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Prediction of surface tension of naphtha reformate using UNIFAC
Author(s) -
Darwish E. I.,
AlSahhaf T. A.,
Fahim M. A.
Publication year - 1994
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450720622
Subject(s) - naphtha , catalytic reforming , surface tension , unifac , chemistry , thermodynamics , boiling , boiling point , standard deviation , absolute deviation , range (aeronautics) , analytical chemistry (journal) , chromatography , materials science , mathematics , catalysis , composite material , organic chemistry , activity coefficient , statistics , aqueous solution , physics
The surface tension of naphtha reformate cuts (60−170°C) were predicted using a modified UNIFAC group contribution method. The naphtha was distilled into eleven cuts of 10°C intervals to obtain narrow boiling range cuts. The surface tensions were determined in the temperature range 10−50°C and were compared with predicted values. A standard deviation of 5.9% was found using this method, versus 3.7% when the corresponding states method was used over the temperature range of 60−170°C. However, for the higher temperature range of 140−170°C, this method gave a standard deviation of 2.9% versus 7.6% for the other method.