Thermodynamic modeling and experimental verification for ion-exchange synthesis of K2O·6TiO2 and TiO2 fibers from K2O·4TiO2

Ningzhong Bao, Xiaohua Lu, Xiaoyan Ji, Xin Feng, Jingwei Xie

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

A thermodynamic model was established to determine ion-exchange conditions for the synthesis of potassium hexatitanate (K2O·6TiO2) and titanium dioxide (TiO2) from potassium tetratitanate (K2O·4TiO2) fiber. In the proposed model equilibrium species in the solid phase and corresponding ion-exchange equilibrium constants at 298.15K were determined from the experimental data of Sasaki et al. [Inorg. Chem. 24 (1985) 2265]. In order to verify the proposed model, prediction results were compared with experimental data determined in literature and those measured in this work. The comparison shows a good agreement. Based on this, the proposed model was also used to predict more extensive suitable conditions for the synthesis of K2O·6TiO2 and TiO2.

Original languageEnglish (US)
Pages (from-to)229-243
Number of pages15
JournalFluid Phase Equilibria
Volume193
Issue number1-2
DOIs
StatePublished - Jan 30 2002

Keywords

  • Fiber
  • Ion-exchange
  • Model
  • Potassium titanate
  • Solid-fluid (potassium titania fiber-aqueous solution) equilibria
  • Titanium dioxide

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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