Studies of supported oxide catalysts in the direct selective oxidation of hydrogen sulfide

Batygina, M. V.; Dobrynkin, N. M.; Кириченко, О. А.; Khairulin, S. R.; Ismagilov, Z. R.

doi:10.1007/bf02070067

Cited by 17 publications

(10 citation statements)

References 4 publications

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“…Many aluminas are used as a catalyst support for the selective oxidation of hydrogen sulfide [18,34,35]. Thus, it is interesting to note that alumina also contributes to the activity and selectivity of the overlying catalyst.…”

Section: Correlation Between Surface Acid Properties and Catalytic Bementioning

confidence: 99%

“…In the catalytic reactions of hydrogen sulfide oxidation [12,18,20] and decomposition [65], adsorption of H2S on the catalyst surface is thought to be necessary for H2S activation and its transformation to sulfide or sulfite/sulfate complexes [62,66]. Although H2S adsorption on -Al2O3 has been studied in detail [62,[66][67][68], there are debates concerning the nature of the sites involved in H2S adsorption.…”

Section: Study Of Hydrogen Sulfide Adsorptionmentioning

confidence: 99%

“…The reaction takes place at a comparatively low temperature of 220280 °C [11]. Although activated carbon [12][13][14] and zeolites [15] are commonly employed as catalysts for H2S oxidation, individual oxides of transition metals (e.g., Fe2O3, CuO, MnOx, CrOx, and V2O5) or their mixtures are more promising [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. Granulated and monolithic aluminas, which are widely used as a support mate-…”

Section: Introductionmentioning

confidence: 99%

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Effect of χ-alumina addition on H 2 S oxidation properties of pure and modified γ-alumina

Yashnik

Kuznetsov

Ismagilov

2018

Chinese Journal of Catalysis

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Section: Correlation Between Surface Acid Properties and Catalytic Bementioning

confidence: 99%

Section: Study Of Hydrogen Sulfide Adsorptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of χ-alumina addition on H 2 S oxidation properties of pure and modified γ-alumina

Yashnik

Kuznetsov

Ismagilov

2018

Chinese Journal of Catalysis

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“…In this situation, various metal oxides (Fe, Co, Mn, and V), supported on spherical (a, r, r + x) Al 2 O 3 , were prepared and evaluated. 87 The sulfur selectivity of Fe 2 O 3 /r-Al 2 O 3 catalysts is independent on Fe content and is maintained at 99% at 250−300°C under the condition of stoichiometric H 2 S/O 2 mixtures (C H 2 S = 15−20 vol %). In contrast, under the same condition, the H 2 S conversion increases with elevations in Fe content and reaction temperature.…”

Section: Acs Catalysismentioning

confidence: 99%

H₂S-Selective Catalytic Oxidation: Catalysts and Processes

et al. 2015

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ABSTRACT:The most widely used catalysts and processes for H 2 S-selective catalytic oxidation are overviewed in this review. Two kinds of catalysts have been investigated intensively: carbon-based catalysts (active carbon catalyst, carbon nanotube catalyst, and carbon nanofiber catalyst), metal oxide-based catalysts (metal oxide catalyst, oxidesupported catalyst, and clay-supported catalyst). Among them, carbon-based catalysts are utilized mainly in discontinuous processes at relatively low temperatures, whereas metal oxide catalysts are the most widely used in practice. However, the reaction temperature is relatively high. Fortunately, a MgAlVO catalyst derived from LDH materials and intercalated claysupported catalysts exhibit excellent catalytic activities at relatively lower temperatures. According to various studies, the catalytic behaviors mainly obey the Mars−van Krevelen mechanism; however, the catalyst deactivation mechanism differs, depending on the catalyst. In practice, the mobil direct oxidation process (MODOP), super-Claus and Euro-Claus processes were developed for H 2 S-selective catalytic oxidation. Nevertheless, MODOP has to proceed under water-free conditions. The super-Claus process can operate in up to 30% water content. The Euro-Claus process is a modified version of the super-Claus process, which was developed to eliminate recovery losses of escaped SO 2 .

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“…Iron-containing supported systems are promising catalysts for the selective oxidation of hydrogen sulfide. For example, Fe and Fe/Cr catalysts supported on α-alumina or silica are used commercially as catalysts for the SUPERCLAUS  process [5][6][7][8][9]. As a consequence, the iron-containing catalysts have attracted much attention in the past.…”

Section: Introductionmentioning

confidence: 99%

Effect of the calcination temperature on the properties of Fe2O3/SiO2 catalysts for oxidation of hydrogen sulfide

Bukhtiyarova

Делий

Sakaeva³

et al. 2007

React Kinet Catal Lett

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The effect of the calcination temperature on the properties of supported iron oxide catalysts for hydrogen sulfide oxidation prepared by impregnation of silica with iron(III) nitrate has been studied. An increase in the calcination temperature was found to diminish the catalytic activity of the Fe 2 O 3 /SiO 2 catalysts in hydrogen sulfide oxidation. This behavior can be explained by the agglomeration of iron oxide particles and by a decrease in the surface concentration of active sites. It has been shown that an increase in the calcination temperature makes the catalyst more stable towards the sulfidation of the active component (Fe 2 O 3 ) to the iron disulfide phase.

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Studies of supported oxide catalysts in the direct selective oxidation of hydrogen sulfide

Cited by 17 publications

References 4 publications

Effect of χ-alumina addition on H 2 S oxidation properties of pure and modified γ-alumina

Effect of χ-alumina addition on H 2 S oxidation properties of pure and modified γ-alumina

H₂S-Selective Catalytic Oxidation: Catalysts and Processes

Effect of the calcination temperature on the properties of Fe2O3/SiO2 catalysts for oxidation of hydrogen sulfide

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Studies of supported oxide catalysts in the direct selective oxidation of hydrogen sulfide

Cited by 17 publications

References 4 publications

Effect of χ-alumina addition on H 2 S oxidation properties of pure and modified γ-alumina

Effect of χ-alumina addition on H 2 S oxidation properties of pure and modified γ-alumina

H2S-Selective Catalytic Oxidation: Catalysts and Processes

Effect of the calcination temperature on the properties of Fe2O3/SiO2 catalysts for oxidation of hydrogen sulfide

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Product

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H₂S-Selective Catalytic Oxidation: Catalysts and Processes