The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform
Yasukazu Saito - One of the best experts on this subject based on the ideXlab platform.
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Catalytic hydrogen supply from a decalin-based Chemical Hydride under superheated liquid-film conditions
New Developments and Application in Chemical Reaction Engineering, 2006Co-Authors: Shinya Hodoshima, Atsushi Shono, Kaziumi Satoh, Yasukazu SaitoAbstract:Efficient hydrogen supply from decalin was only accomplished by the superheated liquid-film-type catalysis under reactive distillation conditions at moderate heating temperatures of 210-240°C. Carbon-supported nano-size platinum-based catalysts in the superheated liquid-film states accelerated product desorption from the catalyst surface due to its temperature gradient under boiling conditions, so that both high reaction rates and conversions were obtained simultaneously.
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hydrogen storage by decalin naphthalene pair and hydrogen supply to fuel cells by use of superheated liquid film type catalysis
Applied Catalysis A-general, 2005Co-Authors: Shinya Hodoshima, Atsushi Shono, Shigeki Takaiwa, Kazumi Satoh, Yasukazu SaitoAbstract:Abstract A catalytic reaction pair of decalin dehydrogenation/naphthalene hydrogenation has been proposed as a storage medium for fuel-cell hydrogen in mobile modes. The hydrogen capacities with decalin (7.3 wt.%, 64.8 kg-H 2 m 3 ) are higher than the target values of the Department of Energy, USA (6.5 wt.%, 62.0 kg-H 2 m 3 ). Platinum–rhenium composite catalysts supported on granular activated carbon in “superheated liquid-film” states gave excellent reactivities for decalin dehydrogenation, where the conversion of almost 100% from decalin to naphthalene was attained within 1 h by heating at 280 °C in a batch-wise reactor. “Superheated liquid-film” conditions were also realized in a continuous-type reactor at the same temperature (280 °C). With the goal of maintaining rapid evolution of hydrogen stationarily, a rather wide range of decalin feed rates was allowable with use of platinum particles supported on activated carbon cloth. Decalin should be evaluated as an organic Chemical Hydride not only because of its storage densities but also because of its potential power densities for fuel-cell vehicles.
Ai-mei Zou - One of the best experts on this subject based on the ideXlab platform.
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hyphenation of flow injection sequential injection with Chemical Hydride vapor generation atomic fluorescence spectrometry
Talanta, 2007Co-Authors: Ming-li Chen, Ai-mei ZouAbstract:The dominant role played by flow injection/sequential injection (FI/SI, including lab-on-valve, LOV) in automatic on-line sample pretreatments coupling to various detection techniques is amply demonstrated by the large number of publications it has given rise to. Among these, its hyphenation with Hydride/vapor generation atomic fluorescence spectrometry (HG/VG-AFS) has become one of the most attractive sub-branches during the last years, attributed not only to the high sensitivity of this technique, but also to the superb separation capability of Hydride/vapor forming elements from complex sample matrices. In addition, it also provides potentials for the speciation of the elements of interest. It is worth mentioning that quite a few novel developments of sample pretreatment have emerged recently, which attracted extensive attentions from the related fields of research. The aim of this mini-review is thus to illustrate the state-of-the-art progress of implementing flow injection/sequential injection and miniaturized lab-on-valve systems for on-line Hydride/vapor generation separation and preconcentration of vapor forming elements followed with detection by atomic fluorescence spectrometry, within the period from 2004 up to now. Future perspectives in this field are also discussed.
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Hyphenation of flow injection/sequential injection with Chemical Hydride/vapor generation atomic fluorescence spectrometry
Talanta, 2007Co-Authors: Ming-li Chen, Ai-mei ZouAbstract:The dominant role played by flow injection/sequential injection (FI/SI, including lab-on-valve, LOV) in automatic on-line sample pretreatments coupling to various detection techniques is amply demonstrated by the large number of publications it has given rise to. Among these, its hyphenation with Hydride/vapor generation atomic fluorescence spectrometry (HG/VG-AFS) has become one of the most attractive sub-branches during the last years, attributed not only to the high sensitivity of this technique, but also to the superb separation capability of Hydride/vapor forming elements from complex sample matrices. In addition, it also provides potentials for the speciation of the elements of interest. It is worth mentioning that quite a few novel developments of sample pretreatment have emerged recently, which attracted extensive attentions from the related fields of research. The aim of this mini-review is thus to illustrate the state-of-the-art progress of implementing flow injection/sequential injection and miniaturized lab-on-valve systems for on-line Hydride/vapor generation separation and preconcentration of vapor forming elements followed with detection by atomic fluorescence spectrometry, within the period from 2004 up to now. Future perspectives in this field are also discussed.
Shinya Hodoshima - One of the best experts on this subject based on the ideXlab platform.
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Catalytic hydrogen supply from a decalin-based Chemical Hydride under superheated liquid-film conditions
New Developments and Application in Chemical Reaction Engineering, 2006Co-Authors: Shinya Hodoshima, Atsushi Shono, Kaziumi Satoh, Yasukazu SaitoAbstract:Efficient hydrogen supply from decalin was only accomplished by the superheated liquid-film-type catalysis under reactive distillation conditions at moderate heating temperatures of 210-240°C. Carbon-supported nano-size platinum-based catalysts in the superheated liquid-film states accelerated product desorption from the catalyst surface due to its temperature gradient under boiling conditions, so that both high reaction rates and conversions were obtained simultaneously.
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hydrogen storage by decalin naphthalene pair and hydrogen supply to fuel cells by use of superheated liquid film type catalysis
Applied Catalysis A-general, 2005Co-Authors: Shinya Hodoshima, Atsushi Shono, Shigeki Takaiwa, Kazumi Satoh, Yasukazu SaitoAbstract:Abstract A catalytic reaction pair of decalin dehydrogenation/naphthalene hydrogenation has been proposed as a storage medium for fuel-cell hydrogen in mobile modes. The hydrogen capacities with decalin (7.3 wt.%, 64.8 kg-H 2 m 3 ) are higher than the target values of the Department of Energy, USA (6.5 wt.%, 62.0 kg-H 2 m 3 ). Platinum–rhenium composite catalysts supported on granular activated carbon in “superheated liquid-film” states gave excellent reactivities for decalin dehydrogenation, where the conversion of almost 100% from decalin to naphthalene was attained within 1 h by heating at 280 °C in a batch-wise reactor. “Superheated liquid-film” conditions were also realized in a continuous-type reactor at the same temperature (280 °C). With the goal of maintaining rapid evolution of hydrogen stationarily, a rather wide range of decalin feed rates was allowable with use of platinum particles supported on activated carbon cloth. Decalin should be evaluated as an organic Chemical Hydride not only because of its storage densities but also because of its potential power densities for fuel-cell vehicles.
Taegyu Kim - One of the best experts on this subject based on the ideXlab platform.
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Development of NaBH4-Based Hydrogen Generator for Fuel Cell Unmanned Aerial Vehicles with Movable Fuel Cartridge
Energy Procedia, 2019Co-Authors: Soonmo Kwon, Kang Shinuang, Taegyu KimAbstract:Abstract NaBH4-based hydrogen generator for fuel cell Unmanned Aerial Vehicle (UAVs) with movable fuel cartridge was developed in the present study. The main fuel of hydrogen generator is Sodium boroHydride (NaBH4) that is a kind of Chemical Hydride and has a high hydrogen storage density. In the previous studies, hydrogen generators were developed in which hydrogen was directly generated from solid state NaBH4. However, it was a prototype, so inconvenient to replace the fuel after used up and lacked user convenience. Therefore, the performance evaluation and the development procedure of NaBH4-based hydrogen generator that was designed taking user convenience in consideration for commercialization were described in this paper.
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Compact PEM fuel cell system combined with all-in-one hydrogen generator using Chemical Hydride as a hydrogen source
Applied Energy, 2015Co-Authors: Jincheol Kim, Taegyu KimAbstract:Compact fuel cell system was developed for a portable power generator. The power generator features a polymer electrolyte membrane fuel cell (PEMFC) using a Chemical Hydride as a hydrogen source. The hydrogen generator extracted hydrogen using a catalytic hydrolysis from a sodium boroHydride alkaline solution. A novel concept using an all-in-one reactor was proposed in which a catalyst, hydrogen chamber and byproduct separator were combined in a volume. In addition, the reactor as well as a pump, cooling fans, valves and controller was integrated in a single module. A 100W PEMFC stack was connected with the hydrogen generator and was evaluated at various load conditions. It was verified that the stable hydrogen supply was achieved and the developed system can be used to drive fuel cell-powered unmanned autonomous systems.
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Compact PEM Fuel Cell System Using Chemical Hydride Hydrogen Source for Portable Power Generators
Energy Procedia, 2014Co-Authors: Jincheol Kim, Taegyu KimAbstract:Abstract Compact PEM fuel cell system was developed for portable power generators. The power generator features a PEM fuel cell using a Chemical Hydride as a hydrogen source. The hydrogen generator extracts hydrogen using a catalytic hydrolysis from a sodium boroHydride alkaline solution. A novel concept using an all-in-one reactor was proposed in which a catalyst, hydrogen temporary chamber and byproduct separator was included. In addition, the reactor as well as a pump, cooling fans, valves and controller was integrated in a single module. A 200 W PEM fuel cell stack was connected with the hydrogen generator and was evaluated at the various load conditions. Considering the fast response to a sudden power load, a hybrid power management of the fuel cell and battery was contrived. The fuel cell system had a high gravimetric energy density of 425 W-hr/kg. The capability of the developed fuel cell system was validated by applying to a small unmanned aircraft. The fuel cell-powered flight test was conducted, providing three times higher flight endurance compared to the existing batteries.
Ming-li Chen - One of the best experts on this subject based on the ideXlab platform.
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hyphenation of flow injection sequential injection with Chemical Hydride vapor generation atomic fluorescence spectrometry
Talanta, 2007Co-Authors: Ming-li Chen, Ai-mei ZouAbstract:The dominant role played by flow injection/sequential injection (FI/SI, including lab-on-valve, LOV) in automatic on-line sample pretreatments coupling to various detection techniques is amply demonstrated by the large number of publications it has given rise to. Among these, its hyphenation with Hydride/vapor generation atomic fluorescence spectrometry (HG/VG-AFS) has become one of the most attractive sub-branches during the last years, attributed not only to the high sensitivity of this technique, but also to the superb separation capability of Hydride/vapor forming elements from complex sample matrices. In addition, it also provides potentials for the speciation of the elements of interest. It is worth mentioning that quite a few novel developments of sample pretreatment have emerged recently, which attracted extensive attentions from the related fields of research. The aim of this mini-review is thus to illustrate the state-of-the-art progress of implementing flow injection/sequential injection and miniaturized lab-on-valve systems for on-line Hydride/vapor generation separation and preconcentration of vapor forming elements followed with detection by atomic fluorescence spectrometry, within the period from 2004 up to now. Future perspectives in this field are also discussed.
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Hyphenation of flow injection/sequential injection with Chemical Hydride/vapor generation atomic fluorescence spectrometry
Talanta, 2007Co-Authors: Ming-li Chen, Ai-mei ZouAbstract:The dominant role played by flow injection/sequential injection (FI/SI, including lab-on-valve, LOV) in automatic on-line sample pretreatments coupling to various detection techniques is amply demonstrated by the large number of publications it has given rise to. Among these, its hyphenation with Hydride/vapor generation atomic fluorescence spectrometry (HG/VG-AFS) has become one of the most attractive sub-branches during the last years, attributed not only to the high sensitivity of this technique, but also to the superb separation capability of Hydride/vapor forming elements from complex sample matrices. In addition, it also provides potentials for the speciation of the elements of interest. It is worth mentioning that quite a few novel developments of sample pretreatment have emerged recently, which attracted extensive attentions from the related fields of research. The aim of this mini-review is thus to illustrate the state-of-the-art progress of implementing flow injection/sequential injection and miniaturized lab-on-valve systems for on-line Hydride/vapor generation separation and preconcentration of vapor forming elements followed with detection by atomic fluorescence spectrometry, within the period from 2004 up to now. Future perspectives in this field are also discussed.