Citation: WEI Na-Na, ZHAO Wei-Xiong, FANG Bo, WANG Chun-Hui, YANG Na-Na, ZHANG Wei-Jun. Kinetic Studies of Reaction between OH Radical and Alkanes[J]. Chinese Journal of Analytical Chemistry, ;2020, 48(8): 1050-1057. doi: 10.19756/j.issn.0253-3820.201135 shu

Kinetic Studies of Reaction between OH Radical and Alkanes

WEI Na-Na ^1,2, ,
ZHAO Wei-Xiong ¹ ,
FANG Bo ^1,2 ,
WANG Chun-Hui ^1,3 ,
YANG Na-Na ^1,2 ,
ZHANG Wei-Jun ^1,3

1.
Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230026, China;
2.
University of Science and Technology of China, Hefei 230026, China;
3.
School of Environmental Science and Optoelectronics Technology, University of Science and Technology of China, Hefei 230026, China

Received Date: 16 March 2020
Revised Date: 18 May 2020

Fund Project: This work was supported by the National Natural Science Foundation of China (Nos. 91544228, 41627810), the Instrument Developing Project of the Chinese Academy of Sciences (No. YZ201626), the Youth Innovation Promotion Association, CAS (No. 2016383) and the CASHIPS Director's Fund (Nos. BJPY2019B02, YZJJ2018QN7).

Kinetic studies of the reactions between ·OH and alkanes were performed with laser-flash photolysis and Faraday rotation spectrometer (LFP-FRS). The ·OH was generated by flash photolysis of ozone with a 266 nm pulsed laser, the decay of the ·OH concentration was directly measured with a time-resolved FRS spectrometer at 2.8 μm under the pseudo-first-order, and the reaction rate constant of methane with ·OH at 5 kPa was measured to be 6.59×10^-15 cm³/(molecule·s). Meanwhile, the rate constants of methane, ethane and propane reacted with ·OH under different pressure conditions were compared. The reaction process was simulated by implementing several existed reaction channels into a chemical kinetic model, which provided a basis for studying the important atmospheric chemical mechanism and reaction process of ·OH radical.
- Laser-flash photolysis,
- Faraday rotation spectroscopy,
- OH radical,
- Reaction kinetics
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