70 results about "Solid oxide electrolyser cell" patented technology

A process for converting carbon dioxide to hydrocarbon fuels using solar energy harnessed with a solar thermal power system to create thermal energy and electricity, using the thermal energy to heat a fuel feed stream, the heated fuel feed stream comprising carbon dioxide and water, the carbon dioxide captured from a flue gas stream, converting the carbon dioxide and water in a syngas production cell, the syngas production cell comprising a solid oxide electrolyte, to create carbon monoxide and hydrogen, and converting the carbon monoxide and hydrogen to hydrocarbon fuels in a catalytic reactor. In at least one embodiment, the syngas production cell is a solid oxide fuel cell. In at least one embodiment, the syngas production cell is a solid oxide electrolyzer cell.

The invention discloses a tri-cogeneration system and a tri-cogeneration method for generating power, producing hydrogen and producing fresh water by the aid of a high-temperature gas-cooled reactor of a nuclear power plant. The tri-cogeneration system comprises a closed helium circulating system of the nuclear power plant, a superheater, a steam generator, a raw seawater pipeline, a flash evaporator, a steam ejector, a seawater desalting device, a water feeding pump, a solid oxide electrolytic tank and an auxiliary steam pipeline. The tri-cogeneration system and the tri-cogeneration method have the advantages that the circulating system of the nuclear power plant, steam electrolysis and hydrogen production processes and distillation seawater desalination processes are coupled with one another, the power is generated by the aid of a helium gas turbine at first, waste heat of partial exhaust gas of the helium gas turbine is used for electrolyzing steam and producing the hydrogen, low-temperature waste heat cooling water of a cooler is used for carrying out distillation seawater desalination by means of coupled flash evaporation and steam injection, and accordingly diversified water, power and hydrogen tri-cogeneration modes can be implemented; the electric power and the fresh water which are required for steam electrolysis and hydrogen production can be provided by means of seawater desalination and nuclear power generation, accordingly, the tri-cogeneration system is high in circulating heat efficiency and good in adjustment performance and has a good economic benefit, the reliability of equipment can be improved, environmental pollution can be reduced, the tri-cogeneration system and the tri-cogeneration method have excellent application prospects, and the like.

A method for improving the efficiency and durability of reversible solid oxide cells during electrical energy storage is disclosed. The method utilizes a specific set of operating conditions that produces a storage chemistry where approximately thermal-neutral operation can be achieved at low cell over-potentials. Also disclosed are reversible solid oxide cell energy storage system configurations, including one that utilizes storage in natural gas and water storage/distribution networks, thereby reducing storage cost.

A process of producing a feed from a solid oxide electrolysis cell. A first portion of the flue gas produced from a combustion process is directed to the anode side of the solid oxide electrolysis cell. The feed and a second portion of the flue gas are then mixed to produce an enhanced feed. The enhanced feed is then mixed with fuel and combusted in the combustion process to produce flue gas. The flue gas comprises greater than 50 wt % CO₂ and less than 1 wt % N₂.

The invention provides a cathode material used for a solid oxide electrolytic cell and application of the cathode material. The chemical constitution of the cathode material is Sr2Fe1-xMxMoO6-Delta, wherein x is larger than or equal to 0 and smaller than or equal to 1; M is one or more selected from Mg, Zn, Ni, Co, Cu and Mn; an SrMoO3 phase is not contained in the cathode material. The cathode material does not comprise the SrMoO3 phase, adopts a single perovskite phase structure, can effectively solve the problem that the electrochemical performance of the Sr2Fe1-xMxMoO6-Delta is undesirable due to existence of the SrMoO3 phase, has favorable electrochemical performance, and can effectively improve hydrogen manufacturing efficiency of the solid oxide electrolytic cell.

The invention discloses a double-layer coating on the metal connector surface of a high-temperature solid oxide cell and a preparation method of the double-layer coating. The coating comprises a first coating facing the metal connector surface and a second coating facing the environment, wherein the first coating consists of a main-phase oxide spinel structure and a first-phase composite oxide; the second coating consists of a main-phase composite oxide and a second-phase composite oxide. The first coating of the double-layer coating is bonded to a metal connector well and densely; the diffusion of chromium to an SOFC (solid oxide fuel cell) cathode or an SOEC (solid oxide electrolyser cell) anode can be effectively prevented; the main-phase composite oxide powder in the second coating adopts a precursor, high-temperature sintering can be realized in an non-oxidizing atmosphere to avoid excessive oxidation of the metal connector; the second coating is bonded well with the first coating; the phasing of the main-phase oxide composite is realized at low temperature before the cell is operated; high electric conductivity is obtained, and meanwhile, high thermochemical compatibility and low contact resistance between the coating and the SOFC cathode or the SOEC anode are realized.

An electrolyzer cell is disclosed which includes a cathode to reduce an oxygen-containing molecule, such as H2O, CO₂, or a combination thereof, to produce an oxygen ion and a fuel molecule, such as H₂, CO, or a combination thereof. An electrolyte is coupled to the cathode to transport the oxygen ion to an anode. The anode is coupled to the electrolyte to receive the oxygen ion and produce oxygen gas therewith. In one embodiment, the anode may be fabricated to include an electron-conducting phase having a perovskite crystalline structure or structure similar thereto. This perovskite may have a chemical formula of substantially (Pr(_1-x)La_x)(z-y)A′_yBO(3-∂), wherein 0<x<1, 0≦y≦0.5, and 0.8 ≦z≦1.1. In another embodiment, the cathode includes an electron-conducting phase that contains nickel oxide intermixed with magnesium oxide.

A method for the operation of an SOEC stack reactor (Solid Oxide Electrolyser Cell), according to which, in the absence of electricity, synthesis gas H₂+CO or a mixture H₂+CO₂ is injected at the cathode inlet of the reactor in such a way as to produce methane inside the reactor. Since the catalytic methanation reaction is exothermic, the stack reactor can therefore be held at temperature, without loss of fuel. The fuel used for the methanation (synthesis gas or hydrogen) can advantageously be that which has been previously produced during the operating phases with available electricity.

A system for high-temperature reversible electrolysis of water, characterised in that it includes: a high-temperature reversible electrolyser, configured to operate in SOEC (solid oxide electrolyser cell) mode to produce hydrogen and store electricity, and/or in SOFC (solid oxide fuel cell) mode to withdraw hydrogen and produce electricity; a hydride tank, thermally coupled with the reversible electrolyser, the system being configured to allow the recovery of heat released by the hydride tank during hydrogen absorption in order to produce pressurised steam intended for entering the reversible electrolyser in SOEC mode, and to allow the recovery of heat released by the one or more outgoing streams from the reversible electrolyser in SOFC mode so as to allow the desorption of hydrogen from the hydride tank.

The invention belongs to the technical field of chemical engineering and particularly relates to a water vapor electrolytic process based system for joint production of ammonia and nitric acid. The system comprises a nitrogen generation unit, an ammonia synthesis unit, a nitric acid generation unit, and a solid oxide electrolyzer. The ammonia synthesis unit is used to provide the material ammonia and process vapor for the nitric acid generation unit, no ammonia is externally purchased for the nitric acid generation unit, meanwhile, a heat recovery boiler is eliminated. The reaction heat of the ammonia synthesis unit and the nitric acid generation unit is used to produce high temperature vapor, the high temperature vapor is applied to the solid oxide electrolyzer, the solid oxide electrolyzer produces hydrogen and oxygen, the hydrogen and the oxygen are applied to the ammonia synthesis unit and the nitric acid generation unit, so that a mode of joint production of ammonia and nitric acid by taking air and water as raw materials is achieved, no materials or fuels are externally purchased, only electric energy is used, so that the system has the characteristics of high integration, low production cost, single and convenient energy consumption, reasonable recovery of energy, less environment pollution, conformity to the international emission standard and the like, and has an excellent economic benefit and an excellent application prospect.

The invention discloses a solid oxide fuel cell and solid oxide electrolysis cell combined power generation system, which comprises a solid oxide fuel cell stack unit, a solid oxide electrolysis cell stack unit, a solar power supply device, a power converter, a fuel storage tank and corresponding inlet and outlet channels and flow control valves, a CO2 capture storage tank and corresponding inlet and outlet channels and flow control valves, a heat exchanger unit, an air exhaust bypass control valve, an air inlet control valve and an air compressor. By the solid oxide electrolysis cell stack unit, CO2 and H2O can be converted into fuel gases CH4, H2 and the like by externally supplied electric energy (for example, solar energy and the like) in a high-pressure environment, so that fuel exhaust and air exhaust discharged from a solid oxide fuel cell are introduced into an electrolysis cell; reaction is carried out by the solar power supply device to generate a new fuel gas; and the new fuel gas is introduced into a fuel cell stack again for power generation.

A sealing structure in a fuel cell and/or an electrolyzer (particularly a solid-oxide fuel cell and/or a solid-oxide electrolyzer) is arranged between neighboring separator plates of a cell stack. The sealing structure is constructed in at least two layers, including at least one insulating layer and at least one sealing layer.

The invention discloses a solar supercritical carbon dioxide cycle power generation and steam electrolysis hydrogen production coupled system comprising a compressor, a heat regenerator, a preheater, a high-concentration solar energy receiver, a steam superheater, a high-pressure carbon dioxide turbine, a reheater, a low-pressure carbon dioxide turbine, a generator, a cooler, a steam generator and a solid oxide electrolytic bath. The solar thermal power generation system adopts a supercritical carbon dioxide cycle and provides a high-temperature heat source and low-cost electricity for steam electrolysis hydrogen. Waste heat of steam electrolysis hydrogen production is recycled through the reheater and the preheater, so that the cycle thermal efficiency of the solar thermal power generation system is improved, and the grade of the thermal energy output by the solar thermal power generation system is improved. In addition, the gas flow entering the regenerator is reduced in a flow distributing manner, and the problem that the regenerator generates a heat exchange pinch point because the specific heat capacities of the fluid on the high-pressure side and the fluid on the low-pressure side are different is solved. The solar supercritical carbon dioxide cycle power generation and steam electrolysis hydrogen production coupled system has the advantages of being high in cycle thermal efficiency, high in energy utilization rate, low in hydrogen production cost and low in power generation cost.

Disclosed herein are a system and a method for the production of hydrogen. The system advantageously combines an independent high temperature heat source with a solid oxide electrolyzer cell and a heat exchanger located between the cathode inlet and the cathode outlet. The heat exchanger is used to extract heat from the molecular components such as hydrogen derived from the electrolysis. A portion of the hydrogen generated in the solid oxide electrolyzer cell is recombined with steam and recycled to the solid oxide electrolyzer cell. The oxygen generated on the anode side is swept with compressed air and used to drive a gas turbine that is in operative communication with a generator. Electricity generated by the generator is used to drive the electrolysis in the solid oxide electrolyzer cell.

A solid oxide cell (SOC) system composed of a solid oxide fuel cell (SOFC) and a solid oxide electrolysis cell (SOEC) produces water while generating power in an SOFC working mode, water reacts with a nanocrystalline metal on a carrier to produce hydrogen, and the hydrogen is supplied to the SOFC for working; and in an SOEC working mode, the water is electrolyzed by the electric energy from a solar wind energy cell to produce the hydrogen, the hydrogen reacts with the nanocrystalline metal on the carrier to produce water, and the water is supplied to the SOEC for electrolysis. As the metal and a metallic oxide are used as intermediate conversion material to recycle the fuel, so that the fuel does not need to be frequently injected, the purpose of continuous seal is achieved, and meanwhile the phenomenon that the fuel is loaded for multiple times to cause a lot of impurities to lead to damage to the cells is avoided.

The invention belongs to the field of high-temperature steam electrolysis hydrogen production, and particularly relates to a solid oxide electrolytic cell testing bracket. A design mode of combining a ceramic material and a stainless steel material is adopted in the testing bracket, a solid oxide electrolytic cell and a hydrogen electrode air chamber ceramic tube are sealed by using glass or glass-ceramic sealant in a high-temperature area, and a hydrogen electrode air chamber ceramic tube and a stainless steel sealing cutting sleeve are sealed by using silicon rubber sealant in a low-temperature area; the solid oxide electrolytic cell is arranged on the end face of the hydrogen electrode air chamber ceramic tube and fixed by using a pull lead to ensure that the electrode of the electrolytic cell is tightly contacted with a collector net; a hydrogen electrode collector net lead passes out of a glass sealing ring to avoid hydrogen brittleness; and a thermocouple is arranged in an air inlet tube to monitor the working temperature of the electrolytic cell. The testing bracket solves the problems of sealing of the electrolytic cell in the high-temperature area and transition sealing from the electrolytic cell to an air path system, can run stably for a long term under a high-temperature and high-humidity environment, and has the advantages of simple assembly, convenience for operation, good sealing performance and the like.

An individual solid oxide cell (SOC) constructed of a sandwich configuration including in the following order: an oxygen electrode, a solid oxide electrolyte, a fuel electrode, a fuel manifold, and at least one layer of mesh. In one embodiment, the mesh supports a reforming catalyst resulting in a solid oxide fuel cell (SOFC) having a reformer embedded therein. The reformer-modified SOFC functions internally to steam reform or partially oxidize a gaseous hydrocarbon, e.g. methane, to a gaseous reformate of hydrogen and carbon monoxide, which is converted in the SOC to water, carbon dioxide, or a mixture thereof, and an electrical current. In another embodiment, an electrical insulator is disposed between the fuel manifold and the mesh resulting in a solid oxide electrolysis cell (SOEC), which functions to electrolyze water and/or carbon dioxide.

The invention discloses a gradient electrode and a solid oxide battery. The gradient electrode is used for a solid oxide fuel battery or a solid oxide electrolytic cell, and the reaction activity of the gradient electrode is increased in a gradient way along the air flow direction. The gradient electrode and the solid oxide fuel battery or the solid oxide electrolytic cell containing the gradientelectrode have the advantages that the distribution difference of polarizing property of the electrode along the air flow direction can be avoided or effectively reduced, so that the running efficiency of the electrode is ensured, and the attenuation of the battery is relieved.

The invention belongs to the technical field of synthetic ammonia, and particularly relates to an ammonia synthesis method by coupling a solid oxide electrolytic tank with a fossil fuel ammonia synthesis system. The method comprises the following steps: preparing hydrogen by taking fossil fuel as a raw material, then mixing the hydrogen with nitrogen to carry out an ammonia synthesis reaction, then collecting carbon dioxide gas generated in the hydrogen production step, mixing the carbon dioxide gas with water vapor, introducing the mixed gas into a solid oxide electrolytic tank to carry out electrolysis, and returning the generated gas to the hydrogen production step for cyclic utilization. According to the invention, the fossil fuel ammonia synthesis system is coupled with the solid oxide electrolytic tank, so that carbon dioxide gas generated in the process of hydrogen production by fossil fuel is effectively utilized, cyclic utilization of carbon dioxide is realized, and carbon emission is reduced.

The invention relates to a thermoelectricity and hydrogen multi-combination-supply system based on solar energy. The system comprises a disc-type solar condenser, a solid oxide electrolytic tank, a proton exchange membrane fuel battery, a dual-level Rankine cycle, heat exchangers, a humidifier, a cold water tank and a hot water tank. The solid oxide electrolytic tank is a solid oxide electrolysiselectric pile, the proton exchange membrane fuel battery is a proton exchange membrane fuel battery electric pile, and the dual-level Rankine cycle is used by combining a high-temperature Rankine cycle and a low-temperature Rankine cycle and mainly comprises the heat exchangers, pumps, condensers, turbines and a flash evaporator. According to the thermoelectricity and hydrogen multi-combination-supply system based on the solar energy, the disc-type solar condenser takes the solar energy as a driving heat source, through the Rankine cycle, water electrolysis and a fuel battery power generationtechnology, continuous electric power, heating and hot water are provided for users, and clean and efficient utilization for the solar energy is achieved. The thermoelectricity and hydrogen multi-combination-supply system based on the solar energy is suitable for a distributed energy system, the demands of the users for multiple kinds of energy are met, and the utilization rate of the combination-supply system is further increased.

The present invention provides a solid oxide cell stack, comprising: —at least two cells which each comprise a first electrode layer (1), an electrolyte layer (2), a second electrode layer (3), —gas passage ways, and —sealing components (4), wherein the sealing components (4) comprise a glass component (4a) and a component comprising a metal oxide or metal oxide precursor (4b), and wherein the component comprising the metal oxide or metal oxide precursor (4b) is located at least in between the glass component (4a) and a gas passage way. The present invention further provides a method of producing the above solid oxide cell stack, comprising the steps of: —providing at least two SOC cells comprising each a first electrode layer or electrode precursor layer (1), an electrolyte layer (2), a second electrode layer or electrode precursor layer (3); —stacking at least two cells so as to form a cell stack including gas passage ways; and —sealing said cell stack with sealing components (4), wherein the sealing components (4) comprise a glass component (4a) and a component comprising a metal oxide or metal oxide precursor (4b), and wherein the component comprising the metal oxide or metal oxide precursor (4b) is at least located in between the glass component (4a) and a gas passage way.