Multisite Langmuir model applied to the interpretation of sorption of n-paraffins in 5A zeolite

Citation
Jac. Silva et Ae. Rodrigues, Multisite Langmuir model applied to the interpretation of sorption of n-paraffins in 5A zeolite, IND ENG RES, 38(6), 1999, pp. 2434-2438
Citations number
21
Categorie Soggetti
Chemical Engineering
Journal title
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN journal
08885885 → ACNP
Volume
38
Issue
6
Year of publication
1999
Pages
2434 - 2438
Database
ISI
SICI code
0888-5885(199906)38:6<2434:MLMATT>2.0.ZU;2-3
Abstract
Adsorption equilibrium isotherms of n-paraffins from methane to decane on 5 A zeolites (crystals and pellets) were compiled in a wide range of temperat ure and pressure. The data were correlated using the MSL (multisite Langmui r) model for homogeneous surfaces. It is shown that it is possible to corre late all adsorption isotherms by maintaining thermodynamic consistency on m odel parameters. However, for paraffins with more than seven carbons it is necessary to account for the effects of lateral interaction of adsorbed mol ecules. The heat of adsorption for C-1-C-10 paraffins linearly increases wi th the carbon number, ranging from 4.6 kcal/mol for methane up to 23.2 kcal /mol for n-decane.