Study on emission inventory of non-methane volatile organic compounds for chemical industry in Nanjing

• 1、State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjjing 210023

Abstract：An emission inventory of non-methane volatile organic compounds (NMVOC) for chemical industry in Nanjing was developed, based on detailed enterprise information from plant-by-plant onsite survey. The NMVOC emissions were estimated at 112 Giga grams (Gg) for chemical industry in Nanjing, 2011. Oil refinery, basic chemical material manufacturing, synthetic chemical industry, fine chemical industry, coke making and other chemical industry contributed 51.5%, 13.3%, 12.0%, 11.4%, 8.0%, and 3.8%, respectively. The total NMVOC emissions were speciated into 139 individual species, in which the alkenes contributed more than 58% to the total ozone formation potential (OFP). Besides, the NMVOC emissions from chemical industry for the same city and year were also calculated based on statistical data, and were then compared with results from the plant-based method. It was found that the NMVOC emissions based on statistical data were underestimated by 18.8% because of the omission of some emission sources in basic chemical material manufacturing and synthetic chemical industry. Besides, the spatial allocation of emissions according to population density failed to capture the emissions from the key emission sources. The comparisons between the two inventories demonstrated the importance of conducting detailed survey on improvement of emission inventory at city scale.

Keywords： volatile organic compounds emission inventory chemical industry enterprise information from onsite survey Nanjing?