| Title: | Emission characteristics and ozone formation potentials of VOCs from ultra-low-emission waterborne automotive painting |
| Author(s): | Ou R; Chang C; Zeng Y; Zhang X; Fu M; Fan L; Chen P; Ye D; |
| Address: | "Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, School of Environment and Energy, South China University of Technology, 510006, Guangzhou, China; GAC Honda Automobile Co., Ltd, Guangzhou, 510700, PR China. GAC Honda Automobile Co., Ltd, Guangzhou, 510700, PR China. Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, School of Environment and Energy, South China University of Technology, 510006, Guangzhou, China. Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, School of Environment and Energy, South China University of Technology, 510006, Guangzhou, China. Electronic address: chenpr@scut.edu.cn" |
| DOI: | 10.1016/j.chemosphere.2022.135469 |
| ISSN/ISBN: | 1879-1298 (Electronic) 0045-6535 (Linking) |
| Abstract: | "Automotive painting plants are important emission sources of volatile organic compounds (VOCs) that contribute significantly to ground-level ozone (O(3)) pollution in atmosphere. Here, we investigated process-specified emission characteristics of VOCs, without or with advanced adsorption/incineration after-treatments, from an ultra-low-emission (ULE) waterborne painting process in a modernized automotive plant. Overall, more than 80 VOCs species were identified and sorted into seven main categories. In the stack emissions without after-treatments, oxygenated VOCs (alcohols, esters, ketones, ethers, etc.) were found to be the most abundant components (48.8%), followed by aromatic (30.9%), alkanes (16.9%) and alkenes (1.2%). Among the different VOCs species discharged to atmosphere (i.e. after adsorption/incineration after-treatments), aromatics demonstrated a predominant contribution (by 60.6%) to the total O(3) formation potentials (OFPs) despite their relatively lower abundance. Trimethylbenzene was identified to have the highest OFPs, and thus should be controlled with peculiar priority. As compared to traditional organic solvent-based painting process, the ULE waterborne process implemented in the target plant allows to reduce the OFPs from 10.7 mg m(-3) to 3 mg m(-3) (or by 72%). Additional monitoring by unmanned aerial vehicle (over more than 3000 sampling points in the plant) confirmed that the instantaneous concentrations of fugitive VOCs were well below the regulated limit value during typical working and non-working days. These findings may provide important reference for reduction of VOCs emissions and O(3) pollution from automotive painting processes" |
| Keywords: | *Air Pollutants/analysis Atmosphere China Environmental Monitoring *Ozone/analysis *Volatile Organic Compounds/analysis Aromatics Automobile manufacturing Oxygenated VOCs Trimethylbenzene Ultra-low-emission Unmanned aerial vehicle; |
| Notes: | "MedlineOu, Runhua Chang, Chun Zeng, Yicong Zhang, Xiong Fu, Mingli Fan, Liya Chen, Peirong Ye, Daiqi eng England 2022/06/27 Chemosphere. 2022 Oct; 305:135469. doi: 10.1016/j.chemosphere.2022.135469. Epub 2022 Jun 24" |
