Characterization of Particle and Gaseous Emissions from Marine Diesel Engines with Different Fuels and Impact of After-Treatment Technology
Characterization of Particle and Gaseous Emissions from Marine Diesel Engines with Different Fuels and Impact of After-Treatment Technology
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不同燃料船用柴油机颗粒和气体排放的特征及后处理技术的影响
DOI：
10.3390/en10081110
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发表时间：
2017
期刊：
影响因子：
3.2
通讯作者：
Zhu Yuanqing
中科院分区：
文献类型：
--
作者：
Zhou Jinxi;Zhou Song;Zhu Yuanqing
国际海事组织（IMO）海洋环境保护委员会（MEPC）和一些国家逐步加强了对船舶废气排放的法律管制。本文的目的是评估后处理技术废气净化（EGC）系统对船用柴油机排放的影响，以及与使用低硫燃油相比的成本优势。介绍了低速二冲程船用柴油机高硫油和低硫油产生的SO2和颗粒物（PM）的排放特性。对烟气中SO2的去除率进行了测试，并对PM的去除率进行了预测。当使用高硫油时，SO2和PM的排放因子分别为8.73 g/kWh至11.6 g/kWh和2.0 g/kWh至2.7 g/kWh。这些值明显高于使用低硫油的排放值。燃料硫含量是影响SO2和PM排放因子的关键因素。燃料的改变可以降低颗粒物的质量排放因子，两种燃料下颗粒物的质量排放因子占总排放因子的90%以上。采用EGC系统时，脱硫效率可达99%以上。在25、39、53和67%负载下的pH值也分别稳定在7.5、7.6、7.7和8左右。EGC系统还可以捕获由SO2形成的部分初级PM和次级PM。EGC系统对粒径大于1 μm的颗粒物更有效。因此，根据本研究，低硫油和EGC的使用除了满足未来船舶排放法规外，还将大大减少船舶废气中目前未受管制的有害化学物质的排放。此外，与使用低硫燃料油相比，EGC系统还具有显著的成本优势。
The International Maritime Organization (IMO) Marine Environment Protection Committee (MEPC) and some countries have gradually strengthened the laws regulating ship exhaust emissions. The aim of this paper is to estimate the impact of an after-treatment technology exhaust gas cleaning (EGC) system on marine diesel engine emissions and the cost advantage compared to using low-sulfur fuel oil. The emission characteristics of SO2 and particulate matter (PM) produced from high sulfur oil and low sulfur oil in a low-speed two-stroke marine diesel engine were also presented. The removal efficiency of SO2 has been tested and the PM removal efficiency was also predicted in this study. When using high sulfur oil, the emission factor of SO2 and PM were from 8.73 g/kWh to 11.6 g/kWh and 2.0 g/kWh to 2.7 g/kWh, respectively. These values are significantly higher than the emission values from using low sulfur oil. The fuel sulfur content (FSC) was the key factor affecting the emission factors of SO2 and PM. The fuel change could reduce the mass emission factor of PM, which is above 90% for the total particle emission with the two fuels. When using the EGC system, the desulfurization efficiencies were above 99%. The pH values at a 25, 39, 53, and 67% load were also stabilized to be around 7.5, 7.6, 7.7, and 8, respectively. The EGC system can also capture part of the primary PM and secondary PM formed from SO2. The EGC system was more effective for PM of the size larger than 1 μm. Thus, according to this study, the usage of low sulfur oil and EGC will also substantially decrease the emission of currently unregulated hazardous chemical species in the exhaust gas of ships in addition to satisfying future emissions regulations of ship. Furthermore, the EGC system also had a significant cost advantage compared to using low-sulfur fuel oil.