کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10385064 882486 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of nozzle geometry and processing parameters on the formation of nanoparticles using FSP
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Effect of nozzle geometry and processing parameters on the formation of nanoparticles using FSP
چکیده انگلیسی
Two numerical models were developed to simulate the sauter mean diameter (SMD) of the droplets during atomization and the growth of particles inside the flame by coagulation and sintering. These models were linked to CFD to simulate flame spray pyrolysis (FSP) process. The effects of reactor geometries and processing parameters on the temperature and velocity profiles, droplet evaporation and particle growth were predicted using the validated computation models. The results show that increasing the oxidant gap size (from 0.1 mm to 0.5 mm) by keeping the dispersion gas pressure drop constant at 1 bar (transonic regime ∼310-315 m/s) across the nozzle tip increased the gas to liquid mass ratio (GLMR) by a factor of 6. This reduced the flame height and lowered the residence time of the particles in the high temperature zone of the flame, thus, decreased the sintering rate and the growth of nanoparticles. The results also showed that decreasing the oxygen content of the dispersion gas helped to decrease the peak temperature of the flame and reduced the particle size. The simulation results can be used for the FSP equipment design and process optimization.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Research and Design - Volume 92, Issue 11, November 2014, Pages 2470-2478
نویسندگان
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