...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Atmospheric environment >Photolysis of multifunctional carbonyl compounds under natural irradiation at EUPHORE
【24h】

Photolysis of multifunctional carbonyl compounds under natural irradiation at EUPHORE

机译：越厄厄自然辐照下多官能羰基化合物的光解

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

Photolysis is one the main drivers in atmospheric chemistry. Volatile organic compounds that bear one or more carbonyl functions can absorb UV light between 295 nm and 450 nm, enabling them to possibly photolyze in the atmosphere. Yet, very few data are available regarding the impact of such photolysis processes on the fate of multifunctional carbonyls. In the present work, we investigated the photodissociation of one ?-diketone and three hydroxyketones under real sunlight at the European Photoreactor EUPHORE. The obtained photolysis frequencies normalized by NO2 photolysis were: 2,3-pentanedione (PTD): (3.4 ? 0.6) ? 10-2, 4-hydroxy-4methyl-2-pentanone (4H4M2P): (6.2 ? 2.9) ? 10-4, 3-hydroxy-3-methyl-2-butanone (3H3M2B): (8.2 ? 4.9) ? 10-4, and 4-hydroxy-3-hexanone (4H3H): (5.1 ? 3.0) ? 10-4. These ratios represent the first data for three of them, to our knowledge. Reaction products were also investigated and carbon balances of 70?100% in the gasphase have been obtained. A photolysis reaction mechanism is proposed for 4H3H for the first time, based on the observed products. Atmospheric lifetimes span between 39 min for PTD to 1?2 days for hydroxyketones. The present work shows that photolysis of multi-oxygenated VOCs may be significant and needs to be taken into account in atmospheric chemistry models where it represents an additional source of radicals.
机译：光解是大气化学中的主要驱动因素。承受一个或多个羰基功能的挥发性有机化合物可以吸收295nm和450nm之间的UV光，使它们能够在大气中的光解。然而，关于这种光解过程对多官能羰基的命运的影响很少有数据。在目前的工作中，我们在欧洲光反应器euphore的真实阳光下调查了一种α-酮和三个羟基酮的光度解剖。通过NO 2光解标准化的所得光解频率为：2,3-戊酰胺（PTD）：（3.4≤0.6）？ 10-2,4-羟基-4methyl-2-戊酮（4H4M2P）：（6.2？2.9）？ 10-4,3-羟基-3-甲基-2-丁酮（3H3M2B）：（8.2≤4.9）？ 10-4和4-羟基-3-己酮（4H3H）：（5.1？3.0）？ 10-4。这些比率代表了我们知识的三个的第一个数据。还研究了反应产物，并获得了碳余量为70℃的碳平衡。基于所观察到的产品，首次提出光解反应机理4H3H。对于PTD至1？羟基酮的大气寿命跨越39分钟。本作者表明，多氧化VOC的光解可能是显着的，并且需要在大气化学模型中考虑，其中它代表了一种自由基的额外来源。

著录项

  • 来源
    《Atmospheric environment》 |2021年第5期|118352.1-118352.11|共11页
  • 作者

    Tomas A.; Aslan L.; Munoz A.; Rodenas M.; Vera T.; Borras E.; Coddeville P.; Fittschen C.;

  • 作者单位

    Univ Lille Ctr Energy & Environm Inst Mines Telecom IMT Lille Douai F-59000 Lille France;

    Univ Lille Ctr Energy & Environm Inst Mines Telecom IMT Lille Douai F-59000 Lille France;

    Fdn CEAM EUPHORE Labs C Charles R Darwin 14 Parque Tecnol Valencia 46980 Spain;

    Fdn CEAM EUPHORE Labs C Charles R Darwin 14 Parque Tecnol Valencia 46980 Spain;

    Fdn CEAM EUPHORE Labs C Charles R Darwin 14 Parque Tecnol Valencia 46980 Spain;

    Fdn CEAM EUPHORE Labs C Charles R Darwin 14 Parque Tecnol Valencia 46980 Spain;

    Univ Lille Ctr Energy & Environm Inst Mines Telecom IMT Lille Douai F-59000 Lille France;

    Univ Lille CNRS UMR 8522 PhysicoChim Proc Combust & Atmosphere PC2A F-59000 Lille France;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Oxygenated-VOCs; Lifetime; Atmosphere; Dione; Hydroxyketones; Photolysis;

    机译：氧化效应;寿命;气氛;迪酮;羟基酮;光解;

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