StanMix is based on the iPRSV equation of state. The iPRSV equation of state is an improved, by Stryjek-Vera modified, Peng-Robinson cubic equation of state. For mixtures the Wong-Sandler mixing rules are applied. It estimates vapor pressures accurately, the phase equilibrium correlation for mixtures is good, and the performance for thermodynamic conditions other than saturation and for other thermodynamic properties is satisfactory. Furthermore, this equation of state provides a good trade-off between simplicity of the model and accuracy, and the simplicity of the formulation positively affects computational speed. It is generally known that the liquid densities are not represented accurately by a CEoS. This applies also to the iPRSV model. In order to obtain a complete the thermodynamic model a third order polynomial function for the calculation of the ideal gas heat capacity was added.
StanMix is documented in the following references:
The StanMix components can be used as pure fluids or in a mixture. StanMix provides thermodynamic and transport properties for the fluids in Table 1. The listed FluidProp names (either short or long) must be used to specify the fluid name in the SetFluid method.
Table 1
FluidProp Name (short) | FluidProp Name (long) | Tc [°C] | Pc [bar] | MW [g/mol] | Tmin[°C] | Tmax[°C] |
1-C4H10O |
1-butanol |
74.1200 |
289.83 |
44.13 |
-50.00 |
1226.85 |
1-C8018O |
1-octanol |
130.2279 |
411.65 |
28.60 |
0.00 |
400.00 |
1-C3H8O |
1-propanol |
60.0960 |
263.56 |
51.70 |
59.85 |
350.00 |
2-C4H10O |
2-butanol |
74.1200 |
289.90 |
44.23 |
-73.15 |
1226.85 |
2-C3H8O |
2-propanol |
60.0960 |
235.25 |
47.64 |
-75.00 |
350.00 |
C3H6O |
acetone |
58.0800 |
234.95 |
46.96 |
-94.95 |
1500.00 |
air |
air |
28.8501 |
-142.14 |
35.89 |
-209.15 |
350.00 |
NH3 |
ammonia |
17.0305 |
132.45 |
112.98 |
-78.15 |
350.00 |
Ar |
argon |
39.9480 |
-122.29 |
48.98 |
-190.00 |
1226.85 |
C6H6 |
benzene |
78.1140 |
289.01 |
48.98 |
5.85 |
350.00 |
C12H10 |
biphenyl |
154.2100 |
496.00 |
31.21 |
19.85 |
350.00 |
C4H10 |
butane |
58.1240 |
152.01 |
37.97 |
-91.15 |
400.00 |
C10H14 |
butylbenzene |
134.2182 |
387.35 |
28.90 |
-87.85 |
1226.85 |
CO2 |
carbon dioxide |
44.0100 |
31.06 |
73.82 |
-57.15 |
400.00 |
C6H12 |
cyclohexane |
84.1620 |
280.49 |
40.75 |
6.85 |
400.00 |
D3 |
D3 |
84.1620 |
280.49 |
40.75 |
6.85 |
400.00 |
D4 |
D4 |
84.1620 |
280.49 |
40.75 |
6.85 |
400.00 |
D5 |
D5 |
84.1620 |
280.49 |
40.75 |
6.85 |
400.00 |
D6 |
D6 |
84.1620 |
280.49 |
40.75 |
6.85 |
400.00 |
CH3OCH3 |
dimethylether |
46.0680 |
126.95 |
52.40 |
-141.50 |
700.00 |
C12H10O |
diphenyl ether |
170.2072 |
503.65 |
30.80 |
15.00 |
600.00 |
C12H26 |
dodecane |
170.3348 |
295.61 |
24.86 |
-9.55 |
700.00 |
diethylbenzene |
Dowtherm J |
134.2200 |
383.00 |
28.55 |
0.00 |
400.00 |
C2H6 |
ethane |
30.0700 |
29.28 |
48.80 |
-153.15 |
350.00 |
C2H5OH |
ethanol |
46.0690 |
240.77 |
61.48 |
-114.15 |
700.00 |
C8H10 |
ethylbenzene |
106.1680 |
344.05 |
36.06 |
32.85 |
329.85 |
C2H6O2 |
ethylene glycol |
62.0678 |
446.85 |
82.00 |
-13.00 |
1000.00 |
C5H4O2 |
furfural |
96.1000 |
396.85 |
58.90 |
-50.00 |
160.00 |
C7H16 |
heptane |
100.2019 |
267.05 |
27.40 |
-73.15 |
1226.85 |
C6F6 |
hexafluoro benzene |
186.0000 |
243.52 |
33.38 |
0.00 |
400.00 |
C6H14 |
hexane |
86.1780 |
234.15 |
30.12 |
-41.15 |
400.00 |
H2 |
hydrogen |
2.0160 |
-229.55 |
20.47 |
-259.15 |
350.00 |
i-C4H10 |
isobutane |
58.1240 |
135.05 |
36.50 |
-108.15 |
135.05 |
i-C5H12 |
isopentane |
72.1510 |
187.25 |
33.90 |
-53.15 |
187.25 |
MD2M |
MD2M |
310.6900 |
326.25 |
11.79 |
-10.15 |
400.00 |
MD3M |
MD3M |
384.8430 |
355.25 |
9.96 |
2.85 |
400.00 |
MD4M |
MD4M |
458.9933 |
380.05 |
8.77 |
13.85 |
400.00 |
MD5M |
MD5M |
533.1500 |
398.65 |
7.63 |
21.85 |
400.00 |
MD6M |
MD6M |
607.3100 |
415.75 |
6.77 |
29.85 |
400.00 |
MDM |
MDM |
236.5315 |
290.94 |
14.15 |
-25.15 |
400.00 |
CH4 |
methane |
16.0425 |
-82.59 |
45.99 |
-182.46 |
351.85 |
CH4O |
methanol |
32.0420 |
239.43 |
80.96 |
-85.00 |
700.00 |
MM |
MM |
162.3790 |
245.60 |
19.39 |
-45.15 |
400.00 |
C10H8 |
naphthalene |
128.1740 |
475.20 |
40.51 |
86.85 |
249.85 |
N2 |
nitrogen |
28.0130 |
-146.95 |
34.00 |
-209.15 |
350.00 |
C8H18 |
octane |
114.2200 |
295.61 |
24.86 |
0.00 |
400.00 |
O2 |
oxygen |
31.9990 |
-118.38 |
50.90 |
-217.15 |
350.00 |
C5H12 |
pentane |
72.1510 |
196.55 |
33.68 |
-77.15 |
400.00 |
C6F12 |
PFCH |
79.1645 |
217.20 |
32.32 |
-41.15 |
400.00 |
C7F14 |
PP2 |
350.0000 |
211.85 |
20.60 |
0.00 |
600.00 |
C10F18 |
PP5 |
462.0000 |
291.85 |
17.88 |
0.00 |
400.00 |
C3H8 |
propane |
44.0970 |
96.67 |
42.50 |
-187.62 |
400.00 |
C8H10 |
p-xylene |
106.1680 |
344.05 |
36.06 |
32.85 |
329.85 |
R113 |
R113 |
187.3800 |
214.15 |
34.10 |
-34.95 |
400.00 |
R114 |
R114 |
170.9400 |
145.75 |
32.70 |
-94.00 |
400.00 |
R116 |
R116 |
138.0120 |
19.85 |
30.18 |
-100.75 |
400.00 |
R12 |
R12 |
120.9140 |
111.85 |
40.70 |
-140.00 |
273.15 |
R125 |
R125 |
120.0200 |
66.25 |
36.31 |
-40.15 |
400.00 |
R134a |
R134a |
102.0300 |
101.06 |
40.56 |
-63.15 |
400.00 |
R14 |
R14 |
88.0050 |
-45.55 |
37.40 |
-183.15 |
400.00 |
R142b |
R142b |
100.4960 |
136.45 |
43.30 |
-130.15 |
136.45 |
R22 |
R22 |
86.4800 |
96.05 |
49.80 |
-73.15 |
400.00 |
R23 |
R23 |
70.0130 |
25.91 |
48.41 |
-163.15 |
400.00 |
R245fa |
R245fa |
134.0488 |
154.05 |
36.40 |
-73.15 |
226.85 |
R32 |
R32 |
52.0240 |
78.41 |
58.30 |
-124.15 |
78.41 |
silox 1 |
silox 1 |
75.5717 |
74.31 |
50.42 |
-40.15 |
78.41 |
silox 2 |
silox 2 |
75.5717 |
74.31 |
50.42 |
-40.15 |
78.41 |
silox 3 |
silox 3 |
75.5717 |
74.31 |
50.42 |
-40.15 |
78.41 |
C7H8 |
toluene |
92.1410 |
318.65 |
41.06 |
12.85 |
399.85 |
C9H12 |
trimethylbenzene |
120.1900 |
364.10 |
31.27 |
56.85 |
359.85 |
C4H6O2 |
vinyl acetate |
86.0900 |
246.05 |
41.40 |
-73.15 |
1226.85 |
H2O |
water |
18.0150 |
374.14 |
220.90 |
0.00 |
750.00 |
xx |
xxxxxx |
16.0425 |
-82.59 |
45.99 |
-182.46 |
351.85 |
Table 2
FluidProp Name (short) | FluidProp Name (long) | Tc [°C] | Pc [bar] | MW [g/mol] | Tmin[°C] | Tmax[°C] |
1-C3H8O/C6H14 |
1-propanol/hexane |
73.1370 |
263.56 |
51.70 |
59.85 |
350.00 |
C3H6O/CH4O |
acetone/methanol |
45.0610 |
229.42 |
60.80 |
17.27 |
350.00 |
C3H6O/H2O |
acetone/water |
38.0475 |
274.75 |
97.19 |
24.57 |
750.00 |
NH3/H2O |
ammonia/water |
17.5235 |
356.74 |
244.95 |
-78.15 |
350.00 |
Ar/CH4 |
argon/methane |
27.9952 |
-103.40 |
51.36 |
-176.31 |
351.85 |
C6H6/C6H12 |
benzene/cyclohexane |
81.1380 |
277.18 |
44.03 |
10.74 |
350.00 |
C6H6/C6H12/C6H14 |
benzene/cyclohexane/hexane |
83.1540 |
255.06 |
37.53 |
10.44 |
350.00 |
C6H6/C8H10 |
benzene/ethylbenzene |
92.1410 |
322.26 |
43.90 |
57.07 |
329.85 |
C6H6/C6H14 |
benzene/hexane |
82.1460 |
252.18 |
38.03 |
9.74 |
350.00 |
C6H6/C7H8 |
benzene/toluene |
85.1275 |
304.99 |
45.42 |
19.53 |
350.00 |
C6H6/H2O |
benzene/water |
48.0645 |
235.41 |
82.87 |
19.53 |
350.00 |
C4H10/C6H14 |
butane/hexane |
72.1510 |
202.92 |
37.01 |
-5.78 |
400.00 |
C4H10/C5H12 |
butane/pentane |
65.1375 |
172.16 |
36.41 |
-62.56 |
400.00 |
C4H10/C5H12/C6H14 |
butane/pentane/hexane |
70.7483 |
196.29 |
36.78 |
-12.93 |
400.00 |
CO2/1-C4H10O |
carbon dioxide/1-butanol |
59.0650 |
205.74 |
89.84 |
124.08 |
400.00 |
CO2/C6H6 |
carbon dioxide/benzene |
61.0620 |
205.44 |
126.37 |
-126.91 |
400.00 |
CO2/C4H10 |
carbon dioxide/butane |
51.0670 |
104.44 |
73.52 |
7.87 |
400.00 |
CO2/furfural |
carbon dioxide/furfural |
70.0549 |
271.37 |
64.26 |
9.45 |
160.00 |
CO2/C6H14 |
carbon dioxide/hexane |
65.0940 |
173.24 |
85.93 |
-130.96 |
400.00 |
CO2/C5H12 |
carbon dioxide/pentane |
58.0805 |
141.19 |
74.14 |
-13.37 |
400.00 |
CO2/C3H8 |
carbon dioxide/propane |
44.0535 |
66.50 |
71.41 |
-31.57 |
400.00 |
CO2/C7H8 |
carbon dioxide/toluene |
68.0755 |
238.54 |
126.02 |
-113.77 |
400.00 |
CO2/C4H6O2/2-C4H10O |
carbon diox/vinyl ace/2-butanol |
57.2510 |
196.53 |
130.48 |
115.77 |
400.00 |
D3/D4/D5/D6 |
D3/D4/D5/D6 |
333.6955 |
339.37 |
13.65 |
106.79 |
400.00 |
D4/D3 |
D4/D3 |
259.5410 |
300.33 |
15.27 |
76.66 |
400.00 |
D4/D5 |
D4/D5 |
333.6955 |
331.89 |
12.65 |
34.83 |
400.00 |
D4/D6 |
D4/D6 |
370.7725 |
351.03 |
12.06 |
56.37 |
400.00 |
D4/CP28 |
D4/CP28 |
241.3363 |
284.78 |
24.53 |
10.23 |
700.00 |
D4/PFCH |
D4/PFCH |
298.3325 |
245.35 |
22.79 |
93.43 |
400.00 |
D5/D3 |
D5/D3 |
296.6185 |
324.16 |
15.04 |
101.75 |
400.00 |
D5/D6 |
D5/D6 |
407.8500 |
361.14 |
10.73 |
22.46 |
400.00 |
D6/D3 |
D6/D3 |
333.6955 |
348.26 |
14.78 |
126.40 |
400.00 |
C2H5OH/H2O |
ethanol/water |
32.0420 |
287.27 |
120.47 |
25.53 |
350.00 |
C8H10/C7H8 |
ethylbenzene/toluene |
99.1545 |
332.01 |
38.79 |
43.87 |
329.85 |
C7H16/C2H5OH |
heptane/ethanol |
73.1345 |
234.95 |
39.39 |
17.77 |
350.00 |
C6H14/C6H12 |
hexane/cyclohexane |
85.1700 |
255.14 |
35.15 |
12.02 |
400.00 |
i-C4H10/i-C5H12 |
isobutane/isopentane |
65.1375 |
164.40 |
36.32 |
-47.31 |
135.05 |
MD2M/MD3M |
MD2M/MD3M |
347.7665 |
343.78 |
11.07 |
28.55 |
400.00 |
MD2M/MD4M |
MD2M/MD4M |
384.8450 |
361.33 |
10.81 |
53.32 |
400.00 |
MD2M/MD5M |
MD2M/MD5M |
421.9200 |
382.49 |
10.80 |
85.69 |
400.00 |
MD2M/MD6M |
MD2M/MD6M |
459.0000 |
402.30 |
10.84 |
109.07 |
420.00 |
MD2M/PP2 |
MD2M/PP2 |
330.3713 |
280.78 |
18.52 |
78.01 |
400.00 |
MD3M/MD4M |
MD3M/MD4M |
421.9215 |
368.61 |
9.44 |
40.48 |
400.00 |
MD3M/MD5M |
MD3M/MD5M |
458.9965 |
384.69 |
9.19 |
61.50 |
400.00 |
MD3M/MD6M |
MD3M/MD6M |
496.0765 |
400.91 |
9.08 |
80.00 |
420.00 |
MD3M/PP2 |
MD3M/PP2 |
367.4478 |
308.26 |
18.82 |
109.25 |
400.00 |
MD4M/MD5M |
MD4M/MD5M |
496.0750 |
391.04 |
8.44 |
52.00 |
400.00 |
MD4M/MD6M |
MD4M/MD6M |
533.1550 |
404.45 |
8.05 |
65.61 |
420.00 |
MD4M/PP2 |
MD4M/PP2 |
404.5229 |
323.41 |
19.59 |
21.36 |
400.00 |
MD5M/MD6M |
MD5M/MD6M |
570.2300 |
408.56 |
7.25 |
58.15 |
420.00 |
MDM/MD2M |
MDM/MD2M |
273.6100 |
313.05 |
13.42 |
16.40 |
400.00 |
MDM/MD3M |
MDM/MD3M |
310.6865 |
337.55 |
13.16 |
49.38 |
400.00 |
MDM/MD4M |
MDM/MD4M |
347.7650 |
359.77 |
13.18 |
75.04 |
400.00 |
MDM/MD5M |
MDM/MD5M |
384.8400 |
386.41 |
13.37 |
113.65 |
400.00 |
MDM/MD6M |
MDM/MD6M |
421.9200 |
410.11 |
13.50 |
138.61 |
420.00 |
MDM/PP2 |
MDM/PP2 |
293.2920 |
244.53 |
18.17 |
13.59 |
400.00 |
CH4/CO2 |
methane/carbon dioxide |
30.0262 |
-22.82 |
75.86 |
-22.41 |
351.85 |
CH4O/C6H6 |
methanol/benzene |
55.0780 |
240.27 |
64.12 |
11.21 |
350.00 |
CH4O/C7H8 |
methanol/toluene |
62.0915 |
259.11 |
66.12 |
25.01 |
350.00 |
CH4O/H2O |
methanol/water |
25.0285 |
294.71 |
139.76 |
28.36 |
350.00 |
MM/PP2 |
MM/PP2 |
256.2158 |
213.71 |
19.13 |
4.58 |
400.00 |
MM/CP28 |
MM/CP28 |
174.2168 |
236.99 |
25.05 |
3.05 |
400.00 |
MM/D3 |
MM/D3 |
192.4215 |
-8888.80 |
-8888.80 |
3.05 |
400.00 |
MM/MD2M |
MM/MD2M |
236.5345 |
307.67 |
17.45 |
45.60 |
400.00 |
MM/MD3M |
MM/MD3M |
273.6110 |
340.19 |
17.63 |
86.97 |
400.00 |
MM/MD4M |
MM/MD4M |
310.6895 |
367.64 |
17.83 |
121.07 |
400.00 |
MM/MD5M |
MM/MD5M |
347.7645 |
400.43 |
18.11 |
152.88 |
400.00 |
MM/MD6M |
MM/MD6M |
384.8445 |
428.58 |
18.30 |
180.39 |
420.00 |
MM/MDM |
MM/MDM |
199.4545 |
275.45 |
17.59 |
-0.14 |
400.00 |
MM/MDM/MD2M |
MM/MDM/MD2M |
199.4554 |
279.64 |
18.54 |
27.25 |
400.00 |
MM/MDM/MD3M |
MM/MDM/MD3M |
251.3635 |
322.70 |
17.88 |
68.94 |
400.00 |
MM/MDM/MD4M |
MM/MDM/MD4M |
273.6106 |
344.01 |
18.96 |
108.97 |
400.00 |
MM/MDM/MD2M/MD3M |
MM/MDM/MD2M/MD3M |
236.5329 |
307.81 |
17.47 |
64.06 |
400.00 |
MM/MDM/MD2M/MD3M/MD4M/MD5M/MD6M |
MM/MDM/MD2M/MD3M/MD4M/MD5M/MD6M |
373.7198 |
381.54 |
13.76 |
136.02 |
420.00 |
N2/O2 |
nitrogen/oxygen |
28.8102 |
-141.35 |
37.38 |
-207.02 |
350.00 |
C5H12/C6H14 |
pentane/hexane |
79.1645 |
218.37 |
32.54 |
-29.51 |
400.00 |
C3H8/C4H10 |
propane/butane |
51.1070 |
128.43 |
42.02 |
-73.54 |
400.00 |
C3H8/C5H12 |
propane/pentane |
58.1205 |
153.15 |
43.08 |
-31.83 |
400.00 |
c8H10/c6H14 |
p-xylene/hexane |
96.1725 |
289.76 |
33.93 |
61.10 |
329.85 |
R113/C2H5OH |
R113/ethanol |
116.7245 |
-8888.80 |
-8888.80 |
-34.95 |
400.00 |
R114/C2H5OH |
R114/ethanol |
108.5045 |
121.02 |
46.57 |
60.53 |
350.00 |
R125/R134a |
R125/R134a |
111.0250 |
83.38 |
38.70 |
-41.28 |
101.06 |
R134a/R116 |
R134a/R116 |
120.0210 |
49.77 |
27.49 |
-36.92 |
101.06 |
R134a/R142b |
R134a/R142b |
101.2630 |
117.05 |
42.43 |
-60.25 |
101.06 |
R14/R23 |
R14/R23 |
79.0090 |
-26.51 |
47.42 |
-136.76 |
400.00 |
R32/R125 |
R32/R125 |
72.5853 |
74.44 |
52.60 |
-40.95 |
78.41 |
R32/R134a |
R32/R134a |
77.0270 |
90.91 |
50.03 |
-59.91 |
78.41 |
R407a |
R407A |
90.1095 |
80.43 |
44.50 |
-41.38 |
78.41 |
R410a |
R410A |
72.5853 |
72.60 |
50.38 |
-40.84 |
78.41 |
R410b |
R410B |
75.5717 |
72.04 |
49.39 |
-40.85 |
78.41 |
H2O/2-C3H8O |
water/2-propanol |
34.8474 |
275.20 |
119.37 |
52.00 |
350.00 |
H2O/2-C4H10O |
water/2-butanol |
46.0700 |
269.03 |
72.07 |
17.14 |
750.00 |