Faculty Profiles - HIBINO, Takashi

Papers - HIBINO, Takashi

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総説：化石燃料発電システムとクリーンテクノロジー：炭酸ガスが発生しない発電システム

日比野高士

化学装置 Vol. 39 page： 78-80 1997

Fluidizing behaviour of magnesia and silica ultra-fine powders at elevated temperature Reviewed

Ushiki K., Hibino T., Sato T., Mizuno M.

Kagaku Kogaku Ronbunshu Vol. 22 ( 2 ) page： 332 - 333 1996.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Kagaku Kogaku Ronbunshu

The influence of initial agglomerate-size, gas velocity, and temperature on fluidizing behaviour and bed expansion of ultra-fine powders was examined by the use of a transparent set-up. The fluidizing behaviour was observed through transparent walls. Its behaviour was related to the change in primary agglom erate-size and the assumed secondary-one. The results showed that initial agglomerates were preservable to a certain degree during fluidization and that the size of the initial agglomerate considerably affected the fluidizing behaviour. Adsorbed water even binded strongly to the particle surface influencing secondary-agglomerate-size, and thus the amount of the adsorbed water significantly affected the fluidizing behaviour in the case of magnesia powder. Due to the formation of secondary agglomerates, incipient gas velocity increased at elevated temperature with decreasing initial agglomerate-size. It was found that a rise in gas velocity and bed expansion of up to 2 or 3 times cause almost no change in size of an assumed secondary agglomerate, at least in an uniform bed.

Scopus

Electrochemical removal of NO and CH4 in the presence of excess O-2, H2O and CO2 using Sm2O3-doped CeO2 as a solid electrolyte Reviewed

Hibino T, Ushiki K, Kuwahara Y, Mizuno M

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS Vol. 92 ( 21 ) page： 4297 - 4300 1996.11

Electrochemical removal of NO and CH<inf>4</inf> in the presence of excess O<inf>2</inf>, H<inf>2</inf>O and CO<inf>2</inf> using Sm<inf>2</inf>O<inf>3</inf>-doped CeO<inf>2</inf> as a solid electrolyte Reviewed

Hibino T., Ushiki K.I., Kuwahara Y., Mizuno M.

Journal of the Chemical Society - Faraday Transactions Vol. 92 ( 21 ) page： 4297 - 4300 1996.11

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of the Chemical Society - Faraday Transactions

Electrochemical removal of NO and CH4 from a gas stream containing excess O2, H2O and CO2 has been carried out between 400 and 800°C using a single-compartment reactor, which is constructed from CeO2-based solid electrolyte with two palladium electrodes. At all temperatures studied, both NO and CH4 were decomposed by applying a direct current to the reactor. NO was decomposed to N2 in two different ways depending on the applied current. At low currents, NO was electrolysed together with O2 at the palladium cathode; and, at high currents, NO was catalytically reduced over the palladium surface free from adsorbed oxygen. By investigating the influences of the concentration of NO, H2O, CO2, CH4 or C3H8 contained in the reactant gas to these two decompositions, their mechanisms are discussed in detail.

DOI： 10.1039/ft9969204297

Scopus

Ultra-fine grinding of La0.8Sr0.2MnO3 oxide by vibration mill Reviewed

Hibino T, Suzuki K, Ushiki K, Kuwahara Y, Mizuno M

APPLIED CATALYSIS A-GENERAL Vol. 145 ( 1-2 ) page： 297 - 306 1996.10

Ultra-fine grinding of La<inf>0.8</inf>Sr<inf>0.2</inf>MnO<inf>3</inf> oxide by vibration mill Reviewed

Hibino T., Suzuki K., Ushiki K.I., Kuwahara Y., Mizuno M.

Applied Catalysis A: General Vol. 145 ( 1-2 ) page： 297 - 306 1996.10

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Applied Catalysis A: General

The grinding operation of La0.8Sn0.2MnO3 (LSM) powder by a vibration mill has been carried out with the intention of giving a higher surface area and a good thermal stability. The specific surface area of the LSM powder increased with operation time and reached up to 34 m2 g-1 for 350 h. XRD measurement and chemical analysis showed that during the grinding operation, the crystal structure of the LSM powder was kept and that the extent of the contamination was negligibly small. In CH4 oxidation at 400°C and N2O reduction at 450°C over the ground LSM powder, both conversions were raised proportional to the increasing specific surface area. Furthermore, the thermal stability of the ground LSM powder was improved by grinding it together with CeO2 powder. The fine dispersion of CeO2 particles around the LSM particles effectively depressed the sintering of the LSM powder at elevated temperatures.

DOI： 10.1016/0926-860X(96)00166-4

Scopus

New concept for simplifying SOFC system Reviewed

Hibino T., Ushiki K., Kuwahara Y.

Solid State Ionics Vol. 91 ( 1-2 ) page： 69 - 74 1996.10

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Solid State Ionics

A novel design for the solid oxide fuel cell (SOFC) has been proposed. By attaching palladium and gold electrodes on the same face of BaCe0.8Gd0.2O3-α electrolyte and feeding a mixture of CH4 and O2 (CH4:O2 mole ratio = 2:1) to the cell at 950°C, electric power could be generated from the cell. The main advantages are that the ohmic resistance of the cell decreased with reducing distance between the two electrodes and that some unit cells were connected in series and parallel with one another on the same electrolyte. In addition, the surface ionic conduction of oxide ion was studied from the standpoint of the surface morphology of the electrolyte.

DOI： 10.1016/s0167-2738(96)00437-7

Scopus

New concept for simplifying SOFC system Reviewed

Hibino T, Ushiki K, Kuwahara Y

SOLID STATE IONICS Vol. 91 ( 1-2 ) page： 69 - 74 1996.10

Electrochemical removal of NO in the presence of excess O<inf>2</inf>, H<inf>2</inf>O and CO<inf>2</inf> using Sm<inf>2</inf>O<inf>3</inf>-doped CeO<inf>2</inf> as a solid electrolyte Reviewed

Hibino T., Ushiki K., Kuwahara Y., Mizuno M.

Solid State Ionics Vol. 89 ( 1-2 ) page： 13 - 16 1996.8

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Solid State Ionics

Electrochemical removal of NO from a gas stream containing 2% O2, 5% H2O and 5% CO2 has been carried out between 400 and 800°C using a single-compartment reactor, constructed from CeO2-based solid electrolyte with two palladium electrodes. At all temperatures studied, NO was decomposed to N2 at the palladium cathode by applying a direct current to the reactor. The dependence of the conversion of NO to N2 on the concentration of NO, O2, H2O or CO2 was investigated at 450°C in detail.

DOI： 10.1016/0167-2738(96)00257-3

Scopus

An electrochemical steam pump using a proton conducting ceramic Reviewed

Iwahara H, Hibino T, Sunano T

JOURNAL OF APPLIED ELECTROCHEMISTRY Vol. 26 ( 8 ) page： 829 - 832 1996.8

Electrochemical removal of NO in the presence of excess O-2, H2O and CO2 using Sm2O3-doped CeO2 as a solid electrolyte Reviewed

Hibino T, Ushiki K, Kuwahara Y, Mizuno M

SOLID STATE IONICS Vol. 89 ( 1-2 ) page： 13 - 16 1996.8

Oxidative coupling of CH4 using alkali-metal ion conductors as a solid electrolyte Reviewed

Hibino T, Ushiki K, Kuwahara Y, Masegi A, Iwahara H

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS Vol. 92 ( 13 ) page： 2393 - 2396 1996.7

Oxidative coupling of CH<inf>4</inf> using alkali-metal ion conductors as a solid electrolyte Reviewed

Hibino T., Ushiki K.I., Kuwahara Y., Masegi A., Iwahara H.

Journal of the Chemical Society - Faraday Transactions Vol. 92 ( 13 ) page： 2393 - 2396 1996.7

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of the Chemical Society - Faraday Transactions

The oxidative coupling of CH4 to C2H4 and C2H6 (C2-hydrocarbons) has been carried out using an Li+ ion conductor as a solid electrolyte. A single-compartment cell is constructed from (Li2O)0.17(BaO)0.07(TiO2) 0.76 (LBT) ceramic with two gold electrodes. Alternative current voltages are applied between the two electrodes with a mixture of 8.3% CH4 and 1.6% O2 in argon. The experiments are carried out under various conditions. The formation of C2-hydrocarbons is the most effectively enhanced at a temperature of 850°C or a frequency of 10 Hz. For example, the conversion of CH4 and the selectivity of C2-hydrocarbons at 3 V are 2 and 1.5 times more than those at the open circuit, respectively. The applications of a dc voltage to a two-compartment cell suggested that the active sites are generated via the cathodic reaction. The mechanism for the formation of C2-hydrocarbons is discussed in detail.

DOI： 10.1039/ft9969202393

Scopus

Studies on solid electrolytes for a new-type SOFC using methane-air mixture Reviewed

Asano K, Hibino T, Iwahara H

DENKI KAGAKU Vol. 64 ( 6 ) page： 649 - 653 1996.6

New concept for simplifying SOFC system Reviewed

Takashi Hibino, Ken-ichi Ushiki, Yoshitaka Kuwahara

Solid State Ionics Vol. 91 page： 69-74 1996

Studies on solid electrolytes for a new-type SOFC using methane-air mixture Reviewed

Koichi Asano, Takashi Hibino, Hiroyasu Iwahara

Denkikagaku Vol. 64 page： 649-653 1996

Electrochemical removal of NO and CH4 in the presence of excess O2, H2O and CO2 using Sm2O3-doped CeO2 as a solid electrolyte Reviewed

Takashi Hibino, Ken-ichi Usiki, Yoshitaka Kuwahara, Mitsukuni Mizuno

Journal of the Chemical Society, Faraday Transactions Vol. 92 page： 4297-4300 1996

Ultra-fine grinding of La0.8Sr0.2MnO3 oxide by vibration mill Reviewed

Takashi Hibino, Kazuo Suzuki, Ken-ichi Ushiki, Yoshitaka Kuwahara, Mitsukuni Mizuno

Applied Catalysis A Vol. 145 page： 297-306 1996

Electrochemical removal of NO in the presence of excess O2, H2O and CO2 using Sm2O3-doped CeO2 as a solid electrolyte Reviewed

Takashi Hibino, Ken-ichi Ushiki, Yositaka Kuwahara, Mitsukuni Mizuno

Solid State Ionics Vol. 89 page： 13-16 1996

Oxidative coupling of CH4 using alkali-metal ion conductors as a solid electrolyte Reviewed

Takashi Hibino, Ken-ichi Usiki, Yoshitaka Kuwahara, Akihiko Masegi, HIroyasu Iwahara

Journal of the Chemical Society, Faraday Transactions Vol. 92 page： 2393-2396 1996

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Papers - HIBINO, Takashi