典型的柴油车在稳定和短暂的驾驶条件下排放的可冷凝和可过的颗粒物
Anlin Liu1, Yuanzheng Chen2, Yuankai Shao3
1College of Carbon Neutrality Future Technology, Sichuan University, Chengdu, Sichuan 610065, China; Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China.
Journal of hazardous materials
|September 5, 2024
概括
柴油车排放的可凝结颗粒物 (CPM) 比可过颗粒物 (FPM) 多得多. 驾驶条件极大地影响CPM排放,短暂的驾驶产生比稳定的驾驶更高的水平.
科学领域:
- 环境科学 环境科学
- 大气化学 大气化学
- 汽车工程 汽车工程
背景情况:
- 来自工业来源的颗粒物 (PM) 排放得到了充分的记录.
- 汽车 (特别是柴油) 的可凝结颗粒物 (CPM) 和可过颗粒物 (FPM) 排放仍未得到充分研究.
- 了解车辆特定的PM特性对于空气质量管理至关重要.
研究的目的:
- 调查柴油车辆中CPM和FPM的排放特征.
- 分析不同驾驶条件对CPM和FPM排放的影响.
- 为了确定柴油车辆中CPM和FPM的化学成分.
主要方法:
- 在各种驾驶条件下 (稳定和短暂) 从柴油车辆中采样和分析CPM和FPM.
- 在CPM和FPM中对有机和无机成分的化学表征.
- 排放因子 (EF) 和成分与工业PM排放的比较.
主要成果:
- CPM排放因子是FPMEF的5.410.4倍.
- 短暂的驾驶条件产生了大约2.5倍高的CPMEF比稳定的条件.
- 有机物占CPM和FPM的53.3%92.9%,主要由中间和半挥发性有机化合物组成.
- 阿尔干是占主导地位的有机物种 (42.0%64.0%),类似于工业排放.
- 无机CPM主要是氨 (NH4+) (84.9%87.6%),不同于工业来源主导的硫酸盐 (SO42−) 和 (Cl−).
- 在稳定的驾驶条件下,空气污染控制装置在去除有机CPM方面更有效.
结论:
- 柴油车辆是CPM的重要来源,排放量受到驾驶动态的严重影响.
- 柴油车PM的化学成分,特别是高含量,与工业PM不同.
- 驾驶条件会影响排放控制装置的性能,影响有机和无机CPM的去除/生产.
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