Liquid-phase oxidation of hydrogen sulfide to sulfur over CuO/MgO catalyst

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

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The effect of CuO loading on CuO/MgO catalysts was investigated for liquid-phase oxidation of H2S to sulfur. CuO/MgO catalysts were prepared by impregnating MgO with aqueous copper nitrate solution. All of the catalysts were characterized by BET surface analyzer, X-ray diffraction (XRD), and temperature-programmed reduction (TPR). It was observed that the H 2S removal capacity with respect to CuO loading increased up to 4 wt.%, and then decreased with further increase in CuO loading. CuO addition up to 4 wt.% increased the BET surface areas, but beyond that it was decreased. The XRD showed that well dispersed CuO particles could be present on CuO/MgO at less than 4 wt % CuO loading. The crystallites of bulk CuO became evident on CuO/MgO with more than 6 wt.% CuO loading, which were confirmed by a XRD. TPR experiments showed that CuO/MgO catalysts with CuO loading above 6 wt.% consisted of two phases of a well-dispersed and crystalline CuO. It was suggested that Cu2+in the well-dispersed copper oxide domain could be the active species in the wet oxidation of H2S.

Original languageEnglish
Pages (from-to)115-120
Number of pages6
JournalReaction Kinetics and Catalysis Letters
Volume87
Issue number1
DOIs
Publication statusPublished - 2005 Dec 1

Fingerprint

Hydrogen Sulfide
hydrogen sulfide
Hydrogen sulfide
Sulfur
liquid phases
sulfur
catalysts
Oxidation
oxidation
Catalysts
Liquids
X ray diffraction
diffraction
impregnating
x rays
Copper oxides
copper oxides
Crystallites
Nitrates
crystallites

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Physical and Theoretical Chemistry

Cite this

Lee, Eun Ku ; Jung, Kwang Deog ; Joo, Oh Shim ; Shul, Yong-Gun. / Liquid-phase oxidation of hydrogen sulfide to sulfur over CuO/MgO catalyst. In: Reaction Kinetics and Catalysis Letters. 2005 ; Vol. 87, No. 1. pp. 115-120.
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Liquid-phase oxidation of hydrogen sulfide to sulfur over CuO/MgO catalyst. / Lee, Eun Ku; Jung, Kwang Deog; Joo, Oh Shim; Shul, Yong-Gun.

In: Reaction Kinetics and Catalysis Letters, Vol. 87, No. 1, 01.12.2005, p. 115-120.

Research output: Contribution to journalArticle

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AB - The effect of CuO loading on CuO/MgO catalysts was investigated for liquid-phase oxidation of H2S to sulfur. CuO/MgO catalysts were prepared by impregnating MgO with aqueous copper nitrate solution. All of the catalysts were characterized by BET surface analyzer, X-ray diffraction (XRD), and temperature-programmed reduction (TPR). It was observed that the H 2S removal capacity with respect to CuO loading increased up to 4 wt.%, and then decreased with further increase in CuO loading. CuO addition up to 4 wt.% increased the BET surface areas, but beyond that it was decreased. The XRD showed that well dispersed CuO particles could be present on CuO/MgO at less than 4 wt % CuO loading. The crystallites of bulk CuO became evident on CuO/MgO with more than 6 wt.% CuO loading, which were confirmed by a XRD. TPR experiments showed that CuO/MgO catalysts with CuO loading above 6 wt.% consisted of two phases of a well-dispersed and crystalline CuO. It was suggested that Cu2+in the well-dispersed copper oxide domain could be the active species in the wet oxidation of H2S.

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