Adsorption of hydrogen sulfide (H2S) on zeolite (Z): Retention mechanism

Sigot, Léa; Ducom, Gäelle; Germain, Patrick

doi:10.1016/j.cej.2015.11.010

Cited by 99 publications

(52 citation statements)

References 28 publications

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“…The reaction mechanism in dry atmosphere with zeolite has recently been investigated [12], but still remains unclear with activated carbons. Thus, an improvement of the sulfur products identification is needed to better understand the complex reactive-adsorption mechanism involved without humidity.…”

Section: Introductionmentioning

confidence: 99%

“…Several adsorbents have been studied for gas desulfurization, such as zeolites [12], activated carbon [13], and metal oxides (zinc, cobalt, iron) dispersed on various supports: mesoporous silica [14][15][16], graphite oxides [17][18][19], hydroxyapatite [20], and functionalized activated carbon [21,22]. Most of the studies dealing with gas desulfurization at room temperature using activated carbon were focused on H 2 S removal from moist air.…”

Section: Introductionmentioning

confidence: 99%

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H2S removal from syngas using wastes pyrolysis chars

Hervy

Minh

Gérente

et al. 2018

Chemical Engineering Journal

104

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A B S T R A C TPyrolysis chars from wastes were investigated as sorbents for H 2 S removal from syngas. The H 2 S removal tests were performed at ambient temperature in various dry gas matrices (N 2 , Air, Syngas) to study the effect of the gas composition on the adsorption efficiency. Two chars were produced by the pyrolysis of: used wood pallets (UWP), and a 50/50% mixture of food waste (FW) and coagulation-flocculation sludge (CFS). The chars were functionalized by low-cost processes without chemicals: gas phase oxygenation and steam activation. Activated chars were the most efficient materials due to their large specific surface area, alkaline pH, basic O-containing groups and structural defects in graphene-like sheets. Raman analysis evidenced that inherent mineral species (especially Ca and Fe) increased the H 2 S removal efficiency by promoting the formation of metal sulfide and metal sulphate species at the char surface. Mesopores lower than 70 Å were revealed to be important adsorption sites. Under dry Syngas matrix, the chars remained efficient and selective toward H 2 S removal despite the presence of CO 2 , while O 2 in the Air matrix decreased their removal capacity due to the formation of sulfur acid species. The most efficient material was the steam activated char from FW/CFS, with a removal capacity of 65 mg H2S .g −1 under dry syngas. This char was proved to be completely regenerated with a thermal treatment under N 2 at 750°C. This study demonstrated that activated chars from food waste and sludge could be used as eco-friendly, affordable, and selective materials for syngas desulfurization even under dry atmosphere.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

H2S removal from syngas using wastes pyrolysis chars

Hervy

Minh

Gérente

et al. 2018

Chemical Engineering Journal

104

View full text Add to dashboard Cite

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“…H2S can be converted to sulphur oxide (SO2) and sulfuric acid (H2SO4). In addition, the removal of sulphate acid can also be through the detailed mechanism of adsorption by zeolite discussed by Sigot et al (2016) [2]. The mechanism is as follows:…”

Section: Hydrogen Sulphidementioning

confidence: 99%

“…The success of various technologies and H2S removal methods has been proven by several research [1,2,37]. However, the method or technique that is often used and successfully applied is by the use of activated carbon through the mechanism of adsorption [40][41][42].…”

Section: Polymer Formationmentioning

confidence: 99%

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Potential Use of Banana Plant (Musa spp.) as Bio-sorbent Materials for Controlling Gaseous Pollutants

2019

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The use of organic waste as bio-sorbent has been carried out by many researchers in the world. Furthermore, the utilization of plants for treating wastewater is also commonly found in various environmental applications. Nevertheless, a review of the ability of banana plants (Musa spp.) as bio-sorbent to eliminate gaseous pollutants is rarely found and has not been fully understood. In this paper, lignocellulosic biomass from banana plants (bark, stem, leaves, peels, etc) was identified and reviewed. Sorption potential was discussed and taken from various literature which then evaluated to discuss the potential and ability of banana plants as sorbent material for treating gaseous pollutants. Assessment and measurement methods were also discussed to obtain the best sorbent in removing gaseous pollutants. This research was conducted by reviewing scientific articles that discussed the use of lignocellulosic materials derived from banana plants for absorbing various gases. Almost all articles described the manufacture of adsorbents from banana plants that were used to treat wastewater but not many researchers have tried to develop a commercially adsorbent for gas-shaped pollutants. This research is expected to provide essential information for the readers to develop advanced materials used to control environmental pollution especially gaseous pollutants.

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