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Juan B. Montón - One of the best experts on this subject based on the ideXlab platform.
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Densities, refractive indices, and derived excess properties of the binary systems tert-butyl alcohol+toluene, +Methylcyclohexane, and +isooctane and toluene+Methylcyclohexane, and the ternary system tert-butyl alcohol+toluene+Methylcyclohexane at 29
Fluid Phase Equilibria, 1999Co-Authors: M.pilar Peña, V. Martínez-soria, Juan B. MontónAbstract:Abstract This paper reports experimental densities and refractive indices of the binary systems tert -butyl alcohol (TBA)+toluene, +isooctane, and +Methylcyclohexane, and toluene+Methylcyclohexane, and the ternary system TBA+toluene+Methylcyclohexane, over the entire range of composition at 298.15 K. Excess molar volumes and changes of refractive indices were evaluated from the experimental data obtained. These derived properties were fitted to variable-degree polynomials. The experimental values of physical properties were compared with the values estimated by different methods of prediction.
Naotsugu Itoh - One of the best experts on this subject based on the ideXlab platform.
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a membrane reactor for hydrogen storage and transport system using cyclohexane Methylcyclohexane mixtures
Desalination, 2008Co-Authors: Naotsugu Itoh, Shunsuke Watanabe, Takafumi Sato, K Kawasoe, Tomoya TsujiAbstract:Abstract Cyclohexane is recognized to be one of the promising hydrogen storage materials but it is pointed out that its freezing point (ca. 6.5°C) is too high to use in the cold district. In this study, therefore, the mixtures of cyclohexane with Methylcyclohexane as a hybrid chemical hydride were proposed to lower the freezing point. The hydrogen recovery from the mixtures was testified by being dehydrogenated with a palladium membrane reactor up to 300°C and 4 bar, in which hydrogen generated was selectively separated from the catalyst-packed bed through a palladium membrane and obtained as purified hydrogen on the permeate side. An addition of 20 mol% Methylcyclohexane to cyclohexane resulted in about 40°C decrease in the freezing point. The increase in conversion became larger in a region of high reaction pressure because a larger pressure difference increased the amount of hydrogen separated. The conversion of Methylcyclohexane was higher than that of cyclohexane at the same condition. In the dehydrogenation of the mixtures, each conversion was found not to be affected by the other very much. In conclusion, the mixtures of Methylcyclohexane and cyclohexane can be a hybrid type of chemical hydride, which will be available as a liquid hydrogen carrier at −30°C.
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A membrane reactor for hydrogen storage and transport system using cyclohexane–Methylcyclohexane mixtures
Desalination, 2008Co-Authors: Naotsugu Itoh, Shunsuke Watanabe, Takafumi Sato, K Kawasoe, Tomoya TsujiAbstract:Abstract Cyclohexane is recognized to be one of the promising hydrogen storage materials but it is pointed out that its freezing point (ca. 6.5°C) is too high to use in the cold district. In this study, therefore, the mixtures of cyclohexane with Methylcyclohexane as a hybrid chemical hydride were proposed to lower the freezing point. The hydrogen recovery from the mixtures was testified by being dehydrogenated with a palladium membrane reactor up to 300°C and 4 bar, in which hydrogen generated was selectively separated from the catalyst-packed bed through a palladium membrane and obtained as purified hydrogen on the permeate side. An addition of 20 mol% Methylcyclohexane to cyclohexane resulted in about 40°C decrease in the freezing point. The increase in conversion became larger in a region of high reaction pressure because a larger pressure difference increased the amount of hydrogen separated. The conversion of Methylcyclohexane was higher than that of cyclohexane at the same condition. In the dehydrogenation of the mixtures, each conversion was found not to be affected by the other very much. In conclusion, the mixtures of Methylcyclohexane and cyclohexane can be a hybrid type of chemical hydride, which will be available as a liquid hydrogen carrier at −30°C.
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Hydrogen solubility of mixed naphthenes and aromatics for a new hydrogen storage medium in fuel cell system
Fluid Phase Equilibria, 2007Co-Authors: Tomoya Tsuji, Toshihiko Hiaki, Naotsugu ItohAbstract:Abstract Hydrogen solubility was measured for four equimolar binary solvent mixtures, benzene + toluene, cyclohexane + Methylcyclohexane, benzene + Methylcyclohexane and cyclohexane + toluene, and an equimolar quaternary, benzene + cyclohexane + Methylcyclohexane + toluene, in the pressure range from 1.077 to 4.580 MPa at 303.15 K. The hydrogen solubility increased linearly with the pressure for all systems. The binary interaction parameters, in a mixing rule of Peng–Robinson (PR) equation of state, were determined for benzene + toluene and cyclohexane + Methylcyclohexane from the vapor–liquid equilibrium data of literature, and that for benzene + Methylcyclohexane and cyclohexane + toluene from the hydrogen solubility data in the binary solvent mixture. Using the optimized binary interaction parameters, PR equation well predicted the experimental data for the quaternary.
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Hydrogen storage using cyclohexane-Methylcyclohexane mixtures available in a freezing region
2006Co-Authors: Shunsuke Watanabe, Tomoya Tsuji, Takafumi Sato, Naotsugu ItohAbstract:The mixtures of mehtylcyclohexane and cyclohexane were proposed as another chemical hydride. Addition of 10mol% Methylcyclohexane to cyclohexane could lead to about 25 oC depressions in the solidification temperature of cyclohexane, which means that the freezing point become as low as ca. -20 oC. Further, Methylcyclohexane and a mixture consisting of 10mol% Methylcyclohexane and 90mol% cyclohexane were dehydrogenated using a membrane reactor, where the evolved hydrogen was selectively separated from the catalyst-packed reaction zone through a palladium membrane that is impervious to any gases except hydrogen. In any case, both the decrease of feed rate and the increase of the pressure of reaction side increased the amount of hydrogen recovered through membrane in the range of 250 – 300 O C and 2-4bar.
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hydrogen solubility in a chemical hydrogen storage medium aromatic hydrocarbon cyclic hydrocarbon and their mixture for fuel cell systems
Fluid Phase Equilibria, 2005Co-Authors: Tomoya Tsuji, Yoshiko Shinya, Toshihiko Hiaki, Naotsugu ItohAbstract:Abstract A synthetic type apparatus was designed to measure hydrogen solubility in four pure aromatic or cyclic hydrocarbons, benzene, cyclohexane, toluene, and Methylcyclohexane, and two equimolar binary mixtures, benzene + cyclohexane, and Methylcyclohexane + toluene. The experimental temperature was 303.15 K, and the pressure range from 0.887 to 4.827 MPa. The hydrogen solubility increased linearly with the pressure following the Henry's law. The hydrogen solubility in benzene was smaller than that in cyclohexane. Similarly, the solubility in toluene was smaller than in Methylcyclohexane. In the measurement for the mixtures, the mole ratio of benzene:cyclohexane and Methylcyclohexane:toluene was set to 1:1. The hydrogen solubility in the equimolar mixtures was lower than that in pure cyclic hydrocarbon, cyclohexane or Methylcyclohexane. The experimental solubility data in pure hydrocarbons were correlated with the Peng–Robinson (PR) equation of state using van der Waals one fluid mixing rule. Using binary interaction parameters in the mixing rule, the hydrogen solubility in the mixtures was predicted well.
Tomoya Tsuji - One of the best experts on this subject based on the ideXlab platform.
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a membrane reactor for hydrogen storage and transport system using cyclohexane Methylcyclohexane mixtures
Desalination, 2008Co-Authors: Naotsugu Itoh, Shunsuke Watanabe, Takafumi Sato, K Kawasoe, Tomoya TsujiAbstract:Abstract Cyclohexane is recognized to be one of the promising hydrogen storage materials but it is pointed out that its freezing point (ca. 6.5°C) is too high to use in the cold district. In this study, therefore, the mixtures of cyclohexane with Methylcyclohexane as a hybrid chemical hydride were proposed to lower the freezing point. The hydrogen recovery from the mixtures was testified by being dehydrogenated with a palladium membrane reactor up to 300°C and 4 bar, in which hydrogen generated was selectively separated from the catalyst-packed bed through a palladium membrane and obtained as purified hydrogen on the permeate side. An addition of 20 mol% Methylcyclohexane to cyclohexane resulted in about 40°C decrease in the freezing point. The increase in conversion became larger in a region of high reaction pressure because a larger pressure difference increased the amount of hydrogen separated. The conversion of Methylcyclohexane was higher than that of cyclohexane at the same condition. In the dehydrogenation of the mixtures, each conversion was found not to be affected by the other very much. In conclusion, the mixtures of Methylcyclohexane and cyclohexane can be a hybrid type of chemical hydride, which will be available as a liquid hydrogen carrier at −30°C.
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A membrane reactor for hydrogen storage and transport system using cyclohexane–Methylcyclohexane mixtures
Desalination, 2008Co-Authors: Naotsugu Itoh, Shunsuke Watanabe, Takafumi Sato, K Kawasoe, Tomoya TsujiAbstract:Abstract Cyclohexane is recognized to be one of the promising hydrogen storage materials but it is pointed out that its freezing point (ca. 6.5°C) is too high to use in the cold district. In this study, therefore, the mixtures of cyclohexane with Methylcyclohexane as a hybrid chemical hydride were proposed to lower the freezing point. The hydrogen recovery from the mixtures was testified by being dehydrogenated with a palladium membrane reactor up to 300°C and 4 bar, in which hydrogen generated was selectively separated from the catalyst-packed bed through a palladium membrane and obtained as purified hydrogen on the permeate side. An addition of 20 mol% Methylcyclohexane to cyclohexane resulted in about 40°C decrease in the freezing point. The increase in conversion became larger in a region of high reaction pressure because a larger pressure difference increased the amount of hydrogen separated. The conversion of Methylcyclohexane was higher than that of cyclohexane at the same condition. In the dehydrogenation of the mixtures, each conversion was found not to be affected by the other very much. In conclusion, the mixtures of Methylcyclohexane and cyclohexane can be a hybrid type of chemical hydride, which will be available as a liquid hydrogen carrier at −30°C.
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Hydrogen solubility of mixed naphthenes and aromatics for a new hydrogen storage medium in fuel cell system
Fluid Phase Equilibria, 2007Co-Authors: Tomoya Tsuji, Toshihiko Hiaki, Naotsugu ItohAbstract:Abstract Hydrogen solubility was measured for four equimolar binary solvent mixtures, benzene + toluene, cyclohexane + Methylcyclohexane, benzene + Methylcyclohexane and cyclohexane + toluene, and an equimolar quaternary, benzene + cyclohexane + Methylcyclohexane + toluene, in the pressure range from 1.077 to 4.580 MPa at 303.15 K. The hydrogen solubility increased linearly with the pressure for all systems. The binary interaction parameters, in a mixing rule of Peng–Robinson (PR) equation of state, were determined for benzene + toluene and cyclohexane + Methylcyclohexane from the vapor–liquid equilibrium data of literature, and that for benzene + Methylcyclohexane and cyclohexane + toluene from the hydrogen solubility data in the binary solvent mixture. Using the optimized binary interaction parameters, PR equation well predicted the experimental data for the quaternary.
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Hydrogen storage using cyclohexane-Methylcyclohexane mixtures available in a freezing region
2006Co-Authors: Shunsuke Watanabe, Tomoya Tsuji, Takafumi Sato, Naotsugu ItohAbstract:The mixtures of mehtylcyclohexane and cyclohexane were proposed as another chemical hydride. Addition of 10mol% Methylcyclohexane to cyclohexane could lead to about 25 oC depressions in the solidification temperature of cyclohexane, which means that the freezing point become as low as ca. -20 oC. Further, Methylcyclohexane and a mixture consisting of 10mol% Methylcyclohexane and 90mol% cyclohexane were dehydrogenated using a membrane reactor, where the evolved hydrogen was selectively separated from the catalyst-packed reaction zone through a palladium membrane that is impervious to any gases except hydrogen. In any case, both the decrease of feed rate and the increase of the pressure of reaction side increased the amount of hydrogen recovered through membrane in the range of 250 – 300 O C and 2-4bar.
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hydrogen solubility in a chemical hydrogen storage medium aromatic hydrocarbon cyclic hydrocarbon and their mixture for fuel cell systems
Fluid Phase Equilibria, 2005Co-Authors: Tomoya Tsuji, Yoshiko Shinya, Toshihiko Hiaki, Naotsugu ItohAbstract:Abstract A synthetic type apparatus was designed to measure hydrogen solubility in four pure aromatic or cyclic hydrocarbons, benzene, cyclohexane, toluene, and Methylcyclohexane, and two equimolar binary mixtures, benzene + cyclohexane, and Methylcyclohexane + toluene. The experimental temperature was 303.15 K, and the pressure range from 0.887 to 4.827 MPa. The hydrogen solubility increased linearly with the pressure following the Henry's law. The hydrogen solubility in benzene was smaller than that in cyclohexane. Similarly, the solubility in toluene was smaller than in Methylcyclohexane. In the measurement for the mixtures, the mole ratio of benzene:cyclohexane and Methylcyclohexane:toluene was set to 1:1. The hydrogen solubility in the equimolar mixtures was lower than that in pure cyclic hydrocarbon, cyclohexane or Methylcyclohexane. The experimental solubility data in pure hydrocarbons were correlated with the Peng–Robinson (PR) equation of state using van der Waals one fluid mixing rule. Using binary interaction parameters in the mixing rule, the hydrogen solubility in the mixtures was predicted well.
M.pilar Peña - One of the best experts on this subject based on the ideXlab platform.
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Densities, refractive indices, and derived excess properties of the binary systems tert-butyl alcohol+toluene, +Methylcyclohexane, and +isooctane and toluene+Methylcyclohexane, and the ternary system tert-butyl alcohol+toluene+Methylcyclohexane at 29
Fluid Phase Equilibria, 1999Co-Authors: M.pilar Peña, V. Martínez-soria, Juan B. MontónAbstract:Abstract This paper reports experimental densities and refractive indices of the binary systems tert -butyl alcohol (TBA)+toluene, +isooctane, and +Methylcyclohexane, and toluene+Methylcyclohexane, and the ternary system TBA+toluene+Methylcyclohexane, over the entire range of composition at 298.15 K. Excess molar volumes and changes of refractive indices were evaluated from the experimental data obtained. These derived properties were fitted to variable-degree polynomials. The experimental values of physical properties were compared with the values estimated by different methods of prediction.
Rosa Munoz - One of the best experts on this subject based on the ideXlab platform.
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phase equilibria in the systems 3 methylpentane Methylcyclohexane diisopropyl ether Methylcyclohexane and 3 methylpentane diisopropyl ether Methylcyclohexane at 101 3 kpa
Fluid Phase Equilibria, 2002Co-Authors: Sonia Loras, Antonio Aucejo, Rosa MunozAbstract:Abstract Consistent vapor–liquid equilibria (VLE) at 101.3 kPa has been determined for the ternary system 3-methylpentane+diisopropyl ether (DIPE)+Methylcyclohexane and the binary subsystems 3-methylpentane+Methylcyclohexane and DIPE+Methylcyclohexane in the temperature range from 336 to 374 K. According to the experimental results, the systems exhibit slight positive deviation from ideal behavior and no azeotrope is present. The VLE data have been correlated with the composition using the Wilson, UNIQUAC and NRTL relations. These models allow good prediction of the VLE properties of the ternary system from those of the pertinent binary subsystems.
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Phase equilibria in the systems 3-methylpentane + Methylcyclohexane, diisopropyl ether + Methylcyclohexane and 3-methylpentane + diisopropyl ether + Methylcyclohexane at 101.3 kPa
Fluid Phase Equilibria, 2001Co-Authors: Sonia Loras, Antonio Aucejo, Rosa MunozAbstract:Abstract Consistent vapor–liquid equilibria (VLE) at 101.3 kPa has been determined for the ternary system 3-methylpentane+diisopropyl ether (DIPE)+Methylcyclohexane and the binary subsystems 3-methylpentane+Methylcyclohexane and DIPE+Methylcyclohexane in the temperature range from 336 to 374 K. According to the experimental results, the systems exhibit slight positive deviation from ideal behavior and no azeotrope is present. The VLE data have been correlated with the composition using the Wilson, UNIQUAC and NRTL relations. These models allow good prediction of the VLE properties of the ternary system from those of the pertinent binary subsystems.