Enhanced Voidage Correlations for Packed Beds of Various Particle Shapes and Sizes

Effect of material type and particle size distribution on pressure drop in packed beds of large particles: Extending the Ergun equation

“…Therefore, for a sphere / = 1, and for non-spherical particles 0 < / < 1. Many experimental and modeling studies have been conducted to find a correlation between bed voidage and particle properties [15,[18][19][20][21][22][23]. These studies have shown that voidage of a packed bed depends not only on particle sphericity but also on several other factors including particle size and PSD, surface roughness, method of packing, and Nomenclature A, B constants in Eq.…”

Equilibrium partition of rapeseed oil between supercritical CO2 and prepressed rapeseed

“…The resulting value of ε p was 0.318. Corresponding values for "square" pellets were b = 0.498 g/cm 3 , d p = 5.724 mm (diameter of a sphere having the same surface as our cylindrical pellets), ε = 0.658 (using the equation of Benyahia and O'Neill [8] for packed bed of solid cylinders when D/d p = 3.00), and ε p = 0.310.…”

“…Section 2.2), and ε was estimated as 0.390 using the equation proposed by Benyahia and O'Neill [8] for D/d p = 32 and = 0.85 (assumed sphericity of "ground" pellets). The resulting value of ε p was 0.318.…”

Numerical optimization of a structured tubular reactor for Fischer–Tropsch synthesis

“…At an angle of 0°the model simplifies to a monolith structure, where no radial convective transport of heat takes place. The catalyst holdup e cat of the channel can be derived from a correlation for the bed porosity e bed in random packed beds, which depends on the ratio of channel diameter over the catalyst particle diameter [37] (see Appendix C, C2). For the Packed CCFS in this study ( Fig.…”