Combustion of aluminum powder with steam entrained in a helium plasma using a 2.45 GHz microwave plasma torch

J. E. Palomino, S. G. Bilén, T. Cawley, B. Ludwig, S. D. Knecht

Research output: Contribution to journalArticle

Abstract

Ignition and combustion of ∼20 µm diameter aluminum powder was achieved with a helium-steam-based 2.45 GHz microwave plasma torch as a proof of concept due to interest in utilizing aluminum powder as a fuel source for power generation given the material's high energy density. Optical emission spectroscopy of the plasma in air, with steam-entrainment, and with aluminum particle injection was obtained in order to observe the radical species present. The combustion products were analyzed with x-ray diffraction (XRD) to determine the post-combustion composition and compared with published XRD data involving aluminum-water combustion. The results revealed that a microwave plasma torch in a steam environment is capable of igniting aluminum particles and sustains combustion between aluminum powder and radicals from water molecules. The torch design results in a mixing delay between the aluminum and steam radical reactants prior to sustained combustion. Enhanced mixing will be pursued with an improved injector design.

Original languageEnglish (US)
Article number185204
JournalJournal of Physics D: Applied Physics
Volume53
Issue number18
DOIs
StatePublished - Apr 29 2020

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

Fingerprint Dive into the research topics of 'Combustion of aluminum powder with steam entrained in a helium plasma using a 2.45 GHz microwave plasma torch'. Together they form a unique fingerprint.

  • Cite this