High temperature hydrogen sulfide and carbonyl sulfide removal with manganese oxide (MnO) and iron oxide (FeO) on .gamma.-alumina acceptors

Wakker, J.P.; Gerritsen, Albert W.; Moulijn, Jacob A.

doi:10.1021/ie00013a019

Cited by 86 publications

(26 citation statements)

References 17 publications

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“…Results presented for the Mn15-Al2O3-R sample show Mn3O4 and MnAl2O4 phases which is in an agreement with others [21,22]. The chemistry beyond the spinels formation was discussed in detail previously [11].…”

Section: X-ray Diffraction (Xrd)supporting

confidence: 88%

“…This is a typical behavior observed also by others [22]. It is therefore unlikely that the treatment in H2…”

Section: Mno-support + H2s ↔ Mns-support + H2osupporting

confidence: 83%

“…As shown in Fig. 2, the sorption characteristic are quite alike for the Mn15-Al2O3 and Mn15-ZrO2 samples, both showing a typical sorption behavior observed previously for the alumina supported manganese oxides under similar conditions [11,21,22]. The sorption characteristics are also similar for the Mn15-CeO2 and Mn15-TiO2 samples, however the measured H2S concentration profiles depart from the standard behavior as a considerable "pre-breakthrough" concentration is observed.…”

Section: H2s Sorption On Supported Manganese Oxide Sorbentssupporting

confidence: 74%

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Performance of Mn-based H2S sorbents in dry, reducing atmosphere – Manganese oxide support effects

Chytil

Kure

Lødeng

et al. 2017

Fuel

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Abstract:High temperature H2S sorbents comprising manganese oxide (15 wt. %) supported on TiO2, ZrO2, CeO2 and Al2O3 were prepared by wet impregnation using Mn(NO3)2.4H2O as Mn precursor. Upon activation in H2, the sorbent performance testing was conducted at 650 °C in a model gas mixture with a composition of 0.4 vol. % of H2S in 40 vol. % of H2, the balance being inert gas (N2 and Ar).Sorbent regeneration was performed at 650 °C with 5.2 vol. % of O2 in N2. The initial sorption performance is first reported for the parent (Mn-free) supports showing a considerable H2S sorption on ZrO2 and CeO2 and a minor sorption on Al2O3 and TiO2. The Mn sorbents were subject to 13 sorption/regeneration cycles. The highest initial sorption capacity is reported for cerium supported Mn oxide, which is also the sample that deactivates most. A prolonged exposure to H2 at 650 °C results in a reversible loss of the sorption capacity that was observed for all the samples except for Mn on zirconia suggesting its superior stability in H2.

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Section: X-ray Diffraction (Xrd)supporting

confidence: 88%

“…This is a typical behavior observed also by others [22]. It is therefore unlikely that the treatment in H2…”

Section: Mno-support + H2s ↔ Mns-support + H2osupporting

confidence: 83%

Section: H2s Sorption On Supported Manganese Oxide Sorbentssupporting

confidence: 74%

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Performance of Mn-based H2S sorbents in dry, reducing atmosphere – Manganese oxide support effects

Chytil

Kure

Lødeng

et al. 2017

Fuel

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“…It is known that H 2 S can react with CO or CO 2 to form COS through the following two reactions [6][7][8]:…”

Section: Resultsmentioning

confidence: 99%

H2S removal with ZnO during fuel processing for PEM fuel cell applications

King

2006

Catalysis Today

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“…[7][8][9] However, the reduction of ZnO and subsequent vaporization of elemental Zn remain a severe problem when the temperature is increased to 650 C. 10,11 More recently, Mn oxides and Mn-based oxides have attracted considerable attention for high temperature desulfurization. [12][13][14] The reactivity of Mn-based oxides is higher than that of ZnO, and Mn-based oxides cannot be easily reduced to elemental Mn during hot coal gas desulfurization. To overcome the vaporization of Zn, a series of metals were added with Zn to form alloy sorbents oxides for H 2 S removal from hot coal gas.…”

Section: Introductionmentioning

confidence: 99%

Performance of ZnMn₂O₄/SiO₂ sorbent for high temperature H₂S removal from hot coal gas

Wang

Chang

et al. 2017

RSC Adv.

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A spinel ZnMn 2 O 4 sorbent supported on SiO 2 was fabricated using a wetness impregnation method for high temperature desulfurization. The operating parameters including operating temperature, ZnMn 2 O 4 content, space velocity, gas composition, and multiple desulfurization/regeneration cycles were evaluated to understand the optimal condition. The ZnMn 2 O 4 /SiO 2 sorbent exhibits better desulfurization performance when operating temperature is controlled above 600 C and the suitable space velocity is between 5000-15 000 h À1. desulfurization. Through the EDS and TPR analyses, the residual sulfur was found in the regenerated sorbent and this sulfur species is sulfate from incomplete regeneration. A regeneration temperature of 700 C was the best choice to overcome the formation of metal sulfate.

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High temperature hydrogen sulfide and carbonyl sulfide removal with manganese oxide (MnO) and iron oxide (FeO) on .gamma.-alumina acceptors

Cited by 86 publications

References 17 publications

Performance of Mn-based H2S sorbents in dry, reducing atmosphere – Manganese oxide support effects

Performance of Mn-based H2S sorbents in dry, reducing atmosphere – Manganese oxide support effects

H2S removal with ZnO during fuel processing for PEM fuel cell applications

Performance of ZnMn₂O₄/SiO₂ sorbent for high temperature H₂S removal from hot coal gas

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High temperature hydrogen sulfide and carbonyl sulfide removal with manganese oxide (MnO) and iron oxide (FeO) on .gamma.-alumina acceptors

Cited by 86 publications

References 17 publications

Performance of Mn-based H2S sorbents in dry, reducing atmosphere – Manganese oxide support effects

Performance of Mn-based H2S sorbents in dry, reducing atmosphere – Manganese oxide support effects

H2S removal with ZnO during fuel processing for PEM fuel cell applications

Performance of ZnMn2O4/SiO2 sorbent for high temperature H2S removal from hot coal gas

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Product

Resources

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Performance of ZnMn₂O₄/SiO₂ sorbent for high temperature H₂S removal from hot coal gas