APPENDIX B
NRTL PARAMETERS AND
ANTOINE COEFFICIENTS
Tables B.1, B.2, and B.3 give binary interaction parameters (a,b, and c, respectively)
for the NRTL equation (Equations B.1 and B.2) for systems that have been used and
discussed extensively throughout the book. All parameters are regressed values from
the Dortmund databank, obtained from Aspen Plus
1
.
gi¼exp PjxjtjiGji
PkxkGki
þX
j
xjGij
PkxkGkj
tij PmxmtmjGmj
PkxkGkj
"#
(B.1)
where tij ¼aij þbij=TKðÞ and Gij ¼expðcijtij Þ(B.2)
Example of Using Tables B.1–B.3
Suppose the binary interaction coefficients are being sought for the benzene–
water system. We shall designate benzene as component iand water as component j.
Then, in Table B.1, progress down the first column until component iis found
(benzene). Then, progress down the row where component ihas been found and
search for the cell intersection with component jin the first row. It can be seen that
a
ij
¼45.191. To find a
ji
, repeat the procedure, but search for component jin the first
column, and then for the cell intersection with component iin the first row. In this
345
Understanding Distillation Using Column Profile Maps, First Edition. Daniel Beneke, Mark Peters,
David Glasser, and Diane Hildebrandt.
Ó2013 by John Wiley & Sons, Inc. Published 2013 by John Wiley & Sons, Inc.
