Dielectric-gravimetric-oscillometric measurements

Combined dielectric gravimetric oscillometric measurements of sorption equilibria of methane (CH4, 5.5) in polycarbonate (Goodfellow, UK), cp. Chap. 5, Sect. 3.4, (Figs. 6.30, 6.31). 

Ad 4. Dielectric-gravimetric-oscillometric measurements of sorption equilibria of methane in (swelling) polycarbonate. 

Combining the dielectric measurements with either manometric, gravimetric or oscillometric measurements of gas adsorption equilibria states, one gets calibration curves allowing one the determination of Gibbs excess adsorbed masses by purely electric measurements which normally can be performed fairly quickly and on site in industrial situations. 

The impedance measurements of this system have been combined with oscillometric-gravimetric measurements leading to both the volume of the swelling polymer and the mass of CO2 sorbed at a given gas pressure, cp. Chap. 5. These combined measurements show that there are nearly linear relations between the dielectric permittivity and the gas pressure as well as the volume of the polymer in the sorption state and the gas pressure, cp. data and Figures given in Sect. 3.2. 

Figure 6.31. Specific volume of polycarbonate (GoodfeUow, UK) swelling due to the sorption of methane (CH4, 5.5) at T = 308 K for pressures up to 4 MPa and static dielectric permittivity (8,) of the (methane loaded) polymer [52, 6.3]. The volume has been determined by combined osciUometiic-gravimetric measurements, cp. Chap. 5. Figures 6.30, 6.31 refer to the same set of combined oscillometric-gravimetric-dielectric experiments [6.3, 6.41].

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See also in sourсe #XX -- [ ]

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