Information provided by mercury porosimetry

Before using the data to calculate textural characteristics, the curves obtained must be analyzed to determine in which pressure and volume domains calculations based on the Laplace-Washburn equation are possible. An example of a typical result on a porous silica sample with an average particle size of 15 μm is shown in figure 7 . Several ranges can be distinguished on these intrusion-extrusion curves, which are characteristic of a powder sample. Between 0 and 0.04 MPa, pressure increases steadily without any particular...