A review of sorbents for high-temperature hydrogen sulfide removal from hot coal gas

Liu, Dongjing; Wang, Qian; Wu, Jihuai; Liu, Yangxian

doi:10.1007/s10311-018-0792-x

Cited by 56 publications

(28 citation statements)

References 122 publications

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“…The literature discusses several metal oxides for the removal of H 2 S [27]. However, depending on the operating temperature only a few may turn out to be suitable.…”

Section: Selecting a Suitable Metal Oxidementioning

confidence: 99%

“…Using metal sorbents to remove H 2 S from diluted gas streams is a common practice nowadays [27]. The active compound of the sorbent is a metal oxide that reacts with H 2 S to trap the sulfur in the form of solid metal sulfide according to:…”

Section: Introductionmentioning

confidence: 99%

“…The latter is complemented by a set of mathematical approximations that allow for a quick assessment of process designs and experimental data and their feasibility. There are several review papers on syngas and biogas cleaning that discuss H 2 S removal methods [8,13,19,[29][30][31][32][33][34][35], however, only few discuss the removal by using unsupported metal oxides suitable for high temperature applications [27,36,37]. The presents paper adds an additional dimension to these works by reviewing the metal oxide sorption process from the viewpoint of process design and process modeling.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Removal of Hydrogen Sulfide with Metal Oxides in Packed Bed Reactors—A Review from a Modeling Perspective with Practical Implications

Sadegh-Vaziri

Bäbler

2019

Applied Sciences

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Sulfur, and in particular, H 2 S removal is of significant importance in gas cleaning processes in different applications, including biogas production and biomass gasification. H 2 S removal with metal oxides is one of the most viable alternatives to achieve deep desulfurization. This process is usually conducted in a packed bed configuration in order to provide a high solid surface area in contact with the gas stream per unit of volume. The operating temperature of the process could be as low as room temperature, which is the case in biogas production plants or as high as 900 ∘ C suitable for gasification processes. Depending on the operating temperature and the cleaning requirement, different metal oxides can be used including oxides of Ca, Fe, Cu, Mn and Zn. In this review, the criteria for the design and scale-up of a packed bed units are reviewed and simple relations allowing for quick assessment of process designs and experimental data are presented. Furthermore, modeling methods for the numerical simulation of a packed bed adsorber are discussed.

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“…The literature discusses several metal oxides for the removal of H 2 S [27]. However, depending on the operating temperature only a few may turn out to be suitable.…”

Section: Selecting a Suitable Metal Oxidementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Removal of Hydrogen Sulfide with Metal Oxides in Packed Bed Reactors—A Review from a Modeling Perspective with Practical Implications

Sadegh-Vaziri

Bäbler

2019

Applied Sciences

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“…It can be seen that there is a slight decline in desulfurization capacity after the first cycle. The tiny loss of sulfur capacity can be ascribed to sintering of the sorbent and the active components aggregation, as a large amount of heat is released during the regeneration process [18]. The breakthrough sulfur capacity changes ranging from 10.1 to 11.9 g S/100g.…”

Section: Characterizationsmentioning

confidence: 99%

“…Many kinds of metal oxides, based on the metals Ba, Ca, Co, Cu, Fe, Mn, Sr, W, and Zn, exhibit high potential for desulfurization at high temperature [9][10][11][12][13][14][15][16]. However, some metal oxides are generally degenerated in a reducing gas mixture during HGD process due to thermal instability at high temperature, such as Zn evaporation and Cu-oxides reduction [17,18]. For Mn-based adsorbents, a high concentration of desulfurization equilibrium is a main disadvantage [19].…”

Section: Introductionmentioning

confidence: 99%

Regeneration Mechanism of Sulfur Absorption Via Samarium-doped Cerium Adsorbents in the Gas Atmosphere of O2/N2

Dong

2020

Materials

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Sulfides existing in many high-temperature gas mixtures have a negative effect on various industrial applications. Ce-based adsorbents are becoming a hotspot in the high-temperature desulfurization process owing to their excellent thermal stability at high temperatures and regeneration capacity. In this study, we investigate the regeneration path of samarium-doped cerium (SDC) sorbent at high temperature. The SDC adsorbent showed a good sulfur removal ability and excellent regeneration capacity. Ce2O2S and Ce(SO4)2 are observed in the used adsorbent, and Ce2O2S is the main sulfur-containing species. The regeneration path of the Ce2O2S is the key to the regeneration mechanism of the adsorbent. There are two regeneration paths for the Ce2O2S at high temperature in O2/N2 gas mixture. In air stream, the Ce2O2S is oxidized to Ce2O2SO4 and then decomposes into CeO2 and SO2. In a 2% O2/N2 gas condition, the Ce2O2S directly generates CeO2 and elemental sulfur with O2 assistance.

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The Role of Chemical Looping in Industrial Gas Separation

Shah

Jangam

Joshi

et al. 2022

Sustainable Separation Engineering

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A review of sorbents for high-temperature hydrogen sulfide removal from hot coal gas

Cited by 56 publications

References 122 publications

Removal of Hydrogen Sulfide with Metal Oxides in Packed Bed Reactors—A Review from a Modeling Perspective with Practical Implications

Removal of Hydrogen Sulfide with Metal Oxides in Packed Bed Reactors—A Review from a Modeling Perspective with Practical Implications

Regeneration Mechanism of Sulfur Absorption Via Samarium-doped Cerium Adsorbents in the Gas Atmosphere of O2/N2

The Role of Chemical Looping in Industrial Gas Separation

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