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

M. Hatori; E. Sasaoka; A. Uddin

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

M. Hatori, E. Sasaoka, A. Uddin

Institute for Global Human Resource Development

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	1884-1890
Number of pages	7
Journal	Industrial and Engineering Chemistry Research
Volume	40
Issue number	8
Publication status	Published - Apr 18 2001

ASJC Scopus subject areas

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

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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.",

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AU - Sasaoka, E.

AU - Uddin, A.

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N2 - 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.

AB - 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.

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

Abstract

ASJC Scopus subject areas

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