A5067816611- Innovative Microfluidic and Catalytic Techniques Innovation
- Microfluidic and Capillary Electrophoresis Applications
- Catalytic Processes in Materials Science
- Subcritical and Supercritical Water Processes
- Catalysis and Oxidation Reactions
- Fluid Dynamics and Mixing
- Electrohydrodynamics and Fluid Dynamics
- Microfluidic and Bio-sensing Technologies
- Nanomaterials for catalytic reactions
- Petroleum Processing and Analysis
- Catalysts for Methane Reforming
- Electrowetting and Microfluidic Technologies
- Mesoporous Materials and Catalysis
- Analytical Chemistry and Chromatography
- Copper-based nanomaterials and applications
- Heat Transfer and Optimization
- Metallurgical Processes and Thermodynamics
- Minerals Flotation and Separation Techniques
- Chemical Reaction Mechanisms
- Heat and Mass Transfer in Porous Media
- AI in cancer detection
- Brain Tumor Detection and Classification
- Iron and Steelmaking Processes
- Nuclear materials and radiation effects
- Enhanced Oil Recovery Techniques
Tohoku University
2012-2023
Nihon Unisys (Japan)
2021
Institute for Materials Research, Tohoku University
2014-2017
Kyoto University
1992-2011
Kyoto Katsura Hospital
2006-2011
Chubu Electric Power (Japan)
2002
Friedel−Crafts reactions of aromatic and heteroaromatic compounds with an N-acyliminium ion pool were studied. The reaction 1,3,5-trimethylbenzene in a batch reactor gave rise to the selective formation monoalkylation product (69%). Presumably, second alkylation is slower than first because protonation that decreases its reactivity. 1,3,5-trimethoxybenzene, however, both (37%) dialkylation (32%) products. Disguised chemical selectivity due faster mixing seems be responsible for lack...
Catalytic cracking of Canadian oil sand bitumen in supercritical water was performed to clarify the effect CeO2 nanoparticles. The at 723 K promote a redox reaction between water, bitumen, and catalyst for production hydrogen oxygen. As catalyst, with two different morphologies employed because organics is expected its activity can be controlled by structure. In this study, roles were considered as well. Water attractive high potential medium low dielectric constant density near critical...
Abstract Since the early 1990s, Adschiri and his colleagues have performed research on use of supercritical water in diverse applications, including heavy oil reforming, waste polymer decomposition chemical raw materials recovery, cellulose hydrolysis sugar lignin nanoparticle synthesis. Regarding inorganic synthesis, they invented hydrothermal synthesis for continuous flow metal oxide nanoparticles, which has already found worldwide industrial applications. They proposed a two-fluid mixing...
Abstract A new type of micromixer for rapid mixing was developed based on by both kinetic energy and molecular diffusion fluids. The realized the collision micro segments, which were divided into several streams in radial, at center mixer. excellent performance confirmed examining Villermaux/Dushman reaction precipitation polymer particles phase separation. From these results, it clarified that driven breaking segments under a high shear rate instant between segments. In addition, mixer had...
An efficient production of pyruvate by the oxidative dehydrogenation lactate is achieved using a micro flow system based on gas−liquid slug flow. In this system, oxidizing agents and acetonitrile solutions lactates vanadium species are used, converted into corresponding pyruvate. For reasons atom economy enhanced mass transfer oxygen liquid phase, due to internal circulation within slugs, molecular preferred agent. catalyst screening, oxytrichloride (VOCl3) gave highest yield. A continuous...
To increase the maximum flow rate that enables slug formation in miniaturized channels, gas-phase slugs are added a liquid−liquid to form gas−liquid−liquid flow. Effects of channel size, void fraction (ratio volumetric gas phase total rate), and volume ratio aqueous organic on regime examined. Results indicate liquid-phase forms stable increases up 200 mL/min with air addition (void > 0.1) poly(tetrafluoroethylene) (PTFE) tube (inner diameter (i.d.), 3 mm). The mass-transfer was also high...
A series of gadolinium hydroxide [Gd(OH)3] nanoclusters having different morphologies was synthesized in the presence 3,4-dihydroxy hydrocinnamic acid (DHCA), an organic modifier, under subcritical water conditions. These well-shaped Gd(OH)3 clusters are composed many nanorods a parallel orientation, rather than disordered aggregation nanorods, which linked together by DHCA molecules. Here works as inter-linker to form these cluster-like structures through coordination bonds. All samples...
In this work, the solvent effect on synthesis of CeO2 nanocrystals synthesized in near- and supercritical alcohols is discussed. The materials prepared displayed a unique morphology small (<10 nm) aggregated into larger nanospheres (∼100-200 nm). such syntheses, alcohol molecules directly interact with nanocrystal surface through alkoxide carboxylate bondings. grafting density was quantified from weight loss measured using thermogravimetric analysis. A direct correlation between chain length...
This paper describes a supercritical hydrothermal synthesis method as green solvent process, along with products based on this that can be used materials contribute to solving environmental problems. The first part of summarizes the basics method, including mechanism reactions, specific features state for nanoparticle synthesis, continuous flow-type reactor and applications; provides better understanding suitability synthesize materials. second Cr-doped CeO(2) nanoparticles, which show an...
Abstract In microreactors, reactant fluids are split into many fluid segments and then fed the reactors to shorten mixing time. Two dimensionless numbers introduced represent effects of geometric design factors segments, such as shapes arrangements, on reactor performance, namely rate product yield selectivity: ratio reaction diffusion aspect mean length in two‐dimensional (2‐D) directions cross section. Methods determine these also proposed. To examine validity estimating we compare yields...