| Title: | Effects of air pollution control devices on volatile organic compounds reduction in coal-fired power plants |
| Author(s): | Sun S; Liu W; Guan W; Zhu S; Jia J; Wu X; Lei R; Jia T; He Y; |
| Address: | "Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Water Resources and Environment, Chang'an University, Xi'an 710054, China. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: liuwb@rcees.ac.cn. College of Water Resources and Environment, Chang'an University, Xi'an 710054, China. National Research Center for Geoanalysis, Beijing 100037, China. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China" |
| DOI: | 10.1016/j.scitotenv.2021.146828 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "Air pollution control devices (APCDs) have been fitted to many coal-fired power plants to decrease the impacts of pollutants generated during coal combustion. APCDs remove conventional pollutants but also decrease volatile organic compound (VOC) emissions. In this study, flue gas samples were collected from different points in seven typical coal-fired power and two industrial boilers, and the VOC concentrations in the flue gas samples were determined by gas chromatography-mass spectrometry (GC-MS). Selective catalytic reduction (SCR) systems and electrostatic precipitators (ESP) can synergistically remove VOCs, the mean removal rate of VOCs by ESP was 42% +/- 9%. This was caused by the catalyst in SCR systems and the condensation process in the ESP. Wet flue gas desulfurization (WFGD) affected different VOCs in different ways, increasing the halogenated hydrocarbons and aromatic hydrocarbons concentrations but decreasing the oxygenated VOCs concentrations by 12%. Wet electrostatic precipitators (WESP) increased VOC emissions. By calculating Ozone formation potential (OFP), aromatic hydrocarbons are important contributors to ozone production. The emission factor of the power plant was 0.69 g/GJ, and the Chinese annual emission was about 1.2 x 10(4) t. VOCs emissions in different regions were affected by factors such as the economy and population. VOC emissions can be decreased by using the most appropriate unit load and improving the VOC removal efficiencies of the APCDs" |
| Keywords: | Air pollution control devices Coal-fired power plant Emission factor Ozone formation potential VOCs; |
| Notes: | "PubMed-not-MEDLINESun, Shurui Liu, Wenbin Guan, Weisheng Zhu, Shuai Jia, Jing Wu, Xiaolin Lei, Rongrong Jia, Tianqi He, Yunchen eng Netherlands 2021/04/12 Sci Total Environ. 2021 Aug 15; 782:146828. doi: 10.1016/j.scitotenv.2021.146828. Epub 2021 Mar 29" |
