Task-specific ionic liquids as absorbents and catalysts for efficient capture and conversion of H2S into value-added mercaptan acids

Zhang, Xiaomin; Xiong, Wenjie; Shi, Mingzhen; Wu, Youting; Hu, Xingbang

doi:10.1016/j.cej.2020.127866

Cited by 81 publications

(40 citation statements)

References 53 publications

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“…They have many distinctive features, among which the extremely low volatility and unlimited structural designability are particularly attractive. Therefore, ILs have been proposed as promising alternatives to traditional solvents for application in gas absorption 17–24 . The extremely low volatility of ILs can minimize the volatile loss of solvents and unnecessary consumption of latent heats during gas absorption process.…”

Section: Introductionmentioning

confidence: 99%

Remarkable NH₃ absorption in metal‐based deep eutectic solvents by multiple coordination and hydrogen‐bond interaction

Cheng

Lan

et al. 2022

AIChE Journal

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The elimination and recycling of NH3 from the vented circulating stream of NH3 synthesis process is of great significance to the protection of air environment and saving of NH3 product. Deep eutectic solvents (DESs) with as many weak acidic sites as possible are anticipated to exhibit high efficiency for NH3 absorption at low pressures. Herein, we designed and prepared a series of metal‐based DESs by mixing EaCl, metal chloride (SnCl2, ZnCl2, FeCl3, or CoCl2), and Gly. The physiochemical properties, NH3 absorption performance, and mechanism of prepared metal‐based DESs were investigated systematically. It is found that considerably high solubilities of NH3 in DESs can be achieved by utilizing the multiple coordination and hydrogen‐bond interaction with NH3 provided by metal ions and Gly respectively. The values of NH3 solubilities (17.55 mol/kg at 298.2 K and 103.0 kPa, and 10.24 mol/kg at 298.2 K and 6.8 kPa) are the highest reported to date.

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Section: Introductionmentioning

confidence: 99%

Remarkable NH₃ absorption in metal‐based deep eutectic solvents by multiple coordination and hydrogen‐bond interaction

Cheng

Lan

et al. 2022

AIChE Journal

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“…Nowadays, Ionic liquids (ILs) are being investigated as potential CO 2 absorbents due to their unique characteristics, 4,5 such as wide liquid temperature range, negligible vapor pressure, and good chemical stability. Meanwhile, ILs were also put forward as the most promising “green solvents” and played a catalytic role in some chemical reactions in view of their low melting point, good recyclability, good thermal stability, and tunable physical and chemical properties 6,7 .…”

Section: Introductionmentioning

confidence: 99%

Performance and pressure drop ofCO₂absorption into task‐specific and halide‐free ionic liquids in a microchannel

Zhu

et al. 2022

AIChE Journal

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The gas–liquid two‐phase flow pattern, absorption rate and pressure drop of CO2 absorbed into the aqueous solution of the task‐specific ionic liquids (1‐aminopropyl‐3‐methylimidazole tetrafluoroborate [Apmim][BF4] and 1‐hydroxyethyl‐3‐methylimidazole tetrafluoroborate [OHemim][BF4]) and halide‐free ionic liquid 1‐butyl‐3‐methylimidazolium methylsulfate [Bmim][CH3SO4] were investigated in a microreactor. The absorption mechanism of the three ionic liquids was analyzed employing the 13C NMR spectroscopy. The [Apmim][BF4] was found to have the best ability of CO2 capture compared with the other two ionic liquids, as chemical absorption occurred between [Apmim][BF4] and CO2, while only physical absorption took place between [OHemim][BF4]/[Bmim][CH3SO4] and CO2. The sequence of CO2 absorption rate in three ionic liquids aqueous solutions is: [Apmim][BF4] > [Bmim][CH3SO4] > [OHemim][BF4]. Furthermore, the effects of gas–liquid flow rate and ionic liquids concentration on CO2 absorption rate and pressure drop were studied, the pressure drop models based on various flow patterns were proposed.

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“…Today, numerous types of ILs have been known and used in different backgrounds, including task specific-ionic liquids (TS-ILs), room temperature-ionic liquids (RT-ILs), chiral-ionic liquids (C-ILs), switchable polarity solvent-ILs (SPS-ILs), bio-ionic liquids (Bio-ILs), supported ionic liquids (S-ILs), basic ionic liquids (B-ILs), energetic-ionic liquids (E-ILs), neutral-ionic liquids ( N -ILs), metallic-ionic liquids (M-ILs), poly-ionic liquids (P-ILs), and protic-ionic liquids (Pr-ILs) [ 78 , 79 , 89 , 105 , 106 , 107 , 108 , 109 , 110 , 111 , 112 , 113 , 114 , 115 , 116 , 117 , 118 , 119 , 120 , 121 ]. Indeed, such huge variety of ILs is mainly owing to very high diversity in the number of anions and cations and also their own unique thermal and physicochemical features, including ionic conductivity and the ability to mix in organic and inorganic solvents [ 78 , 79 ].…”

Section: Ionic Liquids Structure and Propertiesmentioning

confidence: 99%

A Review on Ionic Liquids-Based Membranes for Middle and High Temperature Polymer Electrolyte Membrane Fuel Cells (PEM FCs)

Ebrahimi

Kujawski

Fatyeyeva

et al. 2021

IJMS

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Today, the use of polymer electrolyte membranes (PEMs) possessing ionic liquids (ILs) in middle and high temperature polymer electrolyte membrane fuel cells (MT-PEMFCs and HT-PEMFCs) have been increased. ILs are the organic salts, and they are typically liquid at the temperature lower than 100 °C with high conductivity and thermal stability. The membranes containing ILs can conduct protons through the PEMs at elevated temperatures (more than 80 °C), unlike the Nafion-based membranes. A wide range of ILs have been identified, including chiral ILs, bio-ILs, basic ILs, energetic ILs, metallic ILs, and neutral ILs, that, from among them, functionalized ionic liquids (FILs) include a lot of ion exchange groups in their structure that improve and accelerate proton conduction through the polymeric membrane. In spite of positive features of using ILs, the leaching of ILs from the membranes during the operation of fuel cell is the main downside of these organic salts, which leads to reducing the performance of the membranes; however, there are some ways to diminish leaching from the membranes. The aim of this review is to provide an overview of these issues by evaluating key studies that have been undertaken in the last years in order to present objective and comprehensive updated information that presents the progress that has been made in this field. Significant information regarding the utilization of ILs in MT-PEMFCs and HT-PEMFCs, ILs structure, properties, and synthesis is given. Moreover, leaching of ILs as a challenging demerit and the possible methods to tackle this problem are approached in this paper. The present review will be of interest to chemists, electrochemists, environmentalists, and any other researchers working on sustainable energy production field.

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Task-specific ionic liquids as absorbents and catalysts for efficient capture and conversion of H2S into value-added mercaptan acids

Cited by 81 publications

References 53 publications

Remarkable NH₃ absorption in metal‐based deep eutectic solvents by multiple coordination and hydrogen‐bond interaction

Remarkable NH₃ absorption in metal‐based deep eutectic solvents by multiple coordination and hydrogen‐bond interaction

Performance and pressure drop ofCO₂absorption into task‐specific and halide‐free ionic liquids in a microchannel

A Review on Ionic Liquids-Based Membranes for Middle and High Temperature Polymer Electrolyte Membrane Fuel Cells (PEM FCs)

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Task-specific ionic liquids as absorbents and catalysts for efficient capture and conversion of H2S into value-added mercaptan acids

Cited by 81 publications

References 53 publications

Remarkable NH3 absorption in metal‐based deep eutectic solvents by multiple coordination and hydrogen‐bond interaction

Remarkable NH3 absorption in metal‐based deep eutectic solvents by multiple coordination and hydrogen‐bond interaction

Performance and pressure drop ofCO2absorption into task‐specific and halide‐free ionic liquids in a microchannel

A Review on Ionic Liquids-Based Membranes for Middle and High Temperature Polymer Electrolyte Membrane Fuel Cells (PEM FCs)

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Product

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Remarkable NH₃ absorption in metal‐based deep eutectic solvents by multiple coordination and hydrogen‐bond interaction

Remarkable NH₃ absorption in metal‐based deep eutectic solvents by multiple coordination and hydrogen‐bond interaction

Performance and pressure drop ofCO₂absorption into task‐specific and halide‐free ionic liquids in a microchannel