sulfur hexafluoride !short name 2551-62-4 !CAS number sulfur hexafluoride !full name SF6 !chemical formula {F6S} sulfur fluoride !synonym 146.0554192 !molecular weight [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] 0.21 !acentric factor 0.0 !dipole moment [Debye] IIR !default reference state 8.0 !version number 1080 !UN Number ! compiled by M. McLinden, NIST Physical and Chemical Properties Division, Boulder, Colorado ! 03-14-97 MM, original version ! 10-24-97 MM, read in f_int term in Eucken correlation in ECS method for t.c. ! change reference fluid EOS for ECS-transport from BWR to FEQ ! 08-11-98 MM, update format to version 6.001 ! 08-24-98 EWL, change EOS to that of de Reuck et al. (1991). ! 11-13-98 EWL, update format to version 6.1 ! 11-18-98 EWL, add equation of state of Polt et al. (1992) ! 10-14-99 EWL, add L-J parameters ! 10-05-06 EWL, add Guder and Wagner eos #EOS !equation of state specification FEQ Helmholtz equation of state for sulfur hexafluoride of Guder and Wagner (2007). ?LITERATURE REFERENCE \ ?Guder, C. and Wagner, W. ? "A Reference Equation of State for the Thermodynamic Properties of Sulfur ? Hexafluoride for Temperatures from the Melting Line to 625 K and Pressures ? up to 150 MPa," ? to be submitted to J. Phys. Chem. Ref. Data, 2007. ?\ ?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%. ?\ !end of info section 223.555 !lower temperature limit [K] 625.0 !upper temperature limit [K] 150000.0 !upper pressure limit [kPa] 12.64 !maximum density [mol/L] PH0 !pointer to Cp0 model 146.0554192 !molecular weight [g/mol] 223.555 !triple point temperature [K] 231.4 !pressure at triple point [kPa] 12.63 !density at triple point [mol/L] 204.9 !normal boiling point temperature [K] 0.21 !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 !# terms, # coeff/term for: "normal" terms, critical, spare .54958259132835D+00 0.125 1. 0 !a(i),t(i),d(i),l(i) -.87905033269396D+00 1.25 1. 0 -.84656969731452D+00 1.875 1. 0 .27692381593529D+00 0.125 2. 0 -.49864958372345D+01 1.5 2. 0 .48879127058055D+01 1.625 2. 0 .36917081634281D-01 1.5 3. 0 .37030130305087D-03 5.625 3. 0 .39389132911585D-01 0.625 4. 0 .42477413690006D-03 0.25 6. 0 -.24150013863890D-01 6.0 1. 1 .59447650642255D-01 0.25 2. 1 -.38302880142267D+00 4.75 2. 1 .32606800951983D+00 5.375 2. 1 -.29955940562031D-01 5.875 3. 1 -.86579186671173D-01 2.0 6. 1 .41600684707562D+01 5.875 2. 2 -.41398128855814D+01 6.0 2. 2 -.55842159922714D+00 5.625 4. 2 .56531382776891D+00 5.75 4. 2 .82612463415545D-02 0.0 2. 3 -.10200995338080D-01 0.5 2. 3 -.21662523861406D-01 4. 1. 2 2 -10. -150. 1.13 .85 0. 0. 0. .34650943893908D-01 1. 3. 2 2 -10. -150. 1.13 .85 0. 0. 0. -.28694281385812D-01 3. 4. 2 2 -10. -150. 1.13 .85 0. 0. 0. .84007238998053D-02 2. 1. 2 2 -10. -150. 1.16 .85 0. 0. 0. -.26969359922498D+00 4. 1. 2 2 -11. -225. 1.19 1.0 0. 0. 0. .90415215646344D+01 3. 4. 2 2 -25. -300. 1.19 1.0 0. 0. 0. -.37233103557977D+01 4. 3. 2 2 -30. -350. 1.16 1.0 0. 0. 0. -.27524670823704D+04 1. 4. 2 2 -30. -350. 1.16 1.0 0. 0. 0. .57711861697319D+04 2. 4. 2 2 -30. -350. 1.16 1.0 0. 0. 0. -.30234003119748D+04 3. 4. 2 2 -30. -350. 1.16 1.0 0. 0. 0. .22252778435360D+07 3. 1. 2 2 -30. -400. 1.22 1.0 0. 0. 0. -.23056065559032D+07 4. 1. 2 2 -30. -400. 1.22 1.0 0. 0. 0. .63918852944475D+07 3. 3. 2 2 -30. -400. 1.22 1.0 0. 0. 0. -.60792091415592D+07 4. 3. 2 2 -30. -400. 1.22 1.0 0. 0. 0. #AUX !auxiliary model specification PH0 Helmholtz form for the ideal-gas state of Guder and Wagner (2006). ?LITERATURE REFERENCE \ ?see EOS for reference. ?\ !end of info section 100. !lower temperature limit [K] 1000. !upper temperature limit [K] 0.0 !upper pressure limit [kPa] 0.0 !maximum density [mol/L] 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 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 specification FE1 Helmholtz equation of state for sulfur hexafluoride of de Reuck et al. (1991). ?LITERATURE REFERENCE \ ?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. ?\ !end of info section 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 !molecular weight [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 !# terms, # coeff/term for: "normal" terms, critical, spare 0.269455704530d+00 0.000 1.00 0 !a(i),t(i),d(i),l(i) -0.554046585076d+00 1.500 1.00 0 -0.929624636454d+00 2.000 1.00 0 0.505661081063d+00 0.000 2.00 0 -0.683495847809d+00 1.000 2.00 0 0.579161832426d+00 2.000 2.00 0 -0.122636218956d+00 0.000 3.00 0 -0.260339227668d-01 2.000 4.00 0 0.222201648687d-01 0.000 5.00 0 -0.118992341472d-02 0.500 10.00 0 0.292000609763d-02 1.000 10.00 0 -0.243315775571d-02 1.500 10.00 0 0.689778297550d-03 2.000 10.00 0 -0.147585329235d+01 3.000 2.00 2 0.275952303526d+01 4.000 2.00 2 -0.142721418498d+01 5.000 2.00 2 0.598794196648d-01 5.000 3.00 2 0.219991168025d-02 1.000 7.00 2 0.746554473361d-02 5.000 7.00 2 0.345233637389d-02 1.000 9.00 2 -0.253226231963d-01 9.000 4.00 4 0.433906886402d-01 14.000 4.00 4 -0.249349699078d-01 24.000 4.00 4 0.338560952242d-02 24.000 6.00 4 0.539985899700d-03 9.000 4.00 6 #AUX !auxiliary model specification CP1 ideal gas heat capacity function of Cole and de Reuck (1990). ?LITERATURE REFERENCE \ ?Cole, W.A. and de Reuck, K.M., ? "An interim analytic equation of state for sulfurhexafluoride," ? Int. J. Thermophysics, 11:189-199, 1990. ?\ !end of info section 100.0 !lower temperature limit [K] 6000.0 !upper temperature limit [K] 0.0 !upper pressure limit [kPa] 0.0 !maximum density [mol/L] 1.0 8.31448 !reducing parameters for T, Cp0 1 5 0 0 0 0 0 !Nterms: polynomial, exponential, cosh, sinh 3.9837756784d0 0.00 != f1 term of Cole and de Reuck 2.2181851010d0 1114.38d0 != f2, g2 coefficients -1.0921337374d1 925.64d0 3.3102497939d0 499.26d0 17.5189671483d0 884.90d0 2.8903523803d0 1363.93d0 @EOS !equation of state specification FES short Helmholtz equation of state for sulfur hexafluoride of Span and Wagner (2003). ?LITERATURE REFERENCE \ ?Span, R. and Wagner, W. ? "Equations of State for Technical Applications. II. Results for Nonpolar Fluids," ? Int. J. Thermophys., 24(1):41-109, 2003. ?\ ?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. ?\ !end of info section 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 !molecular weight [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 !# terms, # coeff/term for: "normal" terms, critical, spare 0.122794030000E+01 0.25 1.0 0 !a(i),t(i),d(i),l(i) -0.330356230000E+01 1.125 1.0 0 0.120940190000E+01 1.5 1.0 0 -0.123160000000E+00 1.375 2.0 0 0.110446570000E+00 0.25 3.0 0 0.329521530000E-03 0.875 7.0 0 0.270176290000E+00 0.625 2.0 1 -0.629103510000E-01 1.75 5.0 1 -0.318288900000E+00 3.625 1.0 2 -0.995574190000E-01 3.625 4.0 2 -0.369096940000E-01 14.5 3.0 3 0.191364270000E-01 12.0 4.0 3 @EOS !equation of state specification FE2 Helmholtz equation of state for sulfur hexafluoride of Polt et al. (1992). ?LITERATURE REFERENCE \ ?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. ?\ !end of info section 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 !molecular weight [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 !# terms, # coeff/term for: "normal" terms, critical, spare 0.131111896375d+0 3.0 0.0 0 0.0 !a(i),t(i),d(i),l(i) -0.792338803106d+0 4.0 0.0 0 0.0 0.580899809209d+0 5.0 0.0 0 0.0 0.153233600406d+1 0.0 1.0 0 0.0 -0.485096079094d+1 1.0 1.0 0 0.0 0.482411603806d+1 2.0 1.0 0 0.0 -0.311285647219d+1 3.0 1.0 0 0.0 0.442141211276d+0 4.0 1.0 0 0.0 0.206313183222d+0 0.0 2.0 0 0.0 -0.372305169645d+0 1.0 2.0 0 0.0 0.443536383059d+0 2.0 2.0 0 0.0 -0.476354850910d-1 0.0 3.0 0 0.0 0.116313319336d+0 1.0 3.0 0 0.0 0.570240883234d-1 0.0 4.0 0 0.0 -0.152963195118d+0 1.0 4.0 0 0.0 0.259842094503d-1 1.0 5.0 0 0.0 -0.131111896375d+0 3.0 0.0 2 1.32678063 0.792338803106d+0 4.0 0.0 2 1.32678063 -0.580899809209d+0 5.0 0.0 2 1.32678063 -0.744763581796d+0 3.0 2.0 2 1.32678063 0.204368923925d+1 4.0 2.0 2 1.32678063 -0.129335324120d+1 5.0 2.0 2 1.32678063 #AUX !auxiliary model specification CP2 ideal gas heat capacity function ?LITERATURE REFERENCE \ ?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. ?\ !end of info section 222.38 !lower temperature limit [K] 523.0 !upper temperature limit [K] 0.0 !upper pressure limit [kPa] 0.0 !maximum density [mol/L] 1.0 146.05 !reducing parameters for T, Cp0 3 0 0 0 0 0 0 !Nterms: polynomial, exponential, cosh, sinh -0.376915d-1 0.00 0.305814d-2 1.00 -0.237654d-5 2.00 #STN !surface tension specification ST1 surface tension model of Rathjen and Straub (1977). ?LITERATURE REFERENCE \ ?Rathjen, W. and Straub, J., ? "Surface tension and refractive index of six refrigerants from triple point ? up to the critical point," ? 7th Symposium on Thermophysical Properties, Gaithersburg, Maryland, ? American Society of Mechanical Engineers, 839-850, 1977. ?\ !end of info section 223.554 !lower temperature limit [K] 318.733 !upper temperature limit [K] 0.0 !(dummy) upper pressure limit 0.0 !(dummy) maximum density 2 !number of terms in surface tension model 318.63 !critical temperature used by Rathjen and Straub (dummy) 0.05488 1.289 !sigma0, mu -1.62445d-3 1.799 !(sigma0*b1), (mu+delta) @END c 1 2 3 4 5 6 7 8 c2345678901234567890123456789012345678901234567890123456789012345678901234567890 0.5128 !Lennard-Jones coefficient sigma [nm] for ECS method 222.1 !Lennard-Jones coefficient epsilon/kappa [K] for ECS method