ASTM D4651-14(2020)

Standard Specification for Isobutane Thermophysical Property Tables

ABSTRACT
This specification covers the isobutane thermophysical property tables which are used in the calculation of the pressure-volume-temperature (PVT), thermodynamic, and transport properties of isobutane for process design and operations. Tables are provided for gaseous and liquid isobutane at temperatures between 135 and 600K at pressures to 35 MPa. These tables apply directly only to pure gaseous and liquid isobutane. However, it is expected that mathematical models and tables shall be useful for the thermophysical properties of mixtures containing isobutane, such as natural gas. These thermophysical property tables are: Thermophysical Properties of Coexisting Gaseous and Liquid Isobutane, in SI units and Thermophysical Properties of Isobutane, along isobars, in SI units.
SCOPE
1.1 The thermophysical property tables for isobutane are for use in the calculation of the pressure-volume-temperature (PVT), thermodynamic, and transport properties of isobutane for process design and operations. Two tables provide properties at the conditions of liquid-vapor equilibrium (saturation properties), one for liquid and one for vapor, at temperatures between 120 K and the critical point, 407.81 K. A third table provides properties at selected T, p points for the equilibrium phase at temperatures between 120 K and 570 K at pressures to 20 MPa. The tables were developed using the National Institute of Standards and Technology Standard Reference Database product REFPROP, version 9.1.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Mar-2020
• ICS: 75.160.30 - Gaseous fuels
• Technical Committee: D03 - Gaseous Fuels
• Drafting Committee: D03.08 - Thermophysical Properties

Relations

• Replaces: ASTM D4651-14 - Standard Specification for Isobutane Thermophysical Property Tables
• Effective Date: 01-Apr-2020

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D4651 −14 (Reapproved 2020)
Standard Specification for
Isobutane Thermophysical Property Tables
This standard is issued under the fixed designation D4651; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope base (REFPROP): Version 9.1.” A wide selection of units (SI
units, engineering units, chemical units) and additional prop-
1.1 The thermophysical property tables for isobutane are for
erties are available with this program.
use in the calculation of the pressure-volume-temperature
(PVT), thermodynamic, and transport properties of isobutane
3.2 These thermophysical property tables are:
for process design and operations. Two tables provide proper- 3.2.1 Thermophysical Properties of Isobutane Liquid at
ties at the conditions of liquid-vapor equilibrium (saturation
Vapor-Liquid Equilibrium, in SI units. See Table 1.
properties), one for liquid and one for vapor, at temperatures 3.2.2 Thermophysical Properties of Isobutane Vapor at
between 120 K and the critical point, 407.81 K. A third table
Vapor-Liquid Equilibrium, in SI units. See Table 2.
provides properties at selected T, p points for the equilibrium 3.2.3 Thermophysical Properties of Isobutane Along
phase at temperatures between 120 K and 570 K at pressures to
Isobars, in SI units. See Table 3.
20MPa.ThetablesweredevelopedusingtheNationalInstitute
3.3 The symbols are:
of Standards and Technology Standard Reference Database
T, temperature (K)
product REFPROP, version 9.1. -1
ρ, molar density (mol·L )
-1
1.2 The values stated in SI units are to be regarded as
H, molar enthalpy (J·mol )
-1 -1
standard. No other units of measurement are included in this
S, molar entropy (J·K ·mol )
-1 -1
standard.
C , constant volume molar heat capacity (J·K ·mol )
v
-1 -1
C , constant pressure molar heat capacity (J·K ·mol )
1.3 This standard does not purport to address all of the p
-1
c, speed of sound (m·s )
safety concerns, if any, associated with its use. It is the
η, viscosity (µPa·s)
responsibility of the user of this standard to establish appro-
-1 -1
λ, thermal conductivity (mW·m ·K )
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
3.4 The tabulated thermophysical properties are:
-1
1.4 This international standard was developed in accor-
ρ, molar density (mol·L )
dance with internationally recognized principles on standard- -1
H, molar enthalpy (J·mol )
ization established in the Decision on Principles for the -1 -1
S, molar entropy (J·K ·mol )
Development of International Standards, Guides and Recom- -1 -1
C , constant volume molar heat capacity (J·K ·mol )
v
mendations issued by the World Trade Organization Technical -1 -1
C , constant pressure molar heat capacity (J·K ·mol )
p
Barriers to Trade (TBT) Committee.
-1
c, speed of sound (m·s )
η, viscosity (µPa·s)
2. Applicability
-1 -1
λ, thermal conductivity (mW·m ·K )
2.1 These tables apply directly only to pure isobutane. They
may also be used in mathematical models and tables for the
4. Additional Information
thermophysical properties of mixtures containing isobutane.
4.1 Reference state properties are required to calculate the
3. Tables
thermodynamic properties enthalpy and entropy from an equa-
tion of state formulation. The reference state properties used
3.1 These tables were produced by equations from a com-
are those specified by the International Institute of Refrigera-
puter package, “NIST Standard Reference Database 23; Ref-
tion (IIR): enthalpy,H = 200 J/g, and entropy,S = 1 J/(g·K), for
erence Fluid Thermodynamic and Transport Properties Data-
the saturated liquid at 273.15K (0 °C).
4.2 The molar mass of isobutane is 58.122 g/mol.
This specification is under the jurisdiction of ASTM Committee D03 on
Gaseous Fuels and is the direct responsibility of Subcommittee D03.08 on
Thermophysical Properties.
Current edition approved April 1, 2020. Published May 2020. Originally
approved in 1987. Last previous edition approved in 2014 as D4651 – 14. DOI: Available from Standard Reference Data, National Institute of Standards and
10.1520/D4651-14R20. Technology (NIST), 100 Bureau Drive, Stop 3460, Gaithersburg, MD 20899.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D4651 − 14 (2020)
TABLE 1 Thermophysical Properties of Isobutane Liquid at Vapor-Liquid Equilibrium
TP ρ HS C C c ηλ
v p
-1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
K MPa mol·l J·mol J·mol ·K J·mol ·K J·mol ·K m·s µPa·s mW·m ·K
120 1.0633E-07 12.636 -5912.6 -34.216 69.001 99.308 1945.4 6055.8 156.73
122 1.6734E-07 12.603 -5713.6 -32.571 69.251 99.681 1928.5 5441.0 156.30
124 2.5915E-07 12.571 -5513.9 -30.948 69.501 100.06 1911.9 4910.8 155.85
126 3.9524E-07 12.538 -5313.4 -29.344 69.752 100.43 1895.5 4450.9 155.38
128 5.9407E-07 12.506 -5112.1 -27.759 70.004 100.81 1879.3 4049.9 154.89
130 8.8064E-07 12.473 -4910.1 -26.193 70.255 101.18 1863.4 3698.4 154.39
132 1.2883E-06 12.441 -4707.4 -24.646 70.505 101.56 1847.7 3389.0 153.86
134 1.8611E-06 12.408 -4503.9 -23.116 70.754 101.93 1832.2 3115.4 153.32
136 2.6564E-06 12.376 -4299.7 -21.603 71.003 102.30 1816.9 2872.5 152.76
138 3.7483E-06 12.343 -4094.7 -20.107 71.250 102.68 1801.7 2656.0 152.19
140 5.2314E-06 12.311 -3889.0 -18.627 71.497 103.05 1786.8 2462.5 151.60
142 7.2252E-06 12.278 -3682.5 -17.162 71.743 103.42 1772.0 2288.8 150.99
144 9.8793E-06 12.245 -3475.3 -15.713 71.988 103.79 1757.4 2132.5 150.37
146 1.3379E-05 12.213 -3267.4 -14.279 72.233 104.16 1742.9 1991.3 149.74
148 1.7953E-05 12.180 -3058.7 -12.859 72.477 104.53 1728.6 1863.6 149.09
150 2.3880E-05 12.147 -2849.3 -11.454 72.720 104.89 1714.4 1747.6 148.43
152 3.1496E-05 12.115 -2639.1 -10.062 72.964 105.26 1700.3 1642.0 147.75
154 4.1206E-05 12.082 -2428.2 -8.6838 73.207 105.63 1686.4 1545.6 147.07
156 5.3493E-05 12.049 -2216.6 -7.3185 73.451 106.00 1672.6 1457.5 146.37
158 6.8925E-05 12.016 -2004.2 -5.9659 73.695 106.36 1658.9 1376.7 145.67
160 8.8176E-05 11.984 -1791.1 -4.6257 73.940 106.73 1645.3 1302.4 144.95
162 0.00011203 11.951 -1577.3 -3.2975 74.186 107.10 1631.8 1234.1 144.22
164 0.00014139 11.918 -1362.8 -1.9812 74.432 107.47 1618.3 1171.0 143.48
166 0.00017732 11.885 -1147.5 -0.67634 74.679 107.83 1605.0 1112.6 142.74
168 0.00022101 11.852 -931.41 0.61730 74.928 108.20 1591.8 1058.6 141.98
170 0.00027386 11.819 -714.63 1.9000 75.178 108.57 1578.6 1008.4 141.22
172 0.00033740 11.786 -497.11 3.1721 75.430 108.95 1565.6 961.80 140.45
174 0.00041343 11.752 -278.84 4.4337 75.684 109.32 1552.6 918.37 139.67
176 0.00050391 11.719 -59.816 5.6852 75.939 109.69 1539.6 877.85 138.88
178 0.00061107 11.686 159.96 6.9268 76.197 110.07 1526.8 839.98 138.09
180 0.00073738 11.653 380.48 8.1588 76.456 110.45 1514.0 804.54 137.30
182 0.00088560 11.619 601.77 9.3813 76.718 110.83 1501.3 771.33 136.49
184 0.0010588 11.586 823.82 10.595 76.983 111.21 1488.6 740.15 135.68
186 0.0012602 11.552 1046.6 11.799 77.250 111.60 1476.0 710.84 134.87
188 0.0014935 11.519 1270.2 12.995 77.519 111.98 1463.4 683.26 134.05
190 0.0017628 11.485 1494.6 14.182 77.792 112.37 1450.9 657.25 133.23
192 0.0020724 11.451 1719.8 15.360 78.067 112.77 1438.5 632.72 132.40
194 0.0024270 11.418 1945.7 16.531 78.345 113.16 1426.1 609.54 131.57
196 0.0028316 11.384 2172.5 17.694 78.627 113.56 1413.7 587.61 130.73
198 0.0032918 11.350 2400.0 18.849 78.911 113.96 1401.4 566.84 129.90
200 0.0038135 11.316 2628.4 19.996 79.199 114.37 1389.1 547.15 129.06
202 0.0044031 11.282 2857.6 21.136 79.490 114.78 1376.9 528.46 128.21
204 0.0050671 11.248 3087.6 22.269 79.785 115.19 1364.7 510.71 127.37
206 0.0058130 11.213 3318.5 23.394 80.082 115.61 1352.6 493.83 126.52
208 0.0066482 11.179 3550.1 24.513 80.384 116.03 1340.5 477.76 125.67
210 0.0075808 11.145 3782.7 25.626 80.689 116.46 1328.4 462.45 124.82
212 0.0086196 11.110 4016.1 26.731 80.998 116.88 1316.3 447.85 123.97
214 0.0097734 11.075 4250.4 27.831 81.310 117.32 1304.4 433.92 123.12
216 0.011052 11.041 4485.5 28.924 81.626 117.76 1292.4 420.62 122.27
218 0.012465 11.006 4721.5 30.011 81.946 118.20 1280.5 407.90 121.41
220 0.014023 10.971 4958.5 31.092 82.269 118.65 1268.6 395.73 120.56
222 0.015736 10.936 5196.3 32.168 82.596 119.10 1256.7 384.08 119.71
224 0.017618 10.901 5435.1 33.238 82.927 119.55 1244.9 372.92 118.86
226 0.019678 10.865 5674.8 34.302 83.262 120.02 1233.0 362.23 118.02
228 0.021930 10.830 5915.4 35.361 83.601 120.48 1221.3 351.97 117.17
230 0.024387 10.794 6157.0 36.415 83.944 120.96 1209.5 342.12 116.32
232 0.027061 10.759 6399.5 37.464 84.290 121.43 1197.8 332.66 115.47
234 0.029967 10.723 6643.0 38.508 84.640 121.92 1186.1 323.57 114.63
236 0.033118 10.687 6887.5 39.547 84.995 122.41 1174.4 314.83 113.79
238 0.036530 10.651 7133.0 40.582 85.353 122.90 1162.8 306.42 112.94
240 0.040218 10.615 7379.5 41.612 85.714 123.40 1151.2 298.32 112.10
242 0.044196 10.578 7627.1 42.637 86.080 123.91 1139.6 290.53 111.27
244 0.048482 10.542 7875.6 43.658 86.450 124.42 1128.0 283.01 110.43
246 0.053092 10.505 8125.2 44.675 86.823 124.94 1116.4 275.77 109.60
248 0.058042 10.468 8375.9 45.688 87.200 125.46 1104.9 268.78 108.77
250 0.063350 10.431 8627.7 46.697 87.581 126.00 1093.4 262.04 107.94
252 0.069033 10.394 8880.5 47.703 87.966 126.54 1081.9 255.54 107.12
254 0.075109 10.357 9134.4 48.704 88.354 127.08 1070.4 249.25 106.30
256 0.081597 10.319 9389.5 49.702 88.746 127.63 1059.0 243.18 105.48
258 0.088516 10.281 9645.6 50.696 89.142 128.19 1047.5 237.31 104.67
260 0.095885 10.243 9903.0 51.687 89.541 128.76 1036.1 231.63 103.86
262 0.10372 10.205 10161 52.674 89.944 129.33 1024.7 226.14 103.05
264 0.11205 10.167 10421 53.658 90.351 129.91 1013.3 220.83 102.25
266 0.12089 10.128 10682 54.639 90.761 130.50 1002.0 215.68 101.45
D4651 − 14 (2020)
TABLE 1 Continued
TP ρ HS C C c ηλ
v p
-1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
K MPa mol·l J·mol J·mol ·K J·mol ·K J·mol ·K m·s µPa·s mW·m ·K
268 0.13025 10.090 10944 55.617 91.175 131.10 990.63 210.70 100.66
270 0.14017 10.051 11207 56.592 91.592 131.70 979.29 205.87 99.867
272 0.15066 10.012 11472 57.564 92.012 132.32 967.96 201.19 99.082
274 0.16174 9.9721 11738 58.534 92.436 132.94 956.65 196.65 98.301
276 0.17344 9.9324 12005 59.501 92.864 133.57 945.35 192.25 97.524
278 0.18577 9.8925 12273 60.465 93.294 134.21 934.06 187.98 96.753
280 0.19876 9.8523 12543 61.427 93.728 134.86 922.77 183.83 95.986
282 0.21243 9.8118 12813 62.386 94.165 135.52 911.50 179.81 95.224
284 0.22681 9.7710 13086 63.343 94.606 136.19 900.23 175.89 94.467
286 0.24192 9.7300 13359 64.298 95.050 136.87 888.97 172.09 93.715
288 0.25777 9.6887 13635 65.250 95.496 137.56 877.72 168.40 92.969
290 0.27440 9.6470 13911 66.201 95.946 138.26 866.47 164.80 92.227
292 0.29183 9.6051 14189 67.150 96.400 138.97 855.22 161.31 91.491
294 0.31008 9.5628 14468 68.096 96.856 139.70 843.98 157.91 90.761
296 0.32917 9.5202 14749 69.042 97.315 140.43 832.74 154.59 90.036
298 0.34914 9.4773 15031 69.985 97.778 141.18 821.50 151.37 89.316
300 0.37000 9.4339 15315 70.927 98.243 141.94 810.25 148.22 88.602
302 0.39177 9.3902 15600 71.867 98.711 142.72 799.01 145.16 87.894
304 0.41450 9.3462 15887 72.806 99.183 143.51 787.76 142.17 87.191
306 0.43819 9.3017 16176 73.743 99.657 144.32 776.50 139.26 86.494
308 0.46288 9.2568 16466 74.680 100.13 145.14 765.24 136.41 85.803
310 0.48858 9.2114 16758 75.615 100.62 145.98 753.97 133.64 85.118
312 0.51534 9.1657 17051 76.549 101.10 146.84 742.69 130.92 84.439
314 0.54317 9.1194 17346 77.482 101.59 147.71 731.40 128.27 83.765
316 0.57209 9.0727 17643 78.414 102.07 148.61 720.10 125.68 83.098
318 0.60215 9.0255 17942 79.346 102.57 149.52 708.78 123.15 82.437
320 0.63335 8.9777 18242 80.276 103.06 150.46 697.45 120.67 81.781
322 0.66573 8.9295 18544 81.207 103.56 151.42 686.10 118.24 81.132
324 0.69932 8.8806 18848 82.137 104.06 152.40 674.72 115.86 80.489
326 0.73415 8.8312 19154 83.066 104.57 153.41 663.33 113.53 79.851
328 0.77023 8.7811 19462 83.995 105.08 154.45 651.91 111.25 79.220
330 0.80761 8.7304 19772 84.925 105.59 155.52 640.46 109.01 78.595
332 0.84630 8.6790 20084 85.854 106.11 156.62 628.99 106.81 77.976
334 0.88635 8.6270 20398 86.783 106.63 157.75 617.48 104.65 77.363
336 0.92776 8.5741 20715 87.713 107.15 158.92 605.94 102.53 76.757
338 0.97059 8.5206 21033 88.643 107.68 160.13 594.36 100.45 76.156
340 1.0148 8.4662 21354 89.574 108.21 161.39 582.74 98.394 75.561
342 1.0606 8.4109 21677 90.505 108.74 162.69 571.08 96.375 74.973
344 1.1078 8.3548 22002 91.438 109.28 164.04 559.37 94.387 74.390
346 1.1565 8.2977 22330 92.371 109.83 165.44 547.62 92.427 73.814
348 1.2068 8.2396 22661 93.306 110.38 166.91 535.81 90.495 73.243
350 1.2587 8.1805 22994 94.242 110.93 168.44 523.94 88.587 72.679
352 1.3123 8.1202 23330 95.180 111.49 170.04 512.02 86.704 72.120
354 1.3674 8.0588 23668 96.120 112.06 171.73 500.02 84.842 71.567
356 1.4243 7.9961 24010 97.062 112.63 173.50 487.96 83.000 71.020
358 1.4829 7.9321 24354 98.007 113.21 175.38 475.82 81.177 70.479
360 1.5433 7.8666 24702 98.954 113.80 177.37 463.60 79.371 69.944
362 1.6054 7.7996 25053 99.904 114.39 179.48 451.29 77.580 69.415
364 1.6694 7.7310 25408 100.86 114.99 181.74 438.89 75.802 68.891
366 1.7352 7.6606 25766 101.82 115.60 184.15 426.38 74.034 68.374
368 1.8030 7.5883 26128 102.78 116.22 186.76 413.76 72.277 67.862
370 1.8727 7.5139 26494 103.75 116.86 189.58 401.01 70.526 67.356
372 1.9444 7.4372 26864 104.72 117.50 192.66 388.14 68.779 66.856
374 2.0181 7.3580 27239 105.7 118.17 196.03 375.12 67.036 66.363
376 2.0939 7.2762 27619 106.68 118.84 199.74 361.94 65.292 65.877
378 2.1718 7.1913 28005 107.68 119.54 203.88 348.59 63.544 65.398
380 2.2519 7.1031 28396 108.68 120.26 208.53 335.05 61.791 64.926
382 2.3343 7.0111 28794 109.69 121.01 213.80 321.32 60.027 64.465
384 2.4189 6.9149 29198 110.72 121.79 219.85 307.36 58.248 64.014
386 2.5058 6.8138 29611 111.76 122.62 226.90 293.15 56.450 63.577
388 2.5951 6.7072 30032 112.81 123.49 235.25 278.69 54.626 63.158
390 2.6869 6.5941 30464 113.88 124.42 245.34 263.93 52.770 62.764
392 2.7812 6.4732 30907 114.98 125.42 257.82 248.86 50.870 62.403
394 2.8782 6.3430 31365 116.11 126.52 273.75 233.42 48.915 62.093
396 2.9778 6.2012 31840 117.27 127.74 294.88 217.58 46.887 61.861
398 3.0802 6.0444 32336 118.48 129.14 324.44 201.26 44.761 61.762
...