A new set of united-atom force field parameters is proposed for simulating the phase equilibria of branched alkanes. These parameters complement the already existing set of Nath, Escobedo, and de Pablo revised (NERD) [Nath et al., J. Chem. Phys. 105, 4391 (1998); Nath and de Pablo, Mol. Phys. 98, 231 (2000)] force field parameters. The proposed force field is used to study vapor–liquid equilibria for various isomers of alkanes up to C8. Results of simulations are found to be in good agreement with available experimental data.

1.
S. K.
Nath
,
F. A.
Escobedo
, and
J. J.
de Pablo
,
J. Chem. Phys.
105
,
4391
(
1998
).
2.
S. T.
Cui
,
P. T.
Cummings
, and
H. D.
Cochran
,
Fluid Phase Equilib.
141
,
45
(
1997
).
3.
B.
Smit
,
S.
Karaborni
, and
J. I.
Siepmann
,
J. Chem. Phys.
102
,
2126
(
1995
).
4.
W. E.
Chapman
,
K. E.
Gubbins
,
G.
Jackson
, and
M.
Radosz
,
Ind. Eng. Chem. Res.
29
,
1709
(
1990
).
5.
S. K.
Nath
,
F. A.
Escobedo
,
J. J.
de Pablo
, and
I.
Patramai
,
Ind. Eng. Chem. Res.
37
,
3195
(
1998
).
6.
A. Z.
Panagiotopoulos
,
Mol. Phys.
61
,
813
(
1987
).
7.
M.
Laso
,
J. J.
de Pablo
, and
U. W.
Suter
,
J. Chem. Phys.
97
,
2817
(
1992
).
8.
G. C. A. M.
Mooij
,
D.
Frankel
, and
B.
Smit
,
J. Phys.: Condens. Matter
4
,
L255
(
1992
).
9.
F. A.
Escobedo
and
J. J.
de Pablo
,
J. Chem. Phys.
105
,
4391
(
1996
).
10.
A. Z.
Panagiotopoulos
,
V.
Wong
, and
M. A.
Floriano
,
Macromolecules
31
,
912
(
1998
).
11.
J. J.
de Pablo
,
Q.
Yan
, and
F. A.
Escobedo
,
Annu. Rev. Phys. Chem.
50
,
377
(
1999
).
12.
H.
Sun
,
J. Phys. Chem.
102
,
7338
(
1998
).
13.
M. G.
Martin
and
J. I.
Siepmann
,
J. Phys. Chem. B
103
,
4508
(
1999
).
14.
J. R.
Errington
and
A. Z.
Panagiotopoulos
,
J. Phys. Chem. B
103
,
6314
(
1999
).
15.
S.
Toxvaerd
,
J. Chem. Phys.
107
,
13
(
1997
).
16.
S. K.
Nath
and
J. J.
de Pablo
,
Mol. Phys.
98
,
231
(
2000
).
17.
W. I.
Jorgensen
,
J. D.
Madura
, and
C. J.
Swenson
,
J. Am. Chem. Soc.
106
,
6638
(
1984
).
18.
R. H.
Boyd
and
P. V. K.
Pant
,
Macromolecules
24
,
6325
(
1991
).
19.
T. J. H.
Vlugt
,
R.
Krishna
, and
B.
Smit
,
J. Phys. Chem. B
103
,
1102
(
1999
).
20.
M. D.
Macedonia
and
E. D.
Maginn
,
Mol. Phys.
96
,
1375
(
1999
).
21.
M.
Lal
and
D.
Spencer
,
J. Chem. Soc., Faraday Trans.
69
,
1502
(
1973
).
22.
B. D. Smith and R. Srivastava, Thermodynamic Data for Pure Compounds: Part A Hydrocarbons and Ketones (Elsevier, Amsterdam, 1986).
23.
In the original publications of NERD forcefield parameters for the linear alkanes (Refs. 1 and 16 above), a V3 value of 701.32 has been reported. The correct value of V3 should be 791.32.
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