68 results about "Hydrogen transport" patented technology

A method for separating a hydrogen-rich product stream from a feed stream comprising hydrogen and at least one carbon-containing gas, comprising feeding the feed stream, at an inlet pressure greater than atmospheric pressure and a temperature greater than 200° C., to a hydrogen separation membrane system comprising a membrane that is selectively permeable to hydrogen, and producing a hydrogen-rich permeate product stream on the permeate side of the membrane and a carbon dioxide-rich product raffinate stream on the raffinate side of the membrane. A method for separating a hydrogen-rich product stream from a feed stream comprising hydrogen and at least one carbon-containing gas, comprising feeding the feed stream, at an inlet pressure greater than atmospheric pressure and a temperature greater than 200° C., to an integrated water gas shift/hydrogen separation membrane system wherein the hydrogen separation membrane system comprises a membrane that is selectively permeable to hydrogen, and producing a hydrogen-rich permeate product stream on the permeate side of the membrane and a carbon dioxide-rich product raffinate stream on the raffinate side of the membrane. A method for pretreating a membrane, comprising: heating the membrane to a desired operating temperature and desired feed pressure in a flow of inert gas for a sufficient time to cause the membrane to mechanically deform; decreasing the feed pressure to approximately ambient pressure; and optionally, flowing an oxidizing agent across the membrane before, during, or after deformation of the membrane. A method of supporting a hydrogen separation membrane system comprising selecting a hydrogen separation membrane system comprising one or more catalyst outer layers deposited on a hydrogen transport membrane layer and sealing the hydrogen separation membrane system to a porous support.

Composite hydrogen transport membranes, which are used for extraction of hydrogen from gas mixtures are provided. Methods are described for supporting metals and metal alloys which have high hydrogen permeability, but which are either too thin to be self supporting, too weak to resist differential pressures across the membrane, or which become embrittled by hydrogen. Support materials are chosen to be lattice matched to the metals and metal alloys. Preferred metals with high permeability for hydrogen include vanadium, niobium, tantalum, zirconium, palladium, and alloys thereof. Hydrogen-permeable membranes include those in which the pores of a porous support matrix are blocked by hydrogen-permeable metals and metal alloys, those in which the pores of a porous metal matrix are blocked with materials which make the membrane impervious to gases other than hydrogen, and cermets fabricated by sintering powders of metals with powders of lattice-matched ceramic.

Composite hydrogen transport membranes used for extraction of hydrogen from gas mixtures are provided. Membranes are described comprising metals and metal alloys which exhibit high hydrogen permeability and which exhibit resistance to differential pressures across the membrane and wherein the metals and alloys are protected from embrittlement by hydrogen. Support materials of the membranes are selected in some cases to be lattice matched to the metals and alloys. In specific embodiments, membranes useful in the invention contain binary, ternary or quaternary alloys of vanadium which exhibit high hydrogen permeability and improved strength and/or longevity in application.

The present invention relates to the use of low pressure N2 from an air separation unit (ASU) for use as a sweep gas in a hydrogen transport membrane (HTM) to increase syngas H2 recovery and make a near-atmospheric pressure (less than or equal to about 25 psia) fuel for supplemental firing in the heat recovery steam generator (HRSG) duct burner.

The invention discloses an electric methanol hydrogen transporting tool. The tool comprises a methanol-to-hydrogen system, a hydrogen generating system and an electric engine, wherein the methanol-to-hydrogen system, the hydrogen generating system and the electric engine are connected with each other in sequence. The methanol-to-hydrogen system is used for preparing hydrogen through methanol steam reforming; the hydrogen passes through a membrane separation device plated with a palladium silver alloy to obtain a high-purity hydrogen; the obtained hydrogen is used for generating power through the hydrogen generating system; and the generated electric power is provided to the electric engine to work. The hydrogen generating system comprises a fuell cell, wherein the fuell cell comprises a plurality of sub fuel cell modules; and each sub fuel cell module comprises at least one super-capacitor. According to the electric methanol hydrogen transporting tool disclosed by the invention, the methanol can be used as energy for the transporting tool so that problems of energy crisis and vehicle emission are solved. The electric methanol hydrogen transporting tool disclosed by the invention is advantaged in that the volume of a hydrogen preparation device is small; the prepared hydrogen is rapid, stable and highly purified because the hydrogen is purified by using a special catalyst formula and a palladium membrane; and stable input energy can be provided to the transporting tool.

We disclose a device for the production of hydrogen from water using heat. The device employs thermal water splitting and works essentially without electricity. It is based on the concept of a membrane reactor with two kinds of membranes allowing the separation of hydrogen and oxygen simultaneously in stoichiometric quantities from the reactor volume. The device has a special geometry resulting in a temperature distribution inside the reaction chamber to accommodate the use of hydrogen selective membranes. The device will help to reduce the need for hydrogen transport and storage as it will be rather compact for on-site use in households, small factories or gas stations. The use of the device in mobile applications is conceivable. The heat source of the device as described is combustion of a hydrocarbon using porous burner technology; however the device can be modified to exploit any other heat source, especially solar radiation.

A method of forming a hydrogen transport membrane to separate hydrogen from a hydrogen containing feed in which a porous ceramic support is formed to support a dense layer of palladium or an alloy of palladium serving as a hydrogen transport material. Isolated deposits of palladium, a palladium alloy or a component of such alloy are produced on a surface of the porous ceramic support that bridge pores within the porous ceramic support without penetrating the pores and without bridging regions of the surface defined between the pores. The isolated deposits of the metal are produced by an electroless plating process that involves contacting the porous ceramic support with a precipitating agent so that the precipitating agent fills the pores but does not seep out of the pores onto the regions of the surfaces defined between the pores. The surface is then contacted with a salt solution containing a salt of the metal so that said metal precipitates and produces the isolated deposits of the metal. Thereafter, the dense layer is formed on the surface having the isolated deposits.

A system and method for producing carbon nanotubes by chemical vapor deposition includes a catalyst support having first and second surfaces. The catalyst support is capable of hydrogen transport from the first to the second surface. A catalyst is provided on the first surface of the catalyst support. The catalyst is selected to catalyze the chemical vapor deposition formation of carbon nanotubes. A fuel source is provided for supplying fuel to the catalyst.

The invention discloses a portable preparation method capable of immediately preparing hydrogen ionized water when being required, which is characterized in that a hydrogen storage alloy is filled in a hydrogen storage tank, hydrogen transport elements are prepared for the hydrogen storage tank in order to form a hydrogen ionized water preparation apparatus, the hydrogen transport elements comprise a vent valve, a connecting pipe and a seal joint, so that the hydrogen ionized water preparation apparatus and a drinking water container port are sealed and connected; a container with the port capable of cooperating with the seal joint of the hydrogen ionized water preparation apparatus is used for filling the drinking water, air in the drinking water container is evacuated, then the port of the drinking water container and the seal joint are sealed and connected; the vent valve of the hydrogen ionized water preparation apparatus is opened, and a proper amount of hydrogen is injected in drinking water in the container, then the vent valve is closed, the container is shaken, hydrogen is fully dissolved in water to generate saturated or supersaturated hydrogen ionized water which is the hydrogen ionized water capable of being immediately prepared and drunk. The invention also discloses an apparatus adapted to the method. The method is not restricted to environment and operation condition, the hydrogen ionized water is capable of being immediately prepared and drunk, and the method can develop health care and treatment effect of the hydrogen ionized water in a convenient and maximum degree.

The invention discloses a liquid hydrogen storage type hydrogen refueling station mixed filling system. The system comprises a 35 MPa hydrogen filling unit and a 70 MPa hydrogen filling unit which are connected with a liquid hydrogen storage tank, each of the two filling units comprises a liquid hydrogen pump communicating with the liquid hydrogen storage tank, a fluid separator for changing the flow direction and flow of hydrogen and a high-pressure vaporizer, the 35MPa hydrogen filling unit further comprises a 90MPa buffer bottle group, a 45MPa buffer bottle group and a first hydrogen filling machine, and the 70MPa hydrogen filling unit further comprises a second liquid hydrogen conveying pipe, a high-pressure hydrogen conveying pipe, a gas-liquid mixer and a second hydrogen adding machine. The system has the advantages that the hydrogen storage capacity is large, the energy consumption is low, and the filling requirements of different forms of hydrogen can be met.

The invention belongs to the field of offshore wind power, and particularly relates to a seawater hydrogen production conveying system and method based on an existing offshore wind power plant. The system comprises a wind driven generator, a seawater electrolytic tank device and a hydrogen conveying unit, wherein the wind driven generator is used for converting wind energy to electric energy, theseawater electrolytic tank device is used for electrolyzing seawater by utilizing electric energy supplied by the wind driven generator, and the hydrogen conveying unit is used for conveying hydrogenprepared by the seawater electrolytic tank device to the land. According to the seawater hydrogen production conveying system and method based on the existing offshore wind power plant, offshore windpower and seawater hydrogen production are combined, the resource advantages of an offshore wind power plant are fully utilized, the seawater hydrogen production cost is reduced, and finally coordinated development of offshore green wind energy and seawater hydrogen production is achieved.

A vacuum heat-insulating material includes: an outer cover material; and a core material which is sealed in a tightly closed and decompressed state on the inside of the outer cover material. Outer cover material has gas barrier properties and satisfies at least one of a condition that a linear expansion coefficient is 80×10⁻⁵/° C. or lower when a static load is 0.05 N within a temperature range of −130° C. to 80° C., inclusive, a condition that an average value of a linear expansion coefficient is 65×10⁻⁵/° C. or higher when a static load is 0.4 N within a temperature range of −140° C. to −130° C., inclusive, a condition that an average value of a linear expansion coefficient is 20×10⁻⁵/° C. or higher when a static load is 0.4 N within a temperature range of −140° C. to −110° C., inclusive, and a condition that an average value of a linear expansion coefficient is 13×10⁻⁵/° C. or higher when a static load is 0.4 N within a temperature range of +50° C. to +65° C., inclusive.

The invention provides a method for transforming dimethyl oxalate into ethylene glycol by a one-pot process under a hydrogen-free condition. The method comprises the following steps: (1) preparing a Cu-based catalyst, wherein the Cu-based catalyst comprises a reactive metal Cu and a carrier, a second metallic element is introduced into the Cu-based catalyst, the auxiliary metallic elements refer to alkali metal or/and alkaline-earth metal elements; the reactive metal Cu comprises Cu<+> and Cu0, and oxygen vacancy is enriched on the surface of the Cu-based catalyst; (2) weighing dimethyl oxalate, the Cu-based catalyst and a hydrogen-donor solvent, sequentially adding into a micro high-pressure reactor, filling N2, and reacting under the condition of 180-300 DEG C for 0.5-10 hours, thereby obtaining the ethylene glycol. According to the method disclosed by the invention, alcoholic hydrogen production and dimethyl oxalate hydrogenation reaction can be successfully coupled in the one-stepprocess, supply of exogenous hydrogen is not needed, equipment for performing hydrogenation conversion on the dimethyl oxalate to obtain ethylene glycol in the traditional process and hydrogen transport input can be greatly reduced, and the potential safety hazards in the production process are reduced.

The invention discloses a liquid hydrogen vacuum conveying pipe, and relates to the technical field of liquid hydrogen conveying tools. The conveying pipe comprises a flexible adapter pipe, and a vacuum interlayer is arranged on the pipe wall of the flexible adapter pipe. The problems that in the prior art, an existing hard transfer pipe is limited by the structure of the hard transfer pipe, a storage and transportation tank and a containing container are inconvenient to connect, operation wastes time and labor, and due to the fact that the low-temperature condition of liquid hydrogen cannot be guaranteed through the transfer pipe, the phenomenon that the liquid hydrogen is gasified in the conveying process is easily caused are solved.

Disclosed is a gas storage, preferably of hydrogen, and is in the form of a multi-capillary structure. The multi-capillary structure has a constant section over a certain length, which section then reduces sharply, down to a value at which the multi-capillaries become sufficiently flexible. The area of flexibility of the multi-capillaries has a length sufficient for the transportation of hydrogen to a fuel element. In this way, a flexible multi-capillary gas pipeline is created, which pipeline is integrated with a volume of stored hydrogen, the function of which pipeline is to supply hydrogen to the fuel element. The technical result consists of the provision of rapid priming of a micro-capillary vessel with high pressure gas and the regulated release of the gas from the vessel into a collector, where a moderate pressure (<1 MPa), required for operation of the fuel element, is maintained.

The present invention relates to a method of manufacturing a hydrogen transport membrane and the composite article itself. More specifically, the invention relates to producing a membrane substrate, wherein the ceramic substrate is coated with a metal oxide slurry, thereby eliminating the need for an activation step prior to plating the ceramic membrane through an electroless plating process. The invention also relates to modifying the pore size and porosity of the substrate by oxidation or reduction of the particles deposited by the metal oxide slurry