TY - JOUR
T1 - Selective oxidation of hydrogen sulfide to elemental sulfur with Fe/MgO catalysts in a slurry reactor
AU - Lee, Eun Ku
AU - Jung, Kwang Deog
AU - Joo, Oh Shim
AU - Shul, Yong Gun
PY - 2005/2/20
Y1 - 2005/2/20
N2 - 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 α-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+).
AB - 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 α-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+).
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U2 - 10.5012/bkcs.2005.26.2.281
DO - 10.5012/bkcs.2005.26.2.281
M3 - Article
AN - SCOPUS:14844318515
SN - 0253-2964
VL - 26
SP - 281
EP - 284
JO - Bulletin of the Korean Chemical Society
JF - Bulletin of the Korean Chemical Society
IS - 2
ER -