Role of TiO2 on oxidative regeneration of spent high-temperature desulfurization sorbent ZnO-TiO2

M. Hatori, E. Sasaoka, A. Uddin

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20 Citations (Scopus)

Abstract

To develop an easily regenerable high-temperature desulfurization sorbent, the role of TiO2 in the course of oxidative regeneration of ZnO-TiO2 in the presence of O2 and H2O was studied. ZnO-TiO2 and ZnO were prepared by a precipitation method using aqueous solutions of Zn-(NO3)2, Ti(SO4)2, TiO2 sol, and NH3. The oxidative regeneration character of the spent ZnO-TiO2 and ZnO was examined using a temperature-programmed reaction technique and isotopic H218O. It was found that TiO2 accelerated both the reaction between ZnS and O2 and the reaction between ZnS and H2O and also accelerated the oxidative regeneration of ZnS in the presence of both O2 and H2O. Furthermore, the acceleration in the presence of both O2 and H2O could be explained by an activation of H2O over TiO2 and spillover of the activated H2O species.

Original languageEnglish
Pages (from-to)1884-1890
Number of pages7
JournalIndustrial and Engineering Chemistry Research
Volume40
Issue number8
Publication statusPublished - Apr 18 2001

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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