Get access

Effects of spark duration on minimum ignition energy for methane/air mixture

Authors

  • Qi Zhang,

    Corresponding author
    1. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, People's Republic of China
    • State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, People's Republic of China
    Search for more papers by this author
  • Wei Li,

    1. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, People's Republic of China
    Search for more papers by this author
  • Shixi Zhang

    1. Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China
    Search for more papers by this author

Abstract

This work investigated the effects of spark duration on the minimum ignition energy of methane/air mixtures in the closed vessel. The main findings from these experiments (all with methane/air mixture with the volume fraction 8.5%) are: (a) for given methane/air mixture, the minimum ignition energy is not constant and it changes with the spark duration, (b) the minimum ignition energies decrease from 6.8 mJ to 0.4 mJ as the spark durations increase from 0.657 μs to 4.31 μs, (c) the explosion pressure reaches the highest value when the spark duration is 2.627 μs and the minimum ignition energy 1.3 mJ, (d) the explosion pressures change with the ignition energy value and spark duration, and (e) the explosion temperature reaches the highest value when the spark duration is 2.627 μs and the minimum ignition energy 1.3 mJ. © 2011 American Institute of Chemical Engineers Process Saf Prog, 2011.

Get access to the full text of this article

Ancillary