Article
Engineering, Chemical
Ryosuke Ezure, Yuma Arai, Daiki Nakano, Hiroyuki Komatsu, Hideo Tajima
Summary: Hydrate-based gas separation is a method of separating gas mixtures based on their thermodynamic properties. This study proposes a new process for gas absorption and desorption under constant pressure with rising temperature. Theoretical calculations and experimental verification showed that SF6 can be concentrated up to 90% using this process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Yeon-Gyu Lim, Chul-U Bak, Young-Deuk Kim
Summary: This study explores the separation characteristics of polysulfone hollow fiber membranes for removing carbon dioxide and sulfur compounds from biogas. The experiments and theoretical investigations show that the presence of sulfur compounds has a negligible effect on the separation performance of the polysulfone membrane.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Yutong Wang, Mingyue Fu, Sainan Zhou, Hongyan Liu, Xiaokang Wang, Weidong Fan, Zhanning Liu, Zhikun Wang, Dacheng Li, Hongguo Hao, Xiaoqing Lu, Songqing Hu, Daofeng Sun
Summary: This study reports a cobalt metal-organic framework, UPC-66, with a self-adaptive pore structure. The pore size of activated UPC-66-a can undergo synchronous dynamic transformation with temperature, pressure, and guest molecules. Experimental results show that UPC-66 can effectively separate polymer-grade ethylene from multicomponent mixtures.
Article
Biochemistry & Molecular Biology
Jong-Yeol Jeon, Bo-Ryoung Park, Jeong-Hoon Kim
Summary: A general finite element model and a new solution method were developed to simulate the permeances of LDG components and the performance of a polysulfone membrane separation unit. The simulation results showed that the permeances of mixed gases were different from those of pure gases, and CO2 caused plasticization of the polysulfone membrane. The new solution method enabled fast simulation of the performance of the first-stage membrane, and the developed model accurately predicted the performance of the first-stage membrane unit.
Article
Engineering, Chemical
Songi Song, Ki Chul Kim
Summary: This study investigates the structural stability and thermodynamic degradation probabilities of selected fluorocarbon compounds as alternative insulating gases. It reveals that these compounds are suitable insulation candidates under vacuum conditions, but the presence of specific impurity gases may compromise their stability.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Chemical
Yue Wu, Xiaoyu Li, Yinhui Li, Chunhui Tao, Yufeng Tang, Shanshan Wang, Yu Fu, Wuju Ma, Wenxiang Zhang, Heping Ma
Summary: The exploration of removal processes for sulfur hexafluoride (SF6) emission through adsorptive separation technology has been driven by public concerns. Using task-specific porous materials, the capture of SF6 can achieve lower energy consumption and a reduced carbon footprint. In this study, four HF resistant porous aromatic frameworks (PAF-XJTU-1 to PAF-XJTU-4) with strong C-C linkage were prepared for the separation of SF6 in semiconductor etching exhaust. Experimental results and theoretical studies confirmed the efficient capture of SF6 in PAF-XJTUs.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Thermodynamics
Xiaoya Zang, Jing Wang, Yong He, Xuebing Zhou, Deqing Liang
Summary: In this study, TBAB hydrates were synthesized and their carbon capture capacity from a ternary gas mixture of CH4/CO2/N-2 was investigated. The addition of TBAB increased the specific surface area of the hydrate crystals and transformed the hydrate structure. These findings are important for the development of hydrate gas separation technology.
Article
Biochemistry & Molecular Biology
Guoqiang Li, Wojciech Kujawski, Katarzyna Knozowska, Joanna Kujawa
Summary: CO2 separation from flue gas based on membrane technology has received significant attention in recent decades. In this study, PEI hollow fibers were fabricated using a dry-jet-wet spinning technique and then coated with a PDMS selective layer to prepare composite membranes. Various spinning conditions of the hollow fibers were characterized, and it was found that factors such as dope concentration, bore fluid flow rate, and bore fluid composition significantly influenced the gas permeance and ideal selectivity of the PDMS/PEI composite membrane.
Article
Engineering, Chemical
Xinlei Huang, Fuqiang Chen, Haoran Sun, Wei Xia, Zhiguo Zhang, Qiwei Yang, Yiwen Yang, Qilong Ren, Zongbi Bao
Summary: Microporous carbon adsorbents derived from poly(vinylidene chloride) resins via reagent-free pyrolysis show high adsorption capacity and selectivity for SF6 and CF4, exhibiting excellent separation performance. These carbon adsorbents with facile preparation process and stability hold great promise for practical separation processes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Ning Han, Wei Zhang, Wei Guo, Sijie Xie, Chi Zhang, Xuan Zhang, Jan Fransaer, Shaomin Liu
Summary: This study investigated the synthesis and properties of La0.6Sr0.4Co0.2Fe0.8O3-delta (LSCF) hollow fiber perovskite membranes with wrinkled surface, demonstrating their applicability for oxygen separation. The results showed that the wrinkled membranes had higher oxygen permeation flux after Ag deposition as the catalyst.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Shaowei Yang, Byunghyun Min, Qiang Fu, Christopher W. Jones, Sankar Nair
Summary: Viscosity-confined dry gel conversion (VCDGC) method is demonstrated for the fabrication of high-performance zeolite hollow fiber membranes. The synthesis and performance testing of small-pore CHA and medium-pore MFI membranes showcase the versatility and reliability of this method.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Biochemistry & Molecular Biology
Evgenia Dmitrieva, Evgenia Grushevenko, Daria Razlataya, George Golubev, Tatiana Rokhmanka, Tatyana Anokhina, Stepan Bazhenov
Summary: This study proposes the creation of a hollow fiber composite membrane with a selective layer of silver alginate for the first time. The approach of obtaining silver alginate is presented and its sorption and transport properties are studied. The membrane shows high selectivity for the ethylene/ethane mixture and demonstrates potential for olefin/paraffin separation.
Article
Engineering, Chemical
Do Young Kim, Seungbo Ryu, Hyoung-Juhn Kim, Hyung Chul Ham, Hyuntae Sohn, Sung Pil Yoon, Jonghee Han, Tae-Hoon Lim, Jin Young Kim, Seung Woo Lee, Chang Won Yoon, Sun Hee Choi
Summary: In this study, a hydrogen-selective membrane based on asymmetric polybenzimidazole (PBI) demonstrated high permeability and permselectivity. The addition of LiCl increased polymer chain density, solution concentration, and stability of the membrane structure.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Wen-Hsiung Lai, David K. Wang, Hui-Hsin Tseng, Ming-Yen Wey
Summary: Highly selective poly(S-IL) hollow fiber membranes were developed by synthesizing and coating a styrene-based IL monomer, achieving an increased CO2/N-2 selectivity of 29 and a final CO2 permeance of 3.6 GPU through optimization of polymerization conditions. Testing at higher temperatures led to increased gas permeance and selectivity, with a peak CO2/N-2 selectivity of 35 at 50 degrees C.
JOURNAL OF CO2 UTILIZATION
(2022)
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, Chemical
Ju Yeon Lee, Hongjin Park, Jong Suk Lee, Sungho Yoon, Jung-Hyun Lee
JOURNAL OF MEMBRANE SCIENCE
(2020)
Article
Engineering, Chemical
Ju Ho Shin, Hyun Jung Yu, Junhyung Park, Albert S. Lee, Seung Sang Hwang, Seok-Jhin Kim, Sunghwan Park, Kie Yong Cho, Wangyun Won, Jong Suk Lee
JOURNAL OF MEMBRANE SCIENCE
(2020)
Article
Engineering, Chemical
Wansuk Choi, Changhoon Lee, Cheol Hun Yoo, Min Gyu Shin, Gi Wook Lee, Taek-Seung Kim, Hyun Wook Jung, Jong Suk Lee, Jung-Hyun Lee
JOURNAL OF MEMBRANE SCIENCE
(2020)
Article
Engineering, Chemical
Jin Woo Oh, Kie Yong Cho, Ming-Yang Kan, Hyun Jung Yu, Dun-Yen Kang, Jong Suk Lee
JOURNAL OF MEMBRANE SCIENCE
(2020)
Article
Chemistry, Multidisciplinary
Da-Shiuan Chiou, Hyun Jung Yu, Ting-Hsiang Hung, Qiang Lyu, Chung-Kai Chang, Jong Suk Lee, Li-Chiang Lin, Dun-Yen Kang
Summary: This paper presents a dense CAU-10-H MOF membrane with exceptional CO2 selectivity and permeability, making it suitable for industrial applications. State-of-the-art atomistic simulations provide valuable insights into the outstanding separation performance of the membrane at the molecular level. Adsorbent-adsorbate Coulombic interactions are identified as a crucial factor in the design of CO2-selective MOF membranes.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Heegon Kim, Yeseul Choi, Soonjae Lee, Ki-Bong Lee, Kyung-Won Jung, Jae-Woo Choi
Summary: Dissolved organic matter and scaling are major causes of electrode fouling in CDI, but limited information exists on fouling by low molecular weight organic matter. This study investigated a pretreatment process to prevent organic and inorganic matter accumulation and scaling in CDI, finding activated filter media and granule activated carbon to be promising for drinking water treatment. Higher turbidity and organic matter concentration in CDI feed solution lead to greater reductions in salt removal efficiency, production rate, and energy consumption, while divalent ions like Ca2+ have no noticeable effect on CDI treatment performance but iron has a noticeable effect on CDI electrode fouling.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Engineering, Environmental
Kyung-Won Jung, Seon Yong Lee, Jae-Woo Choi, Min-Jin Hwang, Wang Geun Shim
Summary: The Mg-Al LDHs-FHC composite was synthesized for efficient arsenate and phosphate removal from water. By adjusting the Mg:Al molar ratios and hydrothermal temperatures, the composite showed high removal efficiency for phosphate and arsenate in single-component and binary-component systems, respectively. Spectroscopic analyses indicated that competitive adsorption behavior was influenced by the physicochemical characteristics of arsenate and phosphate.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Environmental Sciences
Hien Thi Nguyen, Youngjae Kim, Jae-Woo Choi, Seongpil Jeong, Kyungjin Cho
Summary: The study evaluated the long-term organic removal performance and microbial community shift in simulated aquifer storage and recovery (ASR) conditions. The results suggest that applying natural bioattenuation using indigenous soil microbial communities can be a promising option as an organic carbon management strategy in ASR systems. Over time, both the organic removal performance and microbial community structure showed significant changes during long-term operation.
ENVIRONMENTAL RESEARCH
(2021)
Article
Green & Sustainable Science & Technology
Taeho Bong, Jin-Kyu Kang, Viviane Yargeau, Hye-Lim Nam, Sang-Hyup Lee, Jae-Woo Choi, Song-Bae Kim, Jeong-Ann Park
Summary: By comparing the adsorption capacities of different carbon materials for geosmin and 2-methylisoborneol, it was found that powdered activated carbon C-PAC had the highest maximum adsorption capacity in both distilled water and river water. Multiple linear regression (MLR) and deep neural network (DNN) models were effective in predicting the removal efficiency of C-PAC for GSM and MIB.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Hee-Gon Kim, Keunsu Choi, Kibong Lee, Soonjae Lee, Kyung-Won Jung, Jae-Woo Choi
Summary: The research found that the maximum adsorption capacities of UiO-66 and UIO-66-NH2 were 93.6 and 76.5 mg/g, respectively, with the TC adsorption capacity of UiO-66-NH2 being lower than that of UiO-66. Density functional theory calculations revealed that the -NH2 functional group could weaken the structural robustness of UiO-66-NH2, causing a reduction in TC adsorption capacity.
Article
Environmental Sciences
Sang-Gil Lee, Soonjae Lee, Jae-Woo Choi
Summary: This study conducted a two-dimensional transport experiment with organic contaminants in saturated sand, finding the Langmuir model to be the most appropriate for describing toluene sorption in the two-dimensional transport system. The results demonstrate that two-dimensional experiments are more effective in identifying adsorption characteristics in saturated aquifers compared to one-dimensional column experiments.
Article
Chemistry, Physical
Keunsu Choi, Seon Yong Lee, Heegon Kim, Ki Bong Lee, Jae-Woo Choi, Kyung-Won Jung
Summary: The novel hierarchical corolla-like MnO2-decorated porous magnetic biochar composite (c-PMB/MnO2) demonstrated competitive adsorption behavior for the removal of As(V) and Cr(VI) from aqueous solutions. XPS analysis revealed the contributions of all components to As(V) and Cr(VI) adsorption, as well as the selective reduction of Cr(VI) to Cr(III).
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Environmental
Youngkyun Jung, Taegu Do, Ung Su Choi, Kyung-Won Jung, Jae-Woo Choi
Summary: This study successfully achieved the highly selective and efficient recovery of gold from electronic waste using a novel cage-like amine-rich polymeric capsule (APC). The APC structure allowed the gold ions to penetrate and be reduced to nanocrystals, while also preventing the release of these nanocrystals and clogging of the pore channels. The APC adsorbent achieved a gold recovery ratio of ~99%.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Biochemistry & Molecular Biology
Prem P. Sharma, Rahul Singh, Syed Abdullah Shah, Cheol Hun Yoo, Albert S. Lee, Daejoong Kim, Jeong-Geol Na, Jong Suk Lee
Summary: In this study, a nano-composite material for reverse electrodialysis (RED) was reported, which improved ion conduction by rearranging the polymer structure, resulting in enhanced efficiency of the nanomembrane.
Article
Engineering, Chemical
Marleane Rovi Ramos Ferrer, Jin-Kyu Kang, Jae-Woo Choi, Chang-Gu Lee, Seong-Jik Park
Summary: Surface-modified activated carbon (AC) using HCl or NH4OH enhanced its adsorption capacity for Cr(VI) removal. 20H-AC showed a maximum adsorption capacity of 177.9 mg/g for Cr(VI), indicating effective removal efficiency. Thermodynamic study revealed an endothermic and spontaneous reaction for Cr(VI) adsorption onto 20H-AC.
DESALINATION AND WATER TREATMENT
(2021)
Article
Engineering, Chemical
Jiawei Hou, Shixuan Guo, Nigel Graham, Wenzheng Yu, Kening Sun, Ting Liu
Summary: A novel 2D composite membrane based on r-HGO and MXene materials was developed, demonstrating exceptional performance for water treatment in terms of permeability, pollutant rejection, and physical stability. The optimization of preparation conditions and material proportions can result in high water flux and efficient removal of pollutants.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Retraction
Engineering, Chemical
Chang Liu, Jinghong Liu, Liang Zhu, Shanfu Tang, Huixin Xiong
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Rui Gao, Caihong Liu, Andreia F. Faria, Qiang He, Chun Yang, Jun Ma
Summary: A novel copolymer architecture has been developed to address biofouling concerns in thin-film composite (TFC) membranes by integrating anti-fouling, bactericidal, and fouling-release functions. The multifunctional membrane demonstrates promising anti-adhesive properties, self-cleaning ability, and high flux recovery rate.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Alexander T. Bridge, Noah P. Wamble, Matthew S. Santoso, Joan F. Brennecke, Benny D. Freeman
Summary: This study demonstrates the reproducible preparation of high-flux defect-free asymmetric gas separation membranes using Cyrene(TM) as a majority dope formulation component. By adjusting the volume ratios of Cyrene(TM) and THF, as well as the concentrations of Matrimid(R) and the dry step time, optimal membrane performance is achieved.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Alessandra Imbrogno, Han Ya Lin, Babak Minofar, Andrea Iris Schaefer
Summary: In this study, a composite nanofiber membrane containing cross-linked beta-cyclodextrin-epichlorohydrin was prepared and evaluated for the removal of steroid hormones. The results showed that the membrane had high adsorption capacity and the ability to form a specific inclusion complex interaction with the hormones, indicating its potential application in hormone removal.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Bora Shin, Jaewon Shin, Yanuar Chandra Wirasembada, Ki Young Park, Jinwoo Cho
Summary: This study develops a mathematical model to estimate the initial flux of volatile fatty acids in the direct contact membrane distillation process. It identifies the parameters affecting the flux and their relationship with pH.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yi-Jui Yeh, Jr Rong Liou, Wei Lin, Kuo-Lun Tung, Wei-Hung Chiang
Summary: This study demonstrates an effective plasma engineering method to create nitrogen-doped graphene quantum dot (NGQD)-inorganic nanocomposites for tunable molecular separation. The composite materials show high separation efficiency and controllable nanopore structures, making them potentially valuable for various applications.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Horacio Lopez-Marques, Kristofer L. Gleason, Manuel Aguilar-Vega, Rita Sulub-Sulub, J. Ehren Eichler, Hyeonji Oh, C. Buddie Mullins, Benny D. Freeman, Manish Kumar
Summary: In this study, water transport properties in Carbon Molecular Sieve (CMS) membranes were investigated. It was found that membranes synthesized at different pyrolysis temperatures exhibited varying water permeabilities. Compared to other polymeric materials, CMS membranes showed high water permeability, indicating potential for dehydration applications.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Dmitry A. Alentiev, Roman Yu. Nikiforov, Marina A. Rudakova, Danil P. Zarezin, Maxim A. Topchiy, Andrey F. Asachenko, Nikolay A. Belov, Maxim Bermeshev
Summary: A series of new norbornene-type monomers containing linear and branched substituents were synthesized, and robust thin membranes were prepared by vinyl-addition polymerization. Gas separation performance for the synthesized polymers was evaluated, and the structure of substituent side chains was found to significantly affect gas permeability and CO2 facilitated transport.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Lei Yan, Qi Zhang, Ze Zhang, Gui-Jie Li, Yi Jin, Xin-Lin Zhang, Yan-Yun Sun
Summary: In this study, a continuous, stable and fast ion transport channel was established through in-situ guided cross-linking of zinc alginate hydrogels on a porous membrane, overcoming the negative pore effect and effectively inhibiting the dendrite growth of zinc anodes and interfacial side reactions.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yuqing Zhang, Ailing Zhang, Huiyang He, Yuting Fan, Yongjiang Li, Song Wang, Sanxi Li
Summary: The Langmuir-Blodgett self-assembly process is used to create an ordered SPEEK membrane, which enhances the proton conductivity by three times compared to conventional solution casting method.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Hasan Ismaeel, David Gibson, Eleonora Ricci, Maria Grazia De Angelis
Summary: In this study, a machine learning-based group contribution method (ML-GC) was developed to predict pure polymer parameters and successfully applied to predict gas solubility and gas solubility isotherms in glassy polymeric membranes. The model showed satisfactory performance on a small dataset, but has the potential to provide more accurate predictions for a wider range of polymers as more data becomes available.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yi Ji, Yu Sun, Huilin Li, Qiang Fu, Yan Zhang
Summary: Previous studies have shown that vibration- or rotation-based techniques can effectively mitigate fouling during membrane filtration. However, it is difficult to incorporate these techniques with spiral wound modules (SWMs) widely used in water and wastewater treatment. This study developed a prototype membrane system to accommodate angular vibrations with a modified SWM, and experimental results showed that applying angular vibrations can effectively control algal fouling in an SWM with lower energy consumption compared to traditional methods.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Lakshmeesha Upadhayaya, Abaynesh Yihdego Gebreyohannes, Muhammad Wakil Shahzad, Usman T. Syed, Sandra L. Aristizabal, Radoslaw Gorecki, Suzana P. Nunes
Summary: Increasing temperatures worldwide pose a significant health risk, exacerbated by high humidity. Conventional air conditioners contribute heavily to carbon dioxide emissions, with dehumidification being a major factor. Membrane-based dehumidification system offers energy efficiency and non-toxic water vapor removal. This study demonstrates a membrane dehumidification system with polymeric hollow fibers coated with a green polyphenol coating, showing remarkable water vapor transport rate and selectivity. Long-term testing reveals minimal decline in vapor transport and a 4-5 times higher coefficient of performance (COP) compared to conventional dehumidifiers, making it a highly competitive, energy-saving device with reduced emissions and a smaller footprint.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Zhengzhong Zhou, Xue Zhu, Yi Yuan, Shaoqiang Wang, Xiaoshan Meng, Taoli Huhe, Qian Wang
Summary: In this study, lignin, a biomass material, was chemically modified and utilized in the interfacial polymerization process to improve the performance of nanofiltration membranes. The modified membranes showed enhanced hydrophilicity and anti-fouling properties, and the optimization of membrane pore size increased permeability. The study also demonstrated the potential application of the membranes in biogas slurry valorization.
JOURNAL OF MEMBRANE SCIENCE
(2024)
