Cumulative Pore Size Distribution Research Articles

Permeability relationships using Darcy Permeability, Vacuum Decay, Pressure Decay, and Pore Size Distribution methods on graphitic materials

A study has been carried out in an effort to more fully explore the relationships which exist between different methods of permeability measurement on graphitic materials. Much of this work serves to support that which was previously completed by Hutcheon, Longstaff, Warner and Wiggs. Linear relationships have been confirmed to exist in the laminar flow region between the Darcy Permeability Value and 1. (1) the Vacuum Decay Permeability Value 2. (2) the Viscous Flow Coefficient term from the Pressure Decay Method, as well as 3. (3) the Slip Flow Term from the Pressure Decay Method when considering results from various grades of graphite having markedly different Pore Size Distribution Spectra. It was also confirmed that 4. (4) the cumulative Pore Size Distribution Spectra may be analysed to calculate an equivalent Darcy Permeability Value. The Pore Distribution analysis included molded and extruded samples, two of which having a permeability value twofold greater than any tested by Wiggs. It is significant that an agreement in permeability values may be obtained using the various methods of measurement. An analysis of the subject relationships has been made in an attempt to evaluate these data using theoretical concepts as applied to the flow of gas through porous media.

An Analytical Expression for Cumulative Pore Volumes and Pore Size Distributions

An Analytical Expression for Cumulative Pore Volumes and Pore Size Distributions