factors from roadside measurements. Atmos. Environ. 40 (13), 2301–2312.

Leong, S.T., Muttamara, S., Laortanakul, P., 2002. Applicability of gasoline containing ethanol as Thailand's alternative fuel to curb toxic VOC pollutants from automobile emission. Atmos. Environ. 36 (21), 3495–3503.

Leong, Y.J., Rutter, A.P., Wong, H.Y., Gutierrez, C.V., Junaid, M., Scheuer, E., Gong, L., Lewicki, R., Dibb, J.E., Tittel, F.K., Griffin, R.J., 2016. Impact of environmental variables on the reduction of nitric acid by proxies for volatile organic compounds emitted by motor vehicles. Atmos. Pollut. Res. 7 (2), 221–227.

Li, L., Ge, Y., Wang, M., Peng, Z., Song, Y., Zhang, L., Yuan, W., 2015. Exhaust and evaporative emissions from motorcycles fueled with ethanol gasoline blends. Sci. Total Environ. 502, 627–631.

Lopes, M., Serrano, L., Ribeiro, I., Cascão, P., Pires, N., Rafael, S., Tarelho, L., Monteiro, A., Nunes, T., Evtyugina, M., 2014. Emissions characterization from EURO 5 diesel/ biodiesel passenger car operating under the new European driving cycle. Atmos. Environ. 84, 339–348.

Martins, L.D., Andrade, M.F., Freitas, E.D., Pretto, A., Gatti, L.V., Albuquerque, É.L., Tomaz, E., Guardani, M.L., Martins, M.H., Junior, O.M., 2006. Emission factors for gas-powered vehicles traveling through road tunnels in São Paulo. Brazil. Environ. Sci. Technol. 40 (21), 6722–6729.

Na, K., 2006. Determination of VOC source signature of vehicle exhaust in a traffic tunnel. J. Environ. Manag. 81 (4), 392–398.

Ning, Z., Wubulihairen, M., Yang, F., 2012. PM, NOx and butane emissions from on-road vehicle fleets in Hong Kong and their implications on emission control policy. Atmos. Environ. 61, 265–274.

Saxer, C.J., Forss, A.-M., Rüdy, C., Heeb, N.V., 2006. Benzene, toluene and C2-benzene emissions of 4-stroke motorbikes: benefits and risks of the current TWC technology. Atmos. Environ. 40 (31), 6053–6065.

Schifter, I., Diaz, L., Lopez-Salinas, E., 2007. Ozone-forming potential and fuel formulation from mobile sources in Mexico. Fuel 86 (5), 858–866.

Schmitz, T., Hassel, D., Weber, F.-J., 2000. Determination of VOC-components in the exhaust of gasoline and diesel passenger cars. Atmos. Environ. 34 (27), 4639–4647.

Shin, H., Roh, S., Kim, J., Lee, S., Kim, Y., 2013. Temporal variation of volatile organic compounds and their major emission sources in Seoul, Korea. Environ. Sci. Pollut. Res. 20 (12), 8717–8728.

Soltic, P., Weilenmann, M., 2003. NO2/NO emissions of gasoline passenger cars and lightduty trucks with Euro-2 emission standard. Atmos. Environ. 37 (37), 5207–5216.

Stemmler, K., Bugmann, S., Buchmann, B., Reimann, S., Staehelin, J., 2005. Large decrease of VOC emissions of Switzerland's car fleet during the past decade: results from a highway tunnel study. Atmos. Environ. 39 (6), 1009–1018.

Suarez-Bertoa, R., Zardini, A., Platt, S., Hellebust, S., Pieber, S., El Haddad, I., TemimeRoussel, B., Baltensperger, U., Marchand, N., Prévôt, A., 2015. Primary emissions and secondary organic aerosol formation from the exhaust of a flex-fuel (ethanol) vehicle. Atmos. Environ. 117, 200–211.

Tsai, J.-H., Chang, S.-Y., Chiang, H.-L., 2012. Volatile organic compounds from the exhaust of light-duty diesel vehicles. Atmos. Environ. 61, 499–506.

Tsai, J.-H., Chiang, H.-L., Hsu, Y.-C., Weng, H.-C., Yang, C.-Y., 2003. The speciation of volatile organic compounds (VOCs) from motorcycle engine exhaust at different driving modes. Atmos. Environ. 37 (18), 2485–2496.

Tsai, J.-H., Hsu, Y.-C., Weng, H.-C., Lin, W.-Y., Jeng, F.-T., 2000. Air pollutant emission factors from new and in-use motorcycles. Atmos. Environ. 34 (28), 4747–4754.

Tsai, J.-H., Huang, P.-H., Chiang, H.-L., 2014. Characteristics of volatile organic compounds from motorcycle exhaust emission during real-world driving. Atmos. Environ. 99, 215–226.

Wang, J., Jin, L., Gao, J., Shi, J., Zhao, Y., Liu, S., Jin, T., Bai, Z., Wu, C.-Y., 2013a. Investigation of speciated VOC in gasoline vehicular exhaust under ECE and EUDC test cycles. Sci. Total Environ. 445, 110–116.

Wang, X., Yin, H., Ge, Y., Yu, L., Xu, Z., Yu, C., Shi, X., Liu, H., 2013b. On-vehicle emission measurement of a light-duty diesel van at various speeds at high altitude. Atmos. Environ. 81, 263–269.

Wu, X., Wu, Y., Zhang, S., Liu, H., Fu, L., Hao, J., 2016. Assessment of vehicle emission programs in China during 1998–2013: achievement, challenges and implications. Environ. Pollut. 214, 556–567.

Yang, H.-H., Chien, S.-M., Cheng, M.-T., Peng, C.-Y., 2007. Comparative study of regulated and unregulated air pollutant emissions before and after conversion of automobiles from gasoline power to liquefied petroleum gas/gasoline dual-fuel retrofits. Environ. Sci. Technol. 41 (24), 8471–8476. http://dx.doi.org/10.1021/es0706495.

Yao, Z., Wu, B., Shen, X., Cao, X., Jiang, X., Ye, Y., He, K., 2015. On-road emission characteristics of VOCs from rural vehicles and their ozone formation potential in Beijing, China. Atmos. Environ. 105, 91–96.

Zavala, M., Herndon, S., Slott, R., Dunlea, E., Marr, L., Shorter, J., Zahniser, M., Knighton, W., Rogers, T., Kolb, C., 2006. Characterization of on-road vehicle emissions in the Mexico City Metropolitan Area using a mobile laboratory in chase and fleet average measurement modes during the MCMA-2003 field campaign. Atmos. Chem. Phys. 6 (12), 5129–5142.

Zhang, Y., Wang, X., Li, G., Yang, W., Huang, Z., Zhang, Z., Huang, X., Deng, W., Liu, T., Huang, Z., 2015. Emission factors of fine particles, carbonaceous aerosols and traces gases from road vehicles: recent tests in an urban tunnel in the Pearl River Delta, China. Atmos. Environ. 122, 876–884.

Zhang, Z., Cheung, C., Chan, T., Yao, C., 2010. Experimental investigation on regulated and unregulated emissions of a diesel/methanol compound combustion engine with and without diesel oxidation catalyst. Sci. Total Environ. 408 (4), 865–872.

Zhao, H., Ge, Y., Tan, J., Yin, H., Guo, J., Zhao, W., Dai, P., 2011. Effects of different mixing ratios on emissions from passenger cars fueled with methanol/gasoline blends. J. Environ. Sci. 23 (11), 1831–1838.

Zhu, L., Cheung, C.S., Zhang, W., Fang, J., Huang, Z., 2013. Effects of ethanol–biodiesel blends and diesel oxidation catalyst (DOC) on particulate and unregulated emissions. Fuel 113, 690–696.

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