Article
Polymer Science
Valeriia Rostovtseva, Alexandra Pulyalina, Roman Dubovenko, Ilya Faykov, Kseniya Subbotina, Natalia Saprykina, Alexander Novikov, Ludmila Vinogradova, Galina Polotskaya
Summary: Modification of polymer matrix by hybrid fillers has shown promising improvement in separation efficiency of membranes, especially for lactic acid dehydration. The combination of ionic liquid and heteroarm star macromolecules as additives in the polymer matrix enhances the separation factor and performance of membranes, offering potential for membrane design in various industries.
Article
Engineering, Chemical
Xinyu Li, Xiaojia Wu, Hui Yu, Chuanqi Geng, Haiguo Wei, Zhiyong Zhou, Zhongqi Ren
Summary: DBU-based ILs ([Bz-DBU]NTF2) were designed and synthesized based on the structural designability of ionic liquids (ILs). Their physical properties were analyzed and they showed highly selective separation between aromatic and alkane compounds. The IL demonstrated good stability and could effectively remove bicyclic alkanes and aromatics from simulated diesel and real diesel, meeting the quality standards for high-quality ethylene cracking feedstock.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Physical
Guoqing Wu, Ying Liu, Guangliang Liu, Ruisheng Hu, Guanjun Gao
Summary: It was found that aromatics interacted with ions in chloroaluminate ionic liquids (CIL), forming new species that buffer acidity, modify activity, and promote the alkylation reaction. This insight enhances our understanding of the effects of ions on CIL alkylation.
JOURNAL OF CATALYSIS
(2021)
Article
Engineering, Chemical
Yuxiu Sun, Yunshuo Gao, Chenxu Geng, Zhengqing Zhang, Zhihua Qiao, Chongli Zhong
Summary: Metal-organic frameworks (MOFs) are commonly used as fillers in mixed matrix membranes (MMMs) to enhance gas separation performance. However, non-selective interface defects and discontinuous dispersion of MOF particles in polymeric matrices affect the efficiency of molecular transfer. This study successfully constructs a defect-free mixed matrix ion gel membrane by embedding [C5min][BF4] encapsulated ZIF-67 (IL@ZIF) composites into an IL/Pebax ion gel matrix, resulting in a CO2 permeability of 408.2 Barrer and CO2/N2 selectivity of 97.2 with 80 wt% IL content and 70 wt% IL@ZIF doping amount. This work has significant reference value for the development of high-performance MOF-based MMMs for gas separation.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Review
Chemistry, Physical
Hosni Ahmed Elwan, Ravikumar Thimmappa, Mohamed Mamlouk, Keith Scott
Summary: Poly ionic liquids (ILs), which combine the conventional features of polymers with unique characteristics of ILs, are being increasingly explored for advanced electrochemical applications like fuel cells. This review focuses on the applications of poly ILs in polymer electrolyte membrane fuel cells (PEMFCs), including different approaches to incorporating poly ILs in polymer electrolyte membranes (PEMs) and their performance in PEMFCs. Additionally, the contributions of poly ILs in improving the cathodic oxygen reduction reaction (ORR) of PEMFCs are discussed, along with recommendations for future research and usage of poly ILs in PEMFCs.
JOURNAL OF POWER SOURCES
(2021)
Article
Engineering, Chemical
Shengnan He, Eiji Kamio, Jinhui Zhang, Atsushi Matsuoka, Keizo Nakagawa, Tomohisa Yoshioka, Hideto Matsuyama
Summary: We developed a tough and highly CO2-permeable ion gel membrane by combining a CO2-philic ionic liquid (IL) and an interpenetrating polymer network (IPN). The membrane exhibited high mechanical strength and good IL-holding properties, enabling high and selective CO2 permeability. The CO2 permeability and CO2/N2 permselectivity were enhanced by increasing the IL content in the membrane. These excellent properties were maintained even after physical aging for one week.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Applied
Yunmei Wu, Hui Tan, Liangbin Lin, Hongyu Guo, Fafu Yang
Summary: In this study, Gemini-type fluorescence ionic liquid crystals (ILCs) were prepared and investigated. These ILCs emitted strong fluorescence in aggregated states and exhibited reversible smectic mesophase. The stable gels formed in DMSO-toluene system showed excellent thermal reversible response. The novel ILCs with C6H13 chains presented orderly rectangular columnar stacking in the gel phase.
Article
Environmental Sciences
Imran Khan Swati, Qazi Sohaib, Shuyun Cao, Mohammad Younas, Dan Liu, Jianzhou Gui, Mashallah Rezakazemi
Summary: Four ionic liquids were synthesized for the separation of gases CO2/N-2 and CO2/CH4 through supported ionic liquid membranes (SILMs), with [BSmim][tos] showing the highest solubility coefficient and permeability, as well as the highest selectivity values. The ILs synthesized for this work can be ranked as [BSmim][tos] > [BSmpy][tos] > [Bmim][Cl] > [Bpy][Cl], indicating their potential use for CO2 separation through SILMs.
Article
Biotechnology & Applied Microbiology
Xiaojia Wu, Xinyu Li, Lei Xu, Wei He, Zhiyong Zhou, Wei Liu, Fan Zhang, Zhongqi Ren
Summary: The study successfully synthesized silver ion liquid, which effectively enhanced the separation performance through extraction and membrane processes, providing a promising alternative technology for the separation of olefins and alkanes.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2022)
Review
Biochemistry & Molecular Biology
Karel Friess, Pavel Izak, Magda Karaszova, Mariia Pasichnyk, Marek Lanc, Daria Nikolaeva, Patricia Luis, Johannes Carolus Jansen
Summary: Ionic liquids have garnered attention for their unique properties and potential applications in various fields such as chemical synthesis, energy storage, and gas separation. Research on ionic liquid membranes has been extensive in the past fifteen years, exploring different materials and membrane types for gas separation processes. Ionic liquid membranes show promise as an energy-efficient alternative for complex separation challenges, indicating a potential role in sustainable future society.
Article
Engineering, Chemical
Hongye Cheng, Guojin Zhang, Yaxi Zhang, Zhen Song, Zhiwen Qi
Summary: This study systematically investigates the effect of aromatic and alkane structures on extraction performance from experimental and theoretical perspectives. Liquid-liquid extraction experiments show that the distribution coefficient and extraction efficiency depend on the aromatic structure, while the selectivity and theoretical purity of aromatics rely on the alkane structure. Molecular dynamics simulation is used to elucidate the extraction mechanism. Process simulation using the NRTL thermodynamic model confirms that a high extraction performance can be achieved for model LCO containing more diaromatics. It is therefore preferable to incorporate aromatics-alkanes extractive separation into the pre-hydrotreating step of LCO upgrading process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Shunsuke Yamada
Summary: Choline lactate, a bioderived ionic liquid, shows potential for the development of biodegradable electrochemical devices. Adding metal ions to the ionic liquid imparts electrochemical characteristics, and combining it with poly(vinyl alcohol) results in a biodegradable ionic gel. An electrochromic device using a Li-ion containing ionic liquid successfully changes color, indicating intercalation of Li-ions into the WO3 crystal. These findings suggest that electrochemically active ionic liquids have applications in environmentally friendly devices, sustainable electronics, and bioresorbable/implantable devices.
Article
Chemistry, Multidisciplinary
Hasan T. Imam, Kyle Hill, Andrew Reid, Stefan Mix, Patricia C. Marr, Andrew C. Marr
Summary: An entrapment method for enzyme immobilization without the formation of new covalent bonds is reported. Ionic liquid supramolecular gels containing enzymes can be made into gel beads and used as recyclable immobilized biocatalysts. The gel, formed from a hydrophobic phosphonium ionic liquid and a low molecular weight gelator derived from phenylalanine, allows for 10 runs of recycling without activity loss and retains activity for at least 150 days. No covalent bonds are formed during gel formation, which is supramolecular, and there are no bonds between the enzyme and the solid support.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Engineering, Chemical
Xiao Xu, Gilles Van Eygen, Cristhian Molina-Fernandez, Daria Nikolaeva, Ysaline Depasse, Sara Chergaoui, Yusak Hartanto, Bart Van der Bruggen, Joao A. P. Coutinho, Anita Buekenhoudt, Patricia Luis
Summary: This study investigates the use of task-specific ionic liquids (TSILs) in the form of supported ionic liquid membranes (SILMs) for the separation and purification of dimethyl carbonate (DMC) through pervaporation. The results show that SILMs exhibit higher selectivity at low temperatures and an increase in temperature negatively affects the permeance of DMC and methanol.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Yunfei Yu, Xue Yang, Chenchen Zhang, Jie Chen, Wei Lin, Jianqiang Meng
Summary: This study reports an environmentally friendly and simple approach for preparing double-network (DN) ion gel membranes with high strength and excellent gas separation performance. By optimizing crosslinking density, mass ratio, and the type and content of free ionic liquid, the mechanical and gas separation properties of the DN membrane are improved.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Yunfei Yu, Xue Yang, Chenchen Zhang, Jie Chen, Wei Lin, Jianqiang Meng
Summary: This study reports an environmentally friendly and simple approach for preparing double-network (DN) ion gel membranes with high strength and excellent gas separation performance. By optimizing crosslinking density, mass ratio, and the type and content of free ionic liquid, the mechanical and gas separation properties of the DN membrane are improved.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Si-qi Jiang, Qiang Gao, Xi-guang Li, Chao-zhu Deng, Jun Qiu, Xiang-nan Zhu
Summary: A dual-strengthening pretreatment method is proposed to remove PVDF more efficiently and enhance the leaching of LiCoO2. Experimental results show that dual-strengthening pretreatment can effectively remove PVDF and significantly improve the leaching efficiency compared to single pretreatment methods.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zengchi Hu, Xiaoyu Wang, Xiaohui Zhang, Xue Li, Jiangbin Xia
Summary: The rapid fabrication of high-performance composite membranes based on CMPs using simple and low-cost methods is challenging. In this study, three CMPs-based composite membranes were rapidly fabricated with adjustable size using unidirectional diffusion synthesis. The microstructural design enhanced the rejection rates of the membranes and they showed strong hydrolytic resistance, thermal stability, and acid-base resistance. Electrostatic adsorption and the adjustable microstructures significantly varied the repellence of the membranes to different charged molecules.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Farzaneh Rouhani, Matineh Ayedi, Nasser Safari
Summary: Introducing defects into porous metal-organic frameworks is important for improving their adsorption performance. Quasi-MOFs, an underutilized variant of large-scale, fundamentally deficient MOFs, have been found to have substantial amounts of unsaturated metal sites to offset the drawbacks of MOFs. In this study, a quasi-MOF was produced using a water-stable MOF and demonstrated significantly improved phosphate adsorption capability due to the presence of defect sites.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Valentin Reungoat, Morad Chadni, Louis M. M. Mouterde, Fanny Brunissen, Florent Allais, Helene Ducatel, Irina Ioannou
Summary: This study focuses on the recovery of sinapic acid using liquid-liquid extraction assisted by a hollow fiber membrane contactor from an aqueous feed obtained through the hydrolysis of mustard bran. The screening of solvents of different chemical nature showed that all tested solvents had an extraction efficiency of more than 80% for pH < 5. Four solvents were selected for use in the hollow fiber membrane contactor, and the volatile solvents showed higher mass transfer coefficients compared to non-volatile solvents. The extraction efficiency was intensified by increasing the initial concentration of sinapic acid and the feed-to-solvent ratio. CPME was found to have optimal recovery efficiency at a phase ratio of 8:1, yielding 0.9 g of sinapic acid per liter of CPME used.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Takahiro Sakamoto, Takafumi Hanada, Hayate Sato, Mayu Kamisono, Masahiro Goto
Summary: The emergence of the battery society has led to a high demand for battery metals, resulting in a strain on their supply. This study introduces a novel technique using a hydrophobic deep eutectic solvent (DES) for leaching and recovering battery metals from low-grade nickel laterite ores. The DES enables selective leaching and recovery of the metals, offering a promising pathway for the extraction of critical battery metals.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Rongrong He, Jiarui Chen, Chunyao Zhang, Dan Lu, Lin Zhang, Tao He
Summary: Researcher has developed a method to quantify the charge density in nanofiltration (NF) membrane separation layer and applied it in NF membranes that can separate Mg2+ and Li+. The results showed that overcompensated amine groups played a major role, and there was a linear relationship between charge density and coating bi-layers or PAH layers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zhijian Zhang, Min Chen, Zhe Lin, Zhichao Yang, Yafeng Du, Zhihui Chen, Zhenhao Yang, Kongyin Zhao, Ligang Lin
Summary: Membrane technology plays an important role in molecular/ion separation processes, but faces challenges such as membrane fouling. This study introduces a new ion-crosslinking method to fabricate copper alginate hydrogel membranes with improved mechanical strength and antimicrobial capabilities. The membranes exhibit excellent separation performance and enhanced long-term molecule/ion separation through improved anti-swelling properties. Molecular dynamics simulations and life cycle analysis highlight the pore structure and environmental friendliness of the hydrogel membranes. These findings provide valuable insights for developing sustainable hydrogel membranes with stable performance and high separation efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Dongmei Liu, Aiying Guo, Yanling Qi, Zhixin Ji, Hongjuan Li, Zhiwei Zhang, Xinyue Zhang, Kunze Wu, Aijun Cai
Summary: In this study, a stable magnetic Mg/Mn-layered double oxide-doped biochar composite (MgMnLDO-MBC) was prepared and successfully used for the removal of antibiotics and bacteria from wastewater. The composite exhibited enhanced surface areas, adsorption sites, and free radicals, leading to improved catalytic activity. The effects of different factors on the removal efficiency were evaluated, and the composite showed good reusability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Feng Wang, Zhaoyong Bian, Yaru Zhang, Wenchao Yu, Qiang Zhang, Hui Wang
Summary: In this study, a nanofibrous layered structure of Ff-Ti3C2Tx-Co3O4 was prepared by self-assembling nanofibrous Co3O4 with lamellar fluorine-free MXene (Ff-Ti3C2Tx). The Ff-Ti3C2Tx-Co3O4 exhibited excellent catalytic activity for degradation, resistant to ionic interference, and maintained high removal efficiency of sulfamethoxazole (SMX) in municipal wastewater. The rapid SMX degradation involved fast electron transfer in redox cycles with PMS and the generation of 1O2 via PMS ->center dot O2 -> 1O2. This work provides new insights into antibiotic degradation mechanisms and electron transfer based on PMS activation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Weipeng He, Jiacheng Luo, Yujie Wu, Tianhao Luo, Chen Tang
Summary: This study comparatively evaluated the role of cationic, anionic, and nonionic polyacrylamides (PAMs) in ballasted flocculation of clay suspensions under different aluminum sulfate (AS) coagulant dosages. The selection of PAMs and AS dosage had a significant influence on the size and shear resistance of ballasted floc aggregates.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Lixian Wang, Lizhi Zhao, Didi Si, Zhixin Li, Huiqin An, Hui Ye, Qingping Xin, Hong Li, Yuzhong Zhang
Summary: Metalloporphyrin-based nanozymes integrated with poly (vinylidene fluoride) membrane show high catalytic activity and reusability for the decolorization of Congo Red dye in continuous flow process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Yongfei Ma, Chenyu Zeng, Yongzhen Ding, Jiayi Tang, Ondrej Masek, Zhikang Deng, Rui Mu, Zulin Zhang
Summary: In this study, sludge-derived biochar (SBC) was functionalized with various iron salts to enhance its adsorption ability for sulfamethoxazole (SMX) and magnetic collection performance. Ball milling was further employed to treat the optimal iron salt functionalized SBC (MSBC), resulting in ball milled SBC (BMSBC) with improved adsorption performance for SMX. The dominant driving mechanism for SMX adsorption onto BMSBC was confirmed to be multiple physicochemical forces, including 7C-7C conjugation, pore filling, H-bonding, Fe-O complexation, and electrostatic interactions. BMSBC exhibited favorable adsorption ability for SMX in actual waters and could be easily collected within 1 min due to its magnetic sensitivity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jinglin Tan, Xiaohui Mao, Wenjihao Hu, Hongbo Zeng
Summary: This study investigates the influence of PDMS chain architectures on surface properties and reveals that PDMS coatings with looped structures exhibit superior hydrophobicity, self-cleaning, and water sliding compared to coatings with linear structures. Additionally, both looped and linear PDMS coated stainless steel mesh/polyester fibers show efficient separation of oil/water mixture.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Wei-Liang Chen, Chih-Chia Cheng, Chien-Hsing Lu, Jem-Kun Chen
Summary: This study designs a novel sandwich-structured capacitor that reduces the absorption time of pollutants using dielectrophoresis force. By coating graphene oxide on polystyrene microspheres as adsorbents and encapsulating them within the capacitor, the adsorption rate is significantly enhanced. Additionally, frequency manipulation allows for the recycling of adsorbents and concentration of dyes, minimizing secondary pollution.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)