Investigation of the flow in the vortex chamber with centrifugal fluidizing bed with and without combustion

Heat and mass transfer at sublimation of a single chromium (III) and zirconium (IV) β-diketonate particle in the inert gas mixture

“…Numerical simulation of heat and mass transfer with Cr(aa) 3 and Zr(dpm) 4 precursors sublimation in the mixture of inert gases Ar and He has been carried out. The addition of helium to argon leads to a significant increase in the mass flow intensity and a decrease of the full time of sublimation.…”

“…1. The ratio of inert components Ar and He at sublimation of the particles of Cr(aa) 3 and Zr(dpm) 4 : points -simulation data, and lines -approximation for subsequent calculations in the forced convection mode. …”

“…The considered phenomenon is nonstationary sublimation of a single spherical particle of the precursor (chromium (III) acetylacetonate Cr(aa) 3 or zirconium (IV) dipivaloyl-methane Zr(dpm) 4 ). The sublimation is believed to occur uniformly over the entire surface of the solid particle, and the bulk sublimation inside the pores of the material is not taken into account.…”

“…The necessary high concentration of precursor in the vapor phase can be achieved through sublimation under the conditions of intensive heat and mass transfer. High intensity of heat supply to the surface of particles suspended in an inert carrier gas may be obtained in a centrifugal fluidized bed of large inert particles in the vortex chamber [3]. For the optimum design of the vortex chamber the essential is the kinetics of substance sublimation, depending on the thermodynamic and transport properties of the precursor and carrier gas.…”

Investigation of the kinetic laws affecting the organic suspension granulation in the fluidized bed

“…The fractional composition of solid (suspended) particles varies and depends on the animal species and age, feed diet and pre-treatment of its components. Apparatus with a suspended layer or fluidized bed devices have proved to be universal equipment with high specific power [8,9]. Therefore, in order to minimize the processing cost of the moist organic substances, it is expedient to use the devices of this type for the granulation purposes.…”