ASTM_D_4650_-_19.pdf

Designation:D465019Standard Specification forNormal Butane Thermophysical Property Tables1This standard is issued under the fixed designation D4650;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number 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 normal butaneare for use in the calculation of the pressure-volume-temperature(PVT),thermodynamic,and transport propertiesof normal butane for process design and operations.Two tablesprovide properties at the conditions of liquid-vapor equilibrium(saturation properties),one for liquid and one for vapor,attemperatures between 135 K and the critical point,425.13 K.Athird table provides properties at selected T,p points for theequilibrium phase at temperatures between 140 K and 570 K atpressures to 20 MPa.The tables were developed using theNational Institute of Standards and Technology Standard Ref-erence Database product REFPROP,version 10.0.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Applicability2.1 These tables apply directly only to pure normal butane.They may also be used in mathematical models and tables forthe thermophysical properties of mixtures containing normalbutane.3.Tables3.1 These tables were produced by equations from a com-puter package,“NIST Standard Reference Database 23;Ref-erence Fluid Thermodynamic and Transport Properties Data-base(REFPROP):Version 10.0.”2Awide selection of units(SIunits,engineering units,chemical units)and additional prop-erties are available with this program.3.2 These thermophysical property tables are:3.2.1 Thermophysical Properties of Normal Butane Liquidat Vapor-Liquid Equilibrium,in SI units.See Table 1.3.2.2 Thermophysical Properties of Normal Butane Vaporat Vapor-Liquid Equilibrium,in SI units.See Table 2.3.2.3 Thermophysical Properties of Normal Butane 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),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(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 Refrigera-tion(IIR):enthalpy,H=200 J/g,and entropy,S=1 J/(gK),forthe saturated liquid at 273.15 K(0 C).4.2 The molar mass of normal butane is 58.122 g/mol.5.Keywords5.1 butane;N-butane;natural gas;normal butane gas tables;thermodynamic properties of normal butane;transport proper-ties of normal butane1This 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 April 1,2019.Published May 2019.Originallyapproved in 1987.Last previous edition approved in 2014 as D4650 14.DOI:10.1520/D4650-19.2Available from Standard Reference Data,National Institute of Standards andTechnology(NIST),100 Bureau Dr.,Stop 1070,Gaithersburg,MD 20899-1070,http:/www.nist.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 TABLE 1 Thermophysical Properties of Normal Butane Liquid at Vapor-Liquid EquilibriumTpHSCvCpcKMPamoll-1Jmol-1Jmol-1K-1Jmol-1K-1Jmol-1K-1ms-1PasmWm-1K-11356.7910E-0712.643-5208.7-26.94483.783114.671826.102350.5176.531379.8726E-0712.611-4979.3-25.25783.793114.771812.802172.0175.861391.4181E-0612.579-4749.6-23.59383.799114.871799.602012.7175.191412.0137E-0612.547-4519.8-21.95183.805114.971786.601870.2174.491432.8282E-0612.515-4289.8-20.33183.809115.071773.701742.4173.791453.9306E-0612.483-4059.5-18.73283.814