物理化学学报 >> 2000, Vol. 16 >> Issue (11): 1043-1047.doi: 10.3866/PKU.WHXB20001115

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FTIR研究HCO自由基与NO2反应的动力学

陈平, 郑小明, Meyer S, Temps F   

  1. 浙江大学催化研究所,杭州 310028|Institute of Physical Chemistry,Kiel University,Kiel 24098,Germany
  • 收稿日期:2000-01-31 修回日期:2000-04-18 发布日期:2000-11-15
  • 通讯作者: 陈平

FTIR Study of Kinetics of the Reaction between HCO Radicals and NO2

Chen Ping, Zheng Xiao-Ming, Meyer S, Temps F   

  1. Institute of Catalysis,Zhejiang University,Hangzhou 310028|Institute of Physical Chemistry,Kiel University,Kiel 24098,Germany
  • Received:2000-01-31 Revised:2000-04-18 Published:2000-11-15
  • Contact: Chen Ping

关键词: FTIR, HCO自由基, NO2, 化学动力学, 基元反应

Abstract:

In this work, mixtures of HCHO-NO2-Ar were photolyzed under stationary conditions using a high-pressure Hg lamp atλ =300~ 340 nm and HCHO as a probe molecule. The HCO radicals were generated in the reaction system, and the kinetics of the reaction between HCO radicals and NO2 was investigated at room temperature in Ar gas at 5.7× 104 Pa pressure by FTIR spectroscopy. The main reaction products including CO, CO2, NO, HONO and H2O were detected. A small amount of N2O was found only at longer reaction times when NO2 consumption was complete. These product molecules were formed in consecutive reactions from several reaction channels. From the yields of CO and CO2,branching ratios were determined and their kinetic mechanism was discussed.

Key words: FTIR, HCO radicals, NO2, Chemical Kinetics, Elementary reactions