Influence of iron precursors on catalytic wet oxidation of H2S to sulfur over Fe/MgO catalysts

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

doi:10.1016/j.molcata.2005.05.034

Cited by 12 publications

(6 citation statements)

References 14 publications

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“…Then, some of the reducing power of S 2À was consumed for reducing Fe 3þ and resulted in the inhibition of the production of hydrogen from water using S 2À as the reductant. Some researchers have reported that Fe 3þ can be reduced by S 2À during the catalytic wet oxidation of H 2 S because Fe 3þ has the potential for decomposition of H 2 S and it can be regenerated using S 2À as a reductant [30,31]. Therefore, the formation of Fe 3þ or Fe 2þ was the reason for the remarkable decrease in hydrogen production in the presence of Fe.…”

mentioning

confidence: 99%

Effects of general zero-valent metals power of Co/W/Ni/Fe on hydrogen production with H 2 S as a reductant under hydrothermal conditions

Zhang

Jin

et al. 2011

International Journal of Hydrogen Energy

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confidence: 99%

Effects of general zero-valent metals power of Co/W/Ni/Fe on hydrogen production with H 2 S as a reductant under hydrothermal conditions

Zhang

Jin

et al. 2011

International Journal of Hydrogen Energy

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“…Considering these premises, several authors have evaluated different Fe--based catalytic system, such as Fe2O3/SiO2 [22,24], Fe2O3/Al2O3 [25,26], Fe2O3/MgO [27], Fe2O3/CeO2 [28], Fe2O3/TiO2 [29], Fe2O3/Al-PILC [30], Fe2O3/SiC [31][32][33], ironantimonate (FeSbO4) catalysts [34], iron-molybdate (Fe2(MoO4)3) catalysts [35] in the partial oxidation of H2S to elemental sulfur.…”

Section: Introductionmentioning

confidence: 99%

Fe2O3 supported on hollow micro/mesospheres silica for the catalytic partial oxidation of H2S to sulfur

Cecilia

Soriano

Correia

et al. 2020

Microporous and Mesoporous Materials

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A family of Fe-based catalysts supported on hollow silica mesospheres have been synthesized and tested in the catalytic partial oxidation of H2S to elemental sulfur at 170-180ºC, atmospheric pressure and under 300 minutes of time-on-stream. The characterization of the synthesized catalysts by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), diffuse reflectance UV-vis spectra (DRS), H2-termoprogrammed reduction (H2-TPR), N2 adsorptiondesorption at -196 ºC and X-ray photoelectron spectroscopy (XPS) reveals the formation of a catalytic system with high micro-and mesoporosity and high dispersion of the Fe2O3 species. The catalytic results reported a high activity in the partial oxidation of H2S, reaching over the HMS-10Fe (i.e. with 10 wt% of iron loading) catalyst at 180 ° C and after 300 minutes of time in the stream (TOS), a higher conversion value close to 94% with a selectivity towards elemental sulfur of 98%. The comparison of HMS-10Fe catalysts with other SiO2-based supports, as a fumed silica (Cab-osil; Cab) or a mesoporous silica (SBA-15), indicates changes in the catalytic activity for H2S conversion depending on support, and showing the following trend: HMS-10Fe > SBA-10Fe > Cab-10Fe. These results suggest that the use of a support with a narrow pore tend to achieve facilitate the iron dispersion favoring higher conversion rates.

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“…in the form of acid rain [2]. Many processes are available for H 2 S removal from a gas stream, such as alkaline/amine scrubbing, chemical oxidation, adsorption, bio-filtration, and catalytic wet oxidation [3][4][5]. The absorption process is a process that is based on surface of the adsorbent, which makes separation of the mixture.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Hydrogen Sulfide, Carbondioxide and Methane by Zeolite (Ferrierite; H-FER): Computational Chemistry Method

Suthanyawatchai

Onthong

2011

AMR

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The adsorption of hydrogen sulfide (H2S), carbondioxide (CO2) and methane (CH4) on H-FER zeolite was investigated under computational chemistry using ONIOM (HF/6-31G (d,p):UFF) and ONIOM (B3LYP/6-31G (d,p):UFF) method. Compared to the H-FER zeolite induces much stronger binding of H2S, CO2 and CH4 suggesting great enhancements in the adsorption selectivity. The order of binding energies of adsorbed molecules is H2S > CO2 > CH4. It was found that the extended zeolitic framework covering the nanocavity was essential for describing the confinement effect of the zeolite. The results of these calculations show that the zeolite can be used to adsorb H2S bester then CO2 and CH4. Carbondioxide and hydrogen sulfide are pollutant in biogas product from anaerobic digestion of biodegradable materials. There for, zeolite can be use to purified gas before using as fuel.

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Influence of iron precursors on catalytic wet oxidation of H2S to sulfur over Fe/MgO catalysts

Cited by 12 publications

References 14 publications

Effects of general zero-valent metals power of Co/W/Ni/Fe on hydrogen production with H 2 S as a reductant under hydrothermal conditions

Effects of general zero-valent metals power of Co/W/Ni/Fe on hydrogen production with H 2 S as a reductant under hydrothermal conditions

Fe2O3 supported on hollow micro/mesospheres silica for the catalytic partial oxidation of H2S to sulfur

Adsorption of Hydrogen Sulfide, Carbondioxide and Methane by Zeolite (Ferrierite; H-FER): Computational Chemistry Method

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