SCI和EI收录∣中国化工学会会刊

›› 2011, Vol. 19 ›› Issue (3): 424-433.

• CATALYSIS, KINETICS AND REACTORS • Previous Articles     Next Articles

A Study of Acetylene Production by Methane Flaming in a Partial Oxidation Reactor

LIU Yefei, WANG Tiefeng, LI Qingxun, WANG Dezheng   

  1. Beijing Key Laboratory of Green Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
  • Received:2010-09-17 Revised:2011-04-28 Online:2011-06-28 Published:2011-06-28
  • Supported by:
    Supported by the National Natural Science Foundation of China(20976090);the Foundation for the Author of National Excellent Doctoral Dissertation of China(200757)

A Study of Acetylene Production by Methane Flaming in a Partial Oxidation Reactor

刘业飞, 王铁峰, 李庆勋, 王德峥   

  1. Beijing Key Laboratory of Green Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
  • 通讯作者: WANG Tiefeng, E-mail: wangtf@tsinghua.edu.cn
  • 基金资助:
    Supported by the National Natural Science Foundation of China(20976090);the Foundation for the Author of National Excellent Doctoral Dissertation of China(200757)

Abstract: The partial oxidation of hydrocarbons is an important technical route to produce acetylene for chemical industry.The partial oxidation reactor is the key to high acetylene yields.This work is an experimental and numerical study on the use of a methane flame to produce acetylene.A lab scale partial oxidation reactor was used to produce ultra fuel-rich premixed jet flames.The axial temperature and species concentration profiles were measured for different equivalence ratios and preheating temperatures,and these were compared to numerical results from Computational Fluid Dynamics(CFD)simulations that used the Reynolds Averaged Navier-Stokes Probability Density Function(RANS-PDF)approach coupled with detailed chemical mechanisms.The Leeds 1.5,GRI 3.0 and San Diego mechanisms were used to investigate the effect of the detailed chemical mechanisms.The effects of equivalence ratio and preheating temperature on acetylene production were experimentally and numerically studied.The experimental validations indicated that the present numerical simulation provided reliable prediction on the partial oxidation of methane.Using this simulation method the optimal equivalence ratio for acetylene production was determined to be 3.6.Increasing preheating temperature improved acetylene production and shortened greatly the ignition delay time.So the increase of preheating temperature had to be limited to avoid uncontrolled ignition in the mixing chamber and the pyrolysis of methane in the preheater.

Key words: partial oxidation, fuel rich flame, acetylene, methane, detailed chemical mechanism

摘要: The partial oxidation of hydrocarbons is an important technical route to produce acetylene for chemical industry.The partial oxidation reactor is the key to high acetylene yields.This work is an experimental and numerical study on the use of a methane flame to produce acetylene.A lab scale partial oxidation reactor was used to produce ultra fuel-rich premixed jet flames.The axial temperature and species concentration profiles were measured for different equivalence ratios and preheating temperatures,and these were compared to numerical results from Computational Fluid Dynamics(CFD)simulations that used the Reynolds Averaged Navier-Stokes Probability Density Function(RANS-PDF)approach coupled with detailed chemical mechanisms.The Leeds 1.5,GRI 3.0 and San Diego mechanisms were used to investigate the effect of the detailed chemical mechanisms.The effects of equivalence ratio and preheating temperature on acetylene production were experimentally and numerically studied.The experimental validations indicated that the present numerical simulation provided reliable prediction on the partial oxidation of methane.Using this simulation method the optimal equivalence ratio for acetylene production was determined to be 3.6.Increasing preheating temperature improved acetylene production and shortened greatly the ignition delay time.So the increase of preheating temperature had to be limited to avoid uncontrolled ignition in the mixing chamber and the pyrolysis of methane in the preheater.

关键词: partial oxidation, fuel rich flame, acetylene, methane, detailed chemical mechanism