Título: Experimental and Numerical Study of Monodisperse Nanoparticles Concentration in a Nano-Differential Mobility Analyzer
Autores: CAMARGO, E. C. M.; LOBATO, F. S.; DAMASCENO, J. J. R.; AROUCA, F. O.
Revista: Brazilian Journal of Chemical Engineering, 1(1), 1-27, 2021.
Resumo: Nanotechnology applications and the harmful effects of nanoparticles dispersed in atmospheric air are currently under discussion. In this case, we can cite applications in different areas such as: filtration, health effects studies, exposure chamber studies; engine exhaust research and measuring indoor air quality. Considering the variety of products made of nanoparticles available on the market, there is a need to produce and characterize a monodisperse flow. The objective of this study was to generate a monodisperse nano aerosol using a nano-differential mobility analyzer (Nano-DMA) and to estimate empirical models to describe the monodisperse nanoparticle distribution. For this purpose, a theoretical balance based on Wiedensohler's equilibrium charge distribution used to predict values for the aerosol input and output as a function of particle diameter is proposed. In order to correct the obtained profiles, an inverse problem is proposed and solved by using the Differential Evolution (ED) algorithm and empirical models. The experimental results showed that the Nano-DMA reached the goals proposed. From the numerical point of view, the obtained results demonstrated the efficiency of the proposed methodology to estimate the monodisperse nanoparticle concentration.
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