...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Atmospheric chemistry and physics >Secondary organic aerosol formation from gasoline vehicle emissions in a new mobile environmental reaction chamber
【24h】

Secondary organic aerosol formation from gasoline vehicle emissions in a new mobile environmental reaction chamber

机译：在新的移动环境反应室中由汽油车辆排放产生的二次有机气溶胶

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We present a new mobile environmental reaction chamber for the simulation ofthe atmospheric aging of different emission sources without limitation fromthe instruments or facilities available at any single site. Photochemistry issimulated using a set of 40 UV lights (total power 4 KW). Characterisationof the emission spectrum of these lights shows that atmospheric aging ofemissions may be simulated over a range of temperatures (?7 to25 °C). A photolysis rate of NO2, JNO2, of(8.0 ± 0.7) × 10?3 s?1 was determined at25 °C. We demonstrate the utility of this new system by presentingresults on the aging (OH = 12 × 106 cm?3 h) ofemissions from a modern (Euro 5) gasoline car operated during a driving cycle(New European Driving Cycle, NEDC) on a chassis dynamometer in a vehicle testcell. Emissions from the entire NEDC were sampled and aged in the chamber.Total organic aerosol (OA; primary organic aerosol (POA) emission + secondary organic aerosol (SOA) formation) was(369.8–397.5)10?3 g kg?1 fuel, or(13.2–15.4) × 10?3 g km?1, after aging, with agedOA/POA in the range 9–15. A thorough investigation of the composition of thegas phase emissions suggests that the observed SOA is from previouslyunconsidered precursors and processes. This large enhancement in particulate matter mass fromgasoline vehicle aerosol emissions due to SOA formation, if it occurs acrossa wider range of gasoline vehicles, would have significant implications forour understanding of the contribution of on-road gasoline vehicles to ambientaerosols.
机译：我们提出了一个新的移动环境反应室，用于模拟不同排放源的大气老化，而不受任何单个站点可用的仪器或设施的限制。使用一组40个紫外线灯（总功率4 KW）模拟光化学反应。这些灯的发射光谱的特征表明，可以在一定温度范围（约7至25°C）上模拟大气的老化。 NO 2 ， J NO 2 的光解速率为（8.0±0.7）×10 在25℃下测定Δ3 s Δ1。我们通过介绍现代（Euro 5）汽油车排放的老化结果（OH = 12×10 6 cm ？3 h）来证明该新系统的实用性在车辆测试单元的底盘测功机上的行驶周期（新欧洲行驶周期，NEDC）中。对整个NEDC的排放进行采样并在室内进行老化。总有机气溶胶（OA;一次有机气溶胶（POA）排放+二次有机气溶胶（SOA）形成）为（369.8–397.5）10 ？3 g kg ？1 燃料，或（13.2–15.4）×10 ？3 g km ？1 ，老化后，OA / POA老化在9-15之间。对气相排放物成分的彻底研究表明，观察到的SOA来自先前未考虑的前体和工艺。如果SOA形成会导致汽油车气溶胶排放中的颗粒物质量大幅度增加，如果这种变化在更广泛的汽油车中发生，将会对我们对公路汽油车对环境气溶胶的贡献的理解产生重大影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号