Method and apparatus for performing adsorption and desorption an

Details Method and apparatus for performing adsorption and desorption an Method and apparatus for performing adsorption and desorption an

1996-07-26

1999-04-20

Brock, Michael

Measuring and testing

With fluid pressure

Porosity or permeability

738655, G01N 1508

Patent

active

058958410

ABSTRACT:
An adsorption and desorption analyzer for performing analyses on samples comprises a manifold for selectively storing one or two gases or vapors having different critical temperatures, at least two cells constructed and arranged to store a sample for analysis, a supply line having an isolation valve connecting each cell to the manifold, an absolute pressure transducer for monitoring the pressure in the manifold, vacuum means, a microprocessor for controlling the operation of the isolation valves and the application of gas or vapor or vacuum to the manifold and a coupling line having a differential pressure transducer having a smaller range than the range of the absolute pressure transducer, enables an operator to determine data points for characteristics of the samples under study more precisely and more rapidly than is possible using an analyzer having an identical absolute pressure transducer for each cell to determine the characteristics of the samples stored in the cells. The analyzer is also constructed and arranged to determine the characteristics of additional samples in addition to the first pair of samples compared.

REFERENCES:
patent: 3059478 (1962-10-01), Coggeshall et al.
patent: 3299713 (1967-01-01), Haul et al.
patent: 3349625 (1967-10-01), Benusa et al.
patent: 3555912 (1971-01-01), Lowell
patent: 4566326 (1986-01-01), Lowell
patent: 5133219 (1992-07-01), Camp
patent: 5360743 (1994-11-01), Lowell

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