61 results about "Excess hydrogen" patented technology

Systems and methods for synthesizing ammonia include one or more electrochemical hydrogen pumps to recover excess hydrogen gas from the ammonia synthesis product stream. The systems and methods improve overall yield and efficiency of the ammonia production process by separating and purifying hydrogen gas that otherwise would be lost.

Systems and methods for synthesizing ammonia include one or more electrochemical hydrogen pumps to recover excess hydrogen gas from the ammonia synthesis product stream. The systems and methods improve overall yield and efficiency of the ammonia production process by separating and purifying hydrogen gas that otherwise would be lost.

The invention relates to the technical field of preparation of hydrofluoroolefin, in particular to a method for preparing 2, 3, 3, 3-tetrafluoropropene, which comprises the following steps: carrying out fluorination reaction on 3, 3, 3-trifluoro-2-chloropropene and excessive hydrogen fluoride under the action of a catalyst to generate a first mixture flow containing 1, 1, 1, 2, 2-pentafluoropropane (245cb), and separating the first mixture flow from the first mixture flow to obtain the 2, 3, 3, 3, 3-tetrafluoropropene. Then directly introducing the first mixture flow into a dehydrofluorination reactor for gas phase dehydrofluorination reaction to generate a second mixture flow containing 2, 3, 3, 3-tetrafluoropropene, hydrogen fluoride and unreacted raw materials, finally condensing the second mixture to remove hydrogen chloride, condensing and recycling hydrogen fluoride to obtain a third mixture flow, and rectifying the third mixture flow to obtain 2, 3, 3, 3-tetrafluoropropene. And 3, 3, 3, 3-tetrafluoropropene. According to the invention, unavoidable process wastes in the prior art are converted into recyclable reaction raw materials, the environmental protection and economic pressure of by-product treatment in the prior art is eliminated, meanwhile, the purpose of continuous flow reaction is effectively realized, and the process control difficulty and the process cost are reduced.

The present disclosure generally relates to systems and methods for managing and / or excess hydrogen flow in a system comprising a fuel cell or fuel cell stack based on humidity measurements.

A method for combustion of an ammonia mixed fuel, according to one embodiment, comprises: a fuel adjustment step of preparing a mixed fuel containing ammonia and hydrogen by mixing ammonia and hydrogen such that hydrogen is mixed in an amount in excess of gaseous ammonia on a volume basis; and a combustion step of supplying the mixed fuel and oxygen to an ammonia combustion catalyst to perform combustion.

The application discloses an integrated marine computing power center system for realizing hydrogen storage and energy supply by marine energy, which comprises a marine computing power center (1), a seawater heat exchange module (2), a temperature control module (3), a membrane distillation module (4), a SOEC water electrolysis module (5), a hydrogen storage module (6), a liquefaction module (7), a SOFC fuel cell module (8) and a hydrogen storage and energy regulation module (9). Normal temperature seawater exchanges heat with cooling water of the marine computing power center at the seawater heat exchange module, the heat-exchanged seawater enters the membrane distillation module after being regulated by the temperature control module, and fresh water is separated out, the fresh water is electrolyzed by the SOEC water electrolysis module to generate hydrogen, the hydrogen is stored by the hydrogen storage module and is used for power generation of the SOFC fuel cell module, the excess hydrogen is liquefied and stored by the liquefaction module, and the hydrogen storage and energy regulation module regulates the supply, storage and replenishment of the hydrogen. The application provides an integrated solution for the marine computing power center to be completely self-sufficient in energy, without needing to access external power supply, and with zero carbon emission in the whole process.

This invention discloses a multivariable, highly coupled hydrogen-oxygen dual-loop coordinated control method for hydrogen fuel cells, comprising the following steps: S1, establishing a nonlinear high-order system model with flow rate and pressure coupling based on the cathode and anode gas dynamic equations of the fuel cell system; S2, designing a multivariable coordinated backstepping controller with the excess oxygen ratio, excess hydrogen ratio, and anode-cathode pressure difference as control objectives; S3, considering the influence of load changes and model uncertainties on the hydrogen-oxygen dual loop, introducing an adaptive control method and designing control commands for the air compressor, circulating pump, and solenoid valve; S4, selecting a suitable Lyapunov function to prove the stability of the system and completing the adaptive backstepping control of the anode-cathode pressure difference and gas flow rate; This invention solves the problem of multivariable, highly coupled coordinated control of the hydrogen-oxygen dual loop in fuel cells, and can maintain the transient and steady-state performance of the system under sudden load changes, improving the safety and reliability of system operation.

The invention belongs to the technical field of clean energy, and specifically relates to a novel biogas-based green methanol device and method, comprising the following steps: S1: raw gas is input into a raw gas compressor and pressurized to 1.3 MPaG, and then preheated to 330°C through a primary convection section of a converter; S2: entering a hydrogenation reactor for olefin saturation to remove olefins and oxygen, and then entering a zinc oxide desulfurization reactor to remove excess hydrogen sulfide gas; S3: the refined raw gas is mixed with water vapor output from a boiler, and then preheated to 600°C through a secondary convection section of a converter and a primary conversion reaction is performed; S4: the gas after the secondary preheating is transported to a 910°C environment of a radiation section of a converter for a secondary conversion reaction; S5: methanol synthesis is performed in an isothermal methanol synthesis tower; the invention can reduce carbon deposition of a catalyst in the process of preparing methanol from biogas, avoid frequent replacement of the catalyst, improve work efficiency and reduce use costs.

The invention discloses a hydrogen physiotherapy system based on a fuel cell, and relates to the technical field of fuel cells, the fuel cell comprises a pool body, a power grid subsystem and a fuel cell subsystem, the pool body is provided with a cavity capable of accommodating pool water and is used for physiotherapy; the power grid subsystem is used for supplying power to electric equipment around the pool body; the fuel cell subsystem comprises an electric pile, the electric pile is provided with an electric energy output terminal and an anode exhaust port, the electric energy output terminal is electrically connected with the power grid subsystem and is used for supplying power to the power grid subsystem, and the anode exhaust port is communicated with the cavity and is used for introducing excessive hydrogen in the electric pile into pool water; the hydrogen-rich water is formed. According to the technical scheme provided by the invention, by arranging the fuel cell subsystem, excessive hydrogen in an electric pile is reasonably applied, and meanwhile, electric energy can be provided for the power grid subsystem, so that the energy utilization rate is improved, and the operation cost is reduced.

A plant and a process for separating hydrogen from natural gas. The plant includes a hydrogen separation module, a heat exchanger, a decompressor, downstream of the heat exchanger and in fluid connection with the heat exchanger through a first outlet duct of the heat exchanger, and a flash separator, downstream of the decompressor and in fluid communication with the decompressor through an outlet duct of the decompressor. The flash separator separates a flow of natural gas with a hydrogen content higher than a predetermined threshold, entering the hydrogen separation module through an inlet duct of the heat exchanger, into a first flow of natural gas containing the excess hydrogen and a second flow of natural gas with a hydrogen content below the predetermined threshold. The flash separator includes an upper outlet and a lower outlet, from which an outlet or recirculation duct extends.

The invention relates to a fuel cell system (3) for a drive train (2) of a vehicle (1), comprising - a plurality of fuel cells (5) combined to form a fuel cell stack (4); - an anode supply (6) with an anode supply line (7) for supplying the fuel cell stack (4) with hydrogen gas and an anode exhaust gas line (8) for discharging anode exhaust gas; - a cathode supply (9) with a cathode supply line (10) for supplying the fuel cell stack (4) with oxygen-containing air and a cathode exhaust gas line (11) for discharging cathode exhaust gas; - a hydrogen burner (12) designed to reduce excess hydrogen gas; and - a heat exchanger (13) designed to transfer heat from the hydrogen burner (12). Furthermore, the invention relates to a drive train (2) for a vehicle (1) and to a vehicle (1) having such a drive train (2).

This invention relates to a non-metallic porous carbon anode material, its preparation method, and its application. The preparation method includes: activating a carbon-containing raw material in a hydrogen-containing mixed gas to obtain porous carbon and a benzene-rich hydrocarbon gas; depositing the non-metallic source gas and the porous carbon in a primary deposition; and then depositing the non-metallic source gas and the benzene-rich hydrocarbon gas in a secondary deposition to obtain the non-metallic porous carbon anode material. The carbon-containing raw material is further de-ashed before use, or the porous carbon is de-ashed and then mixed. This invention achieves continuous preparation of porous carbon and non-metallic porous carbon anode materials by activating the carbon-containing raw material with hydrogen. The excess hydrogen generated in this process can be recycled to the hydrogen activation step for reuse. Hydrogen activation enables efficient deoxygenation of the carbon-containing material, avoiding the generation of other oxide impurities during the deposition of non-metals, effectively ensuring the safety of the deposition process. The benzene-rich hydrocarbon byproduct generated during the preparation of porous carbon can further carbonize the material, achieving efficient utilization of carbon resources.

The present invention discloses a hydrogen storage tank capable of automatically relieving pressure and alarming, which comprises a storage unit including an inner tank, a hydrogen outlet, an outer tank, a nitrogen outlet, and a support platform; an inflation unit including an inflation port, an intake assembly, and a gas reversing valve; and a pressure relief unit including a pressure relief cover, a ventilation column, a pressure relief member, and a pressure sensor. The beneficial effects of the present invention are as follows: by filling inert nitrogen in the interlayer between the inner and outer tanks, accidents such as spontaneous combustion and gas cloud explosion caused by accidental leakage of high-pressure hydrogen can be effectively prevented. By adjusting the same inflation device, the operations of injecting nitrogen into the interlayer and high-pressure hydrogen injection can be respectively achieved, reducing processes and improving work efficiency. In addition, through a pressure relief device, excessive hydrogen is relieved to the nitrogen interlayer, so that the released hydrogen cannot contact the outside air, eliminating the explosion risk. The hydrogen-nitrogen mixed gas in the interlayer can also be recycled, improving economic benefits and the safety performance of the storage tank.

The present invention discloses a device and method for the coordinated removal and solidification of hydrogen peroxide and organic matter, comprising a water inlet assembly, a radar level gauge, an online COD analyzer, an online hydrogen peroxide detector, a variable frequency fan, a low-speed disc assembly, a floating row fixing rod, a floating row stopper, a floating row device, a floating row hose, a control center, a diffuser membrane disc, and a solidification decomposition tank. In the reaction system of the present invention, a filler acts as a catalyst to accelerate the decomposition of hydrogen peroxide. The filler itself is essentially non-consumable and does not form new pollutants, saving the cost of using reagents and the cost of sludge treatment. Organic pollutants in wastewater are degraded by the combined action of the filler, excess hydrogen peroxide, and the diffuser. While removing excess hydrogen peroxide, the oxidizing properties of hydrogen peroxide are fully utilized to remove organic matter and achieve the purpose of water purification.

The present invention relates to a three-dimensional ordered mesoporous nickel phosphide hydrogen evolution electrocatalytic material, the preparation method of which comprises the following steps: preparing ordered mesoporous silica, introducing a nickel source into the ordered mesoporous channels thereof, and calcining to obtain nickel oxide / ordered mesoporous silica; weighing a phosphorus source and nickel oxide / ordered mesoporous silica in proportion, calcining to fully phosphate the nickel oxide / ordered mesoporous silica, and performing a passivation treatment to obtain nickel phosphide / ordered mesoporous silica; etching the nickel phosphide / ordered mesoporous silica with an excess of hydrofluoric acid, washing and drying after sufficient reaction, to obtain a three-dimensional ordered mesoporous nickel phosphide hydrogen evolution electrocatalytic material. The present invention designs a hydrogen evolution electrocatalyst material with excellent performance by introducing an ordered mesoporous structure. The internal channels of the ordered structure are bicontinuous and orderly interconnected, the mesoporous surface is rich in catalytic active sites, the specific surface area is relatively large, and the hydrogen evolution catalytic activity of the nickel phosphide is improved. The material has good application prospects in hydrogen energy development and application.

This invention discloses a method for preparing high-compaction lithium iron phosphate (LFP) cathode material using a mixed iron source, comprising the following steps: S1, preparing the acidic mixture; S2, adjusting the pH of the acidic mixture to 0.8–2.0 using phosphoric acid, followed by solid-liquid separation to obtain an acidic clarified solution; S3, pretreating the acidic clarified solution to obtain a first slurry; S4, adding excess hydrogen peroxide to the first slurry for oxidation, and aging at 60–100°C for 2–6 hours to obtain a white-pink slurry; S5, performing solid-liquid separation on the white-pink slurry to obtain a filter cake, which is then washed, dried, and calcined to obtain high-compaction LFP. Its advantages are: 1) It can significantly improve the compaction density of the lithium iron phosphate cathode material; 2) The method of this invention is simple and flexible to operate, low in cost, and suitable for large-scale production.

The invention relates to the technical field of hydrogen energy, in particular to a synthesis gas hydrogen-carbon ratio adjusting process based on lactone catalytic hydrogenation. The method comprises the following steps: performing catalytic hydrogenation on hydrogen-rich synthesis gas and hydrogen-depleted lactone as shown in a formula 1 under the action of a catalyst to prepare a hydrogen-rich diol compound as shown in a formula 2 and hydrogen-depleted gas; the excessive hydrogen is fixed in the diol compound, and the hydrogenation degree of the medium can be controlled by changing the process conditions of the obtained residual gas composition, so that the hydrogen-carbon ratio is adjusted.

The invention discloses hydrogen storage equipment with a leakage protection structure, and relates to the technical field of hydrogen storage, the hydrogen storage equipment comprises a storage tank and a protection shell slidably mounted on the outer surface of the storage tank, a breather pipe is fixedly mounted at the top of the storage tank, and a high-pressure valve is fixedly mounted at the top of the breather pipe; an air outlet pipe is fixedly installed on the outer surface of the storage tank, an air leakage mechanism is installed in the air outlet pipe, an alarm is fixedly installed on the outer surface of the protection shell, and a buffering mechanism is installed between the bottom of the storage tank and the bottom of an inner cavity of the protection shell. According to the hydrogen storage equipment with the leakage protection structure, automatic adjustment of the pressure in the storage tank is achieved through the gas leakage mechanism, excessive hydrogen is discharged in time when the pressure is too high, the storage tank is prevented from being damaged due to continuous rising of the pressure, downward moving impact force generated when the pressure of the storage tank is released is relieved through the buffering mechanism, the structural integrity of the storage tank is protected, and the service life of the storage tank is prolonged.

A system and method for operating a molten carbonate fuel cell is provided to produce an increased amount of H2 in an anode effluent while maintaining the cell to operate within a normal operating range, such as a temperature difference between a cathode input stream and a cathode effluent of 35 DEG C or higher, and a temperature of the cathode effluent is higher than the cathode input stream. A temperature difference between the cathode input stream and the cathode output stream is achieved while still producing an excess of hydrogen due in part to the steps of: a) feeding an input stream containing hydrocarbons and / or reformable fuel to an external reformer; b) reforming 20% by volume or more of the hydrocarbons and / or reformable fuel in an external reformer; and then c) feeding the partially reformed input stream to a fuel cell or a fuel cell stack for further reforming in the anode and / or in the reforming elements in the fuel cell stack.

The invention belongs to the technical field of chemical engineering, and particularly relates to hydrogen-oxygen heating reaction and gas recovery equipment and a method thereof. The device comprises a hydrogen input pipeline, an oxygen input pipeline, a hot water output pipeline and a cooling water input pipeline, the application scenes of hydrogen normal-temperature reaction and open-fire-free combustion are expanded, the device is simple in structure, safe, reliable and suitable for large-scale production and application, meanwhile, redundant hydrogen and water vapor generated through reaction can be recycled, and the energy consumption is reduced. The water consumption can be reduced by 5%, the hydrogen recovery efficiency is greater than or equal to 95%, the reaction energy consumption is reduced, and the overall reaction efficiency is improved.

A fuel cell system includes means to separate water from the cathode exhaust stream that is integrated into a fuel cell stack for reducing its overall size. Fuel cell assemblies are compressed togethe

The utility model discloses a passivation contact cell, a photovoltaic assembly and a system. The cell comprises a silicon wafer body. Front and back surface structural layers; and front and back metal electrodes. According to the utility model, on one hand, a uniform, compact and void-free back metal electrode is obtained through carbon doping, the surface tension of hydrogen-doped polycrystalline silicon is improved, and the water contact angle is increased, so that an electroplating solution is difficult to attach to a hydrogen / phosphorus-doped polycrystalline silicon layer, excessive hydrogen bubbles are retained on the surface of the polycrystalline silicon, and the deposition possibility of the back metal electrode is reduced; on the other hand, the electroplated nickel / copper / tin composite electrode replaces a silver electrode, has the advantages of being better in morphology, lower in bulk resistivity, higher in conductivity, higher in capability of collecting photon-generated carriers, capable of saving silver paste cost and the like, and can form better ohmic contact, reduce contact resistivity and improve photoelectric conversion efficiency; the hydrogen / phosphorus doped polycrystalline silicon has good passivation performance at the same time, the structure is optimized, and the cost is reduced.

The present application relates to the technical field of clean energy, and in particular to a novel device and method for preparing green methanol from biogas. The method comprises the following steps: S1: introducing a feed gas into a feed gas compressor, pressurizing same to 1.3 MPaG, and then preheating same to 330ºC by means of a primary convection section of a conversion furnace; S2: entering a hydrogenation reactor for olefin saturation to remove olefins and oxygen, and then entering a zinc oxide desulfurization reactor to remove excess hydrogen sulfide gas; S3: mixing the refined feed gas with water vapor outputted by a boiler, carrying out secondary preheating on the mixture to 600ºC by means of a secondary convection section of the conversion furnace, and carrying out a primary conversion reaction; S4: conveying the gas subjected to the secondary preheating to a radiation section of the conversion furnace in an environment of 910ºC for a secondary conversion reaction; and S5: performing methanol synthesis in an isothermal methanol synthesis tower. The present application can reduce carbon deposition on a catalyst during the preparation of methanol from biogas, so that frequent replacement of the catalyst is avoided, thereby reducing use costs while improving working efficiency.

The utility model belongs to the technical field of hydrogen storage, and particularly relates to a pressure stabilizing device in a hydrogen production and storage process. The pressure stabilizing device in the hydrogen production and storage process comprises a raw material storage tank, a converter, a pressure stabilizing tank, a first pressure regulating assembly and a second pressure regulating assembly, the raw material storage tank conveys hydrogen production raw materials to the converter through a metering pump, and the first pressure regulating assembly and the second pressure regulating assembly are arranged between the converter and the pressure stabilizing tank in parallel. The adjusted pressure of the second pressure adjusting assembly is larger than that of the first pressure adjusting assembly; a pressure detection unit is arranged on the pressure stabilizing tank, the metering pump and the pressure detection unit are connected with a controller, the controller controls the flow of the metering pump according to the hydrogen pressure detected by the pressure detection unit, and when the pressure in the pressure stabilizing tank reaches the adjusting pressure set by the first pressure reducing valve and the pressure is continuously maintained at the pressure, the second pressure adjusting assembly is opened, and the pressure is adjusted. Hydrogen passes through the second pressure regulating assembly, and part of excessive hydrogen is stored in the pressure stabilizing tank, so that safe operation of equipment is ensured.

A system and method for converting a common hydrogen-based input fluid into an proton-rich ionic fluid (PRIF) comprising an overabundance of hydrogen H+protons is disclosed. This conversion occurs in the absence of elevated temperatures or pressures, so that the resulting output fluid is suitable for shipping or storage at Standard Temperature and Pressure (STP): Some practical usages for the PRIF are also disclosed.

The invention provides a multi-energy complementary source decarburization, hydrogen production and hydrogen storage integrated system and method.The system comprises a renewable energy power generation system, a water electrolysis hydrogen production system and a chemical chain decarburization hydrogen production and hydrogen storage integrated system; the chemical-looping decarburization hydrogen production and storage integrated system comprises a fuel reactor, a hydrogen production reactor, a hydrogen storage unit and an oxidation exothermic reactor. The fuel reactor is connected with the water electrolysis hydrogen production system, and the oxygen carrier is in countercurrent contact with excess hydrogen output by the water electrolysis hydrogen production system in the fuel reactor and is subjected to an oxidation-reduction reaction to generate a first solid oxide and water vapor. The hydrogen storage unit stores hydrogen in the form of the first solid oxide, and the oxidation exothermic reactor is connected with the hydrogen production reactor and the fuel reactor. According to the method and the system, peak clipping and valley filling can be realized in a multi-energy complementary mode, the fluctuation of renewable energy sources is stabilized, and stable output of intermittent renewable energy sources is ensured.

The invention relates to the technical field of hydrogen fuel cells, in particular to a leakage-proof hydrogen fuel cell system of a hydrogen-powered unmanned aerial vehicle, which comprises two end plates and a cell stack, a plurality of anode cavities are divided into at least two anode cavity groups, each anode cavity group comprises at least two anode cavities, and the anode cavities are arranged in the cell stack. The device further comprises a hydrogen shunting assembly, a residual hydrogen converging assembly and a pressure sensor; by grouping the anode cavities of the cell stack and matching independent and controllable hydrogen supply and residual hydrogen recovery passages, an active safety architecture with rapid fault diagnosis and intelligent partition isolation capabilities is constructed, and the problems that when local leakage occurs in an existing centralized hydrogen supply system, a leakage source cannot be rapidly positioned and cut off, and the system reliability is low are solved. Therefore, the prominent problems that fuel is continuously consumed, leakage is aggravated, the burning and explosion risk is high due to the fact that faults cannot be isolated, and the overall reliability of the system is low are solved.

A system and method for converting a common hydrogen-based input fluid into an proton-rich ionic fluid (PRIF) comprising an overabundance of hydrogen H1+ protons is disclosed. This conversion occurs in the absence of elevated temperatures or pressures, so that the resulting output fluid is suitable for shipping or storage at Standard Temperature and Pressure (STP). Some practical usages for the PRIF include 1) AMMONIA MANUFACTURING WITHOUT HABER-BOSCH; 2) CRUDE OIL IMPROVEMENT (API LIFT); 3) MOLECULAR ENHANCEMENT OF HYDROCARBON; and 4) DESULFURIZATION (distillate upgrade).

The present invention relates to the technical field related to water pollution control, and specifically discloses an arsenic-containing wastewater treatment device, comprising a bracket and a tank body fixedly mounted within the bracket, wherein a partition is fixedly mounted within the tank body; a liquid supply assembly for intermittently introducing an oxidant into the wastewater below the partition; a sampling assembly for intermittently sampling the wastewater; and a monitoring assembly for monitoring the status of the wastewater sample. The present invention allows for better control of the reaction rate of hydrogen peroxide with arsenic by introducing small amounts of hydrogen peroxide into the arsenic-containing wastewater multiple times, avoiding incomplete treatment due to an overly rapid reaction and overoxidation or other side reactions that may result from the addition of a large amount of hydrogen peroxide at one time, thereby ensuring the selectivity of the oxidation process. The device also prevents excess hydrogen peroxide from reacting with other substances in the wastewater, altering the pH value of the wastewater, and reducing the efficiency of subsequent pentavalent arsenic precipitation reactions or causing unstable precipitation.

Provided herein are systems and methods for using pure hydrogen as fuel in a turbocharged fuel cell. A vehicle may include a storage configured to store pressurized hydrogen, a fuel cell, a catalytic converter, and a turbo compressor. The fuel cell includes an anode loop fluidically coupled to the storage and configured to receive the pressurized hydrogen therefrom, and a cathode loop configured to receive oxygen. The catalytic converter, arranged downstream from the anode loop, recovers excess hydrogen from the pressurized hydrogen used by the anode loop and recovers excess oxygen from the oxygen used by the cathode loop. The turbo compressor includes an expander to recover heat from the catalytic converter.