Analytical estimation of particle shape formation parameters in a plasma-chemical reactor

Abstract

Analytical estimation of particle shape formation parameters in a plasma-chemical reactor implementing the process of thermochemical decomposition of liquid droplet agents (precursors) in the flow of a hightemperature gaseous heat-transfer medium was obtained. The basic factor which determines the process is the increase of concentration of a dissolved salt precursor component at the surface of a liquid particle due to solvent evaporation. According to the physical concept of the method of integral balance the diffusion process of concentration change is divided into two stages: the first stage is when the size of gradient layer does not reach the center of a spherical droplet and the second stage when the concentration at the center of a liquid droplet begins to change. The solutions for concentration fields were found for each stage using the method of integral balance taking into account the formation of salt precipitate when the concentration at the surface of the droplet reaches certain equilibrium value. The results of estimation of the influence of various reactor operation parameters and characteristics of initial solution (precursor) on the morphology of particles formedmass fraction and localization of salt precipitate for various levels of evaporation.

Identification of the Distribution Function and Characterization of the Nano– And Micropowders Sizes

“…В связи с интенсивным развитием порошковых микро-и нанотехнологий [1], моделирования в механике многофазных потоков [2][3][4][5], оптимизации процессов производства частиц [6][7][8][9][10], исследования механизмов твердофазных химических реакций [11] В обоих случаях набор исходных данных относительно короткий, поэтому решения в Excel могут быть представлены в полном объеме.…”