33 results about "Hydrogen production rate" patented technology

This application provides a method and system for optimizing the layout of hydrogen refueling networks based on big data, relating to the field of hydrogen refueling station planning technology. This application acquires the vehicle-end driving trajectory of hydrogen fuel cell vehicles, the hydrogen pressure reduction at the vehicle end, and the hydrogen production rate of local hydrogen production plants to calculate the node hydrogen consumption equivalent for each road segment node; performs road segment blocking operations on the physical road network according to hazardous chemical prohibition rules to generate a hydrogen transportation road network; takes the local hydrogen production plant as the starting node, performs capacity attenuation calculations outward along the hydrogen transportation road network based on the plant's hydrogen production rate, and outputs the node hydrogen supply equivalent for each road segment node; spatially superimposes and cancels the node hydrogen consumption equivalent with the node hydrogen supply equivalent, locks the target road segment node that meets the first preset condition, performs spatial correction, and outputs the station deployment coordinates. This invention can automatically generate hydrogen refueling station site selection coordinates based on the spatiotemporal matching relationship between actual vehicle-end hydrogen consumption and local hydrogen supply, improving the rationality and operational efficiency of the hydrogen refueling network layout.

This invention relates to the field of photocatalyst technology, specifically to a Ni single-atom / phosphorus / g-C3N4 composite material, its preparation method, and its applications. The Ni single-atom / phosphorus / g-C3N4 composite material provided by this invention uses hollow tubular g-C3N4 as a matrix, simultaneously doped with phosphorus and Ni single atoms. Results show that simultaneous doping with phosphorus and Ni single atoms can effectively regulate the electronic configuration of g-C3N4, expand visible light absorption, and promote charge separation and transfer. The hydrogen production rate of the Ni single-atom / phosphorus / g-C3N4 composite material can reach 2707.7 μmol / h. ‑1 g ‑1 The concentrations were approximately 615.4 μmol / h of pure g-C3N4. ‑1 g ‑1 ), phosphorus-doped g-C3N4 composite material (1602.2 μmol h) ‑1 g ‑1 The apparent quantum efficiency of the composite material is 4.4, 1.7, and 1.5 times that of the Ni single-atom doped g-C3N4 composite material; it has an apparent quantum efficiency of 8.8% at 400 nm and exhibits excellent stability in 6 photocatalytic hydrogen production cycles.

The application discloses a returning material unit, and a double-fluidized bed reaction device applying the unit. The returning material unit is arranged between a combustion chamber and a gasification chamber in the double-fluidized bed reaction device and is used in a hydrogen production process of biomass raw materials. The returning material unit comprises a returning material chamber which is communicated with the gasification chamber or the combustion chamber through a feeding pipe. A first air distribution cavity is arranged at the lower part of the returning material chamber. A loosening chamber is arranged to receive bed material particles from the combustion chamber or the gasification chamber and to block gas. The middle and upper parts of the loosening chamber are separated from the returning material chamber through a partition plate. The bottom plate of the loosening chamber is arranged to be inclined towards the partition plate. A second air distribution cavity is arranged at the lower part of the loosening chamber. The returning material unit can reduce the possibility of gas channeling between hydrogen-rich synthesis gas and flue gas and reduce the fluidized dead zone while ensuring the hydrogen production rate. The structure design of the gasification chamber of the double-fluidized bed reaction device can make the solid particles realize local core-annular flow circulation, and the heat transfer between the bed material particles and the biomass particles is enhanced.

The application relates to the electrolysis field and discloses a catalyst-coated membrane assembly manufacturing method and an electrolysis module, wherein the catalyst-coated membrane assembly manufacturing method comprises the following steps: activating the surface of a proton exchange membrane, so that the surface of the proton exchange membrane is formed with first active groups; modifying catalyst slurry, so that the catalyst slurry is formed with second active groups, the second active groups are complementary to the first active groups; transferring the modified catalyst slurry from a transfer film to the two sides of the activated proton exchange membrane, and forming an anode catalyst layer and a cathode catalyst layer on the two sides of the proton exchange membrane respectively. The application realizes the close combination of catalyst active sites and mass transfer channels, greatly reduces the interface impedance, enables higher current density under the same working voltage, significantly improves the utilization rate of the catalyst, greatly improves the hydrogen production rate of the formed electrolysis module, and shortens the waiting time required for reaching the target hydrogen concentration in the civil hydrogen production scene.

The application discloses a method for improving hydrogen production performance of Clostridium butyricum by using hematite nanoparticles, and belongs to the technical field of biological hydrogen production and microbial metabolism regulation. The method improves the hydrogen production performance by adding hematite nanoparticles into an anaerobic fermentation hydrogen production system of Clostridium butyricum for anaerobic fermentation. The application first discloses a specific double regulation mechanism of hematite nanoparticles on hydrogen production of Clostridium butyricum. By using hematite nanoparticles as a core regulation material, and through precise concentration gradient addition and stage temperature synergistic regulation, the hydrogen production lag period can be greatly shortened, the initial hydrogen production rate can be improved, byproduct synthesis of butyric acid can be inhibited, and the efficient hydrogen production path of acetic acid can be strengthened. The core technical problems that existing iron-based additives cannot shorten the hydrogen production lag period, the initial hydrogen production efficiency is low, and product feedback inhibition is easily caused are solved. The method is simple to operate, has strong industrialization adaptability, and can be widely applied to industrialization batch and continuous production of dark fermentation biological hydrogen production.

This specification discloses an ammonia decomposition reactor comprising a plurality of reaction chambers, a passage, an inlet and outlet, and a plurality of flat plate-type heaters. According to the exemplary embodiments of the present invention, the hydrogen production rate can be maximized relative to the weight and volume of the system, and the heaters can be individually controlled, providing the effect of facilitating heat management.

The application belongs to the field of photocatalytic materials, and particularly relates to a silver metavanadate composite cadmium sulfide photocatalytic material, a preparation method thereof and application thereof in photocatalytic hydrogen production. The preparation method comprises the following steps: taking a sulfur source and a cadmium source, adding ethylenediamine, stirring and uniformly mixing; transferring to a hydrothermal reaction kettle for reaction; after the reaction is completed, taking the obtained suspension, centrifuging, washing and drying to obtain cadmium sulfide powder; adding water to the cadmium sulfide, adding a silver source and a vanadium source under stirring, stirring, transferring to a reaction kettle for hydrothermal reaction, then centrifuging, washing and drying to obtain the silver metavanadate composite cadmium sulfide photocatalytic material. The photocatalytic material has a relatively obvious catalytic effect in photocatalytic hydrogen production reaction. Under the irradiation of a xenon lamp and under the condition of a set reaction system, the hydrogen production rate of the photocatalyst reaches 228.8 micromoles per gram per hour, which is obviously superior to that of a pure cadmium sulfide catalyst.

This invention discloses an in-situ mixed-flow sampling device and an electrolytic water system. The in-situ mixed-flow sampling device includes a mixed-flow sampling mechanism and an analysis mechanism. The mixed-flow sampling mechanism includes at least one inlet, at least one outlet, and at least one sampling port. A turbulence structure is formed inside the mixed-flow sampling mechanism to drive fluid turbulence. A gas chamber for gas phase enrichment is formed at the top of the turbulence structure. A gas guide tube is provided inside the mixed-flow sampling mechanism, with one end extending into the gas chamber and the other end connected to the sampling port. The gas chamber and the inner cavity of the gas guide tube together form a micro-cavity with a volume ≤20mL. An analysis mechanism is provided at the sampling port and is configured for selective permeation. The beneficial effects of this invention are: while ensuring good sampling accuracy, it can also drastically reduce the overall device size, making it suitable for oxygen-hydrogen sampling scenarios in low-power electrolytic water systems with a hydrogen production rate ≤5Nm³ / h.

This invention proposes a boron-phosphorus co-doped multi-element alloy catalyst supported on a metal oxide substrate, its preparation method, and its application. It belongs to the technical field of sodium borohydride hydrolysis hydrogen production materials. The method involves loading cobalt salts (such as cobalt chloride or cobalt nitrate), iron salts (such as ferric chloride or ferric nitrate), and hypophosphite (such as sodium hypophosphite) onto a support (such as γ-alumina or titanium dioxide) using an initial wet impregnation method. Sodium borohydride solution is added for chemical reduction, and boron is added for doping. After washing the reduction product, the catalyst is dried to obtain the supported boron-phosphorus co-doped multi-element alloy catalyst. When used as a sodium borohydride hydrolysis hydrogen production catalyst, it provides a maximum hydrogen production rate of 12729.78 mL·g under optimal conditions. cat ‑1 ·min ‑1 It produces 100% of the theoretical hydrogen yield and features good catalytic performance, simple preparation method, abundant raw materials, and low cost.

This invention relates to a supported cerium-zirconium solid solution photocatalyst, its preparation method, and its application in the catalytic reaction of organic liquid hydride dehydrogenation for solar energy storage, belonging to the field of solid solution photocatalyst technology. The invention first prepares a cerium-zirconium solid solution using an alkaline solution co-precipitation method or a reducing agent combustion method, and then prepares a supported cerium-zirconium solid solution photocatalyst using a chemical deposition method or a photodeposition method. The invention also relates to a conversion device for capturing and storing solar energy. In the solar-driven cyclohexane dehydrogenation catalytic reaction, the supported cerium-zirconium solid solution photocatalyst prepared in this invention exhibits excellent catalytic activity and stability, with a hydrogen production rate as high as 2.89 mol·g⁻¹. Pt ‑1 ·min ‑1 The system has a turnover rate exceeding 100,000 times and a hydrogen purity exceeding 99.99%. The dehydrogenation catalytic reaction system described in this invention can effectively absorb ultraviolet, visible, and near-infrared light from sunlight, opening up new avenues for the widespread application of solar energy.

The application discloses a method for catalyzing sodium borohydride to produce hydrogen at low temperature, which is characterized by using natural flavonoids (including flavone, flavonol, isoflavone and the like) as a catalyst, using methanol or a mixture of methanol and water as a reaction solvent, using NaBH4 as a raw material for hydrogen production, and performing alcoholysis of NaBH4 to produce hydrogen. The catalyst used in the application is abundant in source and low in price, can catalyze sodium borohydride to produce hydrogen through alcoholysis at a wide reaction temperature range, has stable catalytic performance, high hydrogen production rate, good catalytic durability and reusability, and has important significance for the application and popularization of sodium borohydride in the field of hydrogen production.

This invention provides a sulfur-vacancy-rich PdS / CdS photocatalyst, its preparation method, and its application in the degradation of polylactic acid (PLA) plastics. The catalyst comprises a CdS substrate and a PdS cocatalyst supported on the CdS substrate. The CdS substrate is rich in sulfur vacancies. The PdS cocatalyst and the CdS substrate are simultaneously formed via an in-situ one-step coprecipitation method. The preparation method includes the following steps: mixing a cadmium source, a palladium source, and a sulfur source at room temperature to perform a one-step coprecipitation reaction; after the reaction, solid-liquid separation, washing, and drying are performed to obtain the sulfur-vacancy-rich PdS / CdS photocatalyst. No external reducing agent is added during the one-step coprecipitation reaction. The catalyst of this invention exhibits excellent photocatalytic activity, with a hydrogen production rate as high as 43.41 mmol·g under visible light. ‑1 ·h ‑1 The yield is approximately 40 times that of pure CdS, which is superior to existing similar catalysts. The preparation method enables the simultaneous construction of sulfur vacancies and PdS loading under mild conditions of room temperature, normal pressure, and no added reducing agent through a one-step co-precipitation method.

This invention discloses a butterfly-shaped NBS-COFs catalyst and its preparation method, belonging to the field of photocatalysis technology. Firstly, a butterfly-shaped thiophene sulfone-based precursor is reacted with a borate group via a Schiff base reaction to construct a covalent organic framework (BS-COFs) containing an electron-deficient component and a borate sulfone group. The methyl group provides the basis for the subsequent aldol condensation reaction. Secondly, a post-modification method is used to react the aldehyde group on the amino compound with the methyl group on the BS-COFs via an aldol condensation reaction, forming an NBS-COFs catalyst with an aminated, highly conjugated system and an electron-deficient structure. Thirdly, the lone pair electrons on the amino group are directionally anchored to the empty orbitals of Pt, thereby achieving high dispersion of Pt. The introduction of thiophene sulfone expands the light absorption range, and the planar structure facilitates the transport of photogenerated charges along the framework. The combination of thiophene sulfone and the electron-deficient component accelerates the separation and transport of photogenerated carriers, while the conjugated system avoids charge recombination. When used for photocatalytic water splitting to produce hydrogen, it exhibits excellent hydrogen production rate and stability, showing promising prospects in the field of photocatalysis.

The present application relates to the field of catalysis, in particular to a monolithic ammonia decomposition hydrogen production catalyst, a preparation method and use thereof, the monolithic ammonia decomposition hydrogen production catalyst comprising a honeycomb carrier and an active coating, the active coating being coated on the honeycomb carrier; the active coating comprising ruthenium, an alkali metal, a composite metal oxide and a carbon material; the composite metal oxide coating the carbon material; the ruthenium and the alkali metal being loaded on the composite metal oxide-coated carbon material. The monolithic ammonia decomposition hydrogen production catalyst provided by the present application has higher low-temperature ammonia decomposition activity, larger hydrogen production rate and excellent long-period stability, and the catalyst technology has simple preparation process, low energy consumption and is suitable for large-scale production application.

The application discloses a rotating type solar continuous hydrogen production reactor and method with ultrasonic reinforced interface mass transfer and belongs to the technical field of high-temperature solar thermochemical fuel production. In view of the problems of intermittent operation between reduction and oxidation steps of hydrogen production by a traditional reactor, slow water vapor adsorption and hydrogen desorption rate in the pores of porous ceramic reactants, and limited reaction kinetics hydrogen production rate, three innovations are provided: 1, an ultrasonic transmission system: titanium alloy waveguide is used to directionally excite the acoustic flow effect and micro disturbance in the oxidation zone; 2, rotating mesh transmission: a permanent magnet rotor is coaxially fixedly connected with a silicon carbide connecting rod, and a trapezoidal protrusion-groove structure is used to drive the periodic rotation of the foam ceramic to switch the reactor partitions (the oxidation zone and the reduction zone); and 3, a double-channel gas path: argon / water vapor is injected in the partitions to accurately control the required environment of the reaction. The application can realize continuous hydrogen production and hydrogen production rate improvement and is suitable for cerium oxide and perovskite oxygen carrier reactant systems.

This invention provides a continuous water electrolysis hydrogen production device based on a multi-segment ribbon reactor. The device includes a water circulation system, a reaction system, a hydrogen purification system, and a control system. In this continuous water electrolysis hydrogen production device, the reaction zone is separated from the raw material storage zone and the product storage zone, enabling large-scale in-situ hydrogen production through continuous production with a simple system configuration. During the continuous water electrolysis hydrogen production process, this invention maintains the reaction system within a narrow temperature range between the set temperature and the boiling point of water by balancing the heat exchange of each reaction tube segment, enhancing the heat transfer process inside and outside each reaction tube segment, and utilizing the heat absorption process of excess reaction water vaporization. This maintains the stability of the hydrogen production rate of the solid hydrogen storage material.

This invention discloses a molten salt modified rod-shaped graphitic carbon nitride material, its preparation method, and its applications. This rod-shaped graphitic carbon nitride material possesses a suitable defect structure and a rod-shaped microstructure. In water splitting hydrogen production performance tests, the hydrogen production performance of this catalyst is significantly improved compared to the original g-C3N4. The catalyst achieves a maximum hydrogen production rate of 1.75 mmol·g⁻¹ in photocatalytic water splitting experiments. ‑1 ·h ‑1 In the photocatalytic half-water splitting experiment with the addition of trace amounts of sacrificial agent, the rate of hydrogen production reached a maximum of 4.39 mmol·g. ‑1 ·h ‑1 It has a promising application prospect in the photocatalytic water splitting hydrogen production industry. Its preparation method has the advantages of simple materials, simple process, low cost and easy control, which is conducive to industrial application.

This invention discloses a Cu3SnS4 quantum dot / g-C3N4 nanosheet composite material, its preparation method, and its applications, belonging to the field of photothermal catalysis technology. The method includes the following steps: mixing and stirring a g-C3N4 nanosheet dispersion with a Cu3SnS4 quantum dot solution, followed by vacuum drying to obtain the Cu3SnS4 quantum dot / g-C3N4 nanosheet composite material. This invention effectively improves the quantum efficiency of photocatalytic reactions, efficiently utilizing solar energy to achieve photocatalytic water splitting for hydrogen production. The composite material prepared using the method provided by this invention exhibits a high hydrogen production rate and excellent stability. Furthermore, the method provided by this invention is energy-saving, low-consumption, green, and non-toxic.

The application belongs to the technical field of photocatalysis, and discloses a sulfate-modified carbon nitride material and a preparation method and application thereof.The preparation method comprises the following steps: (1) fully stirring a precursor and ammonium sulfate in an aqueous solution, and then continuously heating and stirring to dryness to obtain white crystalline powder; (2) grinding the white crystalline powder, loading the white crystalline powder into a crucible to calcine, and then cooling to room temperature, grinding to obtain the sulfate-modified carbon nitride material.The application discards harsh conditions such as sulfuric acid and high temperature and high pressure, has the significant advantages of simple operation, low cost and green environmental protection.Meanwhile, compared with ordinary carbon nitride, the sulfate-modified carbon nitride has stronger photocatalytic activity, faster hydrogen production rate and good stability, and the crystal structure is not changed.The synthesis process is simple and controllable, and has the application potential of large-scale industrial production.

This invention relates to the preparation and application of a carbon quantum dot-modified zinc cadmium selenide (ZNDS) sulfide with an embedded dual-field superhydrophilic photocatalyst for hydrogen production via water splitting, belonging to the field of photocatalytic hydrogen production technology. The invention uses citric acid and urea as raw materials to prepare hydrophilic carbon quantum dots via a hydrothermal method. Then, zinc acetate dihydrate, cadmium acetate dihydrate, thioacetamide, and a selenium powder-hydrazine hydrate solution are added to the carbon quantum dot system to achieve the preparation of an amide-bonded carbon quantum dot-modified ZNDS sulfide with an embedded dual-field superhydrophilic photocatalyst via a one-step hydrothermal method. The invention also discloses the application of this photocatalyst in hydrogen production via water splitting. Under the synergistic effect of multiple charge transport channels and photocatalysis-thermal catalysis, the photocatalyst significantly improves the directional separation and migration efficiency of photogenerated carriers, achieving a hydrogen production rate of 103.9~126.8 mmol·g under light-driven and thermally assisted conditions. cat ‑1 ·h ‑1 Furthermore, after eight consecutive uses, the photocatalytic activity remained above 91%. Therefore, the prepared photocatalyst has enormous potential for photocatalytic hydrogen production applications.

The application relates to a tin-doped two-dimensional organic-inorganic hybrid perovskite material, a preparation method thereof and application of the material in photocatalytic hydrogen production, and belongs to the technical field of energy catalysis. The chemical formula of the material is Sn 0.05 (C5H 10 F2N)2PbI4, and the material is obtained by doping Sn 2+ ions into a (4,4-difluoropiperidinium)2PbI4 perovskite crystal lattice. The material is prepared by using 4,4-difluoropiperidine, lead iodide and stannous iodide as raw materials in a hydriodic acid system, and through heating dissolution and cooling crystallization under the reduction protection of hypophosphorous acid. The introduction of Sn 2+ optimizes the energy band structure of the material, enhances visible light absorption, and further induces a local polarization field, effectively promotes the separation and migration of photo-generated carriers, and thus realizes high-efficiency and stable photocatalytic hydrogen production performance. Through external ultrasonic, the interface charge separation efficiency and surface reaction kinetics are further improved, and the hydrogen production rate is significantly enhanced. The material has the advantages of mild preparation conditions, strong structure adjustability, high catalytic efficiency and good stability, and provides an effective way for developing a novel high-efficiency photocatalytic hydrogen production system.

The application provides a chemical chain reaction hydrogen production system and method. The system comprises a hydrocarbon conversion syngas reactor, a first gas-solid separation device, a syngas oxidation reactor, a second gas-solid separation device, a hydrogen production reactor and a third gas-solid separation device; the product outlet of the hydrocarbon conversion syngas reactor is connected with the feed inlet of the first gas-solid separation device, the gas phase product outlet of the first gas-solid separation device is connected with the gas feed inlet of the syngas oxidation reactor, the gas phase product outlet of the syngas oxidation reactor is connected with the feed inlet of the second gas-solid separation device, the solid phase product outlet of the syngas oxidation reactor is connected with the solid feed inlet of the hydrogen production reactor, and the product outlet of the hydrogen production reactor is connected with the feed inlet of the third gas-solid separation device. The technical scheme provided by the application can realize continuous methane efficient conversion, carbon dioxide capture and high hydrogen production rate and hydrogen purity.

This application discloses a method, apparatus, equipment, and storage medium for optimizing the energy storage capacity of an off-grid hydrogen production system, relating to the field of energy management technology. The disclosed method for optimizing the energy storage capacity of an off-grid hydrogen production system includes: inputting target weather data and station operation rules into the off-grid hydrogen production system output model to obtain wind power, photovoltaic power, energy storage potential, energy storage energy, and hydrogen production rate; calculating the voltage support coefficient based on wind power, photovoltaic power, energy storage potential, and AC bus parameters; determining a dual-objective optimization objective based on energy storage energy, hydrogen production rate, voltage support coefficient, and cost parameters; and determining the Pareto solution set based on the dual-objective optimization objective and an improved non-dominated sorting genetic strategy to obtain the optimal configuration of the target energy storage capacity. Applying this scheme can achieve synergistic optimization of the economic efficiency and voltage support stability of the off-grid hydrogen production system's energy storage capacity configuration.

The present application discloses a kind of photocatalyst composite material and its manufacturing method.Therein photocatalyst composite material includes inorganic semiconductor particle, organic semiconductor layer and electron transfer intermediate layer.Inorganic semiconductor particle is metal oxide semiconductor material.Organic semiconductor layer is formed by organic conjugated polymer, and is wrapped in the outer periphery of inorganic semiconductor particle.Electron transfer intermediate layer includes noble metal dispersed in the form of single atom or nanocluster on the surface of inorganic semiconductor particle, and is bridged between inorganic semiconductor particle and organic semiconductor layer, to form electron transport channel.By this means, the visible light absorption range is expanded, the directional electron transport path is provided, and the rapid recombination of electron-hole at the interface is inhibited.Finally, the light energy utilization rate and hydrogen production rate of water decomposition reaction can be improved, and long-time reaction stability is also possessed.

The application discloses a kind of solid hydrogen storage materials and preparation method thereof.The material is dense solid composite, by hydrogen production agent, non-noble metal boride catalyst and composite lithium cobalt oxide carrier is formed by pressure molding, and water can be supplied hydrogen.Hydrogen production agent is based on sodium borohydride or potassium borohydride;The carrier is modified composite lithium cobalt oxide, and has carrier and catalytic function.This application eliminates liquid solvent and porous support structure, builds synergistic catalytic system, to improve mass and volume hydrogen storage density, and ensure stable hydrogen production rate.Preparation method only involves solid phase mechanical mixing and pressing molding, and process is simple, suitable for large-scale production.The material has the characteristics of portable, safe, and can be used as an ideal hydrogen source, applied to hydrogen fuel cell and other fields.

The application belongs to the technical field of new energy and photocatalysis, and particularly relates to a Pt / FAPbBr3 photocatalytic material exposing (100) and (111) crystal faces, and a preparation method and application thereof, and comprises the following steps: reacting formamidinium acetate with HBr to obtain FABr, then adding EDTA-4Na, FABr and PbBr2 into an HBr solution to obtain FAPbBr3 exposing (100) and (111) crystal faces, and finally adding H2PtCl6.6H2O to perform photoreduction to obtain the Pt / FAPbBr3 photocatalytic material exposing (100) and (111) crystal faces. The application realizes the preferential exposure of (100) and (111) crystal faces by regulating the crystal face growth through EDTA-4Na, and improves the carrier separation efficiency by combining with Pt loading, and can be used for photocatalytic decomposition of HBr to produce hydrogen coupled with acetaldehyde oxidation to produce acetic acid, the hydrogen production rate reaches 1033.13 μmol·h ‑ ¹, the apparent quantum efficiency reaches 31.78%, has good stability, and has wide application prospect.

The application discloses an unmanned aerial vehicle hydrogen fuel cell system, a control method and an unmanned aerial vehicle, and belongs to the technical field of unmanned aerial vehicle fuel cells. The system comprises a control unit, a hydrogen supply unit, a fuel cell unit and a power management unit. The control unit is in communication connection with the hydrogen supply unit, the fuel cell unit and the power management unit. The hydrogen supply unit is in communication with the fuel cell unit. The fuel cell unit is electrically connected with the power management unit. The power management unit is used for providing electric energy for the unmanned aerial vehicle. The hydrogen supply unit comprises a storage tank, a reactor and a purification cooler. The storage tank is used for storing solid or liquid hydrogen production reactants. The storage tank is in communication with the reactor. The reactor is in communication with the purification cooler. The purification cooler is in communication with the gas inlet of the fuel cell unit. The system has the characteristics of stable hydrogen release, controllable hydrogen production rate, instant hydrogen supply and high energy density, and solves the problems of traditional fuel cell transportation difficulty, air charging difficulty and poor flexibility.

This invention discloses a core-shell structured catalyst, its preparation method, and a method for photocatalytic decomposition of hydrogen sulfide, belonging to the field of hydrogen sulfide catalytic decomposition technology. The core-shell structured catalyst of this invention comprises a Cu metal nanoparticle core structure and a nitrogen-doped carbon shell structure surrounding the Cu metal nanoparticle core structure, denoted as a Cu@N-C catalyst. The Cu@N-C catalyst provided by this invention can directly catalyze the decomposition of hydrogen sulfide to produce hydrogen and sulfur under photocatalytic conditions, exhibiting a high hydrogen production rate and good stability, and its catalytic activity can be completely restored through simple thermal activation.

The present application relates to the technical field of underground hydrogen development, and is a method for generating hydrogen by injecting peridotite nanofluid into an underground water layer, comprising the following steps: injecting peridotite nanofluid into a target underground saline water layer through an injection well; reacting the peridotite nanofluid with the formation water after being injected into the target underground saline water layer; monitoring the change of formation pressure; and when hydrogen is monitored in a production well, hydrogen is produced. The method can significantly improve the reaction efficiency of peridotite and formation water, shorten the hydrogen production induction time, improve the hydrogen production rate and cumulative hydrogen production, and improve the stability of the system by peridotite nanofluid treatment, surface modifier stable dispersion and synergistic promotion of a nickel source, and in combination with a simulated underground saline water layer environment.

The present application relates to the field of electrochemical engineering, and specifically discloses a kind of PEM electrolytic water hydrogen production system energy efficiency online monitoring method, comprising: by full working condition permeation characteristic experiment, the physical residual network soft measurement model with Fick diffusion law and Henry law hard constraint is constructed, it is converted into.onnx format and deployed to edge gateway;Secondly, real-time acquisition multi-channel working condition signal, after filtering, down-sampling and normalization processing form standardized input vector, online output transient hydrogen permeation flux;Again, according to Faraday's law, hydrogen permeation flux is equivalent to virtual current component, and the effective electrolysis current of real participation electrolysis is obtained after deduction;Subsequently, an external closed loop calibration mechanism is established, and the true value is obtained by a micro gas chromatograph, and only the model output bias is adjusted to correct drift;Finally, based on the effective electrolysis current calculation theoretical hydrogen production rate, combined with the measured value, the real Faraday efficiency is obtained by eliminating the interference of permeation;Real-time monitoring of the real energy efficiency of PEM electrolytic water hydrogen production system is realized.