Affordable Access

Publisher Website

Revaluation of equilibrium quotient between titanium ions and metallic titanium in NaCl–KCl equimolar molten salt

Authors
Journal
Journal of Alloys and Compounds
0925-8388
Publisher
Elsevier
Publication Date
Volume
509
Issue
18
Identifiers
DOI: 10.1016/j.jallcom.2011.02.090
Keywords
  • Equilibrium Constant
  • Solubility Product
  • Disproportionation Reaction
  • Absorption Spectroscopy

Abstract

Abstract In this study, the effect of oxide ion on the equilibrium between titanium ions and metallic titanium was investigated in NaCl–KCl equimolar molten salt. The soluble species containing Ti 3+ and O 2− was not confirmed in the molten salt by absorption spectroscopy. The result of XRD for the solidified sample containing Ti 3+ and O 2− implies that O 2− reacts with Ti 3+ and Cl − to form TiOCl(s). The concentration quotient of the equilibrium between titanium ions (Ti 2+, Ti 3+) and metallic Ti, K c, was revaluated at 740 °C as follows: 3 T i 2 + ⇄ 2 T i 3 + + Ti , K c = 8.0 × 10 − 2  mol L − 1 = 1.2 × 10 − 1   mol   k g − 1 . In addition, the solubility product of TiOCl(s) in NaCl–KCl equimolar molten salt, K sp, at 700 °C was determined using the results of absorption spectra, K sp = 1.2 × 10 − 2  mol 2  L − 2 = 5.1 × 10 − 3  mol 2   k g − 2 .

There are no comments yet on this publication. Be the first to share your thoughts.