...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Detailed Speciation of Intermediate Volatility and Semivolatile Organic Compound Emissions from Gasoline Vehicles: Effects of Cold-Starts and Implications for Secondary Organic Aerosol Formation
【24h】

Detailed Speciation of Intermediate Volatility and Semivolatile Organic Compound Emissions from Gasoline Vehicles: Effects of Cold-Starts and Implications for Secondary Organic Aerosol Formation

机译：汽油车辆的中间挥发性和半挥发性有机化合物排放的详细物种：冷启动的影响和对二次有机气溶胶形成的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Over the past two decades vehicle emission standards in the United States have been dramatically tightened with the goal of reducing urban air pollution. Secondary organic aerosol (SOA) is the dominant contributor to urban organic aerosol. Experiments were conducted at the California Air Resources Board Haagen-Smit Laboratory to characterize exhaust organics from 20 gasoline vehicles recruited from the California in-use fleet. The vehicles spanned a wide range of emission certification standards. We comprehensively characterized intermediate volatility and semivolatile organic compound emissions using thermal desorption two-dimensional gas-chromatography-mass-spectrometry with electron impact (GC X GC-EI-MS) and vacuum ultraviolet (GC X GC-VUV-MS) ionization. Single-ring aromatic compounds with unsaturated C4 and CS substituents contribute a large fraction of the intermediate volatility organic compound (IVOC) emissions in gasoline vehicle exhaust. The analyses of quartz filters used in GC X GC-VUV-MS show that primary organic aerosol emissions were dominated by motor oil. We combined our new emissions data with published SOA yield parametrizations to estimate SOA formation potential. After 24 h of oxidation, IVOC emissions contributed 45% of SOA formation; BTEX compounds (benzene, toluene, xylenes, and ethylbenzene), 40%; other VOC aromatics, 15%. The composition of IVOC emissions was consistent across the test fleet, suggesting that future reductions in vehicular emissions will continue to reduce SOA formation and ambient particulate mass levels.
机译：在过去的二十年中，美国的汽车排放标准已经大大提高，以减少城市空气污染为目标。二次有机气溶胶（SOA）是城市有机气溶胶的主要贡献者。在加州空气资源局Haagen-Smit实验室进行了实验，以表征从加利福尼亚使用中的机队招募的20辆汽油车中的废气有机物。这些车辆符合各种排放认证标准。我们使用带有电子碰撞（GC X GC-EI-MS）和真空紫外（GC X GC-VUV-MS）电离的热脱附二维气相色谱-质谱联用技术全面表征了中间挥发性和半挥发性有机化合物的排放。具有不饱和C4和CS取代基的单环芳族化合物占汽油汽车尾气中大部分挥发性有机化合物（IVOC）的排放量。对GC X GC-VUV-MS中使用的石英过滤器的分析表明，主要的有机气溶胶排放量主要是机油。我们将新的排放数据与已发布的SOA产量参数结合起来，以估算SOA形成潜力。氧化24小时后，IVOC排放占SOA形成的45％。 BTEX化合物（苯，甲苯，二甲苯和乙苯），40％；其他VOC芳烃，占15％。在整个测试车队中，IVOC排放的组成是一致的，这表明未来车辆排放的减少将继续减少SOA的形成和环境颗粒物的水平。

著录项

  • 来源
    《Environmental Science & Technology》 |2019年第3期|1706-1714|共9页
  • 作者

    Drozd Greg T.; Zhao Yunliang; Saliba Georges; Frodin Bruce; Maddox Christine; Chang M. -C. Oliver; Maldonado Hector; Sardar Satya; Weber Robert Jay; Robinson Allen L.; Goldstein Allen H.;

  • 作者单位

    Colby Coll, Dept Chem, Waterville, ME 04901 USA;

    Carnegie Mellon Univ, Ctr Atmospher Particle Studies, Pittsburgh, PA 15213 USA;

    Carnegie Mellon Univ, Ctr Atmospher Particle Studies, Pittsburgh, PA 15213 USA;

    Calif Air Resources Board, Sacramento, CA 95814 USA;

    Calif Air Resources Board, Sacramento, CA 95814 USA;

    Calif Air Resources Board, Sacramento, CA 95814 USA;

    Calif Air Resources Board, Sacramento, CA 95814 USA;

    Calif Air Resources Board, Sacramento, CA 95814 USA;

    Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA;

    Carnegie Mellon Univ, Ctr Atmospher Particle Studies, Pittsburgh, PA 15213 USA;

    Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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