Non-criteria air pollutants, namely, sulfur trioxide (SO₃) and condensable particulate matter (CPM), are attracted more attention due to the non-negligible emission. In this work, the migration and emission characteristics of SO₃ and CPM were investigated in two typical coal-fired power plants using the isopropanol absorption method and the dry impinger method, respectively. One of the power plants was equipped with two-stage wet flue gas desulfurization (WFGD) and the other one was self-generation power plant using Zhundong coal equipped with one-stage WFGD. The mass concentrations of SO₃ and CPM were measured at the inlet and outlet of the air pollution control devices. To further understand the removal characteristics, the chemical compositions in organic and inorganic fractions of CPM were analyzed. Based on the measurement data, the emission factors of CPM and SO₃ were calculated. The final emissions of SO₃ range from 2.16 to 2.29 mg•Nm⁻³ and the emission factor is 0.024–0.040 kg/(t of coal). The stack emissions of filterable particulate matter all meet the ultra-low emission standard and are less than 5 mg•Nm⁻³. However, CPM emissions all exceed 10 mg•Nm⁻³ and account for more than 85% in total particulate matter. CPM concentrations are notable and the emissions should not be ignored. In both power plants, WFGD and wet electrostatic precipitator can reduce the emission of organic fraction in CPM; while one-stage WFGD has negative effect on the mitigation of inorganic fraction in CPM with the concentrations of water-soluble ions NH₄⁺, SO₄^2- and Cl⁻ increasing by 41.37%, 52.22% and 91.73%, respectively.

非标准的空气污染物，即三氧化硫（SO ₃）和可冷凝的颗粒物（CPM），由于其排放量微不足道而引起了更多关注。在这项工作中，分别使用异丙醇吸收法和干撞击器法研究了两个典型燃煤电厂中SO ₃和CPM的迁移和排放特征。其中一座电厂配备了两级湿法烟气脱硫（WFGD），另一座电厂则是使用准东煤电厂的自发电电厂，该装置配备了一级WFGD。SO ₃的质量浓度和CPM是在空气污染控制装置的入口和出口进行测量的。为了进一步了解去除特性，分析了CPM有机和无机级分中的化学成分。根据测量数据，计算出CPM和SO ₃的排放因子。SO ₃的最终排放量为2.16至2.29 mg•Nm ^-3，排放因子为0.024-0.040 kg /（吨煤）。可过滤颗粒物的烟囱排放均符合超低排放标准，且小于5 mg•Nm ^-3。但是，CPM排放均超过10 mg•Nm ^-3占颗粒物总量的85％以上。CPM浓度显着，排放不容忽视。在这两个电厂中，WFGD和湿式静电除尘器都可以减少CPM中有机物的排放。而单级WFGD对无机部分的缓解在CPM用水溶性离子NH浓度负面影响₄ ⁺，SO ₄ ^2-和Cl ^-通过分别41.37％，52.22％和91.73％，增加了。