Stability of Hydrogen Fluoride Under Water-Gas-Reaction Conditions

  • V. V. KapustinEmail author
  • D. S. Pashkevich
  • V. A. Talalov
  • D. A. Mukhortov
  • Yu. I. Alekseev
  • V. B. Petrov
  • P. S. Kambur
  • M. P. Kambur
  • O. N. Voznyuk

The prime objective of the investigation was to prove the stability of hydrogen fluoride under water-gas-reaction conditions. Calculations of the thermodynamically equilibrium composition of substances in the system of elements C–H–F–O were conducted, and it has been shown that with excess carbon and at a temperature of 1000 to 2000 K, the basic components of the mixture are carbon mono- and dioxide, hydrogen, methane, and hydrogen fluoride, and carbon fluorides and oxyfluorides are absent. At a temperature above 1300 K, the thermodynamically equilibrium mixture consists of carbon monoxide, hydrogen, and hydrogen fluoride. Calculation results have been confirmed by laboratory experiments in which the only fluorine-containing substance, i.e., hydrogen fluoride, was found as part of the products of interaction of water and carbon in the presence of hydrogen fluoride at a temperature of the order of 1500 K. The obtained results can become a basis for the technology of obtaining anhydrous hydrogen fluoride from its aqueous solutions, including the azeotropic one, by high-temperature interaction of the steam and carbon at


hydrogen fluoride carbon water-gas reaction heterogeneous combustion 


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Authors and Affiliations

  • V. V. Kapustin
    • 1
    Email author
  • D. S. Pashkevich
    • 1
  • V. A. Talalov
    • 1
  • D. A. Mukhortov
    • 2
  • Yu. I. Alekseev
    • 3
  • V. B. Petrov
    • 2
  • P. S. Kambur
    • 2
  • M. P. Kambur
    • 2
  • O. N. Voznyuk
    • 2
  1. 1.Peter the Great St. Petersburg Polytechnic UniversitySt. PetersburgRussia
  2. 2.Russian Scientific Center “Applied Chemistry”St. PetersburgRussia
  3. 3.Limited Liability Company “New Chemical Products”St. PetersburgRussia

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