Cl. Cavalcante et Dm. Ruthven, ADSORPTION OF BRANCHED AND CYCLIC PARAFFINS IN SILICALITE .1. EQUILIBRIUM, Industrial & engineering chemistry research, 34(1), 1995, pp. 177-184
Gravimetric equilibrium isotherms are reported for adsorption of branc
hed and cyclic C-6 paraffins on silicalite. In addition to the isother
ms, Henry constants and heats of adsorption are reported for 2-methylp
entane, 3-methylpentane, 2,2-dimethylbutane, 2,3-dimethylbutane, methy
lcyclopentane, and cylohexane. Adsorption capacities are in the range
of 4-7 wt %. All isotherms are of type 1 in Brunauer's classification.
Adsorption saturation limits, estimated from the experimental results
by Langmuir regression, show a deceasing trend with increasing temper
ature. Adsorption equilibrium constants follow the trend double-branch
ed < single-branched < cyclic paraffins. Heats of adsorption for the s
ingle-branched paraffins increase slightly with loading, but for the d
ouble-branched and cyclic paraffins the variation of heat of adsorptio
n with coverage is more pronounced.