Apparatus and method to measure properties of porous media
AssigneeImperial Innovations Limited
InventorsAlexander Bismarck, Georffery Frederick Hewitt, Karen Shu San Manley
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Abstract
A method to determine properties of a porous material, in which: a porous sample is prepared and sealed; first the sample is evacuated to near vacuum; then a non-wetting and electrically conducting fluid is passed through the sample at a known pressure and the volume of the fluid taken up by the sample is measured; then a small differential pressure is applied across the sample and the flow rate of the fluid through the sample is measured; and an alternating current is passed through the sample and the resistance across the sample is measured.
Claims6
A method to determine properties of a porous material, in which:
- a porous sample is prepared and sealed;
- first the sample is evacuated to near vacuum;
- then a non-wetting and electrically conducting fluid is passed through the sample at a known pressure and the volume of said fluid taken up by the sample is measured;
- then a small differential pressure is applied across the sample and the flow rate of said fluid through the sample is measured;
- and an alternating current (which can be varied) is passed through the sample and the resistance across the sample is measured.
Apparatus for determining properties of a porous material, the apparatus comprising:
- a sample cell for holding a sample of the porous material;
- two measuring tubes open at the bottom end to opposite ends of the sample and also connected to sumps for a non-wetting and electrically conducting fluid, and open at the top end to a vacuum pump;
- means for applying a fixed pressure to the system;
- means for applying a differential pressure across the sample;
- means for applying a current across the sample;
- and means for measuring the resistance across the sample.
Dependencies are inferred from the claim text.