Vapor liquid equilibrium measurements for clean fuel processes

No Thumbnail Available
Journal Title
Journal ISSN
Volume Title
Doctoral thesis (article-based)
Checking the digitized thesis and permission for publishing
Instructions for the author
Degree programme
44, [app]
Chemical engineering report series, Kemian laitetekniikan raporttisarja, 48
This thesis is based on seven publications dealing with the Vapor Liquid Equilibrium (VLE) measurements which are necessary for pure components process. Two VLE measurements sections were comprised in this thesis. Firstly, VLE runs were conducted with a circulation still at both atmospheric pressure and isothermal conditions under low atmospheric pressure. Secondly, the static apparatus has been used in isothermal VLE for six binary pairs of C4 hydrocarbons and 2-propanone in a range from 69.6 kPa to 610.9 kPa. In addition, the VLE modeling was considered to determine the parameters in thermodynamic models. The selected components are in area of great industrial interest in view of developing gasoline additives to replace MTBE (2-methoxy-2-methylpropane), such as transform old MTBE plants to produce isooctene. Especially ETBE (2-Ethoxy-2-methylpropane) has emerged as an alternative to MTBE, because ETBE can be produced from ethanol made of renewable resources. The experimental data were correlated using activity coefficient models for the liquid phase and equation of state (EOS) for the vapor phase. These models were also compared with a predictive activity coefficient models. The estimations made with various different predictive coefficient models gave worse description of the measurements than by fitting the data with the Wilson equation. The experimental apparatus and the procedure presented were shown to be reliable, particularly the computer-controlled static apparatus. Moreover, these results seem to be reliable since they passed thermodynamic consistency tests. Most VLE and excess enthalpy measurements in this thesis are for binary systems that have not been measured previously.
Other note
  • Uusi-Kyyny, P., Tarkiainen, V., Kim, Y., Ketola, R. A. and Aittamaa, J., 2003. Vapor liquid equilibria for ethanol + 2,4,4-trimethyl-1-pentene and 2-propanol + 2,4,4-trimethyl-1-pentene at 101 kPa. Journal of Chemical and Engineering Data 48, pages 280-285.
  • Pokki, J.-P., Řehák, K., Kim, Y., Matouš, J. and Aittamaa, J., 2003. Vapor-liquid equilibrium data at 343 K and excess molar enthalpy data at 298 K for the binary systems of ethanol + 2,4,4-trimethyl-1-pentene and 2-propanol + 2,4,4-trimethyl-1-pentene. Journal of Chemical and Engineering Data 48, pages 75-80.
  • Kim, Y., Pokki, J.-P., Řehák, K., Matouš, J. and Aittamaa, J., 2004. Excess enthalpy and vapor-liquid equilibrium at atmospheric pressure for the binary systems 2-methyl-2-propanol + 2,4,4-trimethyl-1-pentene and 2-butanol + 2,4,4-trimethyl-1-pentene. Journal of Chemical and Engineering Data 49, pages 246-250.
  • Kim, Y., Keskinen, K. I. and Aittamaa, J., 2004. Vapor-liquid equilibrium for binary systems 2-propanol + 2-ethoxy-2-methylpropane and ethyl ethanoate + 2-ethoxy-2-methylpropane at 333 K and 2-propanone + 2-ethoxy-2-methylpropane at 323 K. Journal of Chemical and Engineering Data 49, pages 1273-1278.
  • Kim, Y., Uusi-Kyyny, P., Pokki, J.-P., Pakkanen, M., Multala, R., Westerlund, L. M. and Aittamaa, J., 2004. Isothermal vapour-liquid equilibrium measurements for six binary systems of C4 hydrocarbons + 2-propanone. Fluid Phase Equilibria 226, pages 173-181.
  • Uusi-Kyyny, P., Pokki, J.-P., Kim, Y. and Aittamaa, J., 2004. Isobaric vapor liquid equilibrium for 2,3-dimethyl-2-butene + methanol, + ethanol, + 2-propanol, or + 2-butanol at atmospheric pressure. Journal of Chemical and Engineering Data 49, pages 251-255.
  • Kim, Y., Sapei, E., Keskinen, K. I. and Aittamaa, J., 2005. Vapor-liquid equilibrium for binary systems of 2-propanol + 1,1-diethoxyethane at 353 K, ethyl ethanoate + 1,1-diethoxyethane at 348 K, and 2-propanone + 1,1-diethoxyethane at 328 K. Journal of Chemical and Engineering Data, accepted for publication on 13.12.2004.
Permanent link to this item