1、Designation: D4651 14Standard Specification forIsobutane Thermophysical Property Tables1This standard is issued under the fixed designation D4651; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number
2、in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 The thermophysical property tables for isobutane are foruse in the calculation of the pressure-volume-temperature(PVT), thermodynamic, and tra
3、nsport properties of isobutanefor process design and operations. Two tables provide proper-ties at the conditions of liquid-vapor equilibrium (saturationproperties), one for liquid and one for vapor, at temperaturesbetween 120 K and the critical point, 407.81 K. A third tableprovides properties at s
4、elected T, p points for the equilibriumphase at temperatures between 120 K and 570 K at pressures to20 MPa. The tables were developed using the National Instituteof Standards and Technology Standard Reference Databaseproduct REFPROP, version 9.1.1.2 The values stated in SI units are to be regarded a
5、sstandard. No other units of measurement are included in thisstandard.2. Applicability2.1 These tables apply directly only to pure isobutane. Theymay also be used in mathematical models and tables for thethermophysical properties of mixtures containing isobutane.3. Tables3.1 These tables were produc
6、ed by equations from a com-puter package, “NIST Standard Reference Database 23; Ref-erence Fluid Thermodynamic and Transport Properties Data-base (REFPROP): Version 9.1.”2A wide selection of units (SIunits, engineering units, chemical units) and additional prop-erties are available with this program
7、.3.2 These thermophysical property tables are:3.2.1 Thermophysical Properties of Isobutane Liquid atVapor-Liquid Equilibrium, in SI units. See Table 1.3.2.2 Thermophysical Properties of Isobutane Vapor atVapor-Liquid Equilibrium, in SI units. See Table 2.3.2.3 Thermophysical Properties of Isobutane
8、AlongIsobars, in SI units. See Table 3.3.3 The symbols are:T, temperature (K), molar density (molL-1)H, molar enthalpy (Jmol-1)S, molar entropy (JK-1mol-1)Cv, constant volume molar heat capacity (JK-1mol-1)Cp, constant pressure molar heat capacity (JK-1mol-1)c, speed of sound (ms-1), viscosity (Pas)
9、, thermal conductivity (mWm-1K-1)3.4 The tabulated thermophysical properties are:, molar density (molL-1)H, molar enthalpy (Jmol-1)S, molar entropy (JK-1mol-1)Cv, constant volume molar heat capacity (JK-1mol-1)Cp, constant pressure molar heat capacity (JK-1mol-1)c, speed of sound (ms-1), viscosity (
10、Pas), thermal conductivity (mWm-1K-1)4. Additional Information4.1 Reference state properties are required to calculate thethermodynamic properties enthalpy and entropy from an equa-tion of state formulation. The reference state properties usedare those specified by the International Institute of Ref
11、rigera-tion (IIR): enthalpy, H = 200 J/g, and entropy, S = 1 J/(gK), forthe saturated liquid at 273.15K (0C).4.2 The molar mass of isobutane is 58.122 g/mol.5. Keywords5.1 isobutane; isobutane gas tables; natural gas; thermody-namic properties of isobutane; transport properties of isobu-tane; 2-meth
12、ylpropane1This specification is under the jurisdiction of ASTM Committee D03 onGaseous Fuels and is the direct responsibility of Subcommittee D03.08 onThermophysical Properties.Current edition approved June 1, 2014. Published July 2014. Originally approvedin 1987. Last previous edition approved in 2
13、008 as D4651 08. DOI: 10.1520/D4651-14.2Available from Standard Reference Data, National Institute of Standards andTechnology (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 States1
14、TABLE 1 Thermophysical Properties of Isobutane Liquid at Vapor-Liquid EquilibriumTP HSCvCpc K MPa moll-1Jmol-1Jmol-1K-1Jmol-1K-1Jmol-1K-1ms-1Pas mWm-1K-1120 1.0633E-07 12.636 -5912.6 -34.216 69.001 99.308 1945.4 6055.8 156.73122 1.6734E-07 12.603 -5713.6 -32.571 69.251 99.681 1928.5 5441.0 156.30124
15、 2.5915E-07 12.571 -5513.9 -30.948 69.501 100.06 1911.9 4910.8 155.85126 3.9524E-07 12.538 -5313.4 -29.344 69.752 100.43 1895.5 4450.9 155.38128 5.9407E-07 12.506 -5112.1 -27.759 70.004 100.81 1879.3 4049.9 154.89130 8.8064E-07 12.473 -4910.1 -26.193 70.255 101.18 1863.4 3698.4 154.39132 1.2883E-06
16、12.441 -4707.4 -24.646 70.505 101.56 1847.7 3389.0 153.86134 1.8611E-06 12.408 -4503.9 -23.116 70.754 101.93 1832.2 3115.4 153.32136 2.6564E-06 12.376 -4299.7 -21.603 71.003 102.30 1816.9 2872.5 152.76138 3.7483E-06 12.343 -4094.7 -20.107 71.250 102.68 1801.7 2656.0 152.19140 5.2314E-06 12.311 -3889
17、.0 -18.627 71.497 103.05 1786.8 2462.5 151.60142 7.2252E-06 12.278 -3682.5 -17.162 71.743 103.42 1772.0 2288.8 150.99144 9.8793E-06 12.245 -3475.3 -15.713 71.988 103.79 1757.4 2132.5 150.37146 1.3379E-05 12.213 -3267.4 -14.279 72.233 104.16 1742.9 1991.3 149.74148 1.7953E-05 12.180 -3058.7 -12.859 7
18、2.477 104.53 1728.6 1863.6 149.09150 2.3880E-05 12.147 -2849.3 -11.454 72.720 104.89 1714.4 1747.6 148.43152 3.1496E-05 12.115 -2639.1 -10.062 72.964 105.26 1700.3 1642.0 147.75154 4.1206E-05 12.082 -2428.2 -8.6838 73.207 105.63 1686.4 1545.6 147.07156 5.3493E-05 12.049 -2216.6 -7.3185 73.451 106.00
19、 1672.6 1457.5 146.37158 6.8925E-05 12.016 -2004.2 -5.9659 73.695 106.36 1658.9 1376.7 145.67160 8.8176E-05 11.984 -1791.1 -4.6257 73.940 106.73 1645.3 1302.4 144.95162 0.00011203 11.951 -1577.3 -3.2975 74.186 107.10 1631.8 1234.1 144.22164 0.00014139 11.918 -1362.8 -1.9812 74.432 107.47 1618.3 1171
20、.0 143.48166 0.00017732 11.885 -1147.5 -0.67634 74.679 107.83 1605.0 1112.6 142.74168 0.00022101 11.852 -931.41 0.61730 74.928 108.20 1591.8 1058.6 141.98170 0.00027386 11.819 -714.63 1.9000 75.178 108.57 1578.6 1008.4 141.22172 0.00033740 11.786 -497.11 3.1721 75.430 108.95 1565.6 961.80 140.45174
21、0.00041343 11.752 -278.84 4.4337 75.684 109.32 1552.6 918.37 139.67176 0.00050391 11.719 -59.816 5.6852 75.939 109.69 1539.6 877.85 138.88178 0.00061107 11.686 159.96 6.9268 76.197 110.07 1526.8 839.98 138.09180 0.00073738 11.653 380.48 8.1588 76.456 110.45 1514.0 804.54 137.30182 0.00088560 11.619
22、601.77 9.3813 76.718 110.83 1501.3 771.33 136.49184 0.0010588 11.586 823.82 10.595 76.983 111.21 1488.6 740.15 135.68186 0.0012602 11.552 1046.6 11.799 77.250 111.60 1476.0 710.84 134.87188 0.0014935 11.519 1270.2 12.995 77.519 111.98 1463.4 683.26 134.05190 0.0017628 11.485 1494.6 14.182 77.792 112
23、.37 1450.9 657.25 133.23192 0.0020724 11.451 1719.8 15.360 78.067 112.77 1438.5 632.72 132.40194 0.0024270 11.418 1945.7 16.531 78.345 113.16 1426.1 609.54 131.57196 0.0028316 11.384 2172.5 17.694 78.627 113.56 1413.7 587.61 130.73198 0.0032918 11.350 2400.0 18.849 78.911 113.96 1401.4 566.84 129.90
24、200 0.0038135 11.316 2628.4 19.996 79.199 114.37 1389.1 547.15 129.06202 0.0044031 11.282 2857.6 21.136 79.490 114.78 1376.9 528.46 128.21204 0.0050671 11.248 3087.6 22.269 79.785 115.19 1364.7 510.71 127.37206 0.0058130 11.213 3318.5 23.394 80.082 115.61 1352.6 493.83 126.52208 0.0066482 11.179 355
25、0.1 24.513 80.384 116.03 1340.5 477.76 125.67210 0.0075808 11.145 3782.7 25.626 80.689 116.46 1328.4 462.45 124.82212 0.0086196 11.110 4016.1 26.731 80.998 116.88 1316.3 447.85 123.97214 0.0097734 11.075 4250.4 27.831 81.310 117.32 1304.4 433.92 123.12216 0.011052 11.041 4485.5 28.924 81.626 117.76
26、1292.4 420.62 122.27218 0.012465 11.006 4721.5 30.011 81.946 118.20 1280.5 407.90 121.41220 0.014023 10.971 4958.5 31.092 82.269 118.65 1268.6 395.73 120.56222 0.015736 10.936 5196.3 32.168 82.596 119.10 1256.7 384.08 119.71224 0.017618 10.901 5435.1 33.238 82.927 119.55 1244.9 372.92 118.86226 0.01
27、9678 10.865 5674.8 34.302 83.262 120.02 1233.0 362.23 118.02228 0.021930 10.830 5915.4 35.361 83.601 120.48 1221.3 351.97 117.17230 0.024387 10.794 6157.0 36.415 83.944 120.96 1209.5 342.12 116.32232 0.027061 10.759 6399.5 37.464 84.290 121.43 1197.8 332.66 115.47234 0.029967 10.723 6643.0 38.508 84
28、.640 121.92 1186.1 323.57 114.63236 0.033118 10.687 6887.5 39.547 84.995 122.41 1174.4 314.83 113.79238 0.036530 10.651 7133.0 40.582 85.353 122.90 1162.8 306.42 112.94240 0.040218 10.615 7379.5 41.612 85.714 123.40 1151.2 298.32 112.10242 0.044196 10.578 7627.1 42.637 86.080 123.91 1139.6 290.53 11
29、1.27244 0.048482 10.542 7875.6 43.658 86.450 124.42 1128.0 283.01 110.43246 0.053092 10.505 8125.2 44.675 86.823 124.94 1116.4 275.77 109.60248 0.058042 10.468 8375.9 45.688 87.200 125.46 1104.9 268.78 108.77250 0.063350 10.431 8627.7 46.697 87.581 126.00 1093.4 262.04 107.94252 0.069033 10.394 8880
30、.5 47.703 87.966 126.54 1081.9 255.54 107.12254 0.075109 10.357 9134.4 48.704 88.354 127.08 1070.4 249.25 106.30256 0.081597 10.319 9389.5 49.702 88.746 127.63 1059.0 243.18 105.48258 0.088516 10.281 9645.6 50.696 89.142 128.19 1047.5 237.31 104.67260 0.095885 10.243 9903.0 51.687 89.541 128.76 1036
31、.1 231.63 103.86262 0.10372 10.205 10161 52.674 89.944 129.33 1024.7 226.14 103.05264 0.11205 10.167 10421 53.658 90.351 129.91 1013.3 220.83 102.25266 0.12089 10.128 10682 54.639 90.761 130.50 1002.0 215.68 101.45D4651 142TABLE 1 ContinuedTP HSCvCpc K MPa moll-1Jmol-1Jmol-1K-1Jmol-1K-1Jmol-1K-1ms-1
32、Pas mWm-1K-1268 0.13025 10.090 10944 55.617 91.175 131.10 990.63 210.70 100.66270 0.14017 10.051 11207 56.592 91.592 131.70 979.29 205.87 99.867272 0.15066 10.012 11472 57.564 92.012 132.32 967.96 201.19 99.082274 0.16174 9.9721 11738 58.534 92.436 132.94 956.65 196.65 98.301276 0.17344 9.9324 12005
33、 59.501 92.864 133.57 945.35 192.25 97.524278 0.18577 9.8925 12273 60.465 93.294 134.21 934.06 187.98 96.753280 0.19876 9.8523 12543 61.427 93.728 134.86 922.77 183.83 95.986282 0.21243 9.8118 12813 62.386 94.165 135.52 911.50 179.81 95.224284 0.22681 9.7710 13086 63.343 94.606 136.19 900.23 175.89
34、94.467286 0.24192 9.7300 13359 64.298 95.050 136.87 888.97 172.09 93.715288 0.25777 9.6887 13635 65.250 95.496 137.56 877.72 168.40 92.969290 0.27440 9.6470 13911 66.201 95.946 138.26 866.47 164.80 92.227292 0.29183 9.6051 14189 67.150 96.400 138.97 855.22 161.31 91.491294 0.31008 9.5628 14468 68.09
35、6 96.856 139.70 843.98 157.91 90.761296 0.32917 9.5202 14749 69.042 97.315 140.43 832.74 154.59 90.036298 0.34914 9.4773 15031 69.985 97.778 141.18 821.50 151.37 89.316300 0.37000 9.4339 15315 70.927 98.243 141.94 810.25 148.22 88.602302 0.39177 9.3902 15600 71.867 98.711 142.72 799.01 145.16 87.894
36、304 0.41450 9.3462 15887 72.806 99.183 143.51 787.76 142.17 87.191306 0.43819 9.3017 16176 73.743 99.657 144.32 776.50 139.26 86.494308 0.46288 9.2568 16466 74.680 100.13 145.14 765.24 136.41 85.803310 0.48858 9.2114 16758 75.615 100.62 145.98 753.97 133.64 85.118312 0.51534 9.1657 17051 76.549 101.
37、10 146.84 742.69 130.92 84.439314 0.54317 9.1194 17346 77.482 101.59 147.71 731.40 128.27 83.765316 0.57209 9.0727 17643 78.414 102.07 148.61 720.10 125.68 83.098318 0.60215 9.0255 17942 79.346 102.57 149.52 708.78 123.15 82.437320 0.63335 8.9777 18242 80.276 103.06 150.46 697.45 120.67 81.781322 0.
38、66573 8.9295 18544 81.207 103.56 151.42 686.10 118.24 81.132324 0.69932 8.8806 18848 82.137 104.06 152.40 674.72 115.86 80.489326 0.73415 8.8312 19154 83.066 104.57 153.41 663.33 113.53 79.851328 0.77023 8.7811 19462 83.995 105.08 154.45 651.91 111.25 79.220330 0.80761 8.7304 19772 84.925 105.59 155
39、.52 640.46 109.01 78.595332 0.84630 8.6790 20084 85.854 106.11 156.62 628.99 106.81 77.976334 0.88635 8.6270 20398 86.783 106.63 157.75 617.48 104.65 77.363336 0.92776 8.5741 20715 87.713 107.15 158.92 605.94 102.53 76.757338 0.97059 8.5206 21033 88.643 107.68 160.13 594.36 100.45 76.156340 1.0148 8
40、.4662 21354 89.574 108.21 161.39 582.74 98.394 75.561342 1.0606 8.4109 21677 90.505 108.74 162.69 571.08 96.375 74.973344 1.1078 8.3548 22002 91.438 109.28 164.04 559.37 94.387 74.390346 1.1565 8.2977 22330 92.371 109.83 165.44 547.62 92.427 73.814348 1.2068 8.2396 22661 93.306 110.38 166.91 535.81
41、90.495 73.243350 1.2587 8.1805 22994 94.242 110.93 168.44 523.94 88.587 72.679352 1.3123 8.1202 23330 95.180 111.49 170.04 512.02 86.704 72.120354 1.3674 8.0588 23668 96.120 112.06 171.73 500.02 84.842 71.567356 1.4243 7.9961 24010 97.062 112.63 173.50 487.96 83.000 71.020358 1.4829 7.9321 24354 98.
42、007 113.21 175.38 475.82 81.177 70.479360 1.5433 7.8666 24702 98.954 113.80 177.37 463.60 79.371 69.944362 1.6054 7.7996 25053 99.904 114.39 179.48 451.29 77.580 69.415364 1.6694 7.7310 25408 100.86 114.99 181.74 438.89 75.802 68.891366 1.7352 7.6606 25766 101.82 115.60 184.15 426.38 74.034 68.37436
43、8 1.8030 7.5883 26128 102.78 116.22 186.76 413.76 72.277 67.862370 1.8727 7.5139 26494 103.75 116.86 189.58 401.01 70.526 67.356372 1.9444 7.4372 26864 104.72 117.50 192.66 388.14 68.779 66.856374 2.0181 7.3580 27239 105.7 118.17 196.03 375.12 67.036 66.363376 2.0939 7.2762 27619 106.68 118.84 199.7
44、4 361.94 65.292 65.877378 2.1718 7.1913 28005 107.68 119.54 203.88 348.59 63.544 65.398380 2.2519 7.1031 28396 108.68 120.26 208.53 335.05 61.791 64.926382 2.3343 7.0111 28794 109.69 121.01 213.80 321.32 60.027 64.465384 2.4189 6.9149 29198 110.72 121.79 219.85 307.36 58.248 64.014386 2.5058 6.8138
45、29611 111.76 122.62 226.90 293.15 56.450 63.577388 2.5951 6.7072 30032 112.81 123.49 235.25 278.69 54.626 63.158390 2.6869 6.5941 30464 113.88 124.42 245.34 263.93 52.770 62.764392 2.7812 6.4732 30907 114.98 125.42 257.82 248.86 50.870 62.403394 2.8782 6.3430 31365 116.11 126.52 273.75 233.42 48.915
46、 62.093396 2.9778 6.2012 31840 117.27 127.74 294.88 217.58 46.887 61.861398 3.0802 6.0444 32336 118.48 129.14 324.44 201.26 44.761 61.762400 3.1856 5.8674 32862 119.75 130.78 369.01 184.38 42.498 61.898402 3.2940 5.6611 33429 121.12 132.80 444.47 166.79 40.030 62.501404 3.4057 5.4067 34065 122.65 13
47、5.47 601.19 148.23 37.215 64.151406 3.5210 5.0501 34847 124.52 139.62 1125.7 128.12 33.651 68.999407.81 3.6284 4.0403 36583 128.73 152.07 329210 106.84 25.500 348.88D4651 143TABLE 2 Thermophysical Properties of Isobutane Vapor at Vapor-Liquid EquilibriumTP HSCvCpc K MPa moll-1Jmol-1Jmol-1K-1Jmol-1K-
48、1Jmol-1K-1ms-1Pas mWm-1K-1120 1.0633E-07 1.0657E-07 21733 196.17 44.496 52.811 142.74 3.0131 2.6257122 1.6734E-07 1.6497E-07 21840 193.27 45.023 53.338 143.79 3.0658 2.7408124 2.5915E-07 2.5136E-07 21947 190.51 45.546 53.861 144.83 3.1185 2.8569126 3.9524E-07 3.7727E-07 22055 187.87 46.064 54.379 14
49、5.87 3.1711 2.9740128 5.9407E-07 5.5821E-07 22164 185.34 46.578 54.892 146.90 3.2237 3.0922130 8.8064E-07 8.1474E-07 22275 182.92 47.087 55.402 147.92 3.2763 3.2114132 1.2883E-06 1.1738E-06 22386 180.61 47.592 55.907 148.93 3.3288 3.3317134 1.8611E-06 1.6704E-06 22498 178.39 48.094 56.409 149.94 3.3813 3.4530136 2.6564E-06 2.3492E-06 22611 176.27 48.591 56.906 150.94 3.4337 3.5753138 3.7483E-06 3.2669E-06 22726 174.24 49.085 57.400 151.94 3.4860 3.6987140 5.2314E-06 4.4943E-06 22841 172.30 49.575 57
