A study of adsorption equilibria of oxygen, nitrogen and
oxygen-nitrogen mixtures on types 4A, 5A, 13X and Na-Mordenite molecular
sieve pellets has been made.
Pure component isotherms, using a volumetric apparatus, have
been measured for each gas on each adsorbent at pressures up to 9 bar
and for temperatures of 278.15,293.15 and 303.15 K.
Curve fitting of the pure canponent isotherms has been attempted
using the kinetic model of Gonzalez and Holland, the vacancy solution
model, the statistical thermodynamic model and a mathematical equation
similar to the Hill-de Boer model. With the exception of the kinetic
model, good curve fitting was obtained.
Binary equilibria data have been measured, using a constant
volume method, for mixtures of oxygen and nitrogen at pressures of
1.7 and 4.4 bar and at temperatures of 278.15,293.15 and 303.15 K
for each of the adsorbents. These results have been presented graphically
as equilibrium phase compositions and corresponding total
adsorption loadings.
The binary experimental equilibria data have been examined
against values predicted by mixture models (kinetic model, the extended
vacancy solution model, the statistical thermodynamic model, the Cook
and Basmadjian model, and the ideal adsorbed solution theory) using
regression parameters obtained from the pure component isotherms. The
statistical thermodynamic model and the ideal adsorbed solution theory
gave the best representation of the experimental data.
The activity coefficients of the adsorbed phase for the binary
experimental data have been calculated and the results showed no
appreciable deviation of the adsorbed phase from ideality. / British Council and the University of Gezira (Sudan)
| Identifer | oai:union.ndltd.org:BRADFORD/oai:bradscholars.brad.ac.uk:10454/4203 |
| Date | January 1982 |
| Creators | Sorial, George Ayad |
| Contributors | Granville, W.H. |
| Publisher | University of Bradford, Postgraduate School of Studies in Chemical Engineering. |
| Source Sets | Bradford Scholars |
| Language | English |
| Detected Language | English |
| Type | Thesis, doctoral, PhD |
| Rights | <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-nc-nd/3.0/88x31.png" /></a><br />The University of Bradford theses are licenced under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/">Creative Commons Licence</a>. |
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