Vehicle emission inventory and economic benefits of emission reduction in Tangshan
WANG Ji-guang1,2,3, GUI Hua-qiao1,2, CHEN Jin-chao4, WANG Zhi-wei5, SUN Shi-da6, YANG Zhi-wen3, ZHANG Xiao-wen3, MAO Hong-jun6
1. Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China; 2. University of Science and Technology of China, Hefei 230026, China; 3. China Automotive Technology & Research Center Co. Ltd, Tianjin 300300, China; 4. College of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China; 5. Tangshan Environmental Monitoring Center, Tangshan 063015, China; 6. College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
Abstract:Based on the vehicle regular environmental inspection test data, the local average mileage of different vehicle types was obtained, and the "mileage-registration year" characteristic curve of typical vehicles in Tangshan was established. The actual road emission factors of typical China VI vehicles was obtained by PEMS. According to localized correction of vehicle emission factors by COPERT, the Tangshan vehicle emission inventory covering different emission stages and fuel power types was developed. Combining with the road network information of Tangshan, 3km×3km high spatial and temporal resolution grid vehicle emission inventory based on ArcGIS was developed. On this basis, emission reduction and input cost-effectiveness under different ratios scenarios of China Ⅲ and below heavy diesel vehicles (referred to as high emission vehicles) elimination and DPF retrofit were analyzed. The results show that the CO, HC, NOx, PM2.5 and PM10 annual emissions in 2020 were 92403.51, 10034.53, 70568.35, 2036.51 and 2160.65 tons respectively, which NOx, PM2.5 and PM10 were mainly from diesel vehicles, accounting for 92%, 89% and 89% respectively; CO and HC emissions were mainly from gasoline vehicles, accounting for 71% and 73% respectively. After the implementation of diesel truck restriction zone policy for China IV and below emission standard in the Second Ring Road, the annual CO and HC emission reduction rates in the Second Ring Road were 22.41% and 21.68%, while the emission intensity of NOx, PM10 and PM2.5 pollutants had been significantly reduced, and the annual emissions reduction rates were 78.60%, 84.85% and 84.79%, respectively. Under the scenario of elimination and treatment of high emission vehicles, with the increase of high emission elimination ratio, the input cost and annual NOx emission reduction showed a linear upward trend, and the NOx emission reduction effect was more significant, while the PM emission reduction vehicles showed a slight downward trend. For every 10% increase in the elimination rate of high emission vehicles, the annual NOx emission reduction increased by 892.41 tons, the annual PM emission reduction decreases by 7.56 tons, and the annual input cost increased by 113 million RMB.
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