Page 233 - Gas Adsorption Equilibria

4. Volumetric – Gravimetric Measurements 219

Figure 4.19. Instrument for volumetric-densimetric measurements of binary coadsorption
equilibria of gas mixtures on porous solids without using a gas chromatograph.
The magnetic suspension balance, cp. Fig. 4.18, near the center is complemented
by a thermostat at left, an electronic unit for automated measurements and control
in the rear, a monitor of a PC at right and a helium gas based instrument for leak
detection in the foreground at right. © IFT University of Siegen, 2002.

The masses of both components of the sorptive gas being adsorbed
can be determined from the mass balances, cp. (4.1), (4.45) as

Here indicates the total mass of sorptive gas component (i = 1, 2)
supplied to the storage vessel. Usually this quantity is calculated from an EOS
and measured data of pressure temperature (T) and volume of the storage
vessel including the volume of gas filled tubes and valves as