De Nora Permelec Ltd

Yokohama National University

Kawasaki Jukogyo Kabushiki Kaisha

Chlorine Engineers Corp., Ltd.

Industrie De Nora S.p.a.

Thyssenkrupp Uhde Chlorine Engineers (japan) Ltd.

Thyssenkruppp Uhde Chlorine Engineers (japan) Ltd.

Thyssenkrupp Uhde Chlorine Engineers Gmbh

Akiyoshi Manabe

Yoshinori Nishiki

Akihiro Kato

Shigenori Mitsushima

Masahiro Ohara

Yasutomo Takakuwa

Yasushi Sato

Yuji Kamei

Akira Kunimatsu

Masaaki Kato

Setsuro Ogata

Shinji Oshima

Awaludin Zaenal

Ikuo Nagashima

Kenzo Yamaguchi

Koji Matsuoka

Kota Miyoshi

Kojiro Nakagawa

Takafumi Ito

Terumi Hashimoto

Hiroki Domon

Fumiya Tsujii

Katsuhisa Harada

Kensaku Nagasawa

Koji Kawanishi

Yoshinari Take

Ikuo Shimomura

Takehiro Oiwa

Tsuneo Tokumori

Tetsuro Yamashita

Kenichiro Igashira

Masakazu Mimura

Kazumasa Mochizuki

Sho Fujita

Nanase Ishikawa

Yoko Sumida

Disclosed is a purification method of electrolytic gas generated from an electrolysis cell having a cathode and an anode. In a step of performing electrolysis of an electrolyte solution supplied into the electrolysis cell and repeating the electrolysis while circulating the electrolyzed electrolyte solution via an circulation tank disposed outside the electrolysis cell, a bag-shaped membrane pack, which is made from a specific porous membrane material, is of a shape having an opening at a top end thereof and closed at an entire side wall and entire bottom wall thereof and has a large permeation area at the entire side wall and entire bottom wall, is disposed in an interior of the circulation tank, thereby enabling to perform the electrolysis while purifying the electrolyte solution in which a portion of the electrolytic gas generated by the electrolysis is dissolved and bubbles of another portion of the electrolytic gas coexist.

Method for purifying gas formed by electrolysis, and electrolytic apparatus

There are provided an electrolyzer gasket, which can accommodate and hold a separator inside an electrolyzer by a simple handling, can more surely prevent leakage of an electrolyte and an electrolytically generated gas from the inside of the electrolyzer, can keep the separator in such a state that the separator is held at a position that is in contact with one of electrodes and is located along the electrode and therefore can suppress damage of the separator and makes it possible to use the separator stably for a long period of time, and an electrolyzer. An electrolyzer gasket including a picture-frame-shaped thin-plate-like frame having a first surface being in contact with an anode metal frame and a second surface being in contact with a cathode metal frame, wherein the gasket has a structure in which a notch having a difference in level of approximately the same thickness as the thickness of the separator, the notch obtained by thinly scraping off, in a uniform thickness, a region including the edge on the anode chamber side or the cathode chamber side, is formed on any one of the first surface and the second surface, and the edge part of the separator is accommodated and held in the notch, and an electrolyzer using the electrolyzer gasket.

Gasket for electrolysis vessels, and electrolysis vessel using same

An organic hydride production apparatus includes: an electrolyte membrane having proton conductivity; a cathode that includes a cathode catalyst layer used to hydrogenate a hydrogenation target substance using protons to produce an organic hydride and also includes a cathode chamber; an anode that includes an anode catalyst layer used to oxidize water to produce protons and also includes an anode chamber; and a gas introduction unit that introduces, into the anolyte at a certain position, a certain gas used to remove at least one of the hydrogenation target substance and the organic hydride that have passed through the electrolyte membrane and been mixed into the anolyte.

Organic hydride production apparatus and method for producing organic hydride

Provided is an electrolytic apparatus capable of pressurizing hydrogen gas produced by the electrolytic apparatus and removing impurities in the produced hydrogen gas. In the electrolytic apparatus, gas compression meansincluding an ejector, a storage tankstoring a circulation liquid, a circulation pipecirculating a fluid mixture of hydrogen gas and the circulation liquid to the ejector, and a circulation pumpis provided in a discharge linefor hydrogen gas produced by electrolysis, a hydrogen gas discharge pipeand a first valve Vare provided in the storage tank, impurities in the hydrogen gas are transferred to the circulation liquid to remove the impurities from the hydrogen gas, and a pressure of the hydrogen gas stored in the storage tankis raised by controlling a flow rate of the circulation liquid circulated from the storage tankto the ejectorand opening and closing of the first valve V

Electrolytic device

Provided is an alkaline water electrolyzer in which leakage of aqueous alkali solutions is prevented. The alkaline water electrolyzerincludes an anode chamber framedefining an anode chamber; a cathode chamber framedefining a cathode chamber; a porous diaphragmdisposed between the anode and cathode chamber framesandand partitioning the anode and cathode chambersand; an anode gasketdisposed on the anode chamber frame; and a cathode gasketdisposed on the cathode chamber frame, wherein when the anode and cathode chamber framesandare fastened, the porous diaphragmis held between the anode and cathode chamber framesandvia the anode and cathode gasketsandand the anode and cathode gasketsandare in contact with each other around the peripheral edge of the porous diaphragmby compressing the anode and cathode gasketsand

Alkaline water electrolysis device

To provide an electrolysis cell for producing an organic chemical hydride capable of advancing a reduction reaction in a cathode of an organic compound having an unsaturated bond with high current efficiency and a small electric power consumption unit. An electrolysis cellfor producing an organic chemical hydride includes a solid polymer electrolyte filmwhich has proton conductivity; a cathodewhich is provided on one surface of the solid polymer electrolyte filmand generates a hydride by reducing a substance to be hydrogenated; a cathode chamberwhich accommodates the cathodeand to which the substance to be hydrogenated is supplied; an electrode catalyst-containing anodewhich is provided on another surface of the solid polymer electrolyte filmand generates a proton by oxidizing water; and an anode chamberwhich accommodates the anodeand to which an electrolytic solution is supplied, in which at least one of a surface of the cathodeside and a surface of the anodeside of the solid polymer electrolyte filmis hydrophilized.

Electrolytic cell for production of organic chemical hydrides

An organic hydride production apparatus that enables the reduction reaction at the cathode of an organic compound having an unsaturated bond to proceed at high current efficiency and at a low electric power consumption rate, and a method for producing an organic hydride that uses this production apparatus. The production apparatus includes a solid polymer electrolyte membrane having proton conductivity, a cathode which is provided on one surface of the solid polymer electrolyte membrane and generates a hydride by reducing a substance to be hydrogenated, a cathode chamber which houses the cathode and is supplied with the substance to be hydrogenated, an electrode catalyst-containing anode which is provided on the other surface of the solid polymer electrolyte membrane and generates protons by oxidizing water, and an anode chamber which houses the anode and is supplied with an electrolytic solution, wherein the substance to be hydrogenated is supplied from the lower end of the cathode chamber, the production apparatus has a hydride outlet through which the product and the like is discharged from the upper end of the cathode chamber, and at least one partition with a width of not less than 0.1 mm is formed inside the cathode camber.

Apparatus for producing organic hydride and method for producing organic hydride using same

A diaphragm includes a porous supporting body and a polymer porous membrane. When one of surfaces of the porous membrane is defined as a surface A, the other surface opposite to the surface A is defined as a surface B, a section of the porous membrane parallel to the surfaces A and B is defined as a section C, an average pore diameter on the surface A is defined as an average pore diameter D, an average pore diameter on the surface B is defined as an average pore diameter D, and an average pore diameter on the section C is defined as an average pore diameter D, the average pore diameters Dand Dare substantially equal to each other, and the average pore diameter Dis larger than each of the average pore diameters Dand D.

Alkaline water electrolysis diaphragm and method of manufacturing same

Provided is a method capable of producing, in a simple and low-cost manner, an electrolysis electrode which can be used in alkaline water electrolysis and has superior durability against output variation. The method for producing an anode for alkaline water electrolysis includes: a step of dissolving lithium nitrate and a nickel carboxylate in water to prepare an aqueous solution containing lithium ions and nickel ions, a step of applying the aqueous solution to the surface of a conductive substrate having at least the surface composed of nickel or a nickel-based alloy, and a step of subjecting the conductive substrate to which the aqueous solution has been applied to a heat treatment at a temperature within a range from at least 450&#xb0; C. to not more than 600&#xb0; C., thereby forming a catalyst layer composed of a lithium-containing nickel oxide on the conductive substrate.

Method for producing anode for alkaline water electrolysis, and anode for alkaline water electrolysis

Provided is an alkaline water electrolysis method capable of reducing or preventing degradation in cathode and anode performance even in an operation of repeated cycles of frequent starting and stopping, and/or even in an operation involving a significant output variation. The present invention provides an alkaline water electrolysis method including repeated cycles of intermittent operation, including an electrolysis step of performing alkaline water electrolysis including storing an electrolytic solution () in a circulation tank (), feeding the electrolytic solution () in the circulation tank () to an anode chamber () and to a cathode chamber (), returning an electrolytic solution generated in the cathode chamber () and an electrolytic solution generated in the anode chamber () to the circulation tank (), mixing together these electrolytic solutions in the circulation tank (), and recirculating the mixed electrolytic solution to the anode chamber () and to the cathode chamber (), and a step of adding a catalyst activation material formed of a metal salt soluble in the electrolytic solution () prior to starting of the electrolysis step; and in the electrolysis step, a metal component in the catalyst activation material is deposited on a surface of the cathode.

Method for electrolyzing alkaline water

Provided is a water treatment system using an alkaline water electrolytic device and an alkaline fuel cell in which for continuing an electrolytic treatment, a hydrogen gas and an oxygen gas required in an alkaline water electrolytic device and an alkaline fuel cell, an amount of water corresponding to raw water lost through the electrolytic treatment, and an electrolytic solution are efficiently circulated and used in a water treatment system to considerably reduce electric power consumption. The water treatment system is a water treatment system using an alkaline water electrolytic device and an alkaline fuel cell in which an alkaline water electrolytic device and an alkaline fuel cell are connected to each other, the volume of raw water is reduced, an oxygen gas and a hydrogen gas that are generated from the alkaline water electrolytic device are fed to the alkaline fuel cell, the oxygen gas and hydrogen gas are used to generate electric power by the alkaline fuel cell, electric energy and water are collected, and the collected electric energy is fed to the alkaline water electrolytic device as an electric power source thereof.

Water treatment system using alkaline water electrolysis device and alkaline fuel cell

To provide an electrolytic apparatus and an electrolytic method which can remove a risk of reaching an explosion limit of hydrogen by gradual accumulation of a very small amount of gas in a circulation line of an electrolytic solution in an electrolytic process generating hydrogen. The electrolytic apparatusis characterized by including an anode gas feeding lineconnecting a gas phase regionto an anode side gas-liquid separation means in order to dilute the concentration of the hydrogen gas by feeding anode gas into the gas phase regionin which hydrogen gas can exist as a gas phase. By feeding at least a part of the anode gas to the gas phase regionwith the anode gas feeding line, the hydrogen gas in the gas phase regionis diluted with the anode gas so that the concentration of the hydrogen gas is surely less than a lower limit value of explosion limit.

Electrolysis apparatus and electrolysis method

A device for producing an organic hydrideof an aspect of the present invention has an electrochemical cell provided with an anodeon a surface of an electrolyte membraneand a cathode including a cathode catalyst layerand a cathode diffusion layeron another surface of the electrolyte membrane. A gap is provided between the anodeand the electrolyte membrane. The anodehas a network structure with an aperture ratio of 30 to 70%, and has an electrical supply supporting material formed of an electronic conductor and the electrode catalyst held by the electrical supply supporting material.

Device for manufacturing organic hydride

An electrolytic enrichment method for heavy water includes enriching heavy water by electrolysis using an alkaline water electrolysis cell including an anode chamber that holds an anode, a cathode chamber that holds a cathode, and a diaphragm. In the method, an electrolyte prepared by adding high-concentration alkaline water to raw material water containing heavy water is circularly supplied to the anode chamber and the cathode chamber from a circulation tank; an anode-side gas-liquid separator and an anode-side water-seal device are connected to the anode chamber, and a cathode-side gas-liquid separator and a cathode-side water-seal device are connected to the cathode chamber; and electrolysis is continued while the alkali concentration in the electrolyte supplied to both electrolysis chambers is maintained at a constant concentration by circularly supplying, to the circulation tank, the electrolyte from which the gas generated from the anode-side gas-liquid separator and the cathode-side gas-liquid separator is separated.

Electrolytic enrichment method for heavy water

The present invention relates to a method for treating tritium water-containing raw water, the method including supplying a part of raw water containing tritium water and alkali water to a circulation tank, mixing the raw water with alkali water in the circulation tank to obtain an electrolyte adjusted so as to have a desired alkali concentration, and continuously electrolyzing the electrolyte while circulating the electrolyte, thereby subjecting the raw water stored in the storage tank to alkali water electrolysis and thus gasifying the raw water. According to the invention, by gasifying tritium water-containing raw water by alkali water electrolysis, the tritium concentration in a tritium-containing hydrogen gas is diluted to 1/1,244 and the tritium water-containing raw water can be reduced in volume.

Growing community of inventors

Fujisawa, Japan

Akiyoshi Manabe