Experimental and numerical study of a HMDSO-seeded premixed laminar low-pressure flame for SiO2 nanoparticle synthesis
作者： Omid M. Feroughi , Lei Deng , Sebastian Kluge , Thomas Dreier , Hartmut Wiggers
DOI: 10.1016/J.PROCI.2016.07.131
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摘要: Abstract Silicon dioxide nanoparticles are generated in a lean hydrogen/oxygen flat flame doped with small amounts of hexamethyldisiloxane (HMDSO) stabilized by water-cooled sintered bronze matrix. The burner is housed an optically-accessible low-pressure (3 kPa) chamber. Temperature fields were determined via multi-line laser-induced fluorescence (LIF) using added NO as target species. Gas-phase silicon oxide (SiO) was detected exciting the weakly temperature-dependent rovibrational Q11(32) transition A–X (0,0) vibronic band system at 235.087 nm. Semi-quantitative concentration profiles function height-above-burner (HAB) obtained after exploiting measured temperature and correcting LIF intensities for temperature-dependence ground-state population collisional quenching effective lifetimes. Particle sizes HAB molecular-beam sampling subsequent particle mass spectrometry (PMS). experimental data used to develop simple kinetics model HMDSO combustion SiO2 precursor formation nucleation growth H2/O2 flame. incorporated CFD simulation account facility effects that arise from modified flow heat transfer between reactor
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