Impacts of particle geometry on the characteristics of porous materials

 Impacts of particle geometry on the characteristics of porous materials

This study provides comprehensive insights into the influence of particle geometry on the characteristics of porous materials. Three-dimensional (3D) porous models featuring various particle geometries —a sphere, cylinders with height-to-diameter ratios of 0.1, 1.0, and 10, and a cube— were generated with isotropic particle arrangements. Generalized equations for dimensionless specific surface area, absolute permeability, thermal conductivity, and mass diffusivity were proposed, showing a relative deviation rate between actual and predicted values of lower than 0.104. The findings reveal that lower sphericity results in a higher specific surface area. 
For instance, models with sphericities of 0.471 (coin-shaped cylinders) and 1.000 (spheres) demonstrate up to a 2.41-fold difference in specific surface area at comparable porosities. In addition, the lower sphericity induces high thermal conductivity, low mass diffusivity and low absolute permeability. 
These observations suggest that conventional equations should be adjusted to account for particle geometry for more accurate predictions and optimizations.

Global Particle Physics Excellence Awards


#Sciencefather
#ParticleGeometry
#PorousMaterials
#MaterialScience
#Nanomaterials
#Microstructure
#Porosity
#Adsorption
#FiltrationTech
#SurfaceArea



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