• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >OH Radical Reaction Rate Coefficients, Infrared Spectrum, and Global Warming Potential of (CF3)(2)CFCH=CHF (HFO-1438ezy(E))
【24h】

OH Radical Reaction Rate Coefficients, Infrared Spectrum, and Global Warming Potential of (CF3)(2)CFCH=CHF (HFO-1438ezy(E))

机译：（CF3）（2）CFCH = CHF（HFO-1438ezy（E））的OH自由基反应速率系数，红外光谱和全球变暖潜能

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

Rate coefficients, k(T), for the OH radical + (E)-(CF3)(2)CFCH=CHF ((E)-1,3,4,4,4-pentafluoro-3-(trifluoromethyl)-1-butene, HF0-1438ezy(E)) gas-phase reaction were measured using pulsed laser photolysis -laser -induced fluorescence (PLP-LIF) between 214 and 380 K and 50 and 450 Torr (He or N-2 bath gas) and with a relative rate method at 296 K between 100 and 400 Torr (synthetic air). Over the range of pressures included in this study, no pressure dependence in k(T) was observed. k(296 K) obtained using the two techniques agreed to within with (3.26 0.26) X 10-13 cm(3) molecule(-1) s(-1) (26 absolute uncertainty) obtained using the PLP-LIF technique. k(T) displayed non-Arrhenius behavior that is reproduced by (7.34 0.30) x 10-T-19(2) exp[(481 +/- 10)/T) cm(3) molecule(-1) s(-1). With respect to OH reactive loss, the atmospheric lifetime of HFO-1438ezy(E) is estimated to be similar to 36 days and HFO-1438ezy(E) is considered a very short-lived substance (VSLS) (the actual lifetime will depend on the time and location of the HFO-1438ezy(E) emission). On the basis of the HFO-1438ezy(E) infrared absorption spectrum measured in this work and its estimated lifetime, a radiative efficiency of 0.306 W m(-2) ppb(-1) (well-mixed gas) was calculated and its 100-year time-horizon global warming potential, GWP100, was estimated to be 8.6. CF3CFO, HC(O)F, and CF2O were identified using infrared spectroscopy as stable end products in the oxidation of HFO-1438ezy(E) in the presence of O-2. Two additional fluorinated products were observed and theoretical calculations of the infrared spectra of likely degradation products are presented. The photochemical ozone creation potential of HFO-1438ezy(E) was estimated to be similar to 2.15.
机译：OH基+（E）-（CF3）（2）CFCH = CHF（（E）-1,3,4,4,4-五氟-3-（三氟甲基）-1）的速率系数k（T） -丁烯，HF0-1438ezy（E）气相反应使用脉冲激光光解法测量-激光诱导的荧光（PLP-LIF）在214和380 K和50和450托之间（He或N-2浴气体）和使用296 K在100至400 Torr（合成空气）之间的相对速率方法。在本研究包括的压力范围内，未观察到以k（T）为单位的压力依赖性。使用两种技术获得的k（296 K）与使用PLP-LIF技术获得的（3.26 0.26）X 10-13 cm（3）分子（-1）s（-1）（26绝对不确定度）一致。 k（T）显示了非阿伦尼乌斯行为，由（7.34 0.30）x 10-T-19（2）exp [（481 +/- 10）/ T）cm（3）分子（-1）s（- 1）。关于OH反应性损失，HFO-1438ezy（E）的大气寿命估计与36天相似，HFO-1438ezy（E）的寿命很短（VSLS）（实际寿命取决于HFO-1438ezy（E）发射的时间和位置）。根据在这项工作中测量的HFO-1438ezy（E）红外吸收光谱及其估计寿命，计算出0.306 W m（-2）ppb（-1）（充分混合的气体）的辐射效率，其辐射效率为100年时间全球变暖潜势GWP100估计为8.6。 CF3CFO，HC（O）F和CF2O使用红外光谱在O-2存在的情况下作为HFO-1438ezy（E）氧化中的稳定终产物鉴定。观察到另外两种氟化产物，并给出了可能降解产物的红外光谱的理论计算。 HFO-1438ezy（E）的光化学臭氧产生潜能估计约为2.15。

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