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化学学报
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化学学报 ›› 2006, Vol. 64 ›› Issue (21): 2133-2137.    下一篇

研究论文

大气条件下O3与乙炔反应速率常数的测定

杜林1,2, 徐永福*,2, 葛茂发*,1, 贾龙3, 王庚辰4, 王殿勋1   

  1. (1中国科学院化学研究所北京分子科学国家实验室 北京 100080)
    (2中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室 北京 100029)
    (3北京师范大学大气环境研究中心 北京 100875)
    (4中国科学院大气物理研究所中层大气遥感与探测开放实验室 北京 100029)
  • 投稿日期:2006-05-29 修回日期:2006-07-24 发布日期:2006-11-14
  • 通讯作者: 徐永福

Determination of Rate Constants for Ozone Reactions with Acetylene under Atmospheric Conditions

DU Lin1,2; XU Yong-Fu*,2; GE Mao-Fa*,1; JIA Long3; WANG Geng-Chen4; WANG Dian-Xun1   

  1. (1 Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080)
    (2 State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029)
    (3 Research Center for Atmospheric Environment, Beijing Normal University, Beijing 100875)
    (4 Division for Middle Atmosphere and Remote Sensing, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029)
  • Received:2006-05-29 Revised:2006-07-24 Published:2006-11-14
  • Contact: XU Yong-Fu

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O3是对流层大气中一种重要的氧化剂, 其与反应活性气体的反应是大气对流层中重要的反应过程, 对于研究空气污染的对策有重要意义. 我们使用自行建设的烟雾箱模拟反应装置, 结合O3分析仪和气相色谱研究了O3和乙炔的反应. 研究测得O3和乙炔在室温下(15 ℃)反应的4次实验的速率常数的平均值为4.13×10－21 cm3•molecule－1•s－1, 其变动系数为7%. 与文献中采用其它方法得到的实验值相吻合. 所得结果表明, 我们测定的反应速率常数有较高的精密度, 我们所建的大气反应烟雾箱模拟系统是可靠的, 可以用于大气O3浓度条件下O3的其它大气化学反应过程的深入研究, 为进一步深入研究大气中其它重要反应活性气体的化学反应提供了一定的基础.

关键词: 臭氧, 乙炔, 动力学, 反应速率常数

Ozone is an important oxidant in the troposphere, and its reactions with reactive gases are important processes in the troposphere, which has a significance for the research on countermeasures of air pollution. The simulative reaction equipment of smog chamber, made in our laboratory, was used to study ozone reactions with acetylene in terms of monitoring instruments of ozone analyzer and gas chromatography. A mean value of 4.13×10－21 cm3•molecule－1•s－1 for rate constant was obtained from four experiments under room temperature of about 15 ℃. Its variant coefficient is 7%. Our rate constant is within the range reported by other researchers using different experimental conditions and detecting methods. Results show that the precision of determination of rate constants is high from our experiments. Our self-made simulation system of smog chamber for atmospheric reactions is reliable, which can be applied to deep research of other ozone reactions under atmospheric ozone concentrations. Our results and experimental system provide a good basis for further research on chemical reactions of other important reactive gases in the atmosphere.

Key words: ozone, acetylene, kinetics, rate constant