首页> 外文期刊>Journal of Atmospheric Chemistry >Unique isoprene oxidation products demonstrate chlorine atom chemistry occurs in the Houston, Texas urban area
【24h】

Unique isoprene oxidation products demonstrate chlorine atom chemistry occurs in the Houston, Texas urban area

机译:独特的异戊二烯氧化产物证明氯原子化学发生在德克萨斯州休斯敦市区

获取原文
获取原文并翻译 | 示例
           

摘要

As part of the 2000 Texas Air Quality Study (TexAQS), we studied the isoprene oxidation process under ambient conditions to discern the presence of chlorine atom (Cl) chemistry in the Houston, Texas urban area. By measuring chloromethylbutenone (CMBO) and an isomer of chloromethylbutenal (CMBA), we clearly observed sixteen episodes of active Cl chemistry during the 24-day experiment. Estimated median Cl concentration during each of these episodes was between the detection limit of ~10~2 atoms cm~(-3) and 50_(-30)~(+70) × 10~4 atoms cm~(-3). Cl concentration during all the episodes averaged 7.6_(-2.0)~(+4.7)×10~4 atoms cm~(-3) and thus amounted to less than 3% of the OH concentration during the same periods. During the episodes, the fraction of oxidation chemistry initiated by Cl ranged from 3-43% and was strongly dependent on the quantity and type of hydrocarbons present in the atmosphere. Because of its intermittent presence and low concentration, Cl is not a broadly influential oxidant in the Houston, Texas urban area.
机译:作为2000年德克萨斯州空气质量研究(TexAQS)的一部分,我们研究了环境条件下的异戊二烯氧化过程,以确定德克萨斯州休斯顿市区中氯原子(Cl)化学的存在。通过测量氯甲基丁烯酮(CMBO)和氯甲基丁烯醛的异构体(CMBA),我们在24天的实验过程中清楚地观察到16次活性C1化学反应。在每个事件中,估计的中位Cl浓度在〜10〜2个原子cm〜(-3)和50 _(-30)〜(+70)×10〜4个原子cm〜(-3)的检出限之间。所有事件中的Cl浓度平均为7.6 _(-2.0)〜(+4.7)×10〜4原子cm〜(-3),因此小于同期OH浓度的3%。在这些事件中,Cl引发的氧化化学反应的分数范围为3-43%,并强烈取决于大气中存在的碳氢化合物的数量和类型。由于其间歇性存在和低浓度,Cl在得克萨斯州休斯顿市区不是广泛影响的氧化剂。

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