Kabushiki Kaisha Toshiba

Toshiba Lighting & Technology Corporation

Toyo Engineering Corporation

Kazuaki Nakagawa

Yoshihiro Akasaka

Hideyuki Ohzu

Norihiro Tomimatsu

Kenji Essaki

Hiroshi Tateishi

Sawako Yoshikawa

Masahiro Kato

Toshiyuki Ohashi

Masaaki Tamatani

Shigeru Ando

Kazuya Yamada

Kiyoshi Imai

Hidetsugu Fujii

Akira Taya

Kenji Terashima

Hidenori Ito

Yoji Yuge

Keiji Murata

Akiko Watanabe

Kato Masahiro

Yoshikazu Hagiwara

Hideyuki Ozu

Mitsutoshi Hamamura

Yasuhito Sakakibara

A method of regenerating a carbon dioxide gas absorbent includes heating a carbon dioxide gas absorbent containing lithium silicate, which has been absorbed a carbon dioxide gas, under a reduced pressure atmosphere to release the carbon dioxide gas.

Method of regenerating carbon dioxide gas absorbent

A fuel reforming method includes the step of supplying carbon-containing fuel and steam to a reactor filled with a fuel reforming catalyst and a COabsorbent and discharging CO, and setting the absorbent at an absorption temperature, thereby converting the carbon-containing fuel into reformed fuel, and separating COfrom the reformed fuel, the step of obtaining a product gas by oxidizing a portion of the reformed fuel and/or the carbon-containing fuel with an oxidizer, and heating the absorbent with this product gas to a regeneration temperature, thereby regenerating the absorbent and storing heat in this absorbent, and the step of supplying the carbon-containing fuel and steam to the reactor, thereby cooling, to the absorption temperature, the absorbent heated to the regeneration temperature, and converting the carbon-containing fuel into reformed fuel by heat energy stored in the COabsorbent. An apparatus for the method is also disclosed.

Fuel reforming method and system

A fire extinguishing agent contains at least one compound selected from the group consisting of an alkali hydrogencarbonate and an alkali carbonate, the alkali hydrogencarbonate being thermally decomposed to generate carbon dioxide and an alkali carbonate, a metal oxide that reacts with the alkali carbonate to generate carbon dioxide, and a hydrophobic binder.

Fire extinguishing agent and fire extinguisher

There is disclosed a carbon dioxide gas absorbent comprising lithium silicate, 0.5 mol % to 4.9 mol % of alkali carbonate per mole of the lithium silicate, and at least one element selected from the group consisting of aluminum, magnesium, calcium, iron, titanium and carbon.

Carbon dioxide gas absorbent and carbon dioxide gas separating apparatus

Disclosed is a carbon dioxide gas absorbent containing lithium silicate reacting with a carbon dioxide gas to form lithium carbonate and represented by the general formula, Li Si O , where x, y, z are integers meeting the requirement of x&plus;4y&minus;2z&equals;0. The lithium content x in the general formula should desirably be at least 4.

Carbon dioxide gas absorbent containing lithium silicate

A binder layer is formed on a surface of ceramic powder. This ceramic powder is formed into a sheet to form a sheet for an electrolyte plate of a molten carbonate fuel cell, to which a carbonate electrolyte is impregnated, thereby an electrolyte plate is constituted.

Molten carbonate fuel cell

The carbon dioxide gas absorbent of the present invention exhibits a high carbon dioxide gas absorption performance from an initial stage of the use. The carbon dioxide gas absorbent comprises of primary particles each containing lithium zirconia serving as a matrix, and eutectic compound molecules each containing lithium carbonate and at least one element selected from the group consisting of alkali metals excluding lithium, and alkali earth metals, which are dispersed in the matrix.

Method for manufacturing a carbon dioxide gas absorbent

A molten carbonate fuel cell comprises a fuel electrode, an oxidizing agent electrode, and an electrolyte body prepared by impregnating a porous body including a retaining material and a reinforcing material with an electrolyte containing an alkali carbonate. The retaining material consists essentially of .alpha.-lithium aluminate (.alpha.-LiAlO.sub.2) having at most 0.60.degree. of a half value width of (104) peak in an X-ray powder diffractometry.

Molten carbonate fuel cell and method of manufacturing retaining

The chemical reaction apparatus of the present invention can increase the producing rate of the main product gas by effectively removing carbon dioxide from the reaction site, the carbon dioxide generated together with the main product as the raw material gas is made to react at a high temperature of 400.degree. C. The reaction apparatus comprises a reactor for generating a main product gas and a byproduct gas which is carbon dioxide, by making a raw material gas to react, and lithium zirconate granular material placed in the reactor, to react with the byproduct carbon dioxide gas, thereby preparing a carbonate salt.

Chemical reaction apparatus and method of collecting main product gas

A molten carbonate fuel cell of high performance and long life, which is capable of preventing the corrosion at the contacting portion between collector plates (in particular, an oxidizing gas-side collector plate) and the interconnector so as to suppress an increase of contact resistance. This molten carbonate fuel cell comprises, a unit cell comprising an electrolyte body formed of a porous body impregnated therein with a mixed carbonate containing two or more kinds of carbonate mixed in a desired mixing ratio, a cathode disposed on one main surface of the electrolyte body, and an anode disposed on the other main surface of the electrolyte body, corrugated collector plates, each disposed on a surface of the anode and on a surface of the cathode, and interconnectors, each disposed on a surface of each of the collector plates, wherein a substance which is capable of reacting with the mixed carbonate at an operation temperature of the fuel cell thereby to change a composition ratio of the mixed carbonate is deposited on a surface of at least one member selected from the collector plate and the interconnector.

A method is disclosed for selectively separating carbon dioxide gas by contacting the carbon dioxide containing gas with a composition containing lithium zirconia at a temperature of 450.degree. C. or more so that carbon dioxide reacts with the lithium zirconia to produce lithium carbonate and zirconia. Subjecting the lithium carbonate and zirconia to a temperature of 600.degree. C. or more so as to produce lithium zirconia and carbon dioxide.

Method for separation of carbon dioxide gas

There is proposed a molten carbonate fuel cell of high performance and long life which is provided with an oxidizing gas side-collector plate having on its surface a non-stoichiometric composite oxide layer excellent in electric conductivity and corrosion resistance, and hardly attracting electrolyte. This molter carbonate fuel cell comprises a unit cell comprising an electrolyte body formed of a porous body impregnated therein with a carbonate, a cathode disposed on one main surface of the electrolyte body, and an anode disposed on the other main surface of the electrolyte body, corrugated collector plates, disposed alternatively on a surface of the anode and on a surface of the cathode, and interconnectors, each being disposed on a surface of each of the collector plates, wherein the collector plate disposed on the cathode comprises a main body made of austenitic stainless steel, an Fe-Cr-Ni alloy layer covering a surface of the main body and consisting of 23 to 45 wt % of Fe, 12 to 27 wt % of Cr, the balance of Ni and not more than 1 wt % of unavoidable impurities, and a nickel-ferrite-based non-stoichiometric composite oxide layer formed on a surface of the Fe-Cr-Ni alloy layer.

Disclosed is a molten carbonate fuel cell comprising an electrolyte body sandwiched between a pair of electrodes, outflow of an electrolyte from the electrolyte body being diminished to suppress an increase of the internal resistance and occurrence of a gas crossover, which accompany the outflow of the electrolyte, so as to increase the life time of the fuel cell. The molten carbonate fuel cell of the present invention comprises a pair of conductive electrodes, an electrolyte body sandwiched between the pair of electrodes and including a porous body containing a retaining material and a reinforcing material and an electrolyte impregnated in the porous body and containing an alkali carbonate mixture, the retaining material containing fine particles having an average particle diameter of 0.2 to 0.6 .mu.m and the reinforcing material containing short fibers having a diameter of 0.5 to 5 .mu.m and a length of at most 50 .mu.m, fuel gas supplying means for supplying a fuel gas to one of the pair of electrodes, and oxidant gas supplying means for supplying an oxidant gas to the other of the pair of electrodes.

Disclosed is a stainless steel member with a high corrosion resistance suitable for a structural member used in highly corrosive environments, such as an edge seal plate of a molten carbonate fuel cell. This stainless steel member includes a base material consisting of stainless steel containing chromium, and a corrosion-protective layer formed on the surface of the base material. In this corrosion-protective layer, a granular heterophase containing chromium is precipitated in an ordered alloy consisting of aluminum and the constituent elements of the base material.

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Yokohama, Japan

Kazuaki Nakagawa