Item  Ratio of Prototype to Model λ, ratio of radius   Homogeneous  Heterogeneous Particle Diameter ----- λ 1 Reactor Volume λ3 λ3 λ3 Catalyst surface/volume ----- λ 1 Volumetric rate of flow λ3 λ2 λ3 Reactor volume/volumetric flowrate 1 λ 1

Table 3: Geometrical Relations in Chemical Similitude.