Selective Oxidation of Hydrogen Sulfide to Elemental Sulfur with Fe/MgO Catalysts in a Slurry Reactor

Bulletin of the Korean chemical society

Oh-Shim Joo¹  Eun-Ku Lee¹  Yong-Gun Shul¹  Kwang-Deog Jung¹ 

关键词: Fe/MgO catalyst;    Wet oxidation;    H2S;    Redox mechanism;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

The Fe/MgO catalysts with different Fe loadings (1, 4, 6, 15 and 30 wt% Fe) were prepared by a wet impregnation with iron nitrate as precursor. All of the catalysts were characterized by BET surface analyzer, X-ray diffraction (XRD), temperature-programmed reduction (TPR), and X-ray photoelectron spectroscopy (XPS). The maximum removal capacity of H2S was obtained with 15 wt% Fe/MgO catalyst which had the highest BET surface area among the measured catalysts. XRD of Fe/MgO catalysts showed that well dispersed Fe particles could be present on Fe/MgO with Fe loadings below 15 wt%. The crystallites of bulk �?-Fe2O3 became evident on 30 wt% Fe/MgO, which were confirmed by XRD. TPR profiles showed that the reducibility of Fe/MgO was strongly related to the loaded amounts of Fe on MgO support. Therefore, the highest removal efficiency of H2S in wet oxidation could be ascribed to a good dispersion and high reducibility of Fe/MgO catalyst. XPS studies indicated that the H2S oxidation with Fe/MgO could proceed via the redox mechanism (Fe3+ �? Fe2+).

【 授权许可】

Unknown