CHEMICAL ENGINEERING SCIENCE
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2025
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IF 4.3
Yasen Dai,Xiaolei Song,Zerou Wang,Shuhang Ren,Yucui Hou,Weize Wu
Hydrogen sulfide (H 2 S) is a highly toxic and corrosive pollutant threatening human health and the environment. Ionic liquids (ILs) are widely used for H 2 S capture, but existing research focuses on conventional or alkaline functional ILs with low capacity or high energy consumption. This work synthesizes a novel oxidative functional IL, tetraethylammonium metavanadate ([N 2222 ][VO 3 ]), for dilute H 2 S absorption. With [Bmim][BF 4 ] as solvent, the mixture absorbs 1.13 mol H 2 S/mol IL at 50 °C and 0.005 MPa partial pressure. The IL mixture converts H 2 S to sulfur and water in situ and regenerates completely with oxygen at 80 °C for five cycles without capacity loss. Characterization and DFT calculations confirm vanadium’s key role in oxidative absorption, changing from V 5+ to V 3+ . The mechanism is verified at the molecular level. The mild regeneration temperature and sulfur recovery offer a scalable solution for low-energy desulfurization processes.
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高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2016
·Vol. 92
·期 4
·767-774
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IF 2.738
Xiaocai Meng,Jianying Wang,Haichao Jiang,Xiangjing Zhang,Shuolei Liu,Yongqi Hu
BACKGROUND Ionic liquids (ILs) have been widely used in the field of SO 2 separation for gases. In this study, two kinds of guanidinium-based dicarboxylic acid ionic liquids including [1,1,3,3-tetramethylguanidinium][Poly(ethylene glycol) bis(carboxymethyl) ether] ([TMG][PBE]) and [1,1,3,3-tetramethylguanidinium] [Suberic acid] ([TMG][SUB]) were synthesized, and their absorption and desorption performance of SO 2 were investigated. RESULTS The saturated molar ratio of SO 2 to [TMG][PBE] and [TMG][SUB] were 8.74 and 5.96 mol SO 2 per mole ILs at 25 °C, respectively. [TMG][PBE] saturated with SO 2 was easier to desorb and could be recycled at least 5 times without loss of initial performance, while the ability to absorb SO 2 by [TMG][SUB] was gradually weakened after desorption. The absorption mechanism is discussed. Results showed that SO 2 could interact not only with the amino group on the cation but also with the methylene bonded to the carbonyl carbon on the anion for [TMG][SUB]. As for [TMG][PBE], SO 2 could interact with the ether group by S-O ligand interaction, instead of interacting with the methylene group bonded to the carbonyl carbon on the anion. [TMG][PBE] show good performance for SO 2 capture. CONCLUSION The anion of dicarboxylic acid-based ILs plays an important role in absorption/desorption of SO 2 on the basis of the experimental results. © 2016 Society of Chemical Industry
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NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Huiyao Yang,Bingxi Song,Peihong Zhang,Qijie Zhu,Fu Ding,Yao-Feng Wang,Guliang Liu,Yanyan Diao,Hongyan Wang
Perfluoro olefins, as one of the most promising fluorinated coolants, support the application of immersion liquid cooling technology. Ionic liquid catalysts exhibit significant potential in olefin oligomerization reactions. In this paper, a variety of thiocyanate ionic liquids with strong nucleophilicity were designed and synthesized for hexafluoropropylene trimerization. DABCO-based ionic liquids exhibited a selectivity 24% higher and a turnover frequency (TOF) 9 times greater than those of conventional catalysts. Under optimal reaction conditions, [C8DABCO][SCN] achieved up to 86.6% selectivity and 151.6 h-1 TOF. As demonstrated by the experimental results and density functional theory (DFT) calculations, the enhanced catalytic efficacy of [C8DABCO][SCN] can be ascribed to the nucleophilic anion, in conjunction with the cation endowed with a cyclic structure and nitrogen atom lone pair of electrons. The trimerization reaction pathway was further proposed based on the product distribution.
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JOURNAL OF CHEMICAL THERMODYNAMICS
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2023
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IF 2.6
Fuxin Yang,Bangju Wang,Yanhao Jiao,Houzhang Tan,Xiaopo Wang
Due to the lower boiling point and high solubility, ionic liquids are considered as the green and environmentally friendly chemicals, and widely studied in the absorption refrigeration cycles. However, the ionic liquids always possess high viscosity. In this work, 2,2,2-trifluoroethanol (TFE) was selected as a solvent to reduce the viscosity of ionic liquids. The densities and viscosities of TFE with three ionic liquids were measured at atmospheric pressure and temperature in the range of 293.15–333.15 K. The effect of solvents on reducing the viscosity of ionic liquids was analyzed. The excess properties of mixtures were calculated to analyze the interaction of the binary mixtures. The hard-sphere model was used to study the viscosity of pure substances and binary mixtures to further understand the interactions between ionic liquids and TFE.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2023
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IF 6
Yiru Gao,Yang Shu
Active Pharmaceutical Ingredients-Ionic liquids (API-ILs) can overcome the defects of solid drugs without changing the structure of drug molecules and increase drug solubility and bioavailability. In the present work, tetracycline (Tet) was used as the active drug and ethanoic acid (Gly) and salicylic acid (Sa) were selected as the anion to prepare tetracycline ionic liquid ([Tet][Gly] and [Tet][Sa]), respectively. The physical properties of [Tet][Gly] and [Tet][Sa], such as crystallinity, thermal stability and solubility, were investigated. And tetracycline-resistant Escherichia coli was selected as a bacterial model to study the bioavailability changes of tetracycline ionic liquids.
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高影响因子
CHEMOSPHERE
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2022
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IF 8.943
Fan Ye,Liwei Shen,Shi Liu,Huanyu Liu,Xinyuan Zhang,Zejun Zhang,Ying Yang,Xuening Feng,Yuqi Tang,Dong Xiang,Yuanzhu Mi,Xuemin Yan
This work aims to prepare two new amphiphilic and interfacial active gemini ionic liquids to treat crude oil and investigates its demulsification mechanism. Tetraethylene glycol was pretreated with thionyl chloride and used as a linker to connect succinimide or phthalimide , and then reacted with dodecyl benzene sulphonic acid to obtain the corresponding amphiphilic and interfacial active gemini ionic liquid STA or PTA, respectively. 1 H nuclear magnetic resonance spectroscopy ( 1 HNMR) and Fourier-transform infrared spectroscopy (FTIR) was used to determine the chemical structures. The demulsification tests showed the demulsification efficiency with 150 mg/L of STA or PTA at 60 °C for 30 min was 99.89% and 99.79%, respectively. Furthermore, the demulsification mechanism of STA and PTA were studied and the prominent demulsification ability of STA and PTA were attributed to the better interfacial activity and amphipathy which could destroy the asphaltenes interfacial film. These results showed that STA and PTA had excellent demulsification efficiency, which promised application in petroleum industry .
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PubMed
高影响因子
TRIBOLOGY INTERNATIONAL
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2022
·
IF 5.62
Hongling Fang,Yi Li,Songwei Zhang,Qi Ding,Litian Hu
In this work, the functional protic ionic liquid (PIL) of dibutylammonium 3-(methylthio) propionate ([N44HH][MTP]) with good lubrication properties but poor oil solubility and the common PIL of dioctylammonium oleate ([N88HH][OA]) with good oil solubility but poor lubricating performance were selected. The binary ionic liquid (BIL) of [N88-N44][OA-MTP] was creatively obtained by combining [N44HH][[MTP] with [N88HH][OA]. Interestingly, the BIL has good oil solubility in PAO base oil and maintains outstanding lubricating performance, indicating that such an approach improves the oil solubility of functional PILs without worsening lubrication properties. In addition, the compatibility between two PILs and the lubrication mechanism of the BIL system were analyzed and described by means of several analytical methods.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2022
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IF 6.633
Xiaoqi Lin,Kaisen Jiang,Xuebin Liu,Dezhi Han,Qinqin Zhang
Lignocellulosic biomass as the renewable and abundant resource in the earth can be transformed into bio-based chemicals and fuels with high added value, which is the preferable substitute for traditional fossil resources. The design and improvement of catalysts and pretreatment solvents are crucial to achieve the low-cost, efficient, and green conversion of biomass resources. Ionic liquids exhibit many advantages in biomass pretreatment and conversion because of their high catalytic efficiency, high solubility, unique molecular structure, and recyclable property. The present review aimed to summarize the research achievements and progress of ionic liquids as solvents or catalysts in the pretreatment of lignocellulosic biomass, transformation of polysaccharides into platform chemicals and isolation, depolymerization, and functional modification of lignin. The review concludes with a brief perspective on possible challenges and strategies for the sustainable development of ionic liquids in lignocellulosic biomass refining.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2020
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IF 5.065
Meisi Chen,Xindian Wang,Xiemin Liu,Youting Wu,Feng Zhang,Zhibing Zhang
Anhydrous “Dry Ionic Liquids” (D-ILs) were prepared by wrapping task functionalized ionic liquid solutions of ethylene glycol or glycerol with hydrophobic silica nanoparticles , to form micron-sized particles with fluidity for rapid capture of CO 2 . The anhydrous D-ILs not only play the advantages of two substances: the stability of ionic liquid and the micro-size of “Dry matter”, but also effectively overcome the shortcomings of high viscosity of ILs and the water loss of dry matters containing aqueous solutions. Physical properties of these D-ILs, including true density, specific surface area and mean size were determined to evaluate the influence of the solution concentration on the micron particle morphology. The CO 2 capture capacity and capture rate of D-ILs were also investigated and compared with those of the corresponding solutions. It is confirmed that the D-ILs exhibit significantly high speed for CO 2 capture, excellent absorption capacity and considerable regeneration efficiency. The micron structure of D-ILs can completely overcome the resistance of high viscosity and thereby plays out the chemical characteristics of task specific ionic liquids (TSILs).
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高影响因子
ACS Applied Nano Materials
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2019
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IF 0
Ruotong Zhao,Xiaotian Yu,Dayin Sun,Liyan Huang,Fuxin Liang,Zhengping Liu
Snowman-like silica@PDVB/PS Janus particles were fabricated via seeded emulsion polymerization and modified with hydrophilic ionic liquid moieties. The Janus particles can readily be further modified by incorporating new functionalities through simple anion exchange. PW12O403– as a catalytically active species for dye degradation was introduced into the Janus particles, and the performance in the catalytic degradation of methyl orange was evaluated.
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CHEMICAL ENGINEERING RESEARCH & DESIGN
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2019
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IF 3.073
Yunchang Fan,Dongxu Cai,Lei Yang,Xiaoyuan Chen,Lei Zhang
Present work explored the potential of the use of hydrophobic ionic liquids (ILs) for the extraction of high-value products nicotinic acid (NA) and niacinamide from aqueous phase. The extraction efficiency highly depended on the chemical structures of ILs. The increase in the side chain length of the ILs leaded to the decrease of the extraction efficiency due to the steric hindrance. The non-covalent interactions, such as hydrophobic interaction, hydrogen bonding and π–π interaction were the driving forces in the extraction processes. Thermodynamic study suggested that hydrogen bonding was the main driving force for the extraction of NA, while the extraction of niacinamide was mainly driven by hydrophobic interaction. Compared with conventional solvents, ILs exhibited higher extraction efficiency. Furthermore, the ILs can be reused without losing their extraction ability.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2018
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IF 6.578
Qiaozhen Chen,Qingchun Ge,Wenxuan Xu,Wenbin Pan
Carboxylate-functionalized imidazolium ionic liquids (CFIMILs) were synthesized via a one-pot quaternization reaction and serve as draw solutes for the first time for forward osmosis (FO) desalination. It provides a solution to simultaneously overcome the problems plaguing the use of pressure-driven membrane technologies to extract water from saline water – low water recovery efficiency and high reverse solute diffusion. The CFIMILs contain a substituted 5-membered imidazole ring and fully ionize into ionic species in water. These characteristics endow CFIMILs with capability of high water recovery efficiency and minimal reverse diffusion in FO. Sodium salt of 1-acetate-2,3-dimethyl imidazole ionic liquid (IL-1) at 0.8 M produces water fluxes of 63.6 LMH (PRO mode) and 29.5 LMH (FO mode) against the DI water feed, greatly outperforming conventional NaCl draw solute and other synthetic draw solutes. Efficient water recovery is achieved using IL-1 for seawater desalination with a water flux 5 times higher than that of NaCl. Particularly, CFIMILs draw solutes have negligible reverse diffusion in FO and are recycled completely via an MD process with good reproducibility when reused to FO, demonstrating great potentials of CFIMILs as a new class of draw solutes for FO water treatment.
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高影响因子
危险品化学品经营许可证（带存储）