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US 6,684,685 B2Granted
Liquid extrusion porosimeter and method
AssigneePorous Materials, Inc.
InventorsKrishna M. Gupta, Akshaya Jena
Life of this patent
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AssigneePorous Materials, Inc.
InventorsKrishna M. Gupta, Akshaya Jena
Estimating the term…
A porosimeter evaluates the porosity characteristics (specifically, pore volume, pore distribution and liquid permeability) of a porous sample of material. The porosimeter includes a fluid reservoir located below the sample, and a penetrometer comprising a vessel which catches any fluid displaced from the reservoir of fluid, wherein a level of fluid rises in the penetrometer when additional fluid enters the penetrometer. The sample is preferably wetted, with the same type of fluid which is in the reservoir, prior to placing the sample on the porosimeter. The porosimeter preferably also includes a membrane located between the sample and the reservoir of fluid. The membrane has pores with a size smaller than any of the sample pores. Pore volume of the sample is determined by measuring the change in fluid level in the penetrometer after pressure, which is above the bubble point pressure of the sample but below the bubble point pressure of the membrane, is applied to the sample. Permeability is measured by measuring rate of flow while the liquid level is above the sample.
A method of evaluating the porosity characteristics of a sample of material having a plurality of pores using a porosimeter comprising a pressurizable sample chamber for holding the sample, a membrane located at a bottom of the sample chamber and having a plurality of pores, wherein the membrane pores have a size smaller than any of the sample pores of interest, a reservoir of fluid located directly below the membrane, and a penetrometer coupled to the reservoir, wherein a level of fluid rises in the penetrometer when additional fluid enters the reservoir, comprising the steps of:
A method of evaluating the porosity characteristics of a sample of material having a plurality of pores using a porosimeter comprising a pressurizable sample chamber for holding the sample, a membrane located at a bottom of the sample chamber and having a plurality of pores, wherein the membrane pores have a size smaller than any of the sample pores of interest, a reservoir of fluid located directly below the membrane, and a penetrometer coupled to the reservoir, wherein a level of fluid rises in the penetrometer when additional fluid enters the reservoir, comprising the steps of:
A porosimeter for evaluating the porosity characteristics of a sample of material having a plurality of pores comprising:
Dependencies are inferred from the claim text.