Keigo Matsuda

Keigo Matsuda
Yamagata University | YU · Department of Chemistry and Chemical Engineering

PhD

About

74
Publications
9,847
Reads
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488
Citations
Citations since 2016
28 Research Items
192 Citations
20162017201820192020202120220102030
20162017201820192020202120220102030
20162017201820192020202120220102030
20162017201820192020202120220102030

Publications

Publications (74)
Article
A gas–liquid–solid three‐phase reaction was conducted in a Taylor flow reactor to improve the apparent reaction rate by enhancing the mass transfer rate of the gas component to the surface of the solid catalyst through the liquid. Hydrogenation of α‐methyl styrene (AMS) was the model reaction. The reactor was an aluminum tube with a length of 300 m...
Chapter
A multi-stage CO2 capture process using Mixed Matrix Membrane (MMM) could separate molecules with similar molecular diameter such as CO2 and N2 by dissolution and diffusion. The required energy and the membrane area were investigated based on the membrane performance such as CO2 permeance and CO2/N2 selectivity. In this multi-stage CO2 capture proc...
Chapter
In order to enhance the versatility, we proposed a design method in which a micro ORC of 10 kW class. The micro ORC is small scale power generation system for using renewable thermal energy such as hot springs. However, such thermal energy is of very low grade and involves temperature variations, so it is necessary to develop a versatile small powe...
Article
A model-based approach was employed to examine the applicability of a micro-Kalina cycle of up to 20 kW (about 373 K) with a working fluid of ammonia/water for low-grade geothermal heat energy. It was found possible to generate 15–24 kW using hot springs (353–393 K, 10,000 kg/h). It was also found that the micro-Kalina cycle shows a temperature gli...
Article
In this study, the micro Kalina cycle (Micro KC) was designed as 10 kW class power generation system to utilize the low grade thermal heat sources (hot spring) at a temperature of 373 K with applying characteristic of the Lorenz cycle. The utilization of low grade geothermal energy which is not currently the focus of attention, is important as an e...
Article
Small temperature difference power generation technology using a combined heat pump cycle and a Kalina cycle is predicted to reduce greenhouse gas emissions and the use of fossil fuels. It has been reported that an absorption heat pump cycle can be used as a chiller unit in the Kalina cycle to improve thermal efficiency and create an efficient coge...
Article
Full-text available
The microwave-assisted heating reaction of N-acetyl glucosamine (GlcNAc) in sulfolane is described. The reaction produces two major products that are assignable to 1,6-anhydro-2-acetamido-2-deoxy-β-d-glucopyranose (AGPNAc) and 1,6-anhydro-2-acetamido-2-deoxy-β-d-glucofuranose (AGFNAc). In order to reveal a general feature of the system, the 3, 5, a...
Article
With the goal of developing a method for utilizing reactive nitrogen species emitted from combustion processes as raw materials for the synthesis of useful compounds, we investigated the selective conversion of NOx to NH3 by means of the NO–CO–H2O reaction over Pt/TiO2 catalysts. High NH3 selectivity was obtained for high-specific-surface-area cata...
Article
The catalytic toluene hydrogenation over Ni/SiO2 was carried out using H2 or a H2/H2O mixture. The toluene conversion and MCH selectivity were evaluated under partial steam pressures 0−10 kPa, at H2/toluene molar ratios 1–5, and at temperatures 393−453 K. In the absence of steam, toluene conversion increased with increasing H2 partial pressure, and...
Article
Batch distillation is a useful separation technique for obtaining a pure product from a multi-component mixture. However, it is less energy-efficient than continuous distillation. This paper describes the system we developed for an internally heat-integrated batch distillation column (Batch or Semi-batch HIDiC) to minimize the energy consumption of...
Article
A modified Petlyuk process with a reboiler at the bottom of the prefractionator eliminates the need for a vapor interconnection between the main column and the prefractionator and thus improves operability. However, the effect of this configuration on the operability has not been clarified. The present study examined the operability of a modified P...
Article
Toluene hydrogenation reaction for methylcyclohexane (MCH) synthesis via Pt-loaded Al2O3 and TiO2 (Pt/Al2O3 and Pt/TiO2) catalysts were investigated in a fixed bed reactor at 398-473 K and ambient pressure. Partial pressures of toluene, hydrogen and MCH were 60 to 91, 9 to 23, and 9 to 17 kPa, respectively. Pt-loaded catalysts showed higher activit...
Article
Membrane separation and/or membrane–distillation hybrid process has attracted attention in industry because of their strong impact on energy savings in chemical processes. Compared to conventional distillation columns, these processes have the advantage of reducing operation and capital costs, however a few work has been done to conducted the econo...
Article
Full-text available
Our previous study reported that operation in multiple steady states contributes to an improvement in reaction conversion, making it possible to reduce the energy consumption of the reactive distillation process for tert-amyl methyl ether (TAME) synthesis. This study clarified the factors responsible for an improvement in the reaction conversion fo...
Article
Process data of a commercial-scale batch distillation column for separation of a ternary mixture of 2-propanol/water/n-hexane was analyzed, and a simulation model capable of predicting dynamic conditions was developed. The developed model was applied to batch distillation in a commercial plant, and the operation performances were studied. By adjust...
Article
Phytosterols can be recovered from natural resources using molecular distillation, cold crystallization, which require large energy consumption. Adsorption was considered as a feasible alternative method. In this study, kinetics, isotherm and thermodynamics of stigmasterol adsorption on styrene-divinylbenzene with two different functional groups, s...
Article
Heat-pump-assisted distillation columns such as the vapor recompression column (VRC), self-heat recuperation column (SHRC), and heat integration column (HIDiC) have attracted attention in industry because of their strong impact on energy savings in chemical processes. Compared to conventional distillation columns, these systems have the advantage o...
Article
Full-text available
Macrocyclic polymers present an important class of macromolecules, displaying the reduced radius of gyration or impossibility to entangle. A rare approach for their synthesis is the ring expansion-controlled radical "vinyl" polymerization, starting from a cyclic alkoxyamine. We here describe ring-expansion radical crossover reactions of cyclic alko...
Article
We have previously reported the existence of steady-state solutions where reaction conversion is improved within multiple steady states, which appear in the reactive distillation column for tert-amyl methyl ether (TAME) synthesis. In the present study, we examined the energy-saving performance of a reactive distillation process that comprises a rea...
Article
Full-text available
Herein, we report that -MnO2 thin films wet-chemically deposited on electro-conductive substrates exhibited good sensing abilities toward hydrogen peroxide and glucose without the assistance of immobilized enzymes, as well as the excellent supercapacitic performance described in our previous paper. High-sensitivity values of 380mA/(M·cm²) (H2O2) an...
Article
Hybridized microparticles composed of mesoporous manganese dioxide (MPMO) core and fullerene C60 nanocrystal (NCs) shell were fabricated by co-reprecipitation method. Double layer capacitance as well as fast surface redox reaction of MPMO contributes to increase the energy density, whereas C60 NCs contributes to the reduction of IR loss to enhance...
Article
Pressure-driven membrane filtration processes such as microfiltration and ultrafiltration are still hindered by concentration polarization and membrane fouling. Generally in these filtration processes, concentration polarization causes decline of permeate flux and rejection, and fouling leads to permeate flux decline with the increase of rejection....
Article
Full-text available
Porous titania (TiO2) particles were prepared using a sol–gel technique employing Alkylketene Dimers (AKD) as a template. The effects of incremental additions of AKD as a template material on crystal structure, surface and internal morphology, and pore properties were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), t...
Article
Full-text available
In order to intensify a phase transfer catalytic reactor with the third liquid phase, it is necessary to optimize multiple operation variables that are concerned with the mass transfer rate. In the present paper, we propose a systems approach by application of a rate based model for mass transfer between two phases. Application of the developed rat...
Article
Full-text available
In this study, γ- and δ-MnO2 thin films were deposited onto F-doped tin oxide glass substrates via a chemical bath deposition technique in which manganese (II) ions were oxidized by bromate ion in a homogeneous solution. The addition of cetyltrimethylammonium chlorate to the starting solutions resulted in the deposition of the δ-phase. The thin fil...
Chapter
Geothermal heat is a huge amount of thermal energy obtained from the inside of the earth and emits a small amount of greenhouse effect gas (GHG) when used as energy. In addition, unlike other natural energies such as solar or wind, geothermal power is not affected by weather. Therefore, it is put to a variety of applications from power generation t...
Article
A model for an internally heat integrated reactive distillation process without a compressor was developed, and the synthesis of methyl acetate from methanol and acetic acid was simulated. The applicability was evaluated by using the process simulator Aspen Plus. The steady state simulation showed that the energy consumption of the heat integrated...
Article
Full-text available
A simulator for internally heat integrated distillation columns (HIDiC) with a rate-based model was developed. Using a mass transfer correlation for structured packings and the Chilton-Colburn analogy, heat transfer coefficients for the liquid phase were obtained. Based on the simulation results, the overall heat transfer coefficient U for the inte...
Article
A purpose of this chapter is to investigate application methods for a niche GA to design of Reactive Distillation (RD) process involving the production and separation of ethyl acetate. First, optimization system based on the Multi- Niche Crowding – Genetic Algorithm (MNC-GA) is demonstrated to be effective in searching preferable designs of RD proc...
Article
The effects of operating conditions such as reflux ratio and reboiler duty on the product composition and reaction performance were discussed based on a simulation model of reactive distillation with multiple steady states (MSS). Te region of MSS, determined by bifurcation analysis, was found to shift toward higher reboiler duty along with increase...
Article
Process dynamics of reactive distillation with multiple steady states (MSS) was investigated to provide a novel oper-ation procedure. Te existence of MSS was first clarified using a simulation model with bifurcation analysis. Dynamic simulations under MSS conditions were next performed and showed that the MSS had both stable and unstable solu-tions...
Article
In the present study, we investigate a framework for the application of genetic algorithm (GA) methods to reactive distillation (RD) process design. First, a computational method for hybrid simulation is proposed by linking a commercial process simulator with an in-house GA-based optimizer in order to accelerate the search for process designs showi...
Article
A simulation technique has been developed to calculate HIDiC models. A process simulator "gPROMS" for prediction of separation performance of the HIDiC with structured packing is developed by rate-based model using Maxwell-Stefan equations. Comparison of observed data from bench-scale (benzene-toluene system) separation concentric HIDiC plant, in w...
Article
A honeycomb-type nickel-based catalyst was prepared by a combination technique consisting of a sol-gel method and an electroless plating method on a stainless steel substrate. The catalyst layer formed onto the fin substrate consisted of an alumina layer and a nickel component. The alumina layer was porous and was about 7 mu m in thickness, and the...
Article
Core crosslinked star (CCS)-polymers with water-soluble arms composed of poly(N-hydroxyethylacrylamide) (PHEAA) are described. N-Hydroxyethylacrylamide was polymerized by the atom transfer radical polymerization consisting of ethyl 2-chloropropionate, copper(I) chloride (CuCl), and tris[2-(dimethylamino)ethyl]amine in an ethanol/water mixed solvent...
Article
Internally heat integrated distillation columns (HIDiCs) have attracted industrial attention since HIDiCs are expected to have a strong impact on energy savings in chemical industries. Particularly in Japan, large national research projects for HIDiCs have been conducted, and a HIDiC pilot plant has been constructed. The pilot HIDiC has shown energ...
Conference Paper
A model for an internally heat-integrated batch distillation column (Batch or Semi-batch HIDiC) was developed, and the separation of a benzene-toluene binary mixture was simulated. The applicability of the model was examined by using the commercial process simulator Aspen Plus Dynamics® to evaluate energy-saving performance and process time against...
Article
In this paper, the controllability of reactive distillation (RD) on the multiple steady states (MSS) was analysed. We used the RD column for tert-amyl methyl ether (TAME) synthesis for a case study. The model was prepared five PI controllers which control liquid level, feed flow rate, pressure of column overhead and bottom product composition. Init...
Article
This paper addresses the addition of internal heat integration to the pressure-swing distillation (PSD) process used in the separation of binary pressure-sensitive azeotropes. The primary step in the process design is to determine the pressure elevation from the low- to high-pressure distillation columns, followed by the design of internal heat int...
Article
Manganese oxide nanoparticles can be obtained simply by mixing surfactant/water/oil ternary systems containing dialkyldimethylammonium chloride, manganese(II) nitrate hexahydrate, and n-hexane. This finding is valuable in the design of a one-pot synthesis of nanoparticles from microemulsion systems.
Article
We have developed a simple scheme for preparation of silver nanoparticle film. This scheme includes the reaction between octanethiol in the toluene and silver ion in water at toluene water interface. The electric conductive films would be produced by sintering the coated films of the prepared silver nanoparticles below 200 degrees C.
Article
A model for an internally heat-integrated batch distillation column (Batch or Semi-batch HIDiC) was developed, and the separation of a benzene-toluene binary mixture was simulated. The applicability of the model was examined by using the commercial process simulator Aspen Plus Dynamics® to evaluate energy-saving performance and process time against...
Article
We investigated the molecular arrangement and surface morphology of organized molecular films of the 3-arm comb polymer containing metal ion us surface pressure-area (π-A) isotherm, inductively-coupled plasma mass spectrometry (ICP-MS), in-plane and out-of plane X-ray diffraction (XRD), and atomic force microscopy (AFM). From the result of WAXD mea...
Article
The present work proposes a method for process intensification of the reaction-separation process. A model of the reactive distillation (RD) system involving a prereactor was developed by use of an equilibrium stage model, and the reaction-separation of a multicomponent mixture was simulated by use of a simulator that was capable of predicting stea...
Article
The present work discusses a method for process intensification of the distillation process of separation. A model of an internally heat-integrated distillation column (HIDiC) of concentric type was developed using a rate-based model, and the separation of a binary mixture was simulated in a simulator which is capable of predicting steady-state con...
Article
Continuous preparation of Mn-doped ZnS nanocrystals, which exhibit photoluminescence properties, by the hot-soap method was conducted in a thin tube flow reactor. The hot-soap method is a reactive crystallization from organometallic reagents dissolved in hot surfactant (tri-n-octylphosphine oxide : TOPO). While rapid mixing is generally essential f...
Article
Full-text available
This paper reports the analysis of the energy saving for design of an internally heat integrated distillation column (HIDiC) conducted in the second-phase of Japanese national research project for energy conservation in multicomponent petroleum distillation. The practical commercial scale distillation column separating cyclopentane from a multicomp...
Article
Optimum operation, energy saving, carbon-dioxide emission and cost estimation of a pilot plant of an internally heat-integrated distillation column (HIDiC) separating a twelve-component hydrocarbon mixture to obtain residue-product of crude cyclopentane were studied. From the operation results of the HIDiC at zero external reflux and reboiler free...
Conference Paper
Our honoree Professor Dr. Shuzo Ohe was the chairman of the evaluation committee of the Japanese NEDO HIDiC project conducted in 2002-2006. Not only he gave us a lot of suggestion on our project, but also he has introduced our HIDiC technology in AIChE meetings. He has presented the application of the HIDiC technology for the separation of azeotrop...
Article
Internally heat-integrated distillation columns (HIDiCs) are one of the most attractive alternatives for the conventional distillation columns (CDiCs) since HIDiCs have very high potential to separate a mixture with smaller energy consumption compared to CDiCs. In order to prove the energy saving characteristics of HIDiCs, a pilot plant of the HIDi...
Article
To analyze the effect of the maldistribution of vapor and liquid flows among tube units of an internally heat-integrated distillation column (HIDiC) on its separation performance, a simulator was developed with all equilibrium stage model. The simulation study indicated that the maldistribution of vapor and liquid flows among, tube units would infl...
Article
The present work discusses a method for process intensification of the distillation process of separation. A model of an internally heat-integrated distillation column (HIDiC) with concentric and compact heat exchanger types was developed using a rate-based model and the separation of multicomponent mixture was simulated in a simulator which is cap...
Article
Operation and energy savings in the separation of a twelve-cornponent hydrocarbon mixture by the pilot plant of an internally heat-integrated distillation column (HIDiC) were studied. Based on the operation results, a HIM simulator was developed using the commercial process-simulation software. The operation and simulation results showed that zero...
Article
The simulation and design of a HIDiC using gPROMS are presented. To show the validity of the present simulation model, results by the present model were compared with experimental data by a bench-scale HIDiC. The test plant was a double pipe heat exchanger system, which consists of shell and tube column. Good agreement was found between experimenta...
Article
A simulator for internally heat integrated distillation columns (HIDiC) with a rate based model was developed. Using a mass transfer correlation for structured packings and Chilton-Colburn analogy, heat transfer coefficients for the liquid phase were estimated. Although the effects of the compression ratio and the reflux ratio on the composition pr...
Article
The model for the bench plant of internally heat-integrated distillation column (HIDiC) with structured packings was developed by a rate-based model and the separation of benzene-toluene binary mixture was simulated. The developed model has been applied as bench-plant for HIDiC, and their separation and operation performance was described. The vali...
Article
Exergy analysis of an ideal heat-integrated distillation column is conducted in this paper. It is found that the process is most favourable to the separation of binary close-boiling mixtures. Pressure elevation from stripping section to rectifying section appears to be a critical design variable that can affect the thermodynamic efficiency of the p...
Article
Seeking internal heat integration between the whole rectifying section and the whole stripping section gives rise to two alternatives for the arrangement of a reboiler in an internally heat-integrated distillation column. One is to locate it at the bottom of the process (scheme A) and the other on the pipeline of the feed flow (scheme B). Although...
Article
A novel technique has been developed to directly produce fine ceramic powders from liquid solution using a spray pyrolysis and fluidized bed hybrid system. Using this technique, the preparation of lithium manganese oxides LiMn2O4, which are the most promising cathode materials for lithium-ion batteries, has been carried out for various superficial...
Article
With the aid of the McCabe-Thiele diagram, heuristic synthesis of an internally heat-integrated distillation column is addressed in this work. A new scheme for internal heat integration between a rectifying section and a stripping section is derived with the introduction of double-feed arrangement. The process configuration is characterized by its...
Article
In this paper, the static and dynamic influences of pressure distribution are examined on an ideal heat-integrated distillation column. In the aspect of process design, pressure distribution is found to have an effect upon the thermodynamic efficiency and it appears beneficial to explore an optimum pressure distribution during process development....
Article
Process asymmetry often introduces severe difficulties to process modeling and worsens control system performance. In this work, a simple modeling framework is proposed, which can effectively trade-off the difference between positive and negative process dynamics. It is characterized by small modeling effort in the consideration of process asymmetr...
Article
The developments of internally HIDiC since 1950's up to the present are presented. Since 1980's, researches on distillation columns with the SRV method were carried out under the name of the HIDiC in Japan. They further analyzed and modified the original arrangement of the SRV method. From 1990's, a national project on the HIDiC in Japan was conduc...
Article
Energy savings of distillation processes are inevitable demands for the sustainable world since the distillation processes are the biggest energy consumers in the chemical industries. An internally heat-integrated distillation columns (HIDiC) is one of the promising alternatives of the conventional distillation processes to reduce the energy consum...
Article
A novel technique has been developed to directly produce fine ceramic powders from liquid solution using a spray pyrolysis and fluidized bed hybrid system. Using this technique, lithium manganese oxides, LiMn2O 4, which are the active cathode materials for lithium ion battery, have been prepared at various gas flow rates and static bed height. The...
Article
A simple technique has been developed to directly produce fine ceramics powders from liquid solution by drip pyrolysis in a fluidized bed reactor. Using this technique, the preparation of lithium manganese oxides LiMn2O4, which are the most promising cathode materials for lithium ion battery, has been carried out for various superficial gas velocit...
Article
Spinel LiMn2O4 particles were successfully synthesized by an ultrasonic spray pyrolysis method from the precursor solutions; various combinations of nitrate, acetates or formats of lithium and manganese were stoichiometrically dissolved in distilled water. The product characteristics, such as crystallinity, specific surface area, particle morpholog...
Article
Spinel lithium manganese oxide powders were prepared directly by a continuous droplet-to-particle conversion process using an ultrasonic spray pyrolysis method. Nine kinds of precursor solutions were used to synthesize LiMn2O4 powders. The aqueous precursor solutions were made from various combinations of Li-salt, such as Li(HCOO) · H2O, Li(CH3COO)...

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