[Inventory and Distribution Characteristics of China's Thermal Power Emissions Under Ultra-Low Reconstruction].

Abstract

This study updates a bottom-up high-resolution emission inventory and estimates the concentrations, emission factors, emissions, and performance values of China's power plants, based on the data from continuous emission monitoring systems and environmental statistics in 2018. The results show that the ultra-low emission policy has significant effects: the average concentrations of SO₂, NO_<i>x</i>, and PM in thermal power plants were 37.57, 56.71, and 7.41 mg ·m^-3, respectively in 2018, which were 58.71%, 43.12%, and 60.79% lower than those in 2015. The average emission factors of SO₂, NO_<i>x</i>, and PM from coal-fired units in China were 0.3, 0.48, and 0.06 g ·kg^-1, respectively, which were 55.2%, 36.84%, and 62.5% lower than those in 2015. The total emissions of SO₂, NO_<i>x</i>, PM, and PM_2.5in thermal power plants were 721.4, 1183.8, 149.0, and 135.9 kt ·a^-1, respectively, down by 41.32%, 19.29%, 48.12%, and 40.39% from 2015.