Article
Engineering, Chemical
Ayano Minami, Masanori Takemoto, Yasuo Yonezawa, Zhendong Liu, Yutaka Yanaba, Anand Chokkalingam, Kenta Iyoki, Tsuneji Sano, Tatsuya Okubo, Toru Wakihara
Summary: In this study, ultrafast dealumination of zeolites was achieved using a continuous-flow system, resulting in enhanced catalytic activity and thermal/hydrothermal stabilities while maintaining the original crystalline structure and particle morphology. The dealumination process completed within 1 minute at 200 degrees C significantly improved the hydrothermal stability of the zeolite.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Dimitris I. Ioannou, Luca Capaldo, Jiri Sanramat, Joost N. H. Reek, Timothy Noel
Summary: Electrophotocatalysis plays a significant role in organic synthesis and has potential for scalability. This study introduces a new concept of a flow reactor that utilizes both photons and electrons simultaneously. The device is not only applicable for electrophotocatalysis, but also for purely electrochemical and photochemical reactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Energy & Fuels
Yuxin Wu, An Chen, Xueyan Liu, Jianhong Xu, Yundong Wang, Kathryn Mumford, Geoffrey W. Stevens, Weiyang Fei
Summary: This study achieved highly efficient synthesis of propylene carbonate catalyzed by [bmim]Br via a continuous-flow microreaction system. Factors influencing the synthesis and kinetics parameters were investigated, as well as the flow patterns being determined as slug flow through transparent tube observation.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2021)
Article
Engineering, Chemical
Diogo Ferreira-Faria, Filipa Domingos-Moreira, M. Raquel Aires-Barros, Antonio Ferreira, Ana M. Azevedo
Summary: Antibodies, as one of the most important drugs in the pharmaceutical industry, face increasing demand. This study explores continuous precipitation of antibodies using an oscillatory flow reactor (OFR) as an alternative purification platform. The combination of cross-linking and volume exclusion agents was examined, and continuous precipitation in the OFR showed promising results, achieving a recovery rate of over 99% and purity of 90% for antibodies. It is also worth noting that precipitation did not alter the secondary structure of the antibodies.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
T. Ntambwe Kambuyi, B. Bejjany, B. Lekhlif, H. Mellouk, K. Digua, A. Dani
Summary: The study utilized electrocoagulation for turbidity removal from surface water in an internal loop airlift batch reactor, and designed a CFSC reactor for continuous treatment. The CFSC reactor showed more effective turbidity removal efficiency compared to the batch reactor, with lower energy consumption and better mixing capabilities.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Rebecca Hollenbach, Delphine Muller, Andre Delavault, Christoph Syldatk
Summary: This study presents a novel concept of continuous enzymatic glycolipid production catalyzed by Novozyme 435®, using a biphasic aqueous-organic system for simultaneous solubilization of sugars and fatty acids. Productivity in the continuous process was higher compared to a batch one, with space-time yields of up to 1228 ± 65 mu mol/L/h.
Article
Multidisciplinary Sciences
Arjun Kumar Pukkella, Naga Ravikumar Varma Nadimpalli, Venkataramana Runkana, Sivakumar Subramanian
Summary: Hydrothermal synthesis is an attractive method for producing nanoparticles using inexpensive materials. This study introduces a novel spiral continuous flow reactor that provides uniform reaction conditions and particle growth through rapid mixing. Simulation results show that this reactor can produce nanoparticles with a small mean diameter and a narrow size distribution.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Chemical
Takanori Tanino, Takuya Takayanagi, Masayoshi Matsui, Takayuki Ohshima
Summary: This study constructed a pulsed electric field (PEF) reactor with two flow paths separated by a membrane for sake pasteurization. The effects of different flow rates and electrical conductivity of the treatment and cooling solutions on microbial inactivation efficiency and temperature were investigated. The results showed that lower treatment solution flow rates and appropriate cooling solution electrical conductivity were crucial for effective pasteurization.
JOURNAL OF FOOD ENGINEERING
(2022)
Article
Energy & Fuels
Trinh Hao Nguyen, Dao Anh Le Nguyen, Diep Dinh Le, Phuc Cong Huynh, Thien Phuoc Nguyen, Nhat Minh Nguyen, Ha Bich Phan, Phuong Hoang Tran
Summary: This study successfully synthesized 5-hydroxymethylfurfural (5-HMF) with high yield and selectivity using ionic liquids under continuous flow. The optimal reaction condition was determined by investigating the effects of temperature, solvent, catalyst activity, catalyst loading, substrate, and large-scale synthesis. The results showed that 1-(4-sulfobutyl)3-methylimidazolium bromide in DMSO at 140 degrees C for 5 min achieved a good yield of 5-HMF, approximately 68%. This eco-friendly and time-saving approach can be applied to the large-scale production of 5-HMF from fructose.
Article
Engineering, Environmental
Tania Perez-Perez, Ileana Pereda-Reyes, Gleyce Teixeira Correia, Eloisa Pozzi, Wu Hong Kwong, Deny Oliva-Merencio, Marcelo Zaiat, Silvio Montalvo, Cesar Huilinir
Summary: The study demonstrated that an expanded granular sludge bed (EGSB) reactor using zeolite as support showed more stable performance in treating synthetic swine wastewaters. The addition of zeolite had a positive influence on granule formation, size, and bacterial and archaeal populations.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Toussaint Ntambwe Kambuyi, Zakia Zmirli, Bouchra Bejjany, Hamid Mellouk, Khalid Digua, Brahim Lekhlif, Adil Dani
Summary: This study investigates the effects of different CFSC reactor configurations on performance, finding that increasing the number of Working Up-Flow Channels can reduce electrode consumption, improve mixing time, decrease residual aluminium concentration, and enhance water treatment efficiency.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Tingting Ma, Rui Zhao, Jian Song, Xiaofei Jing, Yuyang Tian, Guangshan Zhu
Summary: Extraction of gold from e-waste is a promising method for environmental remediation, but cost-ineffective for normal usages. Direct conversion of gold from e-waste to higher value materials is advantageous. In this study, a porous aromatic framework (PAF) called iPAF-7 was synthesized and demonstrated rapid extraction of gold from e-waste. An aerogel monolith incorporating iPAF-7 was also successfully fabricated, showing potential for continuous-flow catalysis.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Environmental
Jiayou Zhang, Yiming Mo
Summary: Photoredox catalysis has gained significant attention for synthesizing fine chemicals and active pharmaceutical ingredients. However, heat management in photochemical reactors is hindered by the photon and heat generation from light sources. In this study, a strategy to decouple photon and heat using light guide plate (LGP) technology was proposed, leading to the design of a continuous light-diffusing photochemical reactor (LDPR). The LDPR effectively manages heat by distributing the photons emitted by the light source uniformly on the LGP, isolating heat generation from the reaction zone.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Biotechnology & Applied Microbiology
Nikhil Kateja, Nitika Nitika, Rahul S. Fadnis, Anurag S. Rathore
Summary: The study shows that the novel coiled flow inversion reactor is suitable for continuous virus inactivation, with comparable results to batch processing. Integration of the reactor into continuous Protein-A capture chromatography processes resulted in consistent process performance and product quality attributes in different case studies.
BIOCHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Alberto Hernandez-Aguirre, Eliseo Hernandez-Martinez, Felipe Lopez-Isunza, Carlos O. Castillo
Summary: This study introduces a novel approach to developing a pseudo-continuous model for describing the dynamics of a Newtonian fluid in an industrial-scale packed-bed reactor with a low tube to particle diameter ratio. By incorporating compressional work into the pressure drop and velocity field, the model shows promise in accurately representing the behavior of the fluid. The research opens up possibilities for extending the approach to complex pellet shapes and developing pseudo-continuous models for heat and mass transport, thus paving the way for more efficient industrial-scale packed-bed reactors.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Physics, Condensed Matter
R. Horie, K. Horigane, S. Nishiyama, M. Akimitsu, K. Kobayashi, S. Onari, T. Kambe, Y. Kubozono, J. Akimitsu
JOURNAL OF PHYSICS-CONDENSED MATTER
(2020)
Article
Materials Science, Multidisciplinary
Ritsuko Eguchi, Megumi Senda, Eri Uesugi, Hidenori Goto, Akihiko Fujiwara, Yasuhiko Imai, Shigeru Kimura, Takashi Noji, Yoji Koike, Yoshihiro Kubozono
MATERIALS RESEARCH EXPRESS
(2020)
Article
Physics, Condensed Matter
Huan Li, Yanan Wang, Xiaofan Yang, Tomoya Taguchi, Lei Zhi, Hidenori Goto, Ritsuko Eguchi, Hirofumi Ishii, Yen-Fa Liao, Yoshihiro Kubozono
JOURNAL OF PHYSICS-CONDENSED MATTER
(2020)
Article
Chemistry, Physical
Minoru Yamaji, Hideki Okamoto, Kenta Goto, Fumito Tani
Summary: Advancements in spectrophotometric apparatuses have allowed for the determination of fluorescence quantum yields and lifetimes of emissive compounds in both solution and solid state. This study found that biaryls composed of naphthyl, phenanthryl, and pyrenyl moieties exhibit solid-state photoluminescence in the visible wavelength region at room temperature. The fluorescence quantum yields of the studied biaryls in solid state were found to be higher than those of the parent chromophores in solution, with some showing solid-state emission spectra in longer wavelength regions than in solution. Crystallographic analysis results were used to discuss the relationship between crystal packing and emission features in the solid state.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Yanting Zhang, Ritsuko Eguchi, Shino Hamao, Hideki Okamoto, Hidenori Goto, Yoshihiro Kubozono
Summary: This study provides a precise evaluation of the field-effect mobility mu in organic thin-film and single-crystal FETs using a new indicator called effective field-effect mobility mu(eff). The FET performance based on mu(eff) values is discussed, showing that mu(eff) values of single-crystal FETs are consistent with previous mu values, while mu(eff) values of thin-film FETs are lower due to a high absolute threshold voltage.
Article
Chemistry, Multidisciplinary
Keito Nose, Kaito Yoshioka, Minoru Yamaji, Fumito Tani, Kenta Goto, Hideki Okamoto
Summary: Imide-fused [n]phenacenes (nPDIs, n = 3, 5, 7) were synthesized and their electronic features were investigated. nPDIs exhibited two reduction waves due to the formation of radical ions and dianions. 3PDI showed blue fluorescence independent of solvent polarity, while 5PDI and 7PDI displayed solvent-dependent fluorescence due to intramolecular charge transfer. The spectral features were analyzed using the Lippert-Mataga relationship and theoretical calculations.
Article
Chemistry, Multidisciplinary
Daiki Asanuma, Hieu Thi Minh Nguyen, Zuoyue Liu, Sachiko Tojo, Hajime Shigemitsu, Minoru Yamaji, Kiyohiko Kawai, Tadashi Mori, Toshiyuki Kida, Guillem Pratx, Mamoru Fujitsuka, Yasuko Osakada
Summary: We demonstrate a new design for nano-sized scintillators, wherein polymer dots doped with thermally activated delayed fluorescence (TADF) molecules exhibit blue radio-luminescence upon hard X-ray and electron beam irradiation.
NANOSCALE ADVANCES
(2023)
Article
Chemistry, Multidisciplinary
Zouyue Liu, Hieu Thi Minh Nguyen, Daiki Asanuma, Sachiko Tojo, Minoru Yamaji, Kiyohiko Kawai, Guillem Pratx, Mamoru Fujitsuka, Yasuko Osakada
Summary: In this study, we synthesized radioexcitable luminescent polymer dots (P-dots) doped with heteroleptic tris-cyclometalated iridium complexes that emit red, green, and blue light. We investigated the luminescence properties of these P-dots under X-ray and electron beam irradiation, revealing their potential as new organic scintillators.
Article
Chemistry, Physical
Minoru Yamaji, Sachiko Tojo, Tetsuro Majima, Mamoru Fujitsuka
Summary: The mesolytic profiles of (4-cyanophenyl)(4'-methoxyphenyl)disulfide were investigated using gamma-ray and pulsed-electron radiolysis. It was found that upon mesolysis of the radical anion, the methoxythiyl radical was formed through intramolecular electron transfer. The activation energy, frequency factor, bond dissociation energy, bond length, and charge distribution in the radical anion were determined and the substituent effects were discussed.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Yanting Zhang, Ritsuko Eguchi, Hideki Okamoto, Kenta Goto, Fumito Tani, Minoru Yamaji, Hidenori Goto, Yoshihiro Kubozono
Summary: Alkyl-phenyl[n]phenacenes with different alkyl substituents were synthesized and investigated for their application in high-performance thin-film FET devices. Among them, PhC10-PIC showed the highest field-effect mobility.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Yanting Zhang, Ritsuko Eguchi, Shino Hamao, Kenta Goto, Fumito Tani, Minoru Yamaji, Yoshihiro Kubozono, Hideki Okamoto
Summary: Dibenzo[n]phenecenes (DBnPs, n = 5-7) were conveniently synthesized through Mallory photocyclization. The effective mobilities of single-crystal field-effect transistors of DBnPs were evaluated, showing that C-2h-symmetrical DB6P performs better than C-2v-symmetrical DB5P and DB7P.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Niko Fioravanti, Luca Pierantoni, Davide Mencarelli, Claudio Turchetti, Shino Hamao, Hideki Okamoto, Hidenori Goto, Ritsuko Eguchi, Akihiko Fujiwara, Yoshihiro Kubozono
Summary: Organic field-effect transistors can be used in RFID tags and flat-panel displays. The study compared two ring oscillators using different FETs and introduced a low-voltage operation with ZrO2 as the gate dielectric material. The higher mobility in p-channel FETs compared to n-channel FETs needs to be addressed to increase oscillation frequency.
Article
Materials Science, Multidisciplinary
Ignacio Munoz Resta, Juan F. Miravet, Minoru Yamaji, Francisco Galindo
JOURNAL OF MATERIALS CHEMISTRY C
(2020)
Article
Materials Science, Multidisciplinary
Hideki Okamoto, Shino Hamao, Keiko Kozasa, Yanan Wang, Yoshihiro Kubozono, Yong-He Pan, Yu-Hsiang Yen, Germar Hoffmann, Fumito Tani, Kenta Goto
JOURNAL OF MATERIALS CHEMISTRY C
(2020)
