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Combustion of Silane-Hydrogen-Nitrous oxide Mixtures: Analysis of Laminar Flame Propagation and Condensed Products

Journal Article · · Proceedings of the Combustion Institute
 [1];  [2];  [1];  [3];  [2];  [4];  [5];  [6]
  1. Tsinghua University, Beijing (China)
  2. King Abdullah University of Science and Technology (KAUST), Thuwal (Saudi Arabia)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. CEMHTI-CRNS, Orleans (France)
  5. CNRS-ICARE, Orleans (France)
  6. CNRS-ICARE, Orleans (France); Univ. d'Orleans (France)

The laminar burning rate, the explosion pressure, and the pressure rise coefficient have been measured for silane-nitrous oxide-argon mixtures using the spherically expanding flame technique in a constant volume combustion chamber. For these three parameters, the values obtained were higher than for hydrogen-nitrous oxide-argon and typical hydrocarbon-based mixtures. As an example, a maximum burning rate of 1800 g/m2 s was measured at 101 kPa, whereas under similar conditions, a maximum burning rate around 950 g/m2 s has been reported for hydrogen-nitrous oxide-argon mixtures. Here, the condensed combustion products formed in the silane-nitrous oxide-argon flames were sampled and characterized using electron micrograph, electronic diffraction, energy-dispersive spectroscopy, and X-ray powder diffraction. For all equivalence ratios, silica spherical particles with a mean diameter in the range 200-300 nm were observed. In addition, for mixtures with Φ ≥2.2, silicon nanowires were formed. X-ray diffraction experiments showed that the silicon nanowires are composed of a material referred to as “metal silicon” characterized by a cubic structure (lattice parameter: a = 5.425 Å) with the Fm-3m space group.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1647146
Alternate ID(s):
OSTI ID: 1777044
Report Number(s):
LLNL-JRNL--793422; 993497
Journal Information:
Proceedings of the Combustion Institute, Journal Name: Proceedings of the Combustion Institute Journal Issue: 2 Vol. 38; ISSN 1540-7489
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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