ASTM D4651-08
(Specification)Standard Specification for Isobutane Thermophysical Property Tables
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. Tables are provided for gaseous and liquid isobutane at temperatures between 120 and 570 K at pressures to 20 MPa. One table provides properties at the conditions of liquid-vapor equilibrium (saturation properties). The other table provides properties at selected T, p points for the equilibrium phase at those conditions. The tables were developed by the National Institute of Standards and Technology from a Standard Reference Database product REFPROP, version 8.0.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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Designation:D4651 −08
StandardSpecification for
1
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 3.1.2 Thermophysical Properties of Isobutane Along
Isobars, in SI units. See Table 2.
1.1 The thermophysical property tables for isobutane are for
use in the calculation of the pressure-volume-temperature 3.2 The tabulated thermophysical properties are:
-1
(PVT), thermodynamic, and transport properties of isobutane ρ, molar density (mol·l )
-1
for process design and operations. Tables are provided for H, molar enthalpy (J·mol )
-1 -1
gaseous and liquid isobutane at temperatures between 120 and S, molar entropy (J·K ·mol )
-1 -1
570 K at pressures to 20 MPa. One table provides properties at C , constant volume molar heat capacity (J·K ·mol )
v
-1 -1
the conditions of liquid-vapor equilibrium (saturation proper- C , constant pressure molar heat capacity (J·K ·mol )
p
-1
ties). The other table provides properties at selected T, p points c, speed of sound (m·s )
for the equilibrium phase at those conditions. The tables were η, viscosity (µPa·s)
-1 -1
developed by the National Institute of Standards and Technol- λ, thermal conductivity (mW·m ·K )
ogy from a Standard Reference Database product REFPROP,
3.3 These tables were produced by equations from a com-
version 8.0.
puter package, “NIST Standard Reference Database 23; Ref-
1.2 The values stated in SI units are to be regarded as erence Fluid Thermodynamic and Transport Properties Data-
standard. No other units of measurement are included in this base (REFPROP): Version =8.0” A wide selection of units (SI
standard. units, engineering units, chemical units) is available with this
2
program.
2. Applicability
4. Additional Information
2.1 These tables apply directly only to pure gaseous isobu-
tane. However, it is expected that they may find substantial use
4.1 Reference state properties are required to calculate
in mathematical models and tables for the thermophysical certain of the thermodynamic properties (enthalpy, entropy,
properties of mixtures containing isobutane.
etc.) from an equation of state formulation. The reference state
properties used to generate the tables in this specification are:
3. Tables
enthalpy, H, and entropy, S, at 298.15 K and 0.101325 MPa
3.1 These thermophysical property tables are: (H = 17932.6 J/mol and S = 295.390 J/(mol K). The molar
mass of isobutane is 58.122 g/mol.
3.1.1 ThermophysicalPropertiesofCoexistingGaseousand
Liquid Isobutane, in SI units. See Table 1.
5. Keywords
5.1 isobutane gas tables; natural gas; thermodynamic prop-
1
This specification is under the jurisdiction of ASTM Committee D03 on
erties of isobutane; transport properties of isobutane
Gaseous Fuels and is the direct responsibility of Subcommittee D03.08 on
Thermophysical Properties.
Current edition approved Dec. 1, 2008. Published January 2009. Originally
2
approved in 1987. Last previous edition approved in 2003 as D4651 – 93 (2003). Available from Standard Reference Data, National Institute of Standards and
DOI: 10.1520/D4651-08. 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
1
---------------------- Page: 1 ----------------------
D4651−08
TABLE 1 Thermophysical Properties of Coexisting Gaseous and Liquid Isobutane
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
114 2.455E-08 12.733 -23331 110.20 68.27 98.21 1997.4 8618 157.88
114 2.455E-08 2.59E-08 4595.2 355.17 42.89 51.20 139.53 2.855 2.287
118 6.643E-08 12.668 -22937 113.60 68.75 98.94 1962.5 6774 157.1
118 6.643E-08 6.771E-08 4802.2 348.68 43.96 52.28 141.68 2.960 2.512
122 1.673E-07 12.603 -22540 116.91 69.25 99.68 1928.5 5441 156.3
122 1.673E-07 1.65E-07 5013.4 342.75 45.02 53.34 143.79 3.066 2.741
126 3.952E-07 12.538 -22140 120.14 69.75 100.43 1895.5 4451 155.4
126 3.952E-07 3.773E-07 5228.8 337.35 46.06 54.38 145.87 3.171 2.974
130 8.806E-07 12.473 -21736 123.29 70.26 101.18 1863.4 3698 154.4
130 8.806E-07 8.147E-07 5448.4 332.40 47.09 55.40 147.92 3.276 3.211
134 1.861E-06 12.408 -21330 126.36 70.75 101.93 1832.2 3115 153.3
134 1.861E-06 1.67E-06 5672.0 327.87 48.09 56.41 149.94 3.381 3.453
138 3.748E-06 12.343 -20921 129.37 71.25 102.68 1801.7 2656 152.9
138 3.748E-06 3.267E-06 5899.6 323.72 49.09 57.40 151.94 3.486 3.699
142 7.225E-06 12.278 -20509 132.32 71.74 103.42 1772.0
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D4651–93 (Reapproved 2003) Designation: D 4651 – 08
Standard Specification for
1
Isobutane Thermophysical Property Tables
This standard is issued under the fixed designation D 4651; 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
1.1The isobutane thermophysical property tables are for use 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 were developed by the National Institute
of Standards and Technology (formerly the National Bureau of Standards) upon culmination of four years of effort in acquiring
available physical properties data, performing experimental measurements, and in formulating these tables for use in thermal
computations.
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.Tables are provided for gaseous and liquid
isobutane at temperatures between 120 and 570 K at pressures to 20 MPa. One table provides properties at the conditions of
liquid-vapor equilibrium (saturation properties). The other table provides properties at selected T, p points for the equilibrium
phase at those conditions. The tables were developed by the National Institute of Standards and Technology from a Standard
Reference Database product REFPROP, version 8.0.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
2. Sponsorship
2.1The preparation of the tables and supporting work was done by the National Institute of Standards and Technology (NIST)
under the sponsorship of the Gas Research Institute, theAmerican GasAssociation, and the Standard Reference Data Program of
NIST.
3.Applicability
3.1These2.1 These tables apply directly only to pure gaseous and liquid isobutane. However, it is expected that they willmay
find substantial use in mathematical models and tables for the thermophysical properties of mixtures containing isobutane, such
as natural gas. isobutane.
4.3. Tables
4.1These thermophysical property tables are:
4.1.1
3.1 These thermophysical property tables are:
3.1.1 Thermophysical Properties of Coexisting Gaseous and Liquid Isobutane, in SI units (Table inAppendix H, pp. 722–724).
3
4.1.2Thermophysical Properties of Isobutane, along isobars, in SI units (Table in Appendix H, pp. 725–757).
4.2These tables were produced by equations from a computer package. “NIST Thermophysical Properties of Fluids Database
12” (also designated MIPROPS) of the Standard Reference Data Program of NIST.Awide selection of units (SI units, engineering
units, chemical units) are available with this program.
5., in SI units. See Table 1.
3.1.2 Thermophysical Properties of Isobutane Along Isobars, in SI units. See Table 2.
3.2 The tabulated thermophysical properties are:
-1
r, molar density (mol·l )
-1
H, molar enthalpy (J·mol )
-1 -1
S, molar entropy (J·K ·mol )
1
This practicespecification 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 May 10, 2003.Dec. 1, 2008. Published May 2003.January 2009. Originally approved in 1987. Last previous edition approved in 19982003 as
D4651–93 (1998). D 4651 – 93 (2003).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D4651–08
TABLE 1 Thermophysical Properties of Coexisting Gaseous and Liquid Isobutane
T P r H S C C c h l
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
114 2.455E-08 12.733 -23331 110.20 68.27 98.21 1997.4 8618 157.88
114 2.455E-08 2.59E-08 4595.2 355.17 42.89 51.20 139.53 2.855 2.287
118 6.643E-08 12.668 -22937 113.60 68.75 98.94 1962.5 6774 157.1
118 6.643E-08 6.771E-08 4802.2 348.68 43.96 52.28 141.68 2.960 2.512
122 1.673E-07 12.603 -22540 116.91 69.25 99.68 1928.5 5441 156.3
122 1.673E-07 1.65E-07 5013.4 342.75 45.02 53.34
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D4651–93 (Reapproved 2003) Designation: D 4651 – 08
Standard Specification for
1
Isobutane Thermophysical Property Tables
This standard is issued under the fixed designation D 4651; 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
1.1The isobutane thermophysical property tables are for use 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 were developed by the National Institute
of Standards and Technology (formerly the National Bureau of Standards) upon culmination of four years of effort in acquiring
available physical properties data, performing experimental measurements, and in formulating these tables for use in thermal
computations.
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.Tables are provided for gaseous and liquid
isobutane at temperatures between 120 and 570 K at pressures to 20 MPa. One table provides properties at the conditions of
liquid-vapor equilibrium (saturation properties). The other table provides properties at selected T, p points for the equilibrium
phase at those conditions. The tables were developed by the National Institute of Standards and Technology from a Standard
Reference Database product REFPROP, version 8.0.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
2. Sponsorship
2.1The preparation of the tables and supporting work was done by the National Institute of Standards and Technology (NIST)
under the sponsorship of the Gas Research Institute, theAmerican GasAssociation, and the Standard Reference Data Program of
NIST.
3.Applicability
3.1These2.1 These tables apply directly only to pure gaseous and liquid isobutane. However, it is expected that they willmay
find substantial use in mathematical models and tables for the thermophysical properties of mixtures containing isobutane, such
as natural gas. isobutane.
4.3. Tables
4.1These thermophysical property tables are:
4.1.1
3.1 These thermophysical property tables are:
3.1.1 Thermophysical Properties of Coexisting Gaseous and Liquid Isobutane, in SI units (Table inAppendix H, pp. 722–724).
3
4.1.2Thermophysical Properties of Isobutane, along isobars, in SI units (Table in Appendix H, pp. 725–757).
4.2These tables were produced by equations from a computer package. “NIST Thermophysical Properties of Fluids Database
12” (also designated MIPROPS) of the Standard Reference Data Program of NIST.Awide selection of units (SI units, engineering
units, chemical units) are available with this program.
5., in SI units. See Table 1.
3.1.2 Thermophysical Properties of Isobutane Along Isobars, in SI units. See Table 2.
3.2 The tabulated thermophysical properties are:
-1
r, molar density (mol·l )
-1
H, molar enthalpy (J·mol )
-1 -1
S, molar entropy (J·K ·mol )
1
This practicespecification 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 May 10, 2003.Dec. 1, 2008. Published May 2003.January 2009. Originally approved in 1987. Last previous edition approved in 19982003 as
D4651–93 (1998). D 4651 – 93 (2003).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D4651–08
TABLE 1 Thermophysical Properties of Coexisting Gaseous and Liquid Isobutane
T P r H S C C c h l
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
114 2.455E-08 12.733 -23331 110.20 68.27 98.21 1997.4 8618 157.88
114 2.455E-08 2.59E-08 4595.2 355.17 42.89 51.20 139.53 2.855 2.287
118 6.643E-08 12.668 -22937 113.60 68.75 98.94 1962.5 6774 157.1
118 6.643E-08 6.771E-08 4802.2 348.68 43.96 52.28 141.68 2.960 2.512
122 1.673E-07 12.603 -22540 116.91 69.25 99.68 1928.5 5441 156.3
122 1.673E-07 1.65E-07 5013.4 342.75 45.02 53.34
...
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