ASTM D3956-12

Standard Specification for Methane Thermophysical Property Tables

ABSTRACT
This specification presents the thermophysical property tables for methane, which are used in the calculation of the pressure-volume-temperature (PVT), thermodynamic, and transport properties of methane for process design and operations. Tables are provided for gaseous and liquid methane at specified temperature and pressure ranges. 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. These tables apply directly only to pure gaseous methane, but are expected to be substantially useful in mathematical models and tables for the thermophysical properties of mixtures containing methane.
SCOPE
1.1 The thermophysical property tables for methane are for use in the calculation of the pressure-volume-temperature (PVT), thermodynamic, and transport properties of methane for process design and operations. Three tables are provided for gaseous and liquid methane at temperatures between 90 K and 600K at pressures to 30 MPa. Two tables provide properties for the liquid and vapor phases at liquid-vapor equilibrium (saturation properties). The third 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 9.0.

General Information

• Status: Historical
• Publication Date: 31-Oct-2012
• ICS: 75.160.30 - Gaseous fuels
• Technical Committee: D03 - Gaseous Fuels
• Drafting Committee: D03.08 - Thermophysical Properties

Relations

• Replaces: ASTM D3956-07 - Standard Specification for Methane Thermophysical Property Tables
• Effective Date: 01-Nov-2012
• Replaced By: ASTM D3956-12(2018) - Standard Specification for Methane Thermophysical Property Tables
• Effective Date: 01-Apr-2018

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D3956 −12
Standard Specification for
1
Methane Thermophysical Property Tables
This standard is issued under the fixed designation D3956; 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 3.4 The tabulated properties are:
1.1 The thermophysical property tables for methane are for
use in the calculation of the pressure-volume-temperature -1
ρ = molar density (mol·L )
-1
(PVT), thermodynamic, and transport properties of methane
H = molar enthalpy (J·mol )
-1 -1
forprocessdesignandoperations.Threetablesareprovidedfor
S = molar entropy (J·K ·mol )
-1 -1
gaseous and liquid methane at temperatures between 90 K and
C = constant volume molar heat capacity (J·K ·mol )
v
-1 -1
600K at pressures to 30 MPa.Two tables provide properties for
C = constant pressure molar heat capacity (J·K ·mol )
p
-1
the liquid and vapor phases at liquid-vapor equilibrium (satu-
c = speed of sound (m·s )
η = viscosity (µPa·s)
ration properties). The third table provides properties at se-
-1 -1
λ = thermal conductivity (mW·m ·K )
lected T, p points for the equilibrium phase at those conditions.
The tables were developed by the National Institute of Stan-
3.5 These tables were produced by equations from a com-
dards and Technology from a Standard Reference Database
puter package, “NIST Standard Reference Database 23; Ref-
product REFPROP, version 9.0.
erence Fluid Thermodynamic and Transport Properties Data-
base (REFPROP): Version 9.0.” A wide selection of units (SI
2. Applicability
units, engineering units, chemical units) and additional prop-
2
2.1 These tables apply directly only to pure gaseous meth-
erties are available with this program.
ane. However, it is expected that they may find substantial use
in mathematical models and tables for the thermophysical
4. Additional Information
properties of mixtures containing methane.
4.1 Reference state properties are required to calculate
certain of the thermodynamic properties (enthalpy, entropy,
3. Tables
etc.) from an equation of state formulation. The reference state
3.1 Thermophysical Properties of Methane Liquid at
properties used to generate the tables in this specification are:
Liquid-Vapor Equilibrium, in SI units.
enthalpy, H, and entropy, S, at 298.15 K and 0.101325 MPa
3.2 Thermophysical Properties of Methane Vapor at Liquid-
(H = 10018 J/mol and S = 186.266 J/(mol K)). The molar mass
Vapor Equilibrium, in SI units.
of methane is 16.043 g/mol.
3.3 Thermophysical Properties of Methane Along Isobars,
5. Keywords
in SI units.
5.1 methane gas tables; natural gas; thermodynamic prop-
1
This specification is under the jurisdiction of ASTM Committee D03 on erties of methane; transport properties of methane
Gaseous Fuels and is the direct responsibility of Subcommittee D03.08 on
Thermophysical Properties.
Current edition approved Nov. 1, 2012. Published December 2012. Originally
2
approved in 1982. Last previous edition approved in 2007 as D3956 – 07. DOI: Available from Standard Reference Data, National Institute of Standards and
10.1520/D3956-12. 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 ----------------------
D3956−12
TABLE 1 Thermophysical Properties of Methane Liquid at Liquid-Vapor 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
90.7 0.011705 28.141 84267 67.794 34.775 54.029 1538.5 193.53 211.18
92 0.013801 28.033 84338 68.563 34.641 54.102 1526.7 186.13 209.64
94 0.017613 27.866 84446 69.728 34.445 54.226 1508.4 175.87 207.20
96 0.022233 27.698 84555 70.870 34.258 54.366 1489.8 166.73 204.71
98 0.027778 27.528 84664 71.992 34.08 54.517 1471.0 158.48 202.16
100 0.034376 27.357 84773 73.095 33.908 54.681 1452.0 150.97 199.56
102 0.04216 27.185 84883 74.178 33.741 54.854 1432.9 144.06 196.92
104 0.051275 27.010 84993 75.244 33.579 55.039 1413.6 137.66 194.24
106 0.061868 26.835 85103 76.293 33.421 55.234 1394.1 131.71 191.53
108 0.074099 26.657 85214 77.326 33.266 55.439 1374.5 126.14 188.79
110 0.08813 26.478 85326 78.343 33.115 55.656 1354.7 120.90 186.02
112 0.10413 26.297 85438 79.346 32.966 55.885 1334.8 115.97 183.24
114 0.12228 26.113 85550 80.335 32.82 56.127 1314.7 111.30 180.44
116 0.14275 25.928 85663 81.310 32.677 56.383 1294.4 106.88 177.62
118 0.16574 25.740 85777 82.273 32.537 56.653 1274.0 102.68 174.79
120 0.19143 25.551 85891 83.224 32.4 56.941 1253.5 98.680 171.95
122 0.22002 25.358
...

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: D3956 − 07 D3956 − 12
Standard Specification for
1
Methane Thermophysical Property Tables
This standard is issued under the fixed designation D3956; 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
1.1 The thermophysical property tables for methane are for use in the calculation of the pressure-volume-temperature (PVT),
thermodynamic, and transport properties of methane for process design and operations. Tables Three tables are provided for
gaseous and liquid methane at temperatures between 90 K and 600K at pressures to 20 MPa. One table provides properties at the
conditions of 30 MPa. Two tables provide properties for the liquid and vapor phases at liquid-vapor equilibrium (saturation
properties). The otherthird 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 7.0.9.0.
2. Applicability
2.1 These tables apply directly only to pure gaseous methane. However, it is expected that they may find substantial use in
mathematical models and tables for the thermophysical properties of mixtures containing methane.
3. Tables
3.1 Thermophysical Properties of Coexisting Gaseous and Liquid Methane, Methane Liquid at Liquid-Vapor Equilibrium, in SI
units.
3.2 Thermophysical Properties of Methane Vapor at Liquid-Vapor Equilibrium, in SI units.
3.3 Thermophysical Properties of Methane Along Isobars, in SI units.
3.4 The tabulated properties are:
-1
ρ= molar density (mol·l )
-1
ρ= molar density (mol·L )
-1
H = molar enthalpy (J·mol )
-1 -1
S = molar entropy (J·K ·mol )
-1 -1
C = constant volume molar heat capacity (J·K ·mol )
v
-1 -1
C = constant pressure molar heat capacity (J·K ·mol )
p
-1
c = speed of sound (m·s )
η= viscosity (μPa·s)
-1 -1
λ= thermal conductivity (mW·m ·K )
3.5 These tables were produced by equations from a computer package, “NIST Standard Reference Database 23; Reference
Fluid Thermodynamic and Transport Properties Database (REFPROP): Version 7.0.”9.0.” A wide selection of units (SI units,
2
engineering units, chemical units) and additional properties are available with this program.
4. Additional Information
4.1 Reference state properties are required to calculate certain of the thermodynamic properties (enthalpy, entropy, etc.) from
an equation of state formulation. The reference state properties used to generate the tables in this specification are: enthalpy, H,
and entropy, S, at 298.15 K and 0.101325 MPa (H = 10018 J/mol and S = 186.266 J/(mol K)). The molar mass of methane is 16.043
g/mol.
1
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 June 1, 2007Nov. 1, 2012. Published July 2007December 2012. Originally approved in 1982. Last previous edition approved in 20032007 as
ε1
D3956 – 93 (2003)D3956 – 07. . DOI: 10.1520/D3956-07.10.1520/D3956-12.
2
Available from Standard Reference Data, National Institute of Standards and 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 ----------------------
D3956 − 12
5. Keywords
5.1 methane gas tables; natural gas; thermodynamic properties of methane; transport properties of methane
2

---------------------- Page: 2 ----------------------
D3956 − 12
TABLE 1 Thermophysical Properties of Coexisting Gaseous and Liquid Methane
T pρH S C C cηλv 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
90.70 0.011705 28.141 -15564 9899.5 34.78 54.03 1538.5 201.9 211.2
90.70 0.011705 0.015641 -6832.4 9995.8 25.24 33.85 249.13 3.609 8.792
92 0.013801 28.033 -15493 9900.3 34.64 54.10 1526.7 194.8 209.6
92 0.013801 0.018199 -6791.7 9994.9 25.27 33.92 250.76 3.658 8.949
94 0.017613 27.866 -15385 9901.5 34.44 54.23 1508.4 184.4 207.2
94 0.017613 0.02277 -6729.6 9993.5 25.32 34.02 253.2 3.732 9.192
96 0.022233 27.698 -15276 9902.6 34.26 54.37 1489.8 174.7 204.7
96 0.022233 0.028198 -6668.2 9992.3 25.37 34.14 255.57 3.808 9.438
98 0.027
...