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使用多组分气溶形成模型 (MAFOR) 确定船舶的改善VOC排放因子

Lea Fink¹, Matthias Karl¹, Volker Matthias¹

¹Helmholtz-Zentrum Hereon, Department of Coastal Environmental Chemistry, 21052 Geesthacht, Germany.

|June 26, 2024

概括

国际航运排放对空气质量产生重大影响. 调整船舶挥发性有机化合物 (VOC) 排放因子,特别是低挥发性化合物,可以改善空气质量模型,并揭示潜在的PM2.5变化.

科学领域:

大气化学大气化学
环境科学环境科学
海洋污染海洋污染

背景情况:

国际航运对全球人为排放,包括颗粒物 (PM) 的排放做出了重大贡献.
船舶的挥发性有机化合物 (VOC) 排放是二次细颗粒物 (PM2.5) 形成的关键前体.
了解VOC排放因子 (EF) 对PM2.5的影响对于空气质量评估至关重要.

研究的目的:

调查船舶发动机各种挥发性化合物排放因子对船舶排气中二次PM2.5形成的影响.
通过调整VOC EF来完善气溶盒模型,使其与观察到的粒子数量和大小分布相匹配.
通过化学运输模型 (CTM) 评估调整后的VOC船舶排放对地中海PM2.5度的区域影响.

主要方法:

利用气溶盒模型进行船只排气的近羽毛尺度模拟.
调整了VOC排放因子,重点关注中等,低,极低挥发性的化合物.
集成的近羽毛模型产生了一个区域规模的化学运输模型 (CTM).

主要成果:

测量和建模的粒子数量大小分布之间的一致性随着调整的VOC EFs显著改善.
该研究发现,与文献价值相比,VOC EF需要缩放3.6倍.
区域CTM模拟显示,在夏季主要航线和港口城市附近的PM2.5度变化高达5%.

结论:

调整VOC排放因子,特别是低挥发性化合物,对于准确建模船舶排放的二次PM2.5至关重要.
虽然区域影响可以明显 (高达5%),但VOC EF变化对PM2.5的整体影响是通过在较大的CTM电网细胞中快速稀释来缓解的.
这项研究强调了准确的VOC排放数据对船舶污染及其对大气颗粒物的贡献的重要性.

关键词:

挥发性有机化合物排放因子喷雾剂盒模型模型船舶排放的排放量船舶的排放量

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