State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China; Department of Environmental and Safety Engineering, College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China.
State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
Sci Total Environ. 2020 Nov 1;741:140326. doi: 10.1016/j.scitotenv.2020.140326. Epub 2020 Jun 20.
China is the largest coal producer and consumer in the world, and coal-fired power plants are among its major sources of air pollutants. The Chinese government has implemented various stringent measures to reduce air pollutant emissions over the past two decades. National statistical data, emission inventories, and satellite observations indicate that air pollutant emissions from coal-fired power plants have been effectively controlled. Field measurements at coal-fired power plants can provide valuable information about the long-term trend of air pollutant emissions and the driving factors. In this study, we evaluated air pollutant emissions from 401 units at 308 coal-fired power plants. An appreciable reduction in air pollutant concentrations and emission factors from coal-fired power plants in China is observed over the past two decades. The drivers for this trend from the perspective of policy making, application of removal technologies, tightening of emission standards, technological improvement, monitoring systems, and economic measures are discussed. Currently, concentrations of typical air pollutants from coal-fired power plants in China are lower than those in Japan, Germany, and the US. This can be attributed to the policies and lenient emission standards for power plants in these countries. The technological improvement of air pollution control devices is the key factor that has led to reductions in air pollutant emissions in China. China has built the largest system of clean coal-fired power plants in the world.
中国是世界上最大的煤炭生产国和消费国，燃煤电厂是其主要空气污染物排放源之一。在过去的二十年中，中国政府实施了各种严格的措施来减少空气污染物排放。国家统计数据、排放清单和卫星观测表明，燃煤电厂的空气污染物排放已得到有效控制。燃煤电厂的现场测量可以提供有关空气污染物排放的长期趋势和驱动因素的有价值信息。在这项研究中，我们评估了 308 家燃煤电厂的 401 个机组的空气污染物排放。过去二十年中，中国燃煤电厂的空气污染物浓度和排放因子明显下降。从政策制定、去除技术应用、排放标准收紧、技术改进、监测系统和经济措施的角度讨论了这一趋势的驱动因素。目前，中国燃煤电厂的典型空气污染物浓度低于日本、德国和美国。这可归因于这些国家的电厂政策和宽松的排放标准。空气污染控制设备的技术改进是导致中国空气污染物排放量减少的关键因素。中国已经建成了世界上最大的清洁燃煤电厂系统。
