Establishment Of Air Pollutant Emission Inventory From Industrial Sources And Assessment Of Trend Changes In Henan Province

At present,Henan Province is still facing the regional compound air pollution,and the industrial source is the largest and most complex emission source of SO2,NOx and VOCs among the anthropogenic sources of Henan Province.The establishment of emission inventory and emission trend can effectively identify the emission characteristics and the impact of control measures.Therefore,by establishing the industrial source emission inventory and VOCs component emission of Henan Province from 2009 to 2019,in this study,we identified the emission characteristic and trend change of industrial source,spatial distribution,VOCs species and ozone formation potential(OFP)among 11 years.It hopes to provide key data support for the improvement of regional air quality.First,the emission factor method is used to establish the 2019-based emission inventory of air pollutants from industrial sources in Henan Province.The total emissions of SO2,NOx,CO,PM10,PM2.5.VOCs and NH3 were 405.5,604.4,3387.7,401.6,265.6,420.0 and 16.8 kt,respectively.Industrial boilers and thermal power generation were the main contributors of SO2 and NOx respectively,and the process sources are CO,PM10,PM2.5 and VOCs.The emissions of SO2,NOx and particulate matter in Anyang were the highest in the province.The pollutants with larger emissions in Zhengzhou were NOx and VOCs,and that in Shangqiu were SO2 and NOx,and that in Luoyang were SO2 and VOCs.Second,based on the control measures,the emission trend of industrial source in Henan Province from 2009 to 2019 were identified.Compared to 2009,the change trend of pollutants from industrial sources in 2009 showed that,SO2 decreased by 66.5%,NOx decreased by 37.5%,PM10 decreased by 49.1%and PM2.5 decreased by 26.2%,VOCs increased by 34.6%and NH3 increased by 4.9%.Resident population,per capita GDP,industrialization rate and urbanization rate were the four socioeconomic indicators that have larger correlation with interannual emission changes of various pollutants.Finally,based on the localized industrial VOCs species database,the emission trend of each VOCs species and the corresponding OFP in Henan Province from 2009 to 2019 were estimated.The major three VOCs component with the largest emissions were alkanes(37.3%),aromatic hydrocarbons(24.2%)and oxygenated VOCs(16.6%).The component that contributed the most to OFP were aromatic hydrocarbons(50.8%),olefins(23.9%)and alkanes(14.5%).Based on the trend of VOCs species emission,the component of alkanes,alkynes and aromatic hydrocarbons showed an overall upward trend,while olefins,halogenated hydrocarbons,oxygenated VOCs and other VOCs remain basically unchanged,and halogenated hydrocarbons,oxygenated VOCs and other VOCs decreased slightly;from the perspective of the change trend of OFP,the alkynes,halogenated hydrocarbons and other VOCs was at a lower level year by year,and the oxygenated VOCs decreased year by year,while the OFP of aromatic hydrocarbons and olefins occupies a large proportion every year.