Carbonyl emissions from heavy-duty diesel vehicle exhaust in China and the contribution to ozone formation potential

• Published in: Journal of environmental sciences (China) Vol. 26; no. 1; pp. 122 - 128
• Main Authors: Dong, Dong, Shao, Min, Li, Yue, Lu, Sihua, Wang, Yanjun, Ji, Zhe, Tang, Dagang
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 2014
• Subjects: Air Pollutants - analysis; Air Pollutants - chemical synthesis; Air Pollutants - standards; Aldehydes - analysis; carbonyl; Carbonyls; chassis dynamometer; China; Diesel; Diesel fuels; diesel vehicle; Emission; Emission analysis; Exhaust; Ketones - analysis; Ozone - chemical synthesis; ozone formation potential; Vehicle Emissions - analysis; Vehicles; 中国; 平均排放因子; 柴油车辆; 汽车尾气; 羰基化合物; 臭氧; 重型; 高效液相色谱法; China; China, People's Rep; carbonyl; diesel vehicle; ozone formation potential; chassis dynamometer
• ISSN: 1001-0742; 1878-7320
• DOI: 10.1016/S1001-0742(13)60387-3

Fifteen heavy-duty diesel vehicles were tested on chassis dynamometer by using typical heavy duty driving cycle and fuel economy cycle. The air from the exhaust was sampled by 2,4- dinitrophenyhydrazine cartridge and 23 carbonyl compounds were analyzed by high performance liquid chromatography. The average emission factor of carbonyls was 97.2 mg/km, higher than that of light-duty diesel vehicles and gasoline-powered vehicles. Formaldehyde, acetaldehyde, acetone and propionaidehyde were the species with the highest emission factors. Main influencing factors for carbonyl emissions were vehicle type, average speed and regulated emission standard, and the impact of vehicle loading was not evident in this study. National emission of carbonyls from diesel vehicles exhaust was calculated for China, 2011, based on both vehicle miles traveled and fuel consumption. Carbonyl emission of diesel vehicle was estimated to be 45.8 Gg, and was comparable to gasolinepowered vehicles （58.4 Gg）. The emissions of formaldehyde, acetaldehyde and acetone were 12.6, 6.9, 3.8 Gg, respectively. The ozone formation potential of carbonyls from diesel vehicles exhaust was 537 mg O3/km, higher than 497 mg O3/km of none-methane hydrocarbons emitted from diesel vehicles.