Study On Characteristics Of Typical Pollutants Emissions From Vehicle Exhausts In Harbin

With the frequently occurrence of heavy haze and sharply surging of vehicle ownership, vehicle emissions has become an important source of haze pollution. Harbin, as a typical city of in Northeast China, was chosen for this study. It is important to explore the emission characteristics and the establishment of high-resolution emission inventories, evaluate the effectiveness of different abatement scenarios. Based on the condition, it can not only provide a scientific basis for the development of targeted emission control strategies, but also lay the foundation for the deep study of on-road motor vehicle pollutants emissions in Northeast China.In this study, the activity database was established through the investigation and emission factors of different types of vehicles between winter and summer were calculated using the IVE(International Vehicle Emissions) model. Several representative diesel trucks were selected for the on-road emission test, which can corrcet the particulate matter(PM) emission factors that are adapted to actual emissions of this city. PM emission factors were bigger than that in summer. The PM emission factors from HDDT were far bigger than that from LDDT. Compared to EUⅢ emission standards, the PM emission factors with EUⅡ emission standard were bigger. PM emission factors increased with the increasing of speed. PM2.5 emission factors were significantly larger than the PM1.0. Compared with domestic cities, the PM emissions of light-duty diesel trucks are little difference, while the PM emissions levels of heavy-duty diesel trucks are higher in Harbin. Compared with foreign cities, the PM emissons from diesel trucks are higher in China.The vehicle emission inventory was established in Harbin in 2014. The emissions of CO, VOC, NOx and PM2.5 were 8.10×104, 1.01×104, 13.13×104 and 2.84×104 tons. The emissions in winter were bigger than that in summer. Compared with the other cities in China, the emissions of CO and VOC were less, however, the NOx and PM2.5 emissions were bigger in Harbin. The rate of emissions increase of CO, VOC, NOx and PM2.5 were 55%, 45%, 40% and 37% under BAU scenario in 2020 in Harbin. HSR was the best scenario to reduce the emissions of CO, VOC, NOx and PM for the reduction rate of 41%, 44%, 47% and 46% respectively. Therefore, enhancing the stringent vehicle emission standards and improving fuel quality were the most direct strategy to control vehicle emissions.The heavy-duty trucks contributed most of the total NOx and PM2.5 emissions. The vehicle running process made significant contribution to the total emission s. The emissions of NOx and PM2.5 in non-urban area were bigger than that in urban area. Based on the information of on-road network and traffic volume, the grid-based emission inventory was established. It is indicated that emissions are concentrated on the main urban area of Harbin. The districts of Xiangfang, Nangang and Daoli were the most polluted area. The pollution of the other districts were relatively disperse d but emissions were still high in the central region of their respective area. The emissions laws of spatial distribution coincide with the characteristics of road density in Harbin.