The effect of ferric oxide on the removal of hydrogen sulfide over ZnO-Fez03 mixed metal oxide sorbents and on the oxidative regeneration of sulfided sorbents was investigated. When ferric oxide was added to the zinc oxide, the reduction of ZnO was retarded by interaction of ZnO with ZnFe204. This interaction was confirmed by larger binding energies of Zn 2~312 and Zn 2~112, identified by ESCA, of the ZnO-ZnFe204 sorbent than those of ZnO. Zinc ferrite with a spinel structure yielded not only high H2S removal capacity but also much SO2 generation. A linear increase of SO2 generation was confirmed up t o 50 wt % Fe203. Resulting from the thermal decomposition of H2S over metal sulfides, H2 generation increased with respect to Fez03 according to a quadratic equation. Channeling, caused by sintering during sulfidation, made the flow path of the reactant change and thus pure ZnO sorbent and the sorbent containing 3 wt % Fez0 did not sulfurate completely. Addition of Fez03 prevented surface structural change like sintering of ZnO during sulfidation.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.