Densities and Void Fraction

As an additional service, EURECAT provides various density measurements that can be used for a better prediction of catalyst quantities loaded in the reactor in case of dense loading, as well as the void fraction which can be used for calculating the pressure drops generated by the catalyst bed.

Analyses on the unregenerated catalyst :

CBD :	Compacted Bulk Density. This density is measured by a method developed by EURECAT, Lab014, which is in good agreement with the standard method ASTM D 4164-82, but is more reliable.
PDLD :	Predicted Dense Loading Density. This value is useful to predict the actual density of a reactor dense loaded with the PETROVAL Densicat technique. It is measured by a method developed by EURECAT, Lab014, derived from PETROVAL know-how.
PD :	Particle Density or Envelope Density, Grain Density Density of the material without its inter-particle void, measured by the Micromeritics GEOPICK, method Lab015, which gives results equivalent to the conventional mercury Porosimetry analysis.

Densities are expressed in g/cm³ (= kg/litre = t/m³), or in lb/cf³, with the following conversion factor :
1g/cm³ = 62.43 lb/ft³ or 1 lb/ft³ = 0.01602 g/cm³.

VF :	Void Fraction (for dense loaded bed) This value is useful for evaluating the potential pressure drop that will form in a reactor dense loaded with the Densicat technique. It is calculated from particle density and Predicted Dense Loading Density. Void Fraction is a dimensionless number.