Page 133 - Gas Adsorption Equilibria

3. Gravimetry 119

Gravimetric adsorption measurements are used today to characterize
porous media [3.10, 3.12, 3.19], to measure gas adsorption equilibria [3.13,
3.14, 3.18, 3.55], and to investigate adsorption kinetics [3.14-3.18], [4.21-
4.23]. We here will mainly discuss methods to measure pure gas and mixture
gas adsorption equilibria gravimetrically. Other aspects can only be taken into
account by presenting few complementary examples.

This chapter is organized as follows: In Sect. 2 we consider pure gas
adsorption measurements by both two beam and single beam balances.
Section 3 is devoted to thermogravimetry. In Section 4 multicomponent gas
adsorption equilibria are discussed. Finally in Sect. 5 pros and cons of
gravimetry especially compared to volumetry/manometry are elucidated. A
list of symbols and abbreviations used is given followed by references cited.

* ) This table in no way claims to be exclusive or complete.