Catalytic activity of Mo/MgO catalyst in the wet oxidation of H2S to sulfur at room temperature

LEE, E

doi:10.1016/j.apcata.2004.03.033

Cited by 9 publications

(3 citation statements)

References 20 publications

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“…The high-temperature reduction peak can be ascribed to the second step in the reduction of octahedral Mo species of different degrees of agglomeration (Mo ?IV ? 4e -= Mo 0 ) and also to the first step in the reduction of isolated tetrahedral Mo (Lee et al 2004). In the case of the V-MgO support, the first peak was broadened and the second peak disappeared.…”

Section: Tpr Resultsmentioning

confidence: 99%

Comparison of Mo/MgO and Mo/γ-Al2O3 catalysts: impact of support on the structure and dibenzothiophene hydrodesulfurization reaction pathways

Heidarinasab

Soltanieh

Ardjmand

et al. 2016

Int. J. Environ. Sci. Technol.

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The MgO and P 2 O 5 -promoted c-Al 2 O 3 supports with alkaline and acidic natures, respectively, were prepared, impregnated with Mo atoms, and compared for dibenzothiophene (DBT) hydrodesulfurization (HDS) reaction. Ultraviolet spectroscopy and the principal component analysis were used to identify the impact of the supports on the reaction pathways. The catalysts were characterized by BET surface analysis, X-ray diffraction, temperature-programmed reduction, Fourier transform infrared, and X-ray photoelectron spectroscopy. The cAl 2 O 3 -supported catalyst favors the hydrogenation pathway relative to the MgO-supported catalyst, which facilitates the direct desulfurization route. The different performance was attributed to the dissimilar Mo phases that emerged during the activation procedure. The activation under sulfo-reductive condition changed the Mo atoms on c-Al 2 O 3 support into the sulfide phase while extra oxidation took place for the MgO-supported catalyst. The migration and consumption of loosely bonded bulk oxygen atoms with under-coordinated Mo atoms on the MgO support were introduced as a possible reason for such extra oxidation. DFT calculations predicted an interaction between the Mo/MgO catalyst and DBT via the electron donation from the catalyst oxygen atoms to the aromatic rings, resulting in weakening and breaking of the C-S bonds. In spite of the higher resistance of the MgO-supported catalyst toward coking and its superior activity, its lower hydrogenation capability suggested using a dualfunction catalyst. Accordingly, two catalysts were mixed and the synergism was observed in the HDS reaction of thiophene.

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Section: Tpr Resultsmentioning

confidence: 99%

Comparison of Mo/MgO and Mo/γ-Al2O3 catalysts: impact of support on the structure and dibenzothiophene hydrodesulfurization reaction pathways

Heidarinasab

Soltanieh

Ardjmand

et al. 2016

Int. J. Environ. Sci. Technol.

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show abstract

“…It was found that MgO with rich basic sites is suitable for H 2 S oxidation. 88,89 Recently, Zhang et al reported the application of MgO-supported mesoporous carbon spheres (MCS-MgO) for the catalytic oxidation of H 2 S. 90 In the MCS-MgO catalyst, the inhibition of acid−base neutralization reaction (OH − + H + → H 2 O) leads to the stable release of OH − , which ensures stable H 2 S oxidation activity. A series of ZnO-MgO supported on activated carbon catalysts were investigated by Yang et al, which showed a satisfactory H 2 S conversion under both dry and wet conditions.…”

Section: Selective Oxidation Of H 2 Smentioning

confidence: 99%

“…The pH value of MgO materials plays a crucial role in the desulfurization reaction. It was found that MgO with rich basic sites is suitable for H 2 S oxidation. , Recently, Zhang et al reported the application of MgO-supported mesoporous carbon spheres (MCS-MgO) for the catalytic oxidation of H 2 S . In the MCS-MgO catalyst, the inhibition of acid–base neutralization reaction (OH – + H + → H 2 O) leads to the stable release of OH – , which ensures stable H 2 S oxidation activity.…”

Section: Selective Oxidation Of H2smentioning

confidence: 99%

Advances in Resources Recovery of H₂S: A Review of Desulfurization Processes and Catalysts

Zheng,

Lei,

Wang

et al. 2023

ACS Catal.

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Hydrogen sulfide (H 2 S) is a notorious and lethal gas widely generated in human economic activities and natural occurrences. The growing demand for pollution control makes it vital for the development of efficient processes to remove and convert H 2 S into high-valued products. As such, diversified technologies have been extensively explored, including H 2 S splitting, selective oxidation of H 2 S, and simultaneous conversion of H 2 S and CO 2 . In this review, the state-of-the-art processes for H 2 S conversion and utilization are reviewed. The potentials of various value-added products from H 2 S utilization, such as H 2 , syngas, COS, CH 3 SH, and other sulfur-containing fine chemicals are elucidated in detail. Notably, the traditional and emerging materials for H 2 S removal, mainly including metal oxide catalysts and carbon-based materials are also overviewed in this review. In addition, the catalytic mechanisms for these desulfurization reactions are also briefly discussed. Lastly, perspectives are given on the viability and technological gaps for each technology and corresponding catalysts.

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Impact of support on the catalytic behavior of Mo/γ-Al2O3 and Mo/MgO catalysts on the desulfurization reaction

Soltanieh

Heidarinasab

Ardjmand

et al. 2016

Applied Catalysis A: General

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Catalytic activity of Mo/MgO catalyst in the wet oxidation of H2S to sulfur at room temperature

Cited by 9 publications

References 20 publications

Comparison of Mo/MgO and Mo/γ-Al2O3 catalysts: impact of support on the structure and dibenzothiophene hydrodesulfurization reaction pathways

Comparison of Mo/MgO and Mo/γ-Al2O3 catalysts: impact of support on the structure and dibenzothiophene hydrodesulfurization reaction pathways

Advances in Resources Recovery of H₂S: A Review of Desulfurization Processes and Catalysts

Impact of support on the catalytic behavior of Mo/γ-Al2O3 and Mo/MgO catalysts on the desulfurization reaction

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Catalytic activity of Mo/MgO catalyst in the wet oxidation of H2S to sulfur at room temperature

Cited by 9 publications

References 20 publications

Comparison of Mo/MgO and Mo/γ-Al2O3 catalysts: impact of support on the structure and dibenzothiophene hydrodesulfurization reaction pathways

Comparison of Mo/MgO and Mo/γ-Al2O3 catalysts: impact of support on the structure and dibenzothiophene hydrodesulfurization reaction pathways

Advances in Resources Recovery of H2S: A Review of Desulfurization Processes and Catalysts

Impact of support on the catalytic behavior of Mo/γ-Al2O3 and Mo/MgO catalysts on the desulfurization reaction

Contact Info

Product

Resources

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Advances in Resources Recovery of H₂S: A Review of Desulfurization Processes and Catalysts