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trans-Butene !Short name
624-64-6 !CAS number
trans-2-Butene !Full name
CH3-CH=CH-CH3 !Chemical formula {C4H8}
(E)-2-Butene !Synonym
56.10632 !Molar mass [g/mol]
167.6 !Triple point temperature [K]
274.03 !Normal boiling point [K]
428.61 !Critical temperature [K]
4027.3 !Critical pressure [kPa]
4.213 !Critical density [mol/L]
0.21 !Acentric factor
0.0 !Dipole moment [Debye]; (exactly zero due to symmetry) Watson, H.E. and K.L. Ramaswamy, Proc. Roy. Soc. (London), A156, 130-137 (1936).
NBP !Default reference state
10.0 !Version number
1012 !UN Number :UN:
n-alkene !Family :Family:
2706.4 !Heating value (upper) [kJ/mol] :Heat:
1S/C4H8/c1-3-4-2/h3-4H,1-2H3/b4-3+ !Standard InChI String :InChi:
IAQRGUVFOMOMEM-ONEGZZNKSA-N !Standard InChI Key :InChiKey:
7b3b4080 (butane) !Alternative fluid for mixing rules :AltID:
b28337f0 !Hash number from InChI Key :Hash:
!The fluid files contain general information about the fluid in the first 15 to 20 lines, followed by sections for the
! equations of state, transport equations, and auxiliary equations. Equations of state are listed first. The NIST recommended
! equations begin with a hash mark (#). The secondary equations begin with the @ symbol. These symbols can be swapped to
! select a secondary equation as primary and the primary as secondary. The equation of state section also contains auxiliary
! equations for the ideal gas heat capacity or ideal gas Helmholtz energy. Below the equations of state (both primary and
! secondary) are the transport equations, first viscosity and then thermal conductivity. These are then followed by the
! secondary equations if available. The transport section also contains auxiliary equations required to calculate either the
! dilute gas state or the critical enhancement. At the end of the file are additional but not necessary auxiliary equations,
! including simple equations for the vapor pressure, saturated liquid and vapor densities, melting line (for some fluids), and
! sublimation line (for even fewer fluids). This section also contains the equations for dielectric constant and surface
! tension if available. The sections are divided by different symbols (these being _-+=^*~) to aid the eye in locating a
! particular section. Secondary equations are indented 10 spaces to avoid confusion with the NIST recommended equations. The
! end of the fluid file is marked with @END. Anything below that is ignored.
! compiled by E.W. Lemmon, NIST Physical and Chemical Properties Division, Boulder, Colorado
! 12-17-03 EWL, Original version.
! 10-14-04 MLH, Add family.
! 11-13-06 MLH, Add LJ parameters.
! 08-17-10 IDC, Add ancillary equations.
! 04-17-14 EWL, Add surface tension coefficients of Mulero et al. (2014).
! 05-04-16 MLH, Add viscosity and thermal conductivity estimates.
________________________________________________________________________________
#EOS !---Equation of state---
FEQ !Helmholtz equation of state for trans-butene of Lemmon and Ihmels (2005).
:TRUECRITICALPOINT: 428.61 4.213 !True EOS critical point [K, mol/L] (where dP/dD=0 and d^2P/dD^2=0 at constant T)
:DOI: 10.1016/j.fluid.2004.09.004
?
?```````````````````````````````````````````````````````````````````````````````
?Lemmon, E.W. and Ihmels, E.C.,
? "Thermodynamic Properties of the Butenes. Part II. Short Fundamental
? Equations of State,"
? Fluid Phase Equilib., 228-229C:173-187, 2005.
?
?The uncertainties in densities calculated with the equation of state
? are 0.1% in the liquid phase at temperatures above 270 K (rising to
? 0.5% at temperatures below 200 K), 0.2% at temperatures above the
? critical temperature and at pressures above 10 MPa, and 0.5% in the
? vapor phase, including supercritical conditions below 10 MPa. The
? uncertainty in the vapor phase may be higher than 0.5% in some regions.
? The uncertainty in vapor pressure is 0.3% above 200 K, and the
? uncertainty in heat capacities is 0.5% at saturated liquid conditions,
? rising to 5% at much higher pressures and at temperatures above 250 K.
?
!```````````````````````````````````````````````````````````````````````````````
167.6 !Lower temperature limit [K]
525. !Upper temperature limit [K]
50000. !Upper pressure limit [kPa]
13.141 !Maximum density [mol/L]
CPP !Pointer to Cp0 model
56.10632 !Molar mass [g/mol]
167.6 !Triple point temperature [K]
0.07481 !Pressure at triple point [kPa]
13.14 !Density at triple point [mol/L]
274.03 !Normal boiling point temperature [K]
0.21 !Acentric factor
428.61 4027.3 4.213 !Tc [K], pc [kPa], rhoc [mol/L]
428.61 4.213 !Reducing parameters [K, mol/L]
8.314472 !Gas constant [J/mol-K]
12 4 0 0 0 0 0 0 0 0 0 0 !# terms and # coefs/term for normal terms, Gaussian terms, and Gao terms
0.81107 0.12 1. 0. !a(i),t(i),d(i),l(i)
-2.8846 1.3 1. 0.
1.0265 1.74 1. 0.
0.016591 2.1 2. 0.
0.086511 0.28 3. 0.
0.00023256 0.69 7. 0.
0.22654 0.75 2. 1.
-0.072182 2.0 5. 1.
-0.24849 4.4 1. 2.
-0.071374 4.7 4. 2.
-0.024737 15.0 3. 3.
0.011843 14.0 4. 3.
#AUX !---Auxiliary function for Cp0
CPP !Ideal gas heat capacity function for trans-butene of Lemmon and Ihmels (2005).
?
?```````````````````````````````````````````````````````````````````````````````
?Lemmon, E.W. and Ihmels, E.C., 2015.
?
!```````````````````````````````````````````````````````````````````````````````
0. !
10000. !
0. !
0. !
1.0 8.314472 !Reducing parameters for T, Cp0
1 4 0 0 0 0 0 !Nterms: polynomial, exponential, cosh, sinh
3.9988 0.0
5.3276 362.0
13.29 1603.0
9.6745 3729.0
0.40087 4527.0
#AUX !---Auxiliary function for PX0
PX0 !Helmholtz energy ideal-gas function for trans-butene of Lemmon and Ihmels (2005).
?
?```````````````````````````````````````````````````````````````````````````````
?Lemmon, E.W. and Ihmels, E.C., 2015.
?
!```````````````````````````````````````````````````````````````````````````````
1 2 4 0 0 0 0 0 !Nterms: ai*log(tau**ti); ai*tau**ti; ai*log(1-exp(bi*tau))
2.9988 1.0 !ai, ti for [ai*log(tau**ti)] terms
0.5917836623979218 0.0 !aj, ti for [ai*tau**ti] terms
2.1427744975995116 1.0 !aj, ti for [ai*tau**ti] terms
5.3276 362.0 !aj, ti for [ai*log(1-exp(-ti/T)] terms
13.29 1603.0
9.6745 3729.0
0.40087 4527.0
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
#TRN !---ECS Transport---
ECS !Extended Corresponding States model (Propane reference); predictive mode for trans-butene.
:DOI: 10.6028/NIST.IR.8209
?
?```````````````````````````````````````````````````````````````````````````````
?*** ESTIMATION METHOD *** NOT STANDARD REFERENCE QUALITY ***
?Huber, M.L., "Models for the Viscosity, Thermal Conductivity, and Surface Tension
? of Selected Pure Fluids as Implemented in REFPROP v10.0," NISTIR 8209, 2018.
? doi: 10.6028/NIST.IR.8209
?
?Estimated uncertainty 5% for gas phase; 20% for viscosity and thermal conductivity of liquid phase.
? Liquid phase data unavailable.
?
?The Lennard-Jones parameters were estimated from Hirschfelder, J.O., Curtiss, C.F., and Bird, R.B., "Molecular Theory of Gases and Liquids," John Wiley and Sons, Inc., New York, 1245 pp, 1954. doi: 10.1002/pol.1955.120178311
?
!```````````````````````````````````````````````````````````````````````````````
167.6 !Lower temperature limit [K]
525.0 !Upper temperature limit [K]
50000.0 !Upper pressure limit [kPa]
13.141 !Maximum density [mol/L]
FEQ PROPANE.FLD
VS1 !Model for reference fluid viscosity
TC1 !Model for reference fluid thermal conductivity
NUL !Large molecule identifier
1 !Lennard-Jones flag (0 or 1) (0 => use estimates)
0.5508 !Lennard-Jones coefficient sigma [nm]
259.0 !Lennard-Jones coefficient epsilon/kappa [K]
2 0 0 !Number of terms in f_int term in Eucken correlation, spare1, spare2
0.00102143 0. 0. 0. !Coefficient, power of T, spare1, spare2 coeff from isobutene
6.64409e-7 1. 0. 0. !Coefficient, power of T, spare1, spare2
3 0 0 !Number of terms in psi (visc shape factor): poly,spare1,spare2
1.12449 0. 0. 0. !Coefficient, power of Tr, power of Dr, spare; coeff from isobutene
-0.147034 0. 1. 0. !Coefficient, power of Tr, power of Dr, spare
0.036655 0. 2. 0. !Coefficient, power of Tr, power of Dr, spare
2 0 0 !Number of terms in chi (t.c. shape factor): poly,spare1,spare2
0.838527 0. 0. 0. !Coefficient, power of Tr, power of Dr, spare; coeff from isobutene
0.0648013 0. 1. 0. !Coefficient, power of Tr, power of Dr, spare
TK3 !Pointer to critical enhancement auxiliary function
#AUX !---Auxiliary function for the thermal conductivity critical enhancement
TK3 !Simplified thermal conductivity critical enhancement for trans-butene of Perkins et al. (2013).
?
?```````````````````````````````````````````````````````````````````````````````
?Perkins, R.A., Sengers, J.V., Abdulagatov, I.M., and Huber, M.L.,
? "Simplified Model for the Critical Thermal-Conductivity Enhancement in Molecular Fluids,"
? Int. J. Thermophys., 34(2):191-212, 2013. doi: 10.1007/s10765-013-1409-z
?
!```````````````````````````````````````````````````````````````````````````````
0. !
10000. !
0. !
0. !
9 0 0 0 !# terms: CO2-terms, spare, spare, spare
1.0 1.0 1.0 !Reducing parameters for T, rho, tcx [mW/(m-K)]
0.63 !Nu (universal exponent)
1.239 !Gamma (universal exponent)
1.02 !R0 (universal amplitude)
0.063 !Z (universal exponent--not used for t.c., only viscosity)
1.0 !C (constant in viscosity eqn = 1/[2 - (alpha + gamma)/(2*nu)], but often set to 1)
0.21e-9 !Xi0 (amplitude) [m]
0.057 !Gam0 (amplitude) [-]
0.609e-9 !Qd_inverse (modified effective cutoff parameter) [m]
642.92 !Tref (reference temperature)=1.5*Tc [K]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#STN !---Surface tension---
ST1 !Surface tension model for trans-butene of Mulero et al. (2014).
:DOI: 10.1063/1.4878755
?
?```````````````````````````````````````````````````````````````````````````````
?Mulero, A. and Cachadiña, I.,
? "Recommended Correlations for the Surface Tension of Several Fluids
? Included in the REFPROP Program,"
? J. Phys. Chem. Ref. Data, 43, 023104, 2014.
? doi: 10.1063/1.4878755
?
!```````````````````````````````````````````````````````````````````````````````
0. !
10000. !
0. !
0. !
2 !Number of terms in surface tension model
428.61 !Critical temperature used in fit (dummy)
0.0001859 0.07485 !Sigma0 and n
0.05539 1.224
#PS !---Vapor pressure---
PS5 !Vapor pressure equation for trans-butene of Cullimore (2010).
?
?```````````````````````````````````````````````````````````````````````````````
?Cullimore, I.D., 2010.
?
?Functional Form: P=Pc*EXP[SUM(Ni*Theta^ti)*Tc/T] where Theta=1-T/Tc, Tc and Pc
? are the reducing parameters below, which are followed by rows containing Ni and ti.
?
!```````````````````````````````````````````````````````````````````````````````
0. !
10000. !
0. !
0. !
428.61 4027.3 !Reducing parameters
5 0 0 0 0 0 !Number of terms in equation
-7.6226 1.0
7.9421 1.5
-6.9631 1.65
-6.5517 4.8
3.9584 5.3
#DL !---Saturated liquid density---
DL1 !Saturated liquid density equation for trans-butene of Cullimore (2010).
?
?```````````````````````````````````````````````````````````````````````````````
?Cullimore, I.D., 2010.
?
?Functional Form: D=Dc*[1+SUM(Ni*Theta^ti)] where Theta=1-T/Tc, Tc and Dc are
? the reducing parameters below, which are followed by rows containing Ni and ti.
?
!```````````````````````````````````````````````````````````````````````````````
0. !
10000. !
0. !
0. !
428.61 4.213 !Reducing parameters
5 0 0 0 0 0 !Number of terms in equation
12.452 0.52
-34.419 0.73
52.257 0.97
-42.889 1.24
15.463 1.50
#DV !---Saturated vapor density---
DV3 !Saturated vapor density equation for trans-butene of Cullimore (2010).
?
?```````````````````````````````````````````````````````````````````````````````
?Cullimore, I.D., 2010.
?
?Functional Form: D=Dc*EXP[SUM(Ni*Theta^ti)] where Theta=1-T/Tc, Tc and Dc are
? the reducing parameters below, which are followed by rows containing Ni and ti.
?
!```````````````````````````````````````````````````````````````````````````````
0. !
10000. !
0. !
0. !
428.61 4.213 !Reducing parameters
6 0 0 0 0 0 !Number of terms in equation
-3.1276 0.412
-6.0548 1.24
-18.243 3.2
-60.842 7.0
135.95 10.0
-182.70 11.0
@END
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