Page 103 - Gas Adsorption Equilibria
P. 103
2. Volumetry / Manometry 89
293 K < T < 673 K and for pressures up to 5.5 MPa. Data are given in Figure
2.5 that show clearly that nitrogen is adsorbed even at high temperatures.
Figure 2.3.
Experimental set-up for
volumetric high temperature
adsorption / desorption
experiments.
In calculating the adsorbed masses of nitrogen, the thermal expansion of
the storage and of the adsorption vessel at higher temperatures must be taken
into account. Also slight changes in the so-called helium-volume of the
zeolite depending also on temperature should be considered.
No coadsorption measurements at high temperatures using the volumetric /
manometric method seem to have been performed yet. Some experiments
with humid nitrogen, i. e. mixtures are presently (2003) under way
at the author’s institute. Data will be reported in the homepage of IFT,
cp. [4.15].
