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Helmholtz-zentrum Geesthacht Zentrum Fur Material Und Kustenforschung Gmbh

Gfe Metalle Und Materialien Gmbh

Helmut-Schmidt-Universität

Thomas Klassen

Martin Dornheim

Klaus Taube

José M Bellosta Von Colbe

Julián Puszkiel

Julian Jepsen

Peter Heinrich

Frank Gärtner

Werner Krömmer

Holger Stühff

Heinrich Kreye

Dieter Platzek

Volker G&uuml;ther

R&uuml;diger Bormann

Giovanni Capurso

Rüdiger Bormann

Henning Zoz

Wolfgang Oelerich

Andreas Otto

Volker Güther

Jan-Oliver Kliemann

Henning Gutzmann

Gagik Barkhordarian

Claudio Pistidda

Anna Kallias

Ignasi Cabezas Marce

Anton Nijkamp

Frank Gaertner

Kurt Binder

Norbert Németh

Alexander List

Hamid Assadi

Thi Thu Le

Uz Baumgart

Motohiro Yamada

Robert Schulz

Jacques Huot

Hans Ulrich Benz

Klaus Horst Taube

Lukas Fleming

Julián Atilio Puszkiel

Volker Guther

Ruediger Bormann

A cold start device for an exothermic hydrogen consumer such as a fuel cell, as well as a method for operating an exothermic hydrogen consumer with a metal hydride storage system. An exothermic hydrogen consumer such as a fuel cell with an efficient cold start device which can be brought into operation rapidly and. does not require a pressure tank is provided. The cold start device is available for an unlimited number of start-up procedures. At least one starter tank is filled with a metal hydride which has an equilibrium pressure for desorption of at least 100 kPa at a temperature of −40° C., as well as at least one operating tank which is filled with at least one metal hydride, which has an equilibrium pressure of <100 kPa at temperatures of <0° C., and wherein the starter tank is incorporated into the operating tank.

Metal hydride-hydrogen tank system with a frost-start capability

A method for manufacturing tanks for storing or containing a fluid under pressure and a method for manufacturing pipes for containing or channeling a fluid under pressure, such as for storing, containing or channeling hydrogen, natural gas or a hydraulic fluid. The method is less complex than known procedures, can be employed in a continuous or semi-continuous manner and allows for a lower thickness of the shell made from the fibres. The method comprising providing a liner having a cylindrical portion with two ends and two dome portions at the respective ends of the cylindrical portions or a liner having a cylindrical portion and one or two open ends; fabricating a tube of fibre filaments by means of the pullwinding method; and wrapping the tube of fibre filaments onto the liner such that at least the cylindrical portion of the liner is enclosed by the tube of fibre filaments.

Method for manufacturing high-pressure tanks

The present invention relates to a composite material for hydrogen storage based on metal hydrides and to a method of operating a hydrogen storage system based on metal hydrides capable of releasing and absorbing hydrogen. Such hydrogen storage systems based on metal hydrides may be applicable as a fuel source for a fuel cell. The composite material for hydrogen storage comprises a powder or pellets of a hydride and a phase changing material (PCM), wherein the PCM is an encapsulated phase changing material (EPCM) which is homogeneously dispersed within the powder or pellets of the hydride.

Integrated material and process for integrated operation of a hydride storage system

The invention relates to a cold start apparatus for an exothermic hydrogen consumer such as a fuel cell and also a method for operating an exothermic hydrogen consumer having a metal hydride store or hydrogen supply from a reformer. It is an object of the present invention to provide a fuel cell having an efficient cold start apparatus, which can be taken into operation immediately and does not require any pressure tank. Furthermore, the cold start apparatus should be available for an unlimited number of starting operations. The object is achieved by an apparatus for operation of a fuel cell or another exothermic hydrogen consumer, which comprises at least one starter tank comprising a metal hydride having cold start properties and also at least one operating tank comprising at least one intermediate-temperature hydride or at least one reformer, wherein the starter tank is in fluidic communication with the exothermic hydrogen consumer and the operating tank or the reformer, wherein the first starter tank comprises a metal hydride which has an equilibrium pressure for desorption at a temperature of &#x2212;40&#xb0; C. of at least 100 kPa and further comprises a cooling device in order to be able to be reloaded with hydrogen by the operating tank or the reformer while the fuel cell is being supplied.

Apparatus comprising a metal hydride store for operating an exothermic hydrogen consumer

The present invention relates to a method for producing tetrahydridoborate salts with high efficiency at low cost. The method for the production of metal borohydride salts according to the present invention comprises the steps of providing an anhydrous metal borate salt and milling the anhydrous metal borate salt in the presence of a metal material based on magnesium or magnesium alloys in a hydrogen atmosphere at a temperature and for a time sufficient to produce the metal borohydride salt. In another embodiment of the invention, the method for the production of metal borohydride salts according to the present invention comprises the steps of providing an hydrated metal borate salt and milling the hydrated metal borate salt in the presence of a metal material based on magnesium or magnesium alloys in an inert gas atmosphere at a temperature and for a time sufficient to produce the metal borohydride salts. In a still further embodiment of the invention, the metal material based on magnesium or magnesium alloys is a secondary magnesium material, preferably a Class 2, Class 3, or Class 6 secondary magnesium material.

Method for producing borohydride salts

The invention relates to a gas circulation system () for transporting heat from a high-temperature source () to a heat consumer (), having a pipe system (), through which a gaseous heat transfer medium flows, wherein part of the pipe system () is formed as a heat exchanger () following on from the high-temperature source (), in which heat is transferred from the high-temperature source () into the heat transfer medium, and wherein part of the pipe system () is formed as a heat sink (), in which the heat transferred to the heat transfer medium can be transferred to a heat consumer (), or as a heat consumer. One or more gas flow enhancers () functioning according to the Coand&#x103; effect and/or the Venturi effect, which are supplied with pressurized impulse gas, are provided in the pipe system (), in order to propel the heat transfer medium in the pipe system () in a flow direction ().

Gas circulation system for transporting heat from a high temperature source

The present invention relates to a system and method for the efficient heat management of a low-temperature fuel cell which is supplied from a metal hydride store. The system of the invention makes it possible to achieve, for example, discharge temperatures of the metal hydride store of about 180&#xb0; C. in the case of low-temperature fuel cells operated at about 85&#xb0; C.

System and method for heat management of high-temperature systems

A method for the photocatalytically active coating of surfaces is presented and described, as well as an article () photocatalytically actively coated according to this method. The object of providing a method for the photocatalytically active coating of, in particular, metallic surfaces, whereby a permanently stable coating is produced without negatively affecting the photocatalytic activity of the layer, is achieved by a method, in which a substrate article is prepared which has a surface, a metallic adhesion-promoting layer is applied to the surface of the substrate article, a photocatalytically active layer consisting of one or more metal oxides is applied to the adhesion-promoting layer, wherein the metallic adhesion-promoting layer and the surface of the substrate article consist of a different material and the adhesion-promoting layer is selected such that it is not oxidized or reduced by the photocatalytically active layer.

Method for the photocatalytically active coating of surfaces

The invention relates to a method for cold gas spraying in which a spray powder containing photocatalytically active spray particles is accelerated by means of a carrier gas in a nozzle and forms a coating upon striking a substrate. According to the invention, the method is characterized in that at least one part of the photocatalytically active spray particles consists of nanocrystalline agglomerates having a porosity of 200 to 800 m/g, the porosity being determined by means of a BHT measurement with nitrogen. Coatings produced with the method according to the invention and objects having such a coating are also claimed.

Method for cold gas spraying

An apparatus and methods for cold spraying with a spraying unit, a particle supply, a gas supply, and at least one heating unit. The heating unit contains a graphite felt that can be heated with an electric heater current, through which a gas stream can flow, wherein the at least one heating unit is arranged separately and/or in a pressure tank through which the gas stream can flow.

Method and apparatus for thermal spraying

A method for manufacturing diamond or diamond-like carbon (DLC) by converting at least one other form of carbon such as graphite, amorphous carbon, fullerenes, glass carbon, graphene, carbon foam or a mixture of these forms. This method comprises an acceleration of particles and causing them to collide with a substrate. The particles and/or the substrate contain(s) or consist(s) of one other form of carbon. The conversion is induced by impact of the particles with the substrate, wherein cold gas spraying is used to advantage.

Method for manufacturing diamond

The invention relates to a metal-containing, hydrogen-storing material which contains a catalyst for the purpose of hydration or dehydration, said catalyst being a metal carbonate. The method for producing such a metal-containing, hydrogen-storing material is characterized by subjecting the metal-containing material and/or the catalyst in the form of a metal carbonate to a mechanical milling process.

Metalliferous, hydrogen-storing material and process for its production

The present invention relates to a gas tight storage and/or transport tank for low molecular filling media, in particular for hydrogen, with a tank wall which comprises a thermoplastic polymer and at least one diffusion barrier. The diffusion barrier comprises a metal hydride.

Gas tight vessel with a diffusion barrier layer of metal hydrides

In a metalliferous storage material for hydrogen a metal oxide is provided in or on the surface of the metalliferous materialas a catalyst for the hydrogenation or dehydrogenation of the metalliferous storage material.

Metalliferous storage material for hydrogen and method for producing same

In a process of producing nanocrystalline metal hydrides, an elemental metal hydride of a first kind is subjected to a mechanical milling process with at least one elemental metal or at least one additional metal hydride to produce an alloy hydride.

Process for manufacturing nanocrystalline metal hydrides

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Wentorf, Germany

Thomas Klassen