The petrochemical industry emits alkanes, alkenes, benzene rings, and other VOCs, which are hazardous to human health. The two monitoring vehicles for the petrochemical industry are set up for the emission characteristics of The No. 6 Naphtha Cracker Complex, and the monitoring species include criteria pollutants, VOCs, H2S, and NH3.
This project aims to maintain the regular operation of vehicles and equipment dedicated to air quality monitoring for the petrochemical industry. This goal is achieved through routine maintenance and QA/QC to ensure the accuracy of monitoring equipment and data quality. The second goal of this project is to understand the impacts of The No. 6 Naphtha Cracker Complex on regional air quality through data analysis. This information can be incorporated into policymaking strategies at the county level to improve air quality.
Maintenance and quality assurance were performed on monitoring equipment at all levels according to a predetermined schedule. The usability of monthly data from each device was over 80%.
The Ciaotou Elementary School, Xucuo Campus is a long-term monitoring point for the perimeter of The No. 6 Naphtha Cracker Complex. In terms of the criteria pollutant, the levels of O3, 8hr and PM2.5 exceeded the standard at the Ciaotou Elementary School, Xucuo Campus from January through December 2022. And the exceeded days were 54 days and 1 day, respectively. Among the odor pollutants measured at this site, the levels of H2S and NH3 exceeded the olfactory threshold, ratios were 15.1 % and 0.9 %. The results of volatile organic compounds (VOCs) shows that alkanes accounted for 44.1 % of the total, followed by alkenes accounted for 25.1 %. Among the species, the highest level of average concentration was ethylene, at 1.71 ppbv.
In recent years, the problem of odor in Dounan Township has been frequently reported. This year, the EPB instructed to deploy a monitoring vehicle for the petrochemical industry to the Yihe Shengmu Temple and the Dounan Municipal Stadium for monitoring. The two points are monitoring for odor reported.
In terms of the criteria pollutant, the levels of O3, 8hr and PM2.5 exceeded the standard at the Yihe Shengmu Temple from February 26 through May 26 and September 22 through October 6 2022. And the exceeded days were 9 days and 12 days, respectively. Among the odor pollutants measured at this site, the levels of H2S, DMS, Methyl-SH and NH3 exceeded the olfactory threshold. And the highest ratio was H2S, at 48.5 %, followed by NH3 accounted for 11.8 %. The results of VOCs show that alkanes accounted for 48.0 % of the total, followed by aromatics accounted for 33.1 %. Among the species, the highest level of average concentration was toluene, at 3.60 ppbv.
In terms of the criteria pollutant, the levels of O3, 8hr exceeded the standard at the Dounan Municipal Stadium from May 26 through September 22 and Octember 6 through December 31 2022. And the exceeded days were 12 days. Among the odor pollutants measured at this site, the levels of H2S, DMS and NH3 exceeded the olfactory threshold. And the highest ratio was H2S, at 58.6 %, followed by DMS accounted for 10.3 %. The results of VOCs show that aromatics accounted for 47.1 % of the total, followed by alkanes accounted for 37.3 %. Among the species, the highest level of average concentration was toluene, at 5.26 ppbv.
