Soot Formation in Unstrained Diffusion Flames
作者： Etienne Robert , Nils-Erik Olofsson , Henrik Bladh , Jonathan Johnsson , Per-Erik Bengtsson
DOI: 10.1080/00102202.2014.958219
关键词: Analytical chemistry 、 Diffusion flame 、 Laser-induced incandescence 、 Chemistry 、 Temperature gradient 、 Chemical physics 、 Soot 、 Incandescence 、 Thermophoresis 、 Diffusion 、 Carbon nanotube
摘要: The formation of soot particles has been investigated in CH4/O2 diffusion flames using a unique burner design, which allows the creation nearly unstrained planar reaction sheet. Spatially resolved volume fractions were obtained laser-induced incandescence. These measurements and sooting limits as function bulk flow across flame mixture strength. Samples collected thermophoretic sampling analyzed electron microscopy, revealing broad range microstructures including with unusually large primary diameters carbon nanotubes. A theoretical model is presented, confirms that under certain conditions 1D nature field strong adverse temperature gradient on fuel side result being held place by forces allowed to grow for very long time periods. Some these so-called super aggregates reached sizes tens microns beca...
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