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The formation of ultrafine particulate matter in the early stage of high-sodium lignite combustion was quantitatively investigated in a downward Hencken flat-flame burner under two ambiences of 1200K and 1500K. Spatially resolved measurement of the ultrafine particle size distributions (PSDs) was made by using a scanning mobility particle sizer with a high sensitivity in the 4.45–156.8nm size range...
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