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.
|Number of pages||7|
|Journal||Industrial and Engineering Chemistry Research|
|Publication status||Published - Apr 18 2001|
ASJC Scopus subject areas
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering