Chemical Papers

, Volume 68, Issue 12, pp 1767–1773 | Cite as

Measurement of critical heat flux conditions under vacuum

  • Lenka Nemsilová
  • Pavol TimárJr.
  • Pavel TimárEmail author
  • Ján Stopka
  • Ladislav Štibrányi
  • Vladimír Báleš
Original Paper


Determination of optimum conditions for waste oil (used motor oils, transformer oils) regeneration using vacuum distillation was attempted including the search for the optimum temperature difference between the heating surface and the boiling point of the liquid. Optimum temperature allowed the distillation equipment to operate at maximum performance. Equipment suitable for the measurement of boiling curves under atmospheric pressure and vacuum conditions was assembled. These curves were used to determine the optimum temperature difference of various substances including waste oils. Properties of pure substances, for example water, ethanol, hexane, heptane, isooctane, decane, or dodecane, were measured with this equipment under atmospheric pressure. Results of various liquids measurements under vacuum and atmospheric pressure are presented.


waste oils boiling curve boiling regime optimum temperature 


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Copyright information

© Institute of Chemistry, Slovak Academy of Sciences 2014

Authors and Affiliations

  • Lenka Nemsilová
    • 1
  • Pavol TimárJr.
    • 1
  • Pavel Timár
    • 1
    Email author
  • Ján Stopka
    • 1
  • Ladislav Štibrányi
    • 1
  • Vladimír Báleš
    • 1
  1. 1.Institute of Chemical and Environmental Engineering, Faculty of Chemical and Food TechnologySlovak University of Technology in BratislavaBratislavaSlovakia

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