Laser Ignition and Flame Temperature for Low-Density Mixtures of Lignite Coal and Pentaerythritol Tetranitrate (Petn)

摘要

We have studied laser ignition (1064 nm, 120 mu s) of mixtures of lignite coal (brown coal) particles of size <= 0.1 mm and pentaerythritol tetranitrate (PETN) additives. We established that as the amount of PTEN additives increases in the range 0-50 wt.%, the critical ignition energy density of the mixtures decreases monotonically from 2.9 to 2.0 J/cm(2). We used spectral pyrometry to determine that the flame temperature for the mixture increases from 1800 K to 2100 K.