Zs. Gonenc et al., ADSORPTION PARAMETERS OF SOME C5-C-8 PARAFFINIC HYDROCARBONS ON PLATINUM ALUMINA BY GAS-CHROMATOGRAPHIC PULSE TECHNIQUES, Applied catalysis. A, General, 103(1), 1993, pp. 35-42
Adsorption isotherms of six C5-C-8 paraffinic hydrocarbons (n-pentane,
n-hexane, n-heptane, iso-octane, cyclohexane and methylcyclohexane) o
n the commercial 0.3 wt.-% Pt/Al2O3 reforming catalyst were investigat
ed under isothermal chromatographic conditions using the elution techn
ique in the temperature range 458-510 K. Average enthalpies of adsorpt
ion were determined by using the isosteres obtained from experimental
adsorption isotherms and compared with those calculated on the basis o
f pulse retention data at infinite dilution for eleven C5-C-8 alkanes
including the six mentioned above. The isotherms were also fitted to t
he Langmuir equation for the evaluation of adsorption equilibrium coef
ficients, Gibbs free energies, average adsorption enthalpies and entro
pies.