ASTM D3956-07

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. 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 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 7.0.

General Information

• Status: Historical
• Publication Date: 31-May-2007
• ICS: 75.160.30 - Gaseous fuels
• Technical Committee: D03 - Gaseous Fuels
• Drafting Committee: D03.08 - Thermophysical Properties

Relations

• Replaces: ASTM D3956-93(2003)e1 - Standard Specification for Methane Thermophysical Property Tables
• Effective Date: 01-Jun-2007
• Replaced By: ASTM D3956-12 - Standard Specification for Methane Thermophysical Property Tables
• Effective Date: 01-Nov-2012

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 −07
StandardSpecification 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 3.3 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
for process design and operations. Tables are provided for
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 20 MPa. One table provides properties at
C = constant pressure molar heat capacity (J·K ·mol )
p
-1
the conditions of liquid-vapor equilibrium (saturation proper-
c = speed of sound (m·s )
η = viscosity (µPa·s)
ties). The other table provides properties at selected T, p points
-1 -1
λ = thermal conductivity (mW·m ·K )
for the equilibrium phase at those conditions. The tables were
developed by the National Institute of Standards and Technol-
3.4 These tables were produced by equations from a com-
ogy from a Standard Reference Database product REFPROP,
puter package, “NIST Standard Reference Database 23; Ref-
version 7.0.
erence Fluid Thermodynamic and Transport Properties Data-
base (REFPROP): Version 7.0.” 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
4. Additional Information
in mathematical models and tables for the thermophysical
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
properties used to generate the tables in this specification are:
3.1 Thermophysical Properties of Coexisting Gaseous and
enthalpy, H, and entropy, S, at 298.15 K and 0.101325 MPa
Liquid Methane, in SI units.
(H = 10018 J/mol and S = 186.266 J/(mol K)). The molar mass
3.2 Thermophysical Properties of Methane Along Isobars,
of methane is 16.043 g/mol.
in SI units.
5. Keywords
1
5.1 methane gas tables; natural gas; thermodynamic prop-
This specification is under the jurisdiction of ASTM Committee D03 on
Gaseous Fuels and is the direct responsibility of Subcommittee D03.08 on
erties of methane; transport properties of methane
Thermophysical Properties.
CurrenteditionapprovedJune1,2007.PublishedJuly2007.Originallyapproved
ϵ1 2
in 1982. Last previous edition approved in 2003 as D3956 – 93 (2003) . DOI: Available from Standard Reference Data, National Institute of Standards and
10.1520/D3956-07. 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

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D3956−07
TABLE 1 Thermophysical Properties of Coexisting Gaseous and Liquid Methane
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
90.70 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 0.027778 27.528 -15167 9903.7 34.08 54.52 1471.0 165.6 202.2
98 0.027778 0.034587 -6607.4 9991.1 25.43 34.28 257.87 3.883 9.687
100 0.034376 27.357 -15058 9904.8 33.91 54.68 1452.0 157.2 199.6
100 0.034376 0.042048 -6547.5 9989.9 25.49 34.42 260.09 3.960 9.939
102 0.042160 27.185 -14948 9905.9 33.74 54.85 1432.9 149.3 197.0
102 0.042160 0.050695 -6488.4 9988.9 25.55 34.58 262.24 4.036 10.19
104 0.051275 27.010 -14838 9907.0 33.58 55.04 1413.6 141.9 194.3
104 0.051275 0.060649 -6430.3 9987.8 25.62 34.76 264.31 4.114 10.46
106 0.061868 26.835 -14728 9908.0 33.42 55.23 1394.1 135.0 191.6
106 0.061868 0.072034 -6373.1 9986.9 25.69 34.95 266.29 4.192 10.72
108 0.074099 26.65
...