Reaction mechanism of methane activation using non-equilibrium pulsed discharge at room temperature

Shigeru Kado, Kohei Urasaki, Yasushi Sekine, Kaoru Fujimoto, Tomohiro Nozaki, Ken Okazaki

Research output: Contribution to journalArticle

103 Citations (Scopus)

Abstract

The reaction mechanism of methane activation using non-equilibrium pulsed discharge was largely clarified from the emission spectroscopic study and experiments with higher hydrocarbons and some kinds of isotopes. The strong emission of atomic carbon and C2 swan band system was observed as well as H Balmer series emission. This indicates that methane was highly dissociated into C and H by electron impact, which is consistent with the result of high C2D2 composition in produced acetylene when the mixture of CH4 and D2 was fed into discharge region. High electron energy contributed to produce atomic carbon directly from methane, and high electron density promoted the dehydrogenation from CH 3, CH2 and CH to produce atomic carbon consecutively. The reason for the high selectivity to C2H2 was the high concentration of CH or C2 formed from atomic carbon, and the repetition mechanism of decomposition and recombination among C, CH, C 2 and C2H2.

Original languageEnglish
Pages (from-to)2291-2297
Number of pages7
JournalFuel
Volume82
Issue number18
DOIs
Publication statusPublished - 2003 Dec 1

Keywords

  • Acetylene
  • Methane dehydrogenation
  • Spark discharge

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry

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