Open AccessOn fine particles synthesis using three-zone reactor
Author(s) -
А. А. Марков
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1611/1/012047
Subject(s) - dispersion (optics) , combustion , porous medium , mass transfer , control volume , conservation of mass , materials science , dimensionless quantity , barium titanate , mechanics , convective heat transfer , momentum (technical analysis) , thermal , thermodynamics , heat transfer , porosity , chemistry , composite material , physics , ceramic , finance , optics , economics
This paper reports a numerical study on thermal and mass dispersion in carbon combustion synthesis of oxides (CCSO) in porous media. A volume averaging of the microscopic conservation equations over an elementary volume is applied to derive the macroscopic conservation equations for convective and conductive heat and mass transfer in a porous media consisting of gas components mixture and solid particles of reactant species. The governing system of macroequations is the conservation of momentum, mass and energy for multicomponent gas-solid media using the heat and mass exchange between gas and solid phases. The model developed in dimensionless variables and similarity parameters is applied to numerical simulation of barium titanate micron particles synthesis in three-zone reactor using the thermal and mass dispersion. The results are in satisfactory agreement with experimental measurements. The dispersion strongly influences on the thermal front propagation as well as on the barium titanate synthesis rate. The three-zone reactor is more efficient compared to the flow-reactor.