Article
Engineering, Chemical
Peng Du, Jieyu Song, Xuerui Wang, Yuting Zhang, Jixian Xie, Gang Liu, Yongli Liu, Zhenwei Wang, Zhou Hong, Xuehong Gu
Summary: Efficient hydrogen separation is crucial from the cracked tail gas of ethylene plant. DD3R zeolite membranes were developed for this purpose, showing high selectivity and stability under harsh conditions. The efficient scale-up synthesis method led to the production of high-quality membranes suitable for industrial applications.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Environmental
Aditya Tripathi, Nilotpala Bej, Satyabati Das
Summary: Carbon dioxide, although only accounting for a small percentage in the atmosphere, is a crucial gas contributing to pollution through the greenhouse effect. Technological advancements and industrialization are primary sources of CO2 emissions, necessitating sustainable methods to balance environmental concerns with progress. Research on small-scale extraction methods may provide practical solutions for managing CO2 levels in various settings, such as hospitals and convention halls.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Review
Chemistry, Multidisciplinary
Rupam Sahoo, Supriya Mondal, Debolina Mukherjee, Madhab C. Das
Summary: Efforts have been made to separate CO2 from flue gas and biogas using nonthermal-based separations, such as adsorption-based or membrane-separation technology employing metal-organic frameworks (MOFs). This review summarizes the strategies, performance parameters, and molecular-level mechanisms of such separations, and offers critical insights and future recommendations for further development of MOF materials as flue and biogas separators.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Engineering, Chemical
Li Peng, Pengfei Gu, Peng Du, Chun Zhang, Xuehong Gu
Summary: Co-aromatization of methane and ethylene was studied using a membrane reactor packed with Zn/HZSM-5 catalyst. The DDR zeolite membrane showed high selectivity for hydrogen separation and the membrane reactor achieved high methane conversion and BTX selectivity under the optimal reaction conditions.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Liang Yu, Iliana Kyriazidou, Ming Zhou, Jonas Hedlund
Summary: This study investigates the application of DDR membranes with a thickness of approximately 700 nm in the separation of CO2 and CH4. The experimental results show that these membranes exhibit the highest CO2 permselectivity and CO2 permeability reported in literature. This is attributed to the defect-free and ultra-thin zeolite film in the membrane as well as the open and highly permeable support. The study also designs membrane processes for upgrading biogas to biomethane, which are characterized by low membrane area, methane slip, and power need.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Fumiya Hirosawa, Kyohei Watanabe, Masaya Miyagawa, Hiromitsu Takaba
Summary: The effect of the void between filler and matrix on the gas permeability of mixed matrix membrane (MMM) was investigated using non-equilibrium molecular dynamics. The results showed that controlling the void structure/affinity between the filler and the matrix could significantly improve the permeation properties of the MMM.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Review
Engineering, Environmental
Roberto Castro-Munoz, Mohd Zamidi Ahmad, Magdalena Malankowska, Joaquin Coronas
Summary: Since carbon dioxide (CO2) is the primary greenhouse gas emitted into the atmosphere due to human activities, research efforts have been focused on capturing and reducing its production. Direct air capture (DAC) using sorbents has been explored as a promising alternative, but gas separation membranes are also being considered. This paper provides a perspective on the ongoing research and attempts of DAC applications via membrane separation and introduces the main materials and types used for CO2 separation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Xuerui Wang, Tao Zhou, Ping Zhang, Wenfu Yan, Yongguo Li, Li Peng, Dylan Veerman, Mengyang Shi, Xuehong Gu, Freek Kapteijn
Summary: High-silica CHA zeolite membranes exhibit ultra-high selectivity and irradiation stability for Kr/Xe separation, surpassing state-of-the-art polymeric membranes in terms of selectivity and permeance.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Jilong Wang, Yaqi Fan, Jingang Jiang, Zheng Wan, Shuyue Pang, Yejun Guan, Hao Xu, Xiao He, Yanhang Ma, Aisheng Huang, Peng Wu
Summary: Membrane separation is an energy-efficient and environmentally friendly process that can achieve highly permeable and selective mixture separation. Two-dimensional molecular sieving membranes with unique nanopores and low transport resistance are desirable, but limited by the availability of recognized zeolite nanosheets. A newly reported swollen layered zeolite, ECNU-28, with high hydrogen selectivity offers promise for hydrogen purification and greenhouse gas capture.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Chemical
Jingyun Qian, Wenna Zhang, Xue Yang, Kexin Yan, Meikun Shen, Hongyue Pan, Hongjun Zhu, Lei Wang
Summary: Constructing a low-cost inorganic sorbent with high separation efficiency for CO2, N-2, and CH4 is challenging. In this study, alkali metal cations (Na+, K+, Rb+, Cs+) exchanged ERI zeolites were developed and used for CO2 separation. Among them, zeolite K-ERI showed a high adsorption volume (70.84 cm(3)g(-1)) and selectivity for CO2/CH4 (6254) and CO2/N-2 (2872) at 298K, surpassing reported metal cation exchanged zeolites. Experimental and theoretical analysis revealed that the metal cations effectively tailored the zeolite aperture and synergistically restrained the passage of CO2 in the ion-exchanged ERI framework. This unique host-guest interaction governed by metal cations offers a general strategy for gas separation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Tao Zhou, Mengyang Shi, Lingjie Chen, Chao Gong, Ping Zhang, Jixian Xie, Xuerui Wang, Xuehong Gu
Summary: In this study, all-silica STT zeolite membranes were prepared for capturing hydrogen from coke oven gas as a clean energy resource. The membranes exhibited high selectivity and stability, presenting a new possibility for hydrogen separation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Xiangshuai Meng, Timing Fang, Guohui Zhou, Shujin Liu, Xiaomin Liu
Summary: The influence of the intramembrane structure of SILMs on gas separation was demonstrated by molecular dynamics simulations. The five morphological characteristics of separation membranes have different separation effects. Interfacial characteristics significantly affect selectivity during the selection process, while the difference in blocking effect on CO2 is key to the separation. The distribution characteristics of ionic liquids affect the residence time and penetration of gas molecules in membranes during the permeation process.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Jiyu Cui, Zhensong Qiu, Lifeng Yang, Zhaoqiang Zhang, Xili Cui, Huabin Xing
Summary: In this study, we report a porous material, ZU-610a, which can precisely discriminate between CO2 and C2H2 through kinetic sieving. This material is able to selectively separate larger molecules of C2H2 from CO2, providing guidance for the design of adsorbents with similar kinetic diameters.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Analytical
Zishu Cao, Ninad D. Anjikar, Shaowei Yang
Summary: This article reviews the significant advancements in small-pore zeolite membranes for gas separation in recent years. It compares the separation performance of different types of zeolite membranes with respect to interested gas pairs and provides readers with an idea of membrane separation status and a quick reference on the influence of synthesis conditions on membrane quality.
Article
Nanoscience & Nanotechnology
Jiyang Wu, Haolin Wu, Bin Wang, Rongfei Zhou, Weihong Xing
Summary: This study presents the scalable fabrication of high-performance zeolite MFI membranes by single-step secondary growth on alumina monoliths. The monolithic membranes show higher packing density and mechanical strength compared to tubular ones. The separation performance of the monolithic membranes in butane isomer mixtures was evaluated and shows great potential.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Applied
Eiji Hayakawa, Shuji Himeno
MICROPOROUS AND MESOPOROUS MATERIALS
(2020)
Article
Biochemistry & Molecular Biology
Eiji Hayakawa, Shuji Himeno
Summary: The use of rapid thermal processing (RTP) successfully produced Al-containing ZSM-58 zeolite membranes with DDR topology, preventing cracks and increasing CO2/CH4 selectivity.
Article
Engineering, Chemical
Eiji Hayakawa, Hideya Nakamura, Shuji Ohsaki, Satoru Watano
Summary: This study investigates the effects of the surface morphologies of composite particles on the performance of all-solid-state lithium-ion batteries (ASS-LIBs). The surface morphologies of the composite particles changed from discrete to continuous through dry coating. The cell prepared with composite particles showed higher ionic conductivity and lower internal resistance compared to the cell prepared with a simple mixture. Cells prepared with discrete-coating particles exhibited the highest charge capability, while those prepared with continuous-coating particles showed the highest discharge capability.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Engineering, Chemical
Motoshi Iwao, Risa Sakurai, Hideya Nakamura, Eiji Hayakawa, Shuji Ohsaki, Satoru Watano
Summary: This study investigates a dry impact blending process for the fabrication of composite electrodes in all-solid-state lithium-ion batteries (ASSLIBs). By controlling the process parameters, surface-coated composite particles with high electrochemical performance were successfully synthesized. The results demonstrate the potential application of the dry impact blending process in the development of ASSLIBs.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Engineering, Chemical
Eiji Hayakawa, Hideya Nakamura, Shuji Ohsaki, Satoru Watano
Summary: This study focuses on the application of a high-shear mixer in all-solid-state lithium-ion batteries. The study finds that by adjusting the rotating speed of the mixer's chopper, uniform dispersion of solid electrolyte particles can be achieved, improving their adhesion to active material particles and resulting in electrodes with good electrical/ionic conductivity and enhanced battery performance.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Chemistry, Physical
Eiji Hayakawa, Hideya Nakamura, Shuji Ohsaki, Satoru Watano
Summary: Composite particles with conductive additives were designed for all-solid-state lithium-ion batteries (ASSLIBs) using dry-coating. The addition of conductive additives improved the cell capacity and decreased internal resistance, with acetylene black (AB) showing the best rate performance. The type of conductive additive significantly affected the rate performance, with vapor-grown carbon fiber (VGCF) not improving the rate performance due to its limited incorporation into the solid electrolyte coating layer.
JOURNAL OF POWER SOURCES
(2023)
Article
Green & Sustainable Science & Technology
Motoshi Iwao, Hiromi Miyamoto, Hideya Nakamura, Eiji Hayakawa, Shuji Ohsaki, Satoru Watano
Summary: Composite particles of sulfur and a conductive additive prepared by a hot-melt kneading process exhibit improved electrochemical performance due to the matrix-type structure of the composite particles. Additionally, the study demonstrates that the hot-melt kneading process has significantly better productivity compared to conventional compositing processes.
ADVANCED ENERGY AND SUSTAINABILITY RESEARCH
(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
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)