All issues
Volume 48 (2023)
- Issue 6 Pages 254-
- Issue 5 Pages 214-
- Issue 4 Pages 160-
- Issue 3 Pages 94-
- Issue 2 Pages 56-
- Issue 1 Pages 2-
Volume 48, Issue 3
Displaying 1-9 of 9 articles from this issue
- |<
- <
- 1
- >
- >|
Special Topic : Horizons of MOF/COF-based membrane research
-
Shunsuke Tanaka2023 Volume 48 Issue 3 Pages 94-103
Published: 2023
Released on J-STAGE: June 08, 2023
JOURNAL RESTRICTED ACCESSMetal–organic frameworks (MOF) have demonstrated great potential as promising membrane materials in the past few years. This paper reviews the recent research and development of MOF membranes for gas separation. In particular, strategies for polycrystalline membrane formation are discussed, with a focus on separation systems involving CO2. Challenges and opportunities for the industrial deployment of MOF membranes are also be discussed, providing guidance for the design and fabrication of future high–performance membranes.View full abstractDownload PDF (1489K) -
Kenji Okada, Masahide Takahashi2023 Volume 48 Issue 3 Pages 104-110
Published: 2023
Released on J-STAGE: June 08, 2023
JOURNAL RESTRICTED ACCESSMetal–organic frameworks (MOFs), also called porous coordination polymers (PCPs), are crystalline porous organic–inorganic hybrid materials consisting of metal–based nodes and organic linkers via coordination bonds. Because of their periodic frameworks as well as structural and chemical versatility, MOFs are being developed for bulk applications, such as gas storage and engineering operations (catalysis, separation). Recently, MOF–based films, and powder show tremendous potential as membranes, active sensor coatings, high–performance dielectrics, and other microelectronic applications originating from the integration of porous functional materials. This paper outlines our recent advances in the preparation of MOF films and MOF oriented thin films and applications.View full abstractDownload PDF (859K) -
Ryohei Mori2023 Volume 48 Issue 3 Pages 111-118
Published: 2023
Released on J-STAGE: June 08, 2023
JOURNAL RESTRICTED ACCESSMetal Organic Frameworks (MOFs) with large surface area and interesting structural properties have risen as a distinctive class of porous materials, which has enabled MOFs to gain attention in a wide range of applications like drug delivery, gas capture and separation, storage, catalysis and sensors. In addition, they have also emerged as efficient materials in electrochemical devices owing to their remarkable properties including fine tunable pore size regulation, functional groups and metals in MOFs etc... In this review, we will explain various examples of MOFs application as electrodes for electrochemical devices including lithium ion battery, lithium air battery, capacitor and fuel cell. Not only intact MOFs but also MOFs derived oxide, sulfide and carbonaceous materials will be presented. Moreover, since MOFs are inherently insulative, conductive composites were prepared with MOFs and MOFs derived materials and introduced as electrodes.View full abstractDownload PDF (1019K) -
Masaki Kato, Takashi Yanase, Toshihiro Shimada2023 Volume 48 Issue 3 Pages 119-125
Published: 2023
Released on J-STAGE: June 08, 2023
JOURNAL RESTRICTED ACCESSCovalent organic framework (COF) films were synthesized from the vapor phase. The films annealed at 400 ℃ had a pore network structure with a diameter of 2.9 ～ 3.5 nm. Experimental and numerical analysis show that the COF was more permeable to CO2 than N2 due to its greater affinity for CO2 compared to N2View full abstractDownload PDF (1125K) -
Shinji Kanehashi2023 Volume 48 Issue 3 Pages 126-131
Published: 2023
Released on J-STAGE: June 08, 2023
JOURNAL RESTRICTED ACCESSMixed Matrix Membranes (MMMs) have combination benefits of both polymer substrates and porous nanoparticles and have become interesting membranes for gas separation. Nanoparticles can improve not only gas separation performance but also physical properties (e.g., mechanical strength, thermal stability, and physical aging). Actual flue gas situation involves various minor components as impurity such as water vapor, inert gases, carbon dioxide, hydrocarbons, sour gases, etc. The influence of these components on the membrane performance appears as membrane swelling, plasticization, and chemical/physical aging. This paper describes development of MMMs for carbon capture and their interesting properties as gas separation membranes. The impacts of minor components in the feed gas stream on the membrane performance of MMMs are also introduced.View full abstractDownload PDF (978K) -
Paloma Ortiz–Albo, Hiromitsu Takaba, João Crespo, Luísa A. Neves, Izum ...2023 Volume 48 Issue 3 Pages 132-137
Published: 2023
Released on J-STAGE: June 08, 2023
JOURNAL RESTRICTED ACCESSMixed matrix membranes (MMMs) combine a polymeric matrix and a filler to upgrade the gas separation performance. Various new adsorbents including metal organic frameworks (MOFs) have been reported that can be used as a filler to improve the CO2 perm–selectivity of membranes. Combining ionic liquids (ILs) to the polymer– MOF matrix further improved the membrane performance. However, considering variables such as IL chemistry, degree of loading and preparation protocol, multiple combinations can be considered. Molecular simulation gives insights of the membrane structure and the transport mechanism and might be a tool to design MMMs. This work presents the effective description and assessment of these three–component membranes for CO2 separation, combining experimental data and molecular simulations.View full abstractDownload PDF (851K) -
Fumiya Hirosawa, Masaya Miyagawa, Hiromitsu Takaba2023 Volume 48 Issue 3 Pages 138-144
Published: 2023
Released on J-STAGE: June 08, 2023
JOURNAL RESTRICTED ACCESSDownload PDF (982K)
Original Contribution
-
Youhei Yabuno, Takafumi Yasui, Kenji Shiode, Koji Yamada, Kazuki Matsu ...2023 Volume 48 Issue 3 Pages 145-152
Published: 2023
Released on J-STAGE: June 08, 2023
JOURNAL FREE ACCESSCoagulation direct membrane filtration was studied for eutrophic lake water containing algae. The effects of three levels of coagulant injection (0, 5, and 30 mg/L as iron chloride (FeCl3)) on membrane filtration were studied. Laboratory–scale constant–pressure filtration experiments showed that 30 mg/L FeCl3 was the preferred filtration condition with a higher injection volume of coagulant, similar to previous studies. Conversely, the results of the pilotscale constant flow filtration experiments showed that 5 mg/L FeCl3 was the preferred filtration condition, while 30 mg/L FeCl3 resulted in reversible foulant accumulation due to poor discharge of reversible foulants from the membrane module. Consequently, a pilot–scale of coagulation direct membrane filtration was conducted, and stable operation for 37 days was achieved with 5 mg/L FeCl3. This study demonstrated that coagulation direct membrane filtration is feasible for algae–rich water on a pilot–scale.View full abstractDownload PDF (902K)
Products Spotlight
-
Yashiro Ichino2023 Volume 48 Issue 3 Pages 153-157
Published: 2023
Released on J-STAGE: June 08, 2023
JOURNAL RESTRICTED ACCESSHydrocarbon–based ion exchange membranes (IEM) are used for salt production, acid recovery from waste acid, wastewater treatment, and separation of organic matter and inorganic salts. In the conventional manufacturing process, the monomer is impregnated into the base material, but in the graft polymerization process that we have adopted a chemical bond is formed between base material and monomer, resulting in an IEM that is more flexible and easier to handle than those produced by the conventional process. Monovalent selective IEMs improve salt production efficiency. Proton selective IEMs and anion exchange membrane make two types of acid recovery processes possible. With a wide variety of IEM products and small scale testing equipment for these two processes, we are able to support our customer’s process studies.View full abstractDownload PDF (927K)
- |<
- <
- 1
- >
- >|