Sulfur hexafluoride !Short name 2551-62-4 !CAS number Sulfur hexafluoride !Full name SF6 !Chemical formula {SF6} Sulfur fluoride !Synonym 146.0554192 !Molar mass [g/mol] 223.555 !Triple point temperature [K] 204.9 !Normal boiling point [K] 318.7232 !Critical temperature [K] 3754.983 !Critical pressure [kPa] 5.0823 !Critical density [mol/L] 0.218 !Acentric factor (calculated by extrapolating the vapor pressure curve beyond the triple point temperature) 0.0 !Dipole moment [Debye]; (exactly zero due to symmetry) IIR !Default reference state 10.0 !Version number 1080 !UN Number :UN: other !Family :Family: ???? !Heating value (upper) [kJ/mol] :Heat: 1S/F6S/c1-7(2,3,4,5)6 !Standard InChI String :InChi: SFZCNBIFKDRMGX-UHFFFAOYSA-N !Standard InChI Key :InChiKey: 434e2a40 (ethane) !Alternative fluid for mixing rules :AltID: 7a75e610 !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 M. McLinden, NIST Physical and Chemical Properties Division, Boulder, Colorado ! 03-14-97 MM, Original version. ! 08-24-98 EWL, Change EOS to that of de Reuck et al. (1991). ! 11-18-98 EWL, Add equation of state of Polt et al. (1992). ! 10-05-06 EWL, Add Guder and Wagner EOS. ! 08-13-08 EWL, Add additional information from Guder and Wagner publication. ! 04-05-11 MLH, Add altunin viscosity model and hafer viscosity models. ! 11-18-11 MLH, Add revised FT model. ! 01-09-12 MLH, Add Assael thermal conductivity model. ! 09-18-12 MLH, Update references on thermal conductivity and viscosity. ! 12-06-12 EWL, Add surface tension coefficients of Mulero et al. (2012). ! 06-03-14 MLH, Correct thermal conductivity density scaling factor. ! 08-26-14 EWL, Change acentric factor from 0.21 to 0.218. ! 05-15-17 EWL, Change the hard coded VS0 model to the VS7 reverse Polish notation. ! 02-02-18 EWL, Add melting line model of Harvey (2017). ________________________________________________________________________________ #EOS !---Equation of state--- FEQ !Helmholtz equation of state for sulfur hexafluoride of Guder and Wagner (2009). :TRUECRITICALPOINT: 318.7232 5.0823174112 !True EOS critical point [K, mol/L] (where dP/dD=0 and d^2P/dD^2=0 at constant T) :DOI: 10.1063/1.3037344 ? ?``````````````````````````````````````````````````````````````````````````````` ?Guder, C. and Wagner, W., ? "A Reference Equation of State for the Thermodynamic Properties of Sulfur ? Hexafluoride (SF6) for Temperatures from the Melting Line to 625 K and ? Pressures up to 150 MPa," ? J. Phys. Chem. Ref. Data, 38(1):33-94, 2009. doi: 10.1063/1.3037344 ? ?The uncertainties in density are 0.02% for temperatures less than 340 K ? (<30 MPa), 0.03% for temperatures below 500 K (<30 MPa), 0.1% increasing ? to 0.3% at temperatures above 500 K, and 0.2% for all temperatures at ? pressures above 30 MPa increasing to 1% at the pressure limits of the ? equation of state. In the critical region, the uncertainty in ? pressure is 0.01%. The uncertainties in the speed of sound range from ? 0.1% at the lowest temperatures in the gas phase, to 0.5% in the liquid, ? and to 1-2% elsewhere. The uncertainties in heat capacities are ? generally within 2%, decreasing to 0.2% at the lowest pressures in the ? vapor phase; below 400 K and above 20 MPa, the uncertainties are 5%. ? The uncertainty in vapor pressure is 0.01%. ? !``````````````````````````````````````````````````````````````````````````````` 223.555 !Lower temperature limit [K] 625.0 !Upper temperature limit [K] 150000.0 !Upper pressure limit [kPa] 14.5 !Maximum density [mol/L] CPP !Pointer to Cp0 model 146.0554192 !Molar mass [g/mol] 223.555 !Triple point temperature [K] 231.429 !Pressure at triple point [kPa] 12.632 !Density at triple point [mol/L] 204.9 !Normal boiling point temperature [K] 0.218 !Acentric factor 318.7232 3754.983 5.0823174112 !Tc [K], pc [kPa], rhoc [mol/L] 318.7232 5.0823174112 !Reducing parameters [K, mol/L] 8.314472 !Gas constant [J/mol-K] 22 4 14 12 0 0 0 0 0 0 0 0 !# terms and # coefs/term for normal terms, Gaussian terms, and Gao terms 0.54958259132835 0.125 1. 0. !a(i),t(i),d(i),l(i) -0.87905033269396 1.25 1. 0. -0.84656969731452 1.875 1. 0. 0.27692381593529 0.125 2. 0. -4.9864958372345 1.5 2. 0. 4.8879127058055 1.625 2. 0. 0.036917081634281 1.5 3. 0. 0.00037030130305087 5.625 3. 0. 0.039389132911585 0.625 4. 0. 0.00042477413690006 0.25 6. 0. -0.02415001386389 6.0 1. 1. 0.059447650642255 0.25 2. 1. -0.38302880142267 4.75 2. 1. 0.32606800951983 5.375 2. 1. -0.029955940562031 5.875 3. 1. -0.086579186671173 2.0 6. 1. 4.1600684707562 5.875 2. 2. -4.1398128855814 6.0 2. 2. -0.55842159922714 5.625 4. 2. 0.56531382776891 5.75 4. 2. 0.0082612463415545 0.0 2. 3. -0.01020099533808 0.5 2. 3. -0.021662523861406 4.0 1. 2. 2. -10.0 -150.0 1.13 0.85 0. 0. 0. 0.034650943893908 1.0 3. 2. 2. -10.0 -150.0 1.13 0.85 0. 0. 0. -0.028694281385812 3.0 4. 2. 2. -10.0 -150.0 1.13 0.85 0. 0. 0. 0.0084007238998053 2.0 1. 2. 2. -10.0 -150.0 1.16 0.85 0. 0. 0. -0.26969359922498 4.0 1. 2. 2. -11.0 -225.0 1.19 1.0 0. 0. 0. 9.0415215646344 3.0 4. 2. 2. -25.0 -300.0 1.19 1.0 0. 0. 0. -3.7233103557977 4.0 3. 2. 2. -30.0 -350.0 1.16 1.0 0. 0. 0. -2752.4670823704 1.0 4. 2. 2. -30.0 -350.0 1.16 1.0 0. 0. 0. 5771.1861697319 2.0 4. 2. 2. -30.0 -350.0 1.16 1.0 0. 0. 0. -3023.4003119748 3.0 4. 2. 2. -30.0 -350.0 1.16 1.0 0. 0. 0. 2225277.843536 3.0 1. 2. 2. -30.0 -400.0 1.22 1.0 0. 0. 0. -2305606.5559032 4.0 1. 2. 2. -30.0 -400.0 1.22 1.0 0. 0. 0. 6391885.2944475 3.0 3. 2. 2. -30.0 -400.0 1.22 1.0 0. 0. 0. -6079209.1415592 4.0 3. 2. 2. -30.0 -400.0 1.22 1.0 0. 0. 0. eta beta gamma epsilon EXP[eta*(delta-epsilon)^2+beta*(tau-gamma)^2] #AUX !---Auxiliary function for Cp0 CPP !Ideal gas heat capacity function for sulfur hexafluoride of Guder and Wagner (2009). ? ?``````````````````````````````````````````````````````````````````````````````` ?Guder, C. and Wagner, W., 2009. ? !``````````````````````````````````````````````````````````````````````````````` 0. ! 10000. ! 0. ! 0. ! 1.0 8.314472 !Reducing parameters for T, Cp0 1 3 0 0 0 0 0 !Nterms: polynomial, exponential, cosh, sinh 4.0 0.0 3.66118232 515.4653151 7.87885103 875.5693279 3.45981679 1349.12572 #AUX !---Auxiliary function for PX0 PX0 !Helmholtz energy ideal-gas function for sulfur hexafluoride of Guder and Wagner (2009). ? ?``````````````````````````````````````````````````````````````````````````````` ?Guder, C. and Wagner, W., 2009. ? !``````````````````````````````````````````````````````````````````````````````` 1 2 3 0 0 0 0 0 !Nterms: ai*log(tau**ti); ai*tau**ti; ai*log(1-exp(bi*tau)) 3.0 1.0 !ai, ti for [ai*log(tau**ti)] terms -15.4089857348096295 0.0 !aj, ti for [ai*tau**ti] terms 10.8151609115241314 1.0 !aj, ti for [ai*tau**ti] terms 3.66118232 515.4653151 !aj, ti for [ai*log(1-exp(-ti/T)] terms 7.87885103 875.5693279 3.45981679 1349.12572 #AUX !---Auxiliary function for PH0 PH0 !Ideal gas Helmholtz form for sulfur hexafluoride of Guder and Wagner (2009). ? ?``````````````````````````````````````````````````````````````````````````````` ?Guder, C. and Wagner, W., 2009. ? !``````````````````````````````````````````````````````````````````````````````` 0. ! 10000. ! 0. ! 0. ! 1 2 3 0 0 0 0 0 !Nterms: ai*log(tau**ti); ai*tau**ti; ai*log(1-exp(bi*tau)); cosh; sinh 3.0 1.0 !ai, ti for [ai*log(tau**ti)] terms 11.638611086 0.0 !aj, ti for [ai*tau**ti] terms -6.392241811 1.0 3.66118232 -1.617282065 !aj, ti for [ai*log(1-exp(ti*tau)] terms 7.87885103 -2.747115139 3.45981679 -4.232907175 -------------------------------------------------------------------------------- @EOS !---Equation of state--- FES !Helmholtz equation of state for sulfur hexafluoride of Span and Wagner (2003). ? ?``````````````````````````````````````````````````````````````````````````````` ?Span, R. and Wagner, W. ? "Equations of State for Technical Applications. II. Results for Nonpolar Fluids," ? Int. J. Thermophys., 24(1):41-109, 2003. doi: 10.1023/A:1022310214958 ? ?The uncertainties of the equation of state are approximately 0.2% (to ? 0.5% at high pressures) in density, 1% (in the vapor phase) to 2% in ? heat capacity, 1% (in the vapor phase) to 2% in the speed of sound, and ? 0.2% in vapor pressure, except in the critical region. ? !``````````````````````````````````````````````````````````````````````````````` 222.38 !Lower temperature limit [K] 600.0 !Upper temperature limit [K] 100000.0 !Upper pressure limit [kPa] 12.65 !Maximum density [mol/L] CP1 !Pointer to Cp0 model 146.054 !Molar mass [g/mol] 222.38 !Triple point temperature [K] 221.22 !Pressure at triple point [kPa] 12.645 !Density at triple point [mol/L] 205.56 !Normal boiling point temperature [K] 0.218 !Acentric factor 318.7232 3755.0 5.0813398 !Tc [K], pc [kPa], rhoc [mol/L] 318.7232 5.0813398 !Reducing parameters [K, mol/L] 8.31451 !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 1.2279403 0.25 1. 0. !a(i),t(i),d(i),l(i) -3.3035623 1.125 1. 0. 1.2094019 1.5 1. 0. -0.12316 1.375 2. 0. 0.11044657 0.25 3. 0. 0.00032952153 0.875 7. 0. 0.27017629 0.625 2. 1. -0.062910351 1.75 5. 1. -0.3182889 3.625 1. 2. -0.099557419 3.625 4. 2. -0.036909694 14.5 3. 3. 0.019136427 12.0 4. 3. @EOS !---Equation of state--- FE1 !Helmholtz equation of state for sulfur hexafluoride of de Reuck et al. (1991). ? ?``````````````````````````````````````````````````````````````````````````````` ?de Reuck, K.M., Craven, R.J.B., and Cole, W.A., ? "Report on the Development of an Equation of State for Sulphur Hexafluoride," ? IUPAC Thermodynamic Tables Project Centre, London, 1991. ? ?The uncertainties of the equation of state are 0.1% in density, 2% in heat ? capacity, and 5% in the speed of sound, except in the critical region. ? !``````````````````````````````````````````````````````````````````````````````` 222.38 !Lower temperature limit [K] 525.0 !Upper temperature limit [K] 55000.0 !Upper pressure limit [kPa] 12.7 !Maximum density [mol/L] CP1 !Pointer to Cp0 model 146.0564 !Molar mass [g/mol] 222.38 !Triple point temperature [K] 224.36 !Pressure at triple point [kPa] 12.677 !Density at triple point [mol/L] 204.9 !Normal boiling point temperature [K] 0.21 !Acentric factor 318.733 3754.55 5.0926 !Tc [K], pc [kPa], rhoc [mol/L] 318.733 5.0926 !Reducing parameters [K, mol/L] 8.31448 !Gas constant [J/mol-K] 25 4 0 0 0 0 0 0 0 0 0 0 !# terms and # coefs/term for normal terms, Gaussian terms, and Gao terms 0.26945570453 0.0 1. 0. !a(i),t(i),d(i),l(i) -0.554046585076 1.5 1. 0. -0.929624636454 2.0 1. 0. 0.505661081063 0.0 2. 0. -0.683495847809 1.0 2. 0. 0.579161832426 2.0 2. 0. -0.122636218956 0.0 3. 0. -0.0260339227668 2.0 4. 0. 0.0222201648687 0.0 5. 0. -0.00118992341472 0.5 10. 0. 0.00292000609763 1.0 10. 0. -0.00243315775571 1.5 10. 0. 0.00068977829755 2.0 10. 0. -1.47585329235 3.0 2. 2. 2.75952303526 4.0 2. 2. -1.42721418498 5.0 2. 2. 0.0598794196648 5.0 3. 2. 0.00219991168025 1.0 7. 2. 0.00746554473361 5.0 7. 2. 0.00345233637389 1.0 9. 2. -0.0253226231963 9.0 4. 4. 0.0433906886402 14.0 4. 4. -0.0249349699078 24.0 4. 4. 0.00338560952242 24.0 6. 4. 0.0005399858997 9.0 4. 6. @AUX !---Auxiliary function for Cp0 CP1 !Ideal gas heat capacity function for sulfur hexafluoride of Cole and de Reuck (1990). ? ?``````````````````````````````````````````````````````````````````````````````` ?Cole, W.A. and de Reuck, K.M., ? "An interim analytic equation of state for sulfurhexafluoride," ? Int. J. Thermophysics, 11:189-199, 1990. doi: 10.1007/BF00503870 ? !``````````````````````````````````````````````````````````````````````````````` 0. ! 10000. ! 0. ! 0. ! 1.0 8.31448 !Reducing parameters for T, Cp0 1 5 0 0 0 0 0 !Nterms: polynomial, exponential, cosh, sinh 3.9837756784 0.0 ! = f1 term of Cole and de Reuck 2.218185101 1114.38 ! = f2, g2 coefficients -10.921337374 925.64 3.3102497939 499.26 17.5189671483 884.9 2.8903523803 1363.93 @EOS !---Equation of state--- FE2 !Helmholtz equation of state for sulfur hexafluoride of Polt et al. (1992). ? ?``````````````````````````````````````````````````````````````````````````````` ?Polt, A., Platzer, B., and Maurer, G., ? "Parameter der thermischen Zustandsgleichung von Bender fuer 14 ? mehratomige reine Stoffe," ? Chem. Tech. (Leipzig), 44(6):216-224, 1992. ? !``````````````````````````````````````````````````````````````````````````````` 222.38 !Lower temperature limit [K] 523.0 !Upper temperature limit [K] 40000.0 !Upper pressure limit [kPa] 13.133 !Maximum density [mol/L] CP2 !Pointer to Cp0 model 146.05 !Molar mass [g/mol] 222.38 !Triple point temperature [K] 236.73 !Pressure at triple point [kPa] 12.712 !Density at triple point [mol/L] 200.44 !Normal boiling point temperature [K] 0.1891 !Acentric factor 318.75 3764.1 4.9880178 !Tc [K], pc [kPa], rhoc [mol/L] 318.75 4.9880178 !Reducing parameters [K, mol/L] 8.3143 !Gas constant [J/mol-K] 22 5 0 0 0 0 0 0 0 0 0 0 !# terms and # coefs/term for normal terms, Gaussian terms, and Gao terms 0.131111896375 3. 0. 0. 0. !a(i),t(i),d(i),l(i) -0.792338803106 4. 0. 0. 0. 0.580899809209 5. 0. 0. 0. 1.53233600406 0. 1. 0. 0. -4.85096079094 1. 1. 0. 0. 4.82411603806 2. 1. 0. 0. -3.11285647219 3. 1. 0. 0. 0.442141211276 4. 1. 0. 0. 0.206313183222 0. 2. 0. 0. -0.372305169645 1. 2. 0. 0. 0.443536383059 2. 2. 0. 0. -0.047635485091 0. 3. 0. 0. 0.116313319336 1. 3. 0. 0. 0.0570240883234 0. 4. 0. 0. -0.152963195118 1. 4. 0. 0. 0.0259842094503 1. 5. 0. 0. -0.131111896375 3. 0. 2. 1.32678063 0.792338803106 4. 0. 2. 1.32678063 -0.580899809209 5. 0. 2. 1.32678063 -0.744763581796 3. 2. 2. 1.32678063 2.04368923925 4. 2. 2. 1.32678063 -1.2933532412 5. 2. 2. 1.32678063 @AUX !---Auxiliary function for Cp0 CP2 !Ideal gas heat capacity function for sulfur hexafluoride. ? ?``````````````````````````````````````````````````````````````````````````````` ?Polt, A., Platzer, B., and Maurer, G., ? !``````````````````````````````````````````````````````````````````````````````` 0. ! 10000. ! 0. ! 0. ! 1.0 146.05 !Reducing parameters for T, Cp0 3 0 0 0 0 0 0 !Nterms: polynomial, exponential, cosh, sinh -0.0376915 0.0 0.00305814 1.0 -0.00000237654 2.0 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ #ETA !---Viscosity--- VS4 !Pure fluid generalized friction theory viscosity model for sulfur hexafluoride of Quinones-Cisneros et al. (2012). :DOI: 10.1063/1.3702441 ? ?``````````````````````````````````````````````````````````````````````````````` ?Quiñones-Cisneros, S.E., Huber, M.L., and Deiters, U.K., ? "Correlation for the Viscosity of Sulfur Hexafluoride (SF6) from the Triple ? Point to 1000 K and Pressures to 50 MPa," ? J. Phys. Chem. Ref. Data, 41(2), 023102, 2012. doi: 10.1063/1.3702441 ? ?In the low-pressure (less than 0.33 MPa) region from 300 K to 700 K the estimated uncertainty ? is 0.3%. In the region from 300 K to 425 K for pressures less than 20 MPa, the estimated uncertainty ? is less than 1%. Where there were data available for validation at temperatures from 230 K to 575 K ? for pressures up to 50 MPa, the estimated uncertainty is 2%. The correlation extrapolates ? in a physically reasonable manner and may be used at pressures to 100 MPa and temperatures ? from the triple point to 1000 K. ? !``````````````````````````````````````````````````````````````````````````````` 223.555 !Lower temperature limit [K] 1000.0 !Upper temperature limit [K] 100000.0 !Upper pressure limit [kPa] 14.5 !Maximum density [mol/L] 6 0 0 0 0 0 !Number of terms associated with dilute-gas function NUL !Pointer to reduced effective collision cross-section model; not used 0.5218 !Lennard-Jones coefficient sigma [nm] (not used) 222.1 !Lennard-Jones coefficient epsilon/kappa [K] (not used) 318.7232 0.001 !Reducing parameters for T, eta 0.0 0.5 !Chapman-Enskog term; not used here 118561.16699351955 0.0 !Empirical eta0 terms -378102.73635338076 0.25 416427.9031538455 0.50 -165294.7340464616 0.75 24538.07646056496 1.0 0 !Number of terms for initial density dependence -0.000687811175736081 0.0008226610400301656 -0.00035486706526579556 0. 0. ! a(0),a(1),a(2) 0.00017273725029313174 -0.00020244781619303473 0.00019595249965414938 0. 0. ! b(0),b(1),b(2) 0.000053878327830358164 1.6380545026985154e-6 -0.000020815988636242458 0. 0. ! c(0),c(1),c(2) 9.995629603356937e-8 -9.641674089199906e-9 -7.541957772276217e-9 0. 0. ! A(0),A(1),A(2) -8.982564893670087e-8 -8.494276469212978e-8 0.0 0. 0. ! B(0),B(1),B(2) -8.534317761264114e-6 0.000011440365750572709 -5.657623737235593e-6 0. 0. ! C(0),C(1),C(2) 0.0 0.0 2.2798018358592354e-11 0. 1. ! D(0),D(1),D(2) 0.0 -5.6940155341869364e-11 2.921901268228413e-11 0. 1. ! E(0),E(1),E(2) NUL !Pointer to the viscosity critical enhancement auxiliary function (none used) ================================================================================ #TCX !---Thermal conductivity--- TC1 !Pure fluid thermal conductivity model for sulfur hexafluoride of Assael et al. (2012). :DOI: 10.1063/1.4708620 ? ?``````````````````````````````````````````````````````````````````````````````` ?Assael, M.J., Koini, I.A., Antoniadis, K.D., Huber, M.L., Abdulagatov, I.M., and Perkins, R.A., ? "Reference Correlation of the Thermal Conductivity of Sulfur Hexafluoride ? from the Triple Point to 1000 K and up to 150 MPa," ? J. Phys. Chem. Ref. Data, 41, 023104, 2012. doi: 10.1063/1.4708620 Also see erratum, submitted 2014. ? ?The overall uncertainty is estimated, for pressures less than 150 MPa and temperatures less than 1000 K, ? to be less than 4%. ? !``````````````````````````````````````````````````````````````````````````````` 223.55 !Lower temperature limit [K] 1000.0 !Upper temperature limit [K] 150000.0 !Upper pressure limit [kPa] 14.5 !Maximum density [mol/L] 4 3 !# terms for dilute gas function: numerator, denominator 1.0 0.001 !Reducing parameters for T, tcx 1461860.0 0. -18539.4 1. 77.7891 2. 0.0241059 3. 29661.7 0. 505.67 1. 1.0 2. 10 0 !# terms for background gas function: numerator, denominator 318.7232 5.0823 1. !Reducing parameters for T, rho, tcx -0.0283746 0. 1. 0. 0.0207472 0. 2. 0. -0.0055718 0. 3. 0. 0.0053289 0. 4. 0. -0.00161688 0. 5. 0. 0.0352768 1. 1. 0. -0.0433053 1. 2. 0. 0.0512084 1. 3. 0. -0.0290262 1. 4. 0. 0.00598438 1. 5. 0. TK3 !Pointer to critical enhancement auxiliary function #AUX !---Auxiliary function for the thermal conductivity critical enhancement TK3 !Simplified thermal conductivity critical enhancement for sulfur hexafluoride of Assael et al. (2012). ? ?``````````````````````````````````````````````````````````````````````````````` ?Assael, M.J., Koini, I.A., Antoniadis, K.D., Huber, M.L., Abdulagatov, I.M., and Perkins, R.A., 2012. ? !``````````````````````````````````````````````````````````````````````````````` 0. ! 10000. ! 0. ! 0. ! 9 0 0 0 !# terms: terms, spare, spare, spare 1.0 1.0 1.0 !Reducing parameters for T, rho, tcx [mW/(m-K)] 0.63 !Nu (universal exponent) 1.2415 !Gamma (universal exponent) 1.01 !R0 (universal amplitude) 0.065 !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) 0.19e-9 !Xi0 (amplitude) [m] 0.052 !Gam0 (amplitude) [-] 0.35e-9 !Qd_inverse (modified effective cutoff parameter) [m] 478.08 !Tref (reference temperature) [K] ******************************************************************************** @ETA !---Viscosity--- VS1 !Pure fluid viscosity model for sulfur hexafluoride of Hafer (1999). ? ?``````````````````````````````````````````````````````````````````````````````` ?Hafer, R.F., Torsional crystal viscometry: Wide ranging resonance measurements ? and feasability study of transient-decay measurements, MSc Thesis, Dept. Chem. Eng. Univ. Colorado (1999) ? !``````````````````````````````````````````````````````````````````````````````` 223.555 !Lower temperature limit [K] 625.0 !Upper temperature limit [K] 150000.0 !Upper pressure limit [kPa] 14.5 !Maximum density [mol/L] 1 !Number of terms associated with dilute-gas function CI1 !Pointer to reduced effective collision cross-section model 0.52451 !Lennard-Jones coefficient sigma [nm] 211.43 !Lennard-Jones coefficient epsilon/kappa [K] 1.0 1.0 !Reducing parameters for T, eta 0.32263 0.5 !=0.0266957*SQRT(MW) [Chapman-Enskog term] 9 !Number of terms for initial density dependence 211.43 0.08690 !Reducing parameters for T (=eps/k), etaB2 (= 0.6022137*sigma**3) -19.572881 0.0 !Coefficient, power in T* = T/(eps/k) 219.73999 -0.25 -1015.3226 -0.5 2471.0125 -0.75 -3375.1717 -1.0 2491.6597 -1.25 -787.26086 -1.5 14.085455 -2.5 -0.34664158 -5.5 -2 4 1 2 0 0 !# resid terms: close-packed density; simple poly; numerator of rational poly; denominator of rat. poly; numerator of exponential; denominator of exponential 318.7232 5.0823 1000.0 !Reducing parameters for T, rho, eta 2.91772 0.0 !Alternative form for del10; numerator term -0.0741208 0.5 !Alternative form for del10; denominator terms -0.043169 0.0 1. 0. 0 ! beta1; powers of tau, del, del0; power of del in exponential [0 indicated no exponential term present] 0.0061884 0.0 2. 0. 0 ! beta2 -0.00542764 0.0 3. 0. 0 ! beta3 -0.0 0.0 1. -1. 0 ! beta7 0.140519 0.0 1. 0. 0 ! beta7 in non-simple poly term 1.0 0.0 0. 1. 0 ! del0 term in denominator -1.0 0.0 1. 0. 0 ! -del term in denominator NUL !Pointer to the viscosity critical enhancement auxiliary function (none used) @AUX !---Auxiliary function for the collision integral CI1 !Reduced effective collision cross-section model (empirical form in log(T*)) for sulfur hexafluoride. ? ?``````````````````````````````````````````````````````````````````````````````` ? !``````````````````````````````````````````````````````````````````````````````` 0. ! 10000. ! 0. ! 0. ! 5 !Number of terms 0.4450251 0 !Coefficient, power of Tstar -0.5079322 1 0.1285776 2 -0.008328165 3 -0.002713173 4 @ETA !---Viscosity--- VS7 !Pure fluid viscosity model for sulfur hexafluoride of Altunin (1984). ? ?``````````````````````````````````````````````````````````````````````````````` ?Altunin, V.V., "Equation for the viscosity of sulfur hexafluoride for a ? broad range of temperatures and presurs, Tr. Mosk., Energ. Inst., 1984,622, pp12-18 ? !``````````````````````````````````````````````````````````````````````````````` 223.555 !Lower temperature limit [K] 625.0 !Upper temperature limit [K] 150000.0 !Upper pressure limit [kPa] 14.5 !Maximum density [mol/L] NUL !Omega model ! !Residual function $RF RED SUM:3 SUMEX:10 * ! !Coefficients $CF 1.0 318.7 5.05287653 0. 0 !Reducing parameters for eta, T, rho 0.486 0. 0. 0. 0 !Dilute gas terms 17.075 1. 0. 0. 0 -1.3976 2. 0. 0. 0 0.911990483 0. 1. 0. 0 !Simple polynomial terms -3.62880599 0. 2. 0. 0 4.68880707 0. 3. 0. 0 -2.04822413 0. 4. 0. 0 0.299289894 0. 5. 0. 0 -0.798662631 -1. 1. 0. 0 5.48041104 -1. 2. 0. 0 -6.15316823 -1. 3. 0. 0 2.58614144 -1. 4. 0. 0 -0.369541671 -1. 5. 0. 0 NUL !Pointer to the viscosity critical enhancement auxiliary function (none used) ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ @TRN !---ECS Transport--- ECS !Extended Corresponding States model (Propane reference); predictive mode for sulfur hexafluoride. ? ?``````````````````````````````````````````````````````````````````````````````` ?*** ESTIMATION METHOD *** NOT STANDARD REFERENCE QUALITY *** ?Unpublished; uses method described in the following reference: ?Huber, M.L., Laesecke, A., and Perkins, R.A. ? "Model for the Viscosity and Thermal Conductivity of Refrigerants, Including ? a New Correlation for the Viscosity of R134a," ? Ind. Eng. Chem. Res., 42(13):3163-3178, 2003. doi: 10.1021/ie0300880 ? ?The Lennard-Jones parameters were estimated from Reid, Prausnitz & Sherwood (1977). ? !``````````````````````````````````````````````````````````````````````````````` 223.55 !Lower temperature limit [K] 1000.0 !Upper temperature limit [K] 150000.0 !Upper pressure limit [kPa] 14.5 !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) 0.5128 !Lennard-Jones coefficient sigma [nm] for ECS method 222.1 !Lennard-Jones coefficient epsilon/kappa [K] for ECS method 1 0 0 !Number of terms in f_int term in Eucken correlation, spare1, spare2 0.00132 0. 0. 0. !Coefficient, power of T, spare1, spare2 1 0 0 !Number of terms in psi (visc shape factor): poly,spare1,spare2 1.0 0. 0. 0. !Coefficient, power of Tr, power of Dr, spare 1 0 0 !Number of terms in chi (t.c. shape factor): poly,spare1,spare2 1.0 0. 0. 0. !Coefficient, power of Tr, power of Dr, spare TK3 !Pointer to critical enhancement auxiliary function ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #DE !---Dielectric constant--- DE3 !Dielectric constant model for SF6 of Harvey and Mountain (2017). :DOI: 10.1007/s10765-017-2279-6 ? ?``````````````````````````````````````````````````````````````````````````````` ?Harvey, A.H. and Mountain, R.D., ? "Correlations for the Dielectric Constants of H2S, SO2, and SF6," ? Int. J. Thermophys., 38:147, 2017. ? !``````````````````````````````````````````````````````````````````````````````` 0. ! 10000. ! 0. ! 0. ! 273.16 1000.0 1.0 !Reducing parameters for T and D 0 1 4 0 0 0 !Number of terms in dielectric constant model 16.5 0. 1. 0. !Coefficient, T exp, D exp 69.2 0. 2. 0. 38.8 1. 2. 0. -177.9 0. 2.2 0. -171.9 1. 2.2 0. #STN !---Surface tension--- ST1 !Surface tension model for sulfur hexafluoride of Mulero et al. (2012). :DOI: 10.1063/1.4768782 ? ?``````````````````````````````````````````````````````````````````````````````` ?Mulero, A., Cachadiña, I., and Parra, M.I., ? "Recommended Correlations for the Surface Tension of Common Fluids," ? J. Phys. Chem. Ref. Data, 41(4), 043105, 2012. doi: 10.1063/1.4768782 ? !``````````````````````````````````````````````````````````````````````````````` 0. ! 10000. ! 0. ! 0. ! 2 !Number of terms in surface tension model 318.723 !Critical temperature used in fit (dummy) 0.0538 1.271 !Sigma0 and n -0.00004064 0.2116 #MLT !---Melting line--- ML1 !Melting line model for sulfur hexafluoride of Harvey (2017). :DOI: 10.1063/1.5005537 ? ?``````````````````````````````````````````````````````````````````````````````` ?Harvey, A.H., ? "On the Melting Curve of Sulfur Hexafluoride," ? J. Phys. Chem. Ref. Data, 46(4), 043102, 2017. ? !``````````````````````````````````````````````````````````````````````````````` 223.555 !Lower temperature limit [K] 650.0 !Upper temperature limit [K] 0. ! 0. ! 223.555 231.429 !Reducing temperature and pressure 3 0 0 0 0 0 !Number of terms in melting line equation 1.0 0.0 !Coefficients and exponents 966.603148 1.555 -966.603148 0.0 #SBL !---Sublimation line--- SB2 !Sublimation line model for sulfur hexafluoride of Guder and Wagner (2009). :DOI: 10.1063/1.3037344 ? ?``````````````````````````````````````````````````````````````````````````````` ?Guder, C. and Wagner, W., 2009. ? !``````````````````````````````````````````````````````````````````````````````` 0. ! 223.555 !Upper temperature limit [K] 0. ! 0. ! 223.555 231.429 !Reducing temperature and pressure 2 0 0 0 0 0 !Number of terms in sublimation line equation -11.6942141 -1.07 !Coefficients and exponents 11.6942141 0.0 !Coefficients and exponents #PS !---Vapor pressure--- PS5 !Vapor pressure equation for sulfur hexafluoride of Guder and Wagner (2009). ? ?``````````````````````````````````````````````````````````````````````````````` ?Guder, C. and Wagner, W., 2009. ? ?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. ! 318.7232 3754.983 !Reducing parameters 5 0 0 0 0 0 !Number of terms in equation -7.09634642 1.0 1.676662 1.5 -2.3921599 2.5 5.86078302 4.0 -9.02978735 4.5 #DL !---Saturated liquid density--- DL6 !Saturated liquid density equation for sulfur hexafluoride of Guder and Wagner (2009). ? ?``````````````````````````````````````````````````````````````````````````````` ?Guder, C. and Wagner, W., 2009. ? ?Functional Form: D=Dc*EXP[SUM(Ni*Theta^(ti/3))*Tc/T] 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. ! 318.7232 5.0823174112 !Reducing parameters 4 0 0 0 0 0 !Number of terms in equation 2.31174688 1.065 -1.12912486 1.5 -1.439347 4.0 0.282489982 5.0 #DV !---Saturated vapor density--- DV6 !Saturated vapor density equation for sulfur hexafluoride of Guder and Wagner (2009). ? ?``````````````````````````````````````````````````````````````````````````````` ?Guder, C. and Wagner, W., 2009. ? ?Functional Form: D=Dc*EXP[SUM(Ni*Theta^(ti/3))*Tc/T] 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. ! 318.7232 5.0823174112 !Reducing parameters 6 0 0 0 0 0 !Number of terms in equation 23.68063442 1.044 0.513062232 0.5 -24.4706238 1.0 -4.6715244 2.0 -1.7536843 8.0 -6.65585369 17.0 @END c 1 2 3 4 5 6 7 8 c2345678901234567890123456789012345678901234567890123456789012345678901234567890 @ETA !Viscosity model specification VS0 pure fluid viscosity model of Altunin (1984). ? ?``````````````````````````````````````````````````````````````````````````````` ?Altunin, V.V., "Equation for the viscosity of sulfur hexafluoride for a ? broad range of temperatures and presurs, Tr. MOsk., Energ. Inst., 1984,622, pp12-18 ? !``````````````````````````````````````````````````````````````````````````````` 223.555 !Lower temperature limit [K] 625.0 !Upper temperature limit [K] 150000.0 !Upper pressure limit [kPa] 14.5 !Maximum density [mol/L] SF6 !Pointer to hardcoded viscosity model 0 1 1 0 0 0 0 0 !Number of terms for various pieces 1.0 1.0 1.0 !Reducing parameters for T, rho, eta 0. 0. 0. 0. 0 !Dilute gas coeffs 0. 0. 0. 0. 0 !Residual coeffs NUL !Pointer to the viscosity critical enhancement auxiliary function (none used) #MLT !---Melting line--- ML1 !Melting line model for sulfur hexafluoride of Guder and Wagner (2009). ? ?``````````````````````````````````````````````````````````````````````````````` ?Guder, C. and Wagner, W. ? "A Reference Equation of State for the Thermodynamic Properties of Sulfur ? Hexafluoride (SF6) for Temperatures from the Melting Line to 625 K and ? Pressures up to 150 MPa," ? J. Phys. Chem. Ref. Data, 38(1):33-94, 2009. ? !``````````````````````````````````````````````````````````````````````````````` 223.555 !Lower temperature limit [K] 650.0 !Upper temperature limit [K] 0. ! 0. ! 223.555 231.429 !Reducing temperature and pressure 5 0 0 0 0 0 !Number of terms in melting line equation 1.0 0.0 !Coefficients and exponents -30.0468473 -20.0 30.0468473 0.0 359.771253 3.25 -359.771253 0.0