TY - JOUR
T1 - New modelling approach to liquid–solid reaction kinetics: from ideal particles to real particles
AU - Salmi, Tapio
AU - Grénman, Henrik
AU - Wärnå, Johan
AU - Murzin, Dmitry
N1 - tk.
PY - 2013
Y1 - 2013
N2 - Typical features of liquid-solid reactions were reviewed: reaction kinetics, mass transfer effects and particle morphology. It was concluded that classical liquid-solid models based on ideal, non-porous geometries (sphere, infinite cylinder, slab) cannot satisfactorily describe real reactive solid particles with various surface defects, such as cracks, craters and limited porosity. 'Typically a too low reaction order for the reactive solid is predicted by the classical models. The surface morphology can be revealed by electron microscopy, which gives inspiration to develop new mathematical models for reactive solids.Generalized product layer and shrinking particle models were developed for arbitrary geometries deviating dramatically from ideal geometries. The approach is based on the use of a shape factor (a), which can obtain high values for particles with surface defects. The modelling approach was illustrated with numerical simulations and an experimental case, leaching of zinc sulphide with ferric ions: A general methodology for investigation of fluid-solid reactions was proposed.
AB - Typical features of liquid-solid reactions were reviewed: reaction kinetics, mass transfer effects and particle morphology. It was concluded that classical liquid-solid models based on ideal, non-porous geometries (sphere, infinite cylinder, slab) cannot satisfactorily describe real reactive solid particles with various surface defects, such as cracks, craters and limited porosity. 'Typically a too low reaction order for the reactive solid is predicted by the classical models. The surface morphology can be revealed by electron microscopy, which gives inspiration to develop new mathematical models for reactive solids.Generalized product layer and shrinking particle models were developed for arbitrary geometries deviating dramatically from ideal geometries. The approach is based on the use of a shape factor (a), which can obtain high values for particles with surface defects. The modelling approach was illustrated with numerical simulations and an experimental case, leaching of zinc sulphide with ferric ions: A general methodology for investigation of fluid-solid reactions was proposed.
KW - Fluid-solid reactions
KW - Particle size distribution
KW - Shape factor
KW - Fluid-solid reactions
KW - Particle size distribution
KW - Shape factor
KW - Fluid-solid reactions
KW - Particle size distribution
KW - Shape factor
U2 - 10.1016/j.cherd.2013.08.004
DO - 10.1016/j.cherd.2013.08.004
M3 - Artikel
SN - 0957-5820
VL - 91
SP - 1876
EP - 1889
JO - Process Safety and Environmental Protection
JF - Process Safety and Environmental Protection
IS - 10
ER -