Acta Chimica Sinica ›› 2002, Vol. 60 ›› Issue (2): 251-255. Previous Articles     Next Articles

Original Articles

乙烷/H2O/O2/N2体系中光致过氧化物的产生

胡敏;齐斌;陈忠明;张远航;唐孝炎   

  1. 北京大学环境科学中心.北京(100871);环境模拟与污染控制国家重点联合实验 室;陕西师范大学化学与材料科学学院
  • 出版日期:2002-02-15 发布日期:2002-02-15

Photo-induced peroxide formation in the ethane/H2O/O2/N2 system

Hu Min;Qi Bin;Chen Zhongming;Zhang Yuanhang;Tang Xiaoyan   

  1. Beijing Univ., Center of Environmental Sci..Beijing(100871)
  • Online:2002-02-15 Published:2002-02-15

Photochemical formation of peroxides in the ethane/H2O/O2/N2 system was studied with LP-FTIR and HPLC techniques. Hydrogen peroxide, ethyl hydroperoxide (CH3CH2OOH, EHP) and peroxyacetic acid [CH3(O)OOH, PAA] were proved to be the peroxide products in the degradation of ethane. Moreover, methyl hydroperoxide (CH3OOH, MHP) hydroxymethyl hydroperoxide (HOCH2OOH, HMHP) and dimethyl peroxide (CH3OOCH3, DMP) were identified for the first time in the system. The dominant peroxide products were H2O2, EHP and MHP with the maximum calculated yields of 6.8%, 6.4% and 6.7%, respectively. MHP was mainly generated from the photolysis of acet aldehyde formed in thee degradation of ethane. The identification of HMHP provide san evidence for the formation of Criegee intermediate.CH2OO. in the degradation of ethane. The OH radical initiated degradation of ethane was possibly one of the main sources of H2O2, MHP and EHP in the troposphere.

Key words: ETHANE, HIGH SPEED LIQUID CHROMATOGRAPHY, PHOTOCHEMICAL SMOG, INFRARED SPECTROPHOTOMETRY, HYDROXY GROUP, FREE RADICAL REACTION, DEGRADATION REACTION, PHOTOCHEMICAL REACTION, PEROXIDE

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