Patent ID: 8528384
Filing Date: 2013-09-10
Classification: G01N

Abstract:
1. A method for determination of the pore-mouth size distribution on the surface of porous materials, comprising the following steps. (i) While the backside of the sample is purged with a gas, the sample is immersed into a liquid wetting agent. (ii) Progress is monitored by either gradually decreasing the gas pressure and monitoring the gas flowrate or gradually decreasing the gas flowrate and monitoring the gas pressure. (iii) When the gas flow stops, the remaining pressure in the system corresponds to the largest pore-mouth size. (iv) The pore-mouth size distribution can be calculated through a “dry curve” and a “wet curve”, which are curves of the gas flowrate vs. pressure at the dry and wetted states of the sample. (v) The mean pore-mouth size can be calculated by the pressure that corresponds to the intersection point between the “wet curve” and the “half-dry curve”, wherein the “half-dry curve” is plotted with the data of the “dry curve” but halving each flowrate value.