Zeolite Supported Ionic Liquid Improved by Cyclodextrins for Efficient Removal Capacity of H<sub>2</sub>S

Ma, Yunqian; Mao, Jiaming; Xiao, Cong; Zhao, Tongtong; Zang, Lihua

doi:10.1246/cl.180812

Cited by 8 publications

(8 citation statements)

References 19 publications

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“…It has been shown that the adsorption efficiency of zeolites may be improved by the use of another host molecule. Higher sulfur capacity is observed over Zeolites modified with metals or metal oxides . According to the literature, several reaction mechanisms might be occurred during the H 2 S adsorption by zeolites impregnated with metal oxides.…”

Section: Zeolitementioning

confidence: 92%

“…Higher sulfur capacity is observed over Zeolites modified with metals or metal oxides. 132 According to the literature, several reaction mechanisms might be occurred during the H 2 S adsorption by zeolites impregnated with metal oxides. In fact, H 2 S can be adsorbed by the metal cation site and oxide site presented in the structure.…”

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 99%

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Removal of Hydrogen Sulfide from Gas Streams Using Porous Materials: A Review

Khabazipour

Anbia

2019

Ind. Eng. Chem. Res.

126

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Removal of hydrogen sulfide (H2S) released from various source processes is crucial because this compound can cause corrosion and environmental damage even at low concentration levels. The porous materials offer a wide variety of chemical architectures with tunable pore size and high surface area that are very promising for the adsorption of H2S molecules. This review attempts to comprehensively compile the current studies in the literature on hydrogen sulfide removal in gas purification processes using highly porous materials such as zeolites, carbon materials, activated carbon, porous metal oxides, mesoporous silica, and metal–organic frameworks as highly effective adsorbents. Possible interactions between the H2S and active adsorption sites of these materials are also discussed. Surface functionality and porosity play a crucial role in the H2S removal performance by virgin or modified porous materials. However, tailoring these materials to obtain high adsorption capacity, good selectivity, and suitable stability and regenerability and to retain structural integrity under high temperatures or in the presence of moisture are still the major challenges in the practical applications. According to the extensive background knowledge for H2S removal by different porous materials in this review, it can be expected that readers will gain insight into the further developments in this area and the design of new cost-effective sorbents.

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Section: Zeolitementioning

confidence: 92%

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 99%

Removal of Hydrogen Sulfide from Gas Streams Using Porous Materials: A Review

Khabazipour

Anbia

2019

Ind. Eng. Chem. Res.

126

View full text Add to dashboard Cite

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“…This phenomenon can be explained by the "like dissolves like" principle, which means polar H 2 S is easier to dissolve into polar IL compared with CH 4 . 28 Ishak et al 88 Ma et al 90 prepared a novel metal-based IL, triethylamine hydrochloride copper chloride (Et 3 NHCl•CuCl 2 ), and compared the adsorption performance of H 2 S in pure zeolite, cyclodextrin-grafted zeolite (CDGZ), zeolite-supported IL (ILzeolite), and cyclodextrin-modified zeolite-supported IL (IL-CDGZ). The order of H 2 S removal capacity is CDGZ < zeolite < IL-zeolite < IL-CDGZ.…”

Section: Il-reinforced Adsorbents and Membranesmentioning

confidence: 99%

Rotten Eggs Revaluated: Ionic Liquids and Deep Eutectic Solvents for Removal and Utilization of Hydrogen Sulfide

Laaksonen

Zhang

et al. 2022

Ind. Eng. Chem. Res.

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Hydrogen sulfide (H2S) is highly toxic and one of the problematic impurities in industrial gas streams, calling for H2S removal down to single-digit ppm levels to protect health and environment, and not to harm to the downstream processes. Here, we discuss the recent developments and challenges of current H2S removal technologies. Furthermore, we present a comprehensive review of H2S removal in ionic liquids (ILs), IL-based solvents/adsorbents/membranes, and deep eutectic solvents (DESs) due to their unique advantages. We analyze theoretical studies to better understand the microscopic details behind H2S removal. We discuss new research on IL/DES-based H2S removal processes from an industrial perspective. Finally, we summarize the utilization of H2S in IL/DES-based systems for the recovery of sulfur and hydrogen, and synthesis of value-added chemicals. This review will provide both general and in-depth knowledge of the achievements, difficulties, and research priorities in developing novel ILs/DESs for efficient and sustainable H2S removal and utilization.

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“…Alternatively, the supported MILs materials such as 5%[Bmim]Cl·CuCl 2 @silica and Et 3 NHCl·CuCl 2 @cyclodextrins modified zeolite have been designed to overcome the mass transfer limited by the high viscosity of ILs. , …”

Section: Oxidative Desulfurization Of H2s In Milsmentioning

confidence: 99%

“…Alternatively, the supported MILs materials such as 5% [Bmim]Cl•CuCl 2 @silica and Et 3 NHCl•CuCl 2 @cyclodextrins modified zeolite have been designed to overcome the mass transfer limited by the high viscosity of ILs. 114,115 As to the regeneration process of the Fe-based ILs, O 2 regeneration is the most commonly used technology to convert Fe(II)-ILs into Fe(III)-ILs due to the environmentally friendly property and low cost of oxygen. To achieve the complete regeneration of [Bmim]Fe(II)Cl 4 to [Bmim]Fe(III)Cl 4 , it can be realized by air at room temperature for 80 h and at 50 °C for 20 h but at room temperature for 7 h and at 50 °C for 3 h regeneration by oxygen.…”

Section: Oxidative Desulfurization Of H 2 S In Milsmentioning

confidence: 99%

Metal-Based Ionic Liquids in Oxidative Desulfurization: A Critical Review

Fen

Qazi

et al. 2021

Environ. Sci. Technol.

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Ionic liquids (ILs) as novel functional desulfurization materials have attracted increasing attentions. Metal-based ionic liquids (MILs) are classified into three types of metal chloride ILs, metal oxide ILs, and metal complex ILs based on the definition and basic structure of MILs in this critical review. On the basis of the properties of ILs such as structure designability, super dissolution performance, good thermal and chemical stability, nonflammability, and wide electrochemical window, MILs exhibit unique advantages on hydrophobicity, oxidation performance, and Bronsted−Lewis acidity. Therefore, MILs possess both the absorption and oxidation centers for the intramolecular adsorption and oxidation to improve the oxidative desulfurization (ODS) process. During the novel nonaqueous wet oxidative desulfurization process (Nasil), H 2 S can be oxidized into elemental sulfur with hydrophobic MILs, which can be regenerated by oxygen for recycle, to solve the problems of low sulfur capacity, low sulfur quality, and severe secondary pollution in the aqueous Lo-Cat wet oxidative desulfurization process. Another outstanding feature of MILs in ODS is biomimetic catalysis, which has the function of activating molecular oxygen and improving the oxidation performance. Metal oxide ILs and metal complex ILs are used in combination with hydrogen peroxide or oxygen with the existing water to generate a Fenton-like reaction to convert hydrophobic organic sulfur or SO 2 into hydrophilic sulfoxide/sulfone or sulfur acid, respectively. However, the corrosion of Cl − to the equipment and emulsification phenomenon in the extraction process of sulfoxide/sulfone separation still need further study. Furthermore, the promising strategies to construct highly efficient and green desulfurization processes for large-scale applications are provided.

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Zeolite Supported Ionic Liquid Improved by Cyclodextrins for Efficient Removal Capacity of H₂S

Cited by 8 publications

References 19 publications

Removal of Hydrogen Sulfide from Gas Streams Using Porous Materials: A Review

Removal of Hydrogen Sulfide from Gas Streams Using Porous Materials: A Review

Rotten Eggs Revaluated: Ionic Liquids and Deep Eutectic Solvents for Removal and Utilization of Hydrogen Sulfide

Metal-Based Ionic Liquids in Oxidative Desulfurization: A Critical Review

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Zeolite Supported Ionic Liquid Improved by Cyclodextrins for Efficient Removal Capacity of H2S

Cited by 8 publications

References 19 publications

Removal of Hydrogen Sulfide from Gas Streams Using Porous Materials: A Review

Removal of Hydrogen Sulfide from Gas Streams Using Porous Materials: A Review

Rotten Eggs Revaluated: Ionic Liquids and Deep Eutectic Solvents for Removal and Utilization of Hydrogen Sulfide

Metal-Based Ionic Liquids in Oxidative Desulfurization: A Critical Review

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Zeolite Supported Ionic Liquid Improved by Cyclodextrins for Efficient Removal Capacity of H₂S