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| 机动车掺氢后排放特征研究 |
| Research on the Emission Characteristics of Motor Vehicles after Hydrogen Blending |
| 投稿时间：2025-04-19 修订日期：2025-04-30 |
| DOI： |
| 中文关键词: 机动车加氢 排放特征 挥发性有机物(VOCs) |
| 英文关键词:Hydrogen Blending in Motor Vehicles Emission Characteristics Volatile Organic Compounds |
| 基金项目:湖南省环保科研项目(HBKYXM-2023037) |
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| 中文摘要: |
| 本研究通过车载测试系统与台架试验,系统探究了掺氢对轻型汽油车(LDGV)与柴油车(LDDT、HDDT)常规气态污染物(CO、HC、NOx)及挥发性有机物(VOCs)的排放影响。实验选取国IV和国V排放标准的7辆实验车辆(3辆汽油车、3辆轻型柴油车、1辆重型柴油车),采用便携式排放测试系统实时监测尾气污染物浓度,并利用气相色谱-质谱联用仪(GC-MS)分析VOCs组分。结果表明:适量掺氢(200-300L/H)可显著降低汽油车CO和HC排放(降幅达67.9%-92.6%和85%-89.6%),但NOx排放随掺氢量的增加而持续上升；柴油车CO排放因氢气预混燃烧缩短滞燃期而增加,NOx排放因车型和后处理技术[1]差异呈现不同趋势。VOCs排放特征表明,汽油车掺氢后烷烃占比显著增加,而柴油车VOCs组分变化较小。本研究为氢能在传统内燃机车辆中的推广应用提供了数据支撑,建议结合后处理技术降低NOx排放,提高实用性。 |
| 英文摘要: |
| In Through on-vehicle testing systems and bench tests, The paper systematically explored the influence of hydrogen blending technology on the emissions of conventional gaseous pollutants (CO, HC, NOx) and volatile organic compounds (VOCs) from light-duty gasoline vehicles (LDGV) and diesel vehicles (LDDT, HDDT). Seven test vehicles meeting the National IV and National V emission standards were selected for the experiment, including 3 gasoline vehicles, 3 light-duty diesel vehicles, and 1 heavy-duty diesel vehicle. A portable emission measurement system (PEMS) was used to monitor the concentration of exhaust pollutants in real time, and a gas chromatography - mass spectrometry (GC-MS) instrument was employed to analyze the components of VOCs.The results showed that appropriate hydrogen blending (200-300L/H) could significantly reduce the CO and HC emissions of gasoline vehicles (with reduction rates of 67.9%-92.6%and 85%-89.6% respectively).However emissions increased because the premixed combustion of hydrogen shortened the ignition delay period, and the NOx emissions showed different trends due to variations in vehicle models and after-treatment technologies. The emission characteristics of VOCs indicated that the proportion of alkanes in gasoline vehicles increased significantly after hydrogen blending, while the change in the VOCs components of diesel vehicles was relatively small.This research provided data support for the promotion and application of hydrogen energy in traditional internal combustion engine vehicles, and it was recommended to optimize after-treatment technologies to reduce NOx emissions. |
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