Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (6): 20220151.doi: 10.7503/cjcu20220151

• Physical Chemistry • Previous Articles    

Effects of Thermodynamic Data on Combustion Characters of 1,3-Butadiene

REN Nana1, XUE Jie1, WANG Zhifan2, YAO Xiaoxia3, WANG Fan1()   

  1. 1.Institute of Atomic and Molecular Physics,Sichuan University,Chengdu 610065,China
    2.School of Electronic Engineering,Chengdu Technological University,Chengdu 611730,China
    3.College of Chemical Engineering,Sichuan University,Chengdu 610065,China
  • Received:2022-03-09 Online:2022-06-10 Published:2022-04-26
  • Contact: WANG Fan E-mail:wangf@scu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21973063)

Abstract:

In this work, thermodynamic data for 102 species in a skeletal reaction mechanism for combustion of 1,3-butadiene were calculated based on the G4 method. Effects of anharmonic vibration, scaling factor for frequencies and internal rotations on these thermodynamic data of these species were investigated. The results show that effects of internal rotations are sizeable on thermodynamic data, while the anharmonic effect and different scaling factor for frequencies do not have a much effect on these thermodynamic data. Agreement between available experimental results and the present thermodynamic data will be improved when the internal rotations are considered. Effects of thermodynamic data obtained in this work on adiabatic combustion temperature and ignition delay time of 1,3-butadiene were also studied. The results indicate that experimental thermodynamic data for small molecules such as CO and CO2 should be adopted to obtain reliable adiabatic combustion temperatures. On the other hand, ignition delay times with the original thermodynamic data diff considerably from those using thermodynamic data obtained in this work. The results indicate that effects of ignition delay times are affected by thermodynamic data through their effect on rate constants of reverse reactions. Furthermore, species whose thermodynamic data has large impact on ignition delay times are also identified. These works will be important in obtaining reliable thermodynamic data and kinetic mechanism for combustion.

Key words: Thermodynamic data, Anharmonicity, Frequency scale factor, Internal rotor, Combustion kinetic mechanism

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