Support effects in catalytic wet oxidation of H2S to sulfur on supported iron oxide catalysts

Eun Ku Lee, Kwang Deog Jung, Oh Shim Joo, Yong-Gun Shul

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

Iron oxide catalysts supported on MgO, Al2O3, SiO2 and ZrO2 were prepared by an impregnation method. They were characterized by BET surface analysis, X-ray diffraction (XRD), temperature-programmed reduction (TPR) and Mössbauer spectroscopy. Fe/MgO catalyst shows the highest H2S removal capacity in wet oxidation at room temperature. Both the XRD and the TPR analyses of the catalysts indicate that H2S removal capacity correlates with the dispersion of iron oxide on supports. Mössbauer spectroscopy shows that four kinds of Fe3+ species are present in the supported iron oxide catalysts: Two highly dispersed species, Fe3+ oxide clusters, and α-Fe2O3 particles. Two highly dispersed species, Fe3+ cation and MgFe2O4, are present in Fe/MgO. Fe3+ oxide clusters and α-Fe2O3 crystals are evident in both Fe/SiO2 and Fe/ZrO2. α-Fe2O3 crystals are only observed in Fe/Al2O3.

Original languageEnglish
Pages (from-to)1-4
Number of pages4
JournalApplied Catalysis A: General
Volume284
Issue number1-2
DOIs
Publication statusPublished - 2005 Apr 28

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Iron oxides
Sulfur
Oxidation
Oxides
Catalysts
Spectroscopy
X ray diffraction
Crystals
Surface analysis
Catalyst supports
Impregnation
Temperature
Cations
Positive ions
ferric oxide

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Process Chemistry and Technology

Cite this

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title = "Support effects in catalytic wet oxidation of H2S to sulfur on supported iron oxide catalysts",
abstract = "Iron oxide catalysts supported on MgO, Al2O3, SiO2 and ZrO2 were prepared by an impregnation method. They were characterized by BET surface analysis, X-ray diffraction (XRD), temperature-programmed reduction (TPR) and M{\"o}ssbauer spectroscopy. Fe/MgO catalyst shows the highest H2S removal capacity in wet oxidation at room temperature. Both the XRD and the TPR analyses of the catalysts indicate that H2S removal capacity correlates with the dispersion of iron oxide on supports. M{\"o}ssbauer spectroscopy shows that four kinds of Fe3+ species are present in the supported iron oxide catalysts: Two highly dispersed species, Fe3+ oxide clusters, and α-Fe2O3 particles. Two highly dispersed species, Fe3+ cation and MgFe2O4, are present in Fe/MgO. Fe3+ oxide clusters and α-Fe2O3 crystals are evident in both Fe/SiO2 and Fe/ZrO2. α-Fe2O3 crystals are only observed in Fe/Al2O3.",
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Support effects in catalytic wet oxidation of H2S to sulfur on supported iron oxide catalysts. / Lee, Eun Ku; Jung, Kwang Deog; Joo, Oh Shim; Shul, Yong-Gun.

In: Applied Catalysis A: General, Vol. 284, No. 1-2, 28.04.2005, p. 1-4.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Jung, Kwang Deog

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AU - Shul, Yong-Gun

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N2 - Iron oxide catalysts supported on MgO, Al2O3, SiO2 and ZrO2 were prepared by an impregnation method. They were characterized by BET surface analysis, X-ray diffraction (XRD), temperature-programmed reduction (TPR) and Mössbauer spectroscopy. Fe/MgO catalyst shows the highest H2S removal capacity in wet oxidation at room temperature. Both the XRD and the TPR analyses of the catalysts indicate that H2S removal capacity correlates with the dispersion of iron oxide on supports. Mössbauer spectroscopy shows that four kinds of Fe3+ species are present in the supported iron oxide catalysts: Two highly dispersed species, Fe3+ oxide clusters, and α-Fe2O3 particles. Two highly dispersed species, Fe3+ cation and MgFe2O4, are present in Fe/MgO. Fe3+ oxide clusters and α-Fe2O3 crystals are evident in both Fe/SiO2 and Fe/ZrO2. α-Fe2O3 crystals are only observed in Fe/Al2O3.

AB - Iron oxide catalysts supported on MgO, Al2O3, SiO2 and ZrO2 were prepared by an impregnation method. They were characterized by BET surface analysis, X-ray diffraction (XRD), temperature-programmed reduction (TPR) and Mössbauer spectroscopy. Fe/MgO catalyst shows the highest H2S removal capacity in wet oxidation at room temperature. Both the XRD and the TPR analyses of the catalysts indicate that H2S removal capacity correlates with the dispersion of iron oxide on supports. Mössbauer spectroscopy shows that four kinds of Fe3+ species are present in the supported iron oxide catalysts: Two highly dispersed species, Fe3+ oxide clusters, and α-Fe2O3 particles. Two highly dispersed species, Fe3+ cation and MgFe2O4, are present in Fe/MgO. Fe3+ oxide clusters and α-Fe2O3 crystals are evident in both Fe/SiO2 and Fe/ZrO2. α-Fe2O3 crystals are only observed in Fe/Al2O3.

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