کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4452873 | 1312112 | 2010 | 14 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Generation of nano-sized Ar–N2 compound particles by homogeneous nucleation and heterogeneous growth in a supersonic expansion Generation of nano-sized Ar–N2 compound particles by homogeneous nucleation and heterogeneous growth in a supersonic expansion](/preview/png/4452873.png)
The generation of nano-sized particles was numerically investigated for the heterogeneous growth of nitrogen on homogeneously nucleated argon seed particles in a supersonic expansion. Gas dynamic equations for 1D supersonic flow were solved together with the classical nucleation theory and Hill's growth model.Heterogeneous growth on homogeneously nucleated seeds effectively increased the final particle size to the range of 10–200 nm. The new process could increase the particle mass by a factor of 10 relative to the case of pure gas expansion under comparable pressure and temperature conditions. Increase in particle size resulted predominantly from the enhanced heterogeneous condensation of nitrogen, and the growth by argon condensation could even be reduced relative to the case of pure gas expansion. Final particle size easily reached 200 nm, which has been very difficult to achieve by any of the existing homogeneous growth processes.
Journal: Journal of Aerosol Science - Volume 41, Issue 3, March 2010, Pages 243–256