초록 ▼

The invention is a system for measuring the permeation of a vapor or gas through a film or membrane. The device comprises a test cell which has two chambers which are separated by a membrane through which the permeation of a particular gas is measured. To one cell is fed a test gas or vapor either a

The invention is a system for measuring the permeation of a vapor or gas through a film or membrane. The device comprises a test cell which has two chambers which are separated by a membrane through which the permeation of a particular gas is measured. To one cell is fed a test gas or vapor either alone or in a mixture with a bulk gas. To the other side of the membrane is fed a bulk gas into which the permeating test gas or vapor permeates. Attached to the second chamber of the test cell is a means for analysis of the concentration of the test gas or vapor. This device further comprises a means for separately controlling the pressure in each chamber of the test cell. The device comprises a means for combining a portion of the bulk gas with the test gas or vapor in a manner such that the concentration of the test gas or vapor in the bulk gas can be carefully controlled. This means of combining the two gases is connected to the first chamber of the test cell. This system allows for the measurement of the permeation of a particular test gas or vapor through a particular membrane at widely varied temperature and pressure conditions.

대표청구항 ▼

A system for measuring the permeation of a test gas or vapor through a film or membrane, the system comprising (a) a means for introducing a test gas or vapor; (b) a means for regulating the flow and pressure of the test gas or vapor connected to the means for introducing the test gas or vapor; (c)

A system for measuring the permeation of a test gas or vapor through a film or membrane, the system comprising (a) a means for introducing a test gas or vapor; (b) a means for regulating the flow and pressure of the test gas or vapor connected to the means for introducing the test gas or vapor; (c) a means for introducing a bulk gas; (d) a means of regulating the flow and pressure of the bulk gas connected to the means for introducing the bulk gas; (e) a means for combining the test gas or vapor and a portion of the bulk gas and adapted for controlling the pressure and flow of such, said means for combining the test gas or vapor and a portion of the bulk gas is connected to the means for regulating the flow and pressure of the test gas or vapor and further connected to the means for regulating the flow and pressure of the bulk gas; (f) a test cell comprising (i) a first chamber connected to the means for combining test gas or vapor and a portion of the bulk gas wherein the first chamber is adapted for passing combined test gas or vapor and a portion of the bulk gas through the first chamber at a rate such that a portion of the test gas or vapor can permeate through a film or membrane; (ii) a second chamber connected to the means for regulating the flow and pressure of the bulk gas wherein the second chamber is adapted for flowing bulk gas through the chamber and for receiving test gas or vapor which permeates through the film or membrane; (iii) a means for securing the film or membrane such that the film or membrane separates the first and second chamber; wherein the pressure in the first chamber is regulated by the means for combining the test gas or vapor and a portion of the bulk gas; and the pressure in the second chamber is regulated by the means for regulating the flow and pressure of the bulk gas; (g) a means for analyzing the composition of a gas or vapor specially adapted for measuring the concentration of test gas or vapor, connected to the second chamber of the test cell or the means for combining the test gas or vapor and a portion of the bulk gas; (h) a means for regulating flow of the combined test gas or vapor and a portion of the bulk gas, adapted for regulating the flow of combined test gas or vapor and a portion of the bulk gas from the means for combining the test gas or vapor and a portion of bulk gas between the first chamber of the test cell and the means for analyzing the composition of a gas or vapor. (i) a first of transferring heat in contact with the first chamber adapted for regulating the temperature of the first chamber; and (j) a second means of transferring heat in contact with the second chamber adapted for regulating the temperature in the second chamber.