Japan Science and Technology Agency

Other

Tohoku Techno Arch Co., Ltd.

Tdk Corporation

Dowa Mining Co., Ltd.

Masuo Okada

Hitoshi Takamura

Takahiro Kuriiwa

Dai Matsuoka

Tomoyuki Saito

Masatada Yodogawa

Masayuki Ogawa

Takahiro Sawaguchi

To provide a method and an apparatus for reforming a hydrocarbon with a prolonged life of an oxygen-permeable membrane and a high recovery rate. The oxygen-permeable membrane absorbs the free energy change, &#x394;G, of a partial oxidation reforming reaction and then converts it into work for oxygen isolation and Joule heat, Q. Here, as seen in Table 1 and FIG., &#x394;G of the partial oxidation reforming reaction is approximately ten times larger than &#x394;H, and further increases as the temperature increases. The generated Joule heat, Q, has to be removed at a high efficiency, and this removal process is achieved by returning a portion of the Joule heat to the system as the entropy change, T&#x394;S, of the partial oxidation reaction itself and by steam reforming using the total energy change, &#x394;H.

Method and apparatus for hydrocarbon reforming based on oxygen-permeable membrane

It is a composite-type mixed oxygen ion and electronic conductor, in which an oxygen ion conductive phase consists of gadolinium-doped cerium oxide (GDC), an electronic conductive phase consists of spinel-type ferrite (CFO), the particle diameters of both phases are 1 &#x3bc;m or less, respectively, both phases are uniformly mixed mutually, and both phases form respective conductive networks. Both phases have low solid solubility mutually, chemical reactions are not easily caused between both phases, and even if chemical reactions are caused between both phases, different phase to disturb mixed conductivity is not formed. And it has high oxygen permeability, and does not easily cause aged deterioration.

Complex mixed conductor containing Pr-doped cerium oxide and spinel-type ferrite and its preparation method

Complex mixed conductor and its preparing method

A method for absorbing and releasing hydrogen comprises applying repeatedly hydrogen pressurization and depressurization to a hydrogen storage metal alloy of a body-centered cubic structure-type phase exerting a two-stage or inclined plateau characteristic in a hydrogen storage amount vs hydrogen pressure relation in an appropriate fashion to absorb and release hydrogen. At least at one stage during the release of hydrogen, the temperature (T) of the above-mentioned hydrogen storage metal alloy is made higher than the temperature (T) of the hydrogen storage metal alloy during the hydrogen absorption process (T&#x3e;T). This enables the release and utilization of occluded hydrogen at a low-pressure plateau region or an inclined plateau lower region.

Hydrogen storage metal alloy, method for absorption and release of hydrogen using the said alloy and hydrogen fuel battery using the said method

A method for absorbing and releasing hydrogen comprises applying repeatedly hydrogen pressurization and depressurization to a hydrogen storage metal alloy of a body-centered cubic structure-type phase exerting a two-stage or inclined plateau characteristic in a hydrogen storage amount vs hydrogen pressure relation in an appropriate fashion to absorb and release hydrogen. At least at one stage during the release of hydrogen, the temperature (T ) of the above-mentioned hydrogen storage metal alloy is made higher than the temperature (T ) of the hydrogen storage metal alloy during the hydrogen absorption process (T >T ). This enables the release and utilization of occluded hydrogen at a low-pressure plateau region or an inclined plateau lower region.

Alloy for hydrogen storage, method for absorption and release of hydrogen using the alloy, and hydrogen fuel cell using the method

The PTC thermistor material of the invention comprises a matrix phase and electrically conductive phases substantially uniformly dispersed in the matrix phase, said conductive phases having a resistivity lower than that of the matrix phase, and has a resistivity changing sharply in the vicinity of the melting point of the conductive phases. The matrix phase is made up of any one of a polycrystalline ceramic material, a glass-polycrystalline ceramic composite material, a glass, a crystallized glass, and a polymer material, and the conductive phases are made up of a metal containing bismuth as a main component. It is thus possible to achieve a PTC thermistor material which can be controlled in terms of various properties such as the temperature at which PTCR property becomes available and the rate of resistivity change and so can be applied to circuit parts through which large currents pass in a normal operation state. Further, the PTC thermistor material can be easily manufactured with the stable PTCR property maintained. Furthermore, the PTC thermistor material can be operated with an increased rated current albeit being of small size, and has a high degree of shape freedom.

Growing community of inventors

Sendai, Japan

Masuo Okada