262 results about "Hydrogen production rate" patented technology

The invention discloses a method for synthesizing a Mn0. 43Cd0. 57S / Cu2MoS4 photocatalyst by adopting a solvothermal method, and belongs to the technical field of catalysts. The preparation method comprises the following steps: preparing copper molybdenum sulfide by using cuprous oxide as a template, synthesizing copper molybdenum sulfide with high purity and good crystallinity by combining a solvothermal method, preparing manganese cadmium sulfide by using manganese acetate, cadmium acetate, sodium hydroxide and thioacetamide as raw materials, adding copper molybdenum sulfide before a hydrothermal reaction, successfully modifying the manganese cadmium sulfide by constructing a heterojunction, and preparing the copper molybdenum sulfide modified manganese cadmium sulfide. The Mn0. 43Cd0. 57S / Cu2MoS4 photocatalyst is synthesized, and the photocatalytic hydrogen production rate of the cadmium manganese sulfide is improved. Moreover, the hydrogen production rate of the Mn0. 43Cd0. 57S / Cu2MoS4 photocatalyst prepared by the invention can reach 8233 mu mol / (g.h), which is 2.08 times of the hydrogen production rate of pure cadmium manganese sulfide, and 1.24 times of the hydrogen production rate of cadmium manganese sulfide loaded with 1% platinum.

The invention provides a new energy station load stability control method and system based on mutual conversion of electricity and hydrogen energy. Obtaining a generated power prediction curve of the new energy power generation facility, and determining a power difference value between the new energy power generation load and the power grid stability demand based on the prediction curve; a surplus hydrogen production electricity consumption instruction is issued, the operation number and the hydrogen production rate of an electric hydrogen production module are dispatched, and surplus electric energy is converted into hydrogen energy to be temporarily stored; receiving a real-time charging demand signal, dynamically issuing a charging permission load instruction based on the current new energy power generation load and the hydrogen gas turbine power generation load, and scheduling the power output of each charging pile; and according to the real-time states of the new energy power generation load, the electrical hydrogen production electrical load, the charging pile electrical load and the hydrogen gas turbine power generation load, starting, stopping and output power of the hydrogen gas turbine are adjusted, and reverse compensation of the new energy fluctuation power is achieved. New energy power generation fluctuation can be effectively stabilized, abandoned wind and abandoned light are reduced, and stable power supply of the distributed charging pile is achieved.

The invention provides a hydrogen production rate-based dynamic adjustment method for an alkaline electrolytic cell, which comprises the following steps of: constructing a function model of electric power and hydrogen production rate of the alkaline electrolytic cell, optimizing the array configuration of the electrolytic cell in combination with historical wind and light data, dividing the operating state of a single electrolytic cell, and dynamically distributing the operating state in a value rotation mode. And the matching between the wind-solar power and the hydrogen production requirement is realized. The method comprises the following specific steps: constructing a power-hydrogen production rate mapping model to predict power consumption demands; determining the capacity of the electrolytic cell array based on the wind-solar power peak; distributing the number of the electrolytic cells in each state through a circular queue rotation strategy; and adjusting the operation power instruction according to the hydrogen production rate working condition. The system does not need an energy storage device, the wind and light fluctuation is absorbed through the self-state combination of the electrolytic cell array, and the problems of high cost, non-uniform equipment loss, high electrolytic cell monomer loss difference and the like caused by energy storage dependence in the traditional technology are solved.

The invention provides a garbage pyrolysis gasification multi-stage directional regulation-gas-solid phase reforming synergistic hydrogen production treatment process which comprises the following steps: first-stage regulation: pretreatment and graded feeding: crushing, sorting, drying and catalytic coating treatment are performed on garbage through a physical-chemical directional means; second-stage regulation and control: performing low-temperature pyrolysis directional dechlorination, and performing thermochemical directional conversion on plastic and biomass garbage at 350-450 DEG C; third-stage regulation and control: gasifying and melting are coordinated and oriented, and a gas-solid phase coupling reaction is realized in double fluidized beds at 800-900 DEG C; four-stage regulation and control: multi-stage gas-solid phase reforming is carried out, and the hydrogen yield is increased through catalysis-adsorption synergistic effect in a 700 DEG C moving bed; and five-stage regulation and control: deep purification and hydrogen purification, wherein the synthesis gas is selectively oxidized by utilizing chemical looping combustion to release hydrogen with the purity being greater than or equal to 99.99%. According to the invention, the molten ash is used as a catalytic carrier, and the Fe-Ce active sites of the molten ash are utilized to synchronously realize tar cracking and synthesis gas reforming, so that the conversion rate of tar is effectively improved.

The invention discloses a double-vacancy ZnCdS solid solution photocatalyst and a preparation method and application thereof.The preparation method comprises the steps that a cadmium source, a zinc source and a sulfur source are added into absolute ethyl alcohol to be stirred and dissolved, the mass ratio of the cadmium source to the zinc source to the sulfur source is 1: 9: 3, a reaction is conducted under the water bath condition of 70-90 DEG C, suction filtration, washing and drying are conducted, and a powdery ZnCdS solid solution is obtained; the preparation method comprises the following steps: adding NaOH into water, stirring and dissolving, then adding the powdery ZnCdS solid solution, carrying out ultrasonic treatment, and carrying out suction filtration, washing and drying to obtain the double-vacancy ZnCdS solid solution photocatalyst. The preparation method has the advantages of being high in hydrogen production rate, good in repeatability and stability, simple and convenient to prepare, low in cost and the like, the obtained double-vacancy ZnCdS solid solution photocatalyst can be applied to the field of photocatalytic hydrogen production, and the hydrogen production efficiency reaches up to 12.69 mmol.g <-1 >. H <-1 > and is 23.94 times that of pure ZnS and 11.64 times that of pure CdS.

The invention discloses a collaborative operation method, system, equipment and medium for an electricity-hydrogen storage integrated system, and relates to the technical field of electricity-hydrogen storage, comprising the steps of generating total output power based on environmental parameters by integrating photovoltaic power generation and wind power generation, performing electric energy conversion treatment on the total output power, and supplying the converted electric energy to a water electrolysis hydrogen production process. Hydrogen is generated by electrolyzing water, the hydrogen production rate is monitored in real time, the generated hydrogen is stored, the hydrogen storage pressure is adjusted according to a dynamic pressure model, the stored hydrogen is supplied to the fuel cell power generation process, electric energy is generated according to the load requirement, and through the cooperative control process and based on a multi-stage optimization control framework, the power generation efficiency of the fuel cell is improved. And power generation, conversion, hydrogen production, storage and power generation processes are cooperatively controlled in real time. According to the method, the problems of renewable energy fluctuation absorption and efficient conversion are solved, the breakthrough improvement of millisecond-level real-time response is realized, and the safety and economy of long-term operation of the system are guaranteed.

The invention provides a hydrogen production control method and related equipment, the hydrogen production control method is applied to a hydrogen production system, the hydrogen production system comprises a first valve and a second valve which are used for adjusting the internal pressure, the pressure adjusting speed of the second valve is larger than that of the first valve, and the hydrogen production control method comprises the steps that in the process that the hydrogen production system generates target gas, the target gas is generated; and controlling the hydrogen production rates of the first valve, the second valve and the hydrogen production system to adjust the internal pressure, so that the adjusted internal pressure of the hydrogen production system is within a preset target pressure range of the hydrogen production system. According to the technical scheme, the first valve and the second valve with different pressure adjusting speeds are adopted, and the internal pressure of the hydrogen production system is adjusted by combining the hydrogen production rate, so that the internal pressure of the hydrogen production system can be reasonably adjusted and stabilized to the preset target pressure range, and a better hydrogen production effect is achieved.

The invention relates to a method (100) for controlling the capacity utilisation of electrolysis units of an electrolysis system, wherein the electrolysis system has a control device and a plurality of electrolysis units, each of which can be selected by the control device; comprising providing current individual hydrogen production rates when there are cell voltage values individual to the selected electrolysis units depending on a common controlled variable, selecting (106) a number of electrolysis units from the plurality of electrolysis units taking into account a settable target hydrogen production rate or a settable target total electrical power consumption; and adapting (110) the common controlled variable depending on a deviation of a current total hydrogen production rate of the number of selected electrolysis units from the settable target hydrogen production rate or depending on a deviation of a current total electrical power consumption of the number of selected electrolysis units from the settable target total electrical power consumption. The common controlled variable is a target cell voltage value common to the number of selected electrolysis units, and the number of selected electrolysis units are operated at respective individual cell voltage values which are continuously adjusted to the common target cell voltage value (112).

The invention discloses a double-channel electrolytic cell hydrogen production control method and device and a storage medium in the technical field of new energy hydrogen production control. The method comprises the steps that initial power instructions of a proton exchange membrane electrolytic cell and an alkaline electrolytic cell are obtained; dynamically correcting the initial power instruction according to a preset start-stop control rule and a constraint condition to obtain actual power output; obtaining a hydrogen production rate based on the actual power output; and inputting the hydrogen production rate into a pre-constructed energy conversion efficiency maximization objective function, and solving to obtain the optimal actual power distribution under the condition of satisfying a constraint function of minimizing the unit hydrogen production cost. The technical problems that most control strategies of an existing wind-solar coupled hydrogen production system aim at single electrolysis equipment, adaptability is poor, operation and maintenance cost is high, and economical efficiency and operation efficiency are difficult to balance can be solved.

The embodiment of the invention provides an alkaline electrolytic cell dynamic adjustment method based on cost optimization. According to the method, a function model of electricity utilization power and hydrogen production rate is constructed, historical wind and light data are combined to optimize electrolytic cell array configuration, electrolytic cell monomer operation states are divided, a cost model is introduced, the lowest total operation cost is taken as a target, and the number of electrolytic cells in each state is dynamically distributed through a circular queue rotation strategy. The method comprises the following specific steps: establishing a power-hydrogen production rate mapping model to predict a power demand; determining the capacity of the electrolytic cell array based on the wind-solar power peak; and constructing a cost model and setting a state allocation priority and the number of electrolytic cells in each state to realize graded regulation and control of the hydrogen production rate working condition. The system does not need an energy storage device, the wind and light fluctuation is absorbed through the self-state combination of the electrolytic cell array, and the problems of high investment cost, non-uniform equipment loss, high operation cost and the like caused by energy storage dependence at present are solved.

The invention relates to a preparation method of a nickel-calcium catalyst and application of the nickel-calcium catalyst in catalytic gasification hydrogen production of plastics, and the preparation method comprises the following steps: dissolving nickel and calcium metal precursors in a solvent to form a mixed solution, adding a complexing agent and continuously stirring, carrying out gelation treatment to obtain precursor gel, and sequentially drying and calcining to obtain the nickel-calcium catalyst. The nickel-calcium catalyst with the porous structure is prepared. The nickel-calcium catalyst shows excellent performance in the field of ex-situ catalytic plastic gasification hydrogen production: the nickel-calcium catalyst is long in service life, and the hydrogen yield after 10 cycles is kept at 81% of the initial hydrogen yield; the regeneration capacity is high, the regeneration temperature is only 650 DEG C, and the activity of the regenerated catalyst can be completely recovered to the initial state; compared with the prior art, the method has the advantages that the application condition is mild, the catalytic temperature is reduced by 150-250 DEG C, the energy consumption is reduced by 20-30%, the cost of the plastic hydrogen production technology can be reduced by utilizing the efficient catalysis and cyclic regeneration technology, an efficient and sustainable solution is provided for resource utilization of plastic wastes, and the method has outstanding industrial application value.

This invention belongs to the field of photocatalytic materials and new energy technology, and discloses a method for preparing a Rh-modified Cs₂AgBiBr₆ / CdS heterojunction photocatalyst. The method includes: preparing Cs₂AgBiBr₆ nanoparticles via antisolvent precipitation, preparing CdS nanorods via hydrothermal method, subsequently constructing a heterojunction through in-situ growth, and loading a Rh co-catalyst using photoreduction. This invention effectively overcomes the technical bottleneck of structural instability of traditional perovskites in polar solvents by introducing a Cs₂AgBiBr₆ double perovskite with a rigid lattice structure. Experiments show that the catalyst retains its structural integrity after immersion in ethanol for 168 hours and under different atmospheres, and exhibits excellent performance in the photocatalytic dehydrogenation of ethanol, with a hydrogen production rate as high as 49.15 mmol·g⁻¹. ‑1 ·h ‑1 The apparent quantum efficiency at 420 nm is 22.5%, and it remains stable during a 60-hour continuous reaction. This invention provides a new strategy for developing efficient and stable lead-free perovskite photocatalytic systems.

The present invention discloses a method and a system for producing hydrogen by a biomass combined process. The method first pre-treats biomass raw materials and then enters a carbonization reactor for carbonization. The solid product obtained by carbonization further enters a gasification reactor for gasification reaction. The gas-phase material obtained by the gasification reaction is subjected to a water-gas shift reaction and pressure swing adsorption treatment to obtain a hydrogen product. The present invention converts biomass into a high-value-added hydrogen product through a carbonization-gasification-purification and purification combined process, and has the advantages of simple process, high hydrogen production rate and purity, and high energy utilization rate.

The invention discloses a recycling and silicon elementary substance recycling method based on waste aluminum-silicon alloy hydrolysis hydrogen production. Aluminum-silicon alloys such as ZL102 and the like are widely applied in many fields due to excellent processability and corrosion resistance of the aluminum-silicon alloys, however, a large amount of waste aluminum alloys are generated due to large-amount application of the aluminum-silicon alloys, and how to recycle the aluminum-silicon alloys is a key technical problem of improving energy utilization. The high-silicon aluminum alloy and the low-melting-point metal are combined to prepare the novel aluminum-based alloy used in the field of hydrolysis hydrogen production, the hydrogen production efficiency can reach 92.4% at most by regulating and controlling the content of the low-melting-point metal, and the hydrogen production rate can reach 396 ml / (min.g); the problems that a traditional waste aluminum recycling technology is complex in process and high in energy consumption, and a large amount of aluminum needs to be diluted to be utilized in a preserve mode are effectively solved, and a new recycling way is provided. Meanwhile, the monatomic silicon is separated and recovered by adopting an acid pickling method, the recovery rate is 97.6%, and the purity of the monatomic silicon can reach 94.3%.

The invention provides a bimetal oxygen carrier, a preparation method thereof and a methane chemical looping hydrogen production method, and belongs to the technical field of oxygen carriers and chemical looping hydrogen production. The preparation method of the bimetal oxygen carrier comprises the following steps: in a vacuum environment, introducing a bimetal salt mixed solution into a reactor containing an inert carrier, a binder and a pore-forming agent, and uniformly mixing to obtain an initial mixed solution; adding an alkaline precipitator into the initial mixed solution, and adjusting the pH value to generate an initial mother solution existing in a paste slurry form; performing ultrasonic stirring treatment on the initial mother liquor to obtain finished mother liquor; filter-pressing and washing the finished product mother liquor to obtain a filter cake and filtrate; and extruding, granulating, drying and calcining the filter cake to obtain the bimetal oxygen carrier. According to the invention, nanoscale mixing of the active component and the inert carrier in the oxygen carrier is realized, the product yield and the active component content of the oxygen carrier are ensured by virtue of pasty finished product mother liquor hydraulic filtration, extrusion molding and drying calcination, and the obtained oxygen carrier can improve the reaction stability and the hydrogen production rate.

A ZIF-derived zinc-cadmium sulfide photocatalyst, its preparation method, and its application are disclosed. The catalyst, by molar fraction, comprises: 35-50% 2-methylimidazole; 0-7.7% divalent cadmium ion compound; 0-7.7% divalent zinc ion compound; 7-10% thioacetamide; and 35-50% amines. The preparation method involves: preparing a 2-methylimidazole solution and a cadmium-zinc mixed solution separately; then preparing a ZIF precursor solution with cadmium and zinc as the central metals; adding thioacetamide to the precursor solution; transferring the solution to a polytetrafluoroethylene liner and hydrothermally treating it; finally collecting the hydrothermally treated solution, centrifuging, washing, drying, and grinding to obtain the ZIF-derived zinc-cadmium sulfide photocatalyst. The catalyst prepared by this invention has a large specific surface area and exhibits significant catalytic effects in photocatalytic water splitting for hydrogen production. Furthermore, the catalyst has a stable structure and can be recycled for a long period without a significant decrease in the hydrogen production rate.

The application relates to a kind of operation control method and device of mixed hydrogen production system of ALK combined PEM, comprising: the design principle of combining single type ALK, PEM hydrogen production array and electric pile, constructs the hydrogen production array coupling structure of multiple electrolytic cell mixed connection;For the hydrogen production array coupling structure of multiple electrolytic cell mixed connection, the operating characteristics of alkaline and proton exchange membrane electrolytic cell are considered, the combined working state of mixed hydrogen production system is divided, the hydrogen production rate of mixed hydrogen production system is fitted in power section in combination with the hydrogen production energy efficiency of existing two electrolytic cells;The result of fitting in power section is used as energy efficiency analysis factor to carry out energy efficiency analysis, according to the combined working state and energy efficiency analysis, the operation control method of mixed hydrogen production system is proposed, the efficient and flexible reasonable distribution of input power in multiple electrolytic cells in hydrogen production array is realized.The application provides strong support for realizing safe, efficient and economic operation and large-scale popularization and application of mixed hydrogen production system.

The invention discloses a preparation method of a step-by-step activated tungsten-based catalyst. The preparation method comprises the steps of substrate pretreatment, first-stage activation, second-stage activation and the like. Through the mode, the preparation method of the step-by-step activated tungsten-based catalyst disclosed by the invention has the advantages that the synthesized catalyst shows excellent durability and catalytic activity under a weakly alkaline condition, and the decomposition reaction of nickel-tungsten active sites for catalyzing urea and other organic pollutants is effectively accelerated through the multi-stage active sites, so that the wastewater purification efficiency is improved; the electrochemical hydrogen production performance is remarkably improved, and the removal rate of organic pollutants and the hydrogen production rate are synchronously improved.

The invention provides a plate-type hydrogen production reactor integrating pin-fin flow-equalizing combustion and perforated plate partition reforming, and belongs to the technical field of fuel cells and distributed hydrogen supply systems. The reactor sequentially comprises a combustion chamber, a reforming chamber, a combustion chamber, an evaporation chamber and a combustion smoke collecting chamber from top to bottom, the combustion chamber and the evaporation chamber adopt transverse snake-shaped runners, pin-fin structures for enhancing heat transfer and turbulent flow are arranged on the surfaces of runner plates, the combustion chamber realizes left-right shunting through a middle partition plate, pin-fins are non-uniformly distributed with dense middle parts and sparse two ends, and the density of the pin-fins in the evaporation chamber is uniformly distributed; the structure of the combustion smoke collecting chamber is consistent with that of the evaporation chamber; the reforming chamber adopts vertical snakelike runners which are symmetrically distributed left and right, and a perforated plate is arranged in the middle of the runner in the depth direction. Through non-uniform distribution of the pin fins, partitioned catalysis of the porous plates and compact plate type laminated design, the mixing and reaction efficiency of reactants is remarkably improved, and the reactor has the advantages of compact structure, high hydrogen production rate and suitability for integrated application.

This invention discloses a Sn3O4-Ag-Ag2O photoelectric material based on TiO2 nanotubes and its preparation method, belonging to the field of photoelectric materials technology. The invention uses a hydrothermal Sn3O4-Ag-Ag2O nanoparticle method on a TiO2 nanotube array to construct an indirect Z-type heterojunction. The material exhibits high photocatalytic activity in dye degradation and water decomposition to produce hydrogen. The prepared sample showed strong photocatalytic ability and stability in organic dye degradation and Cr(VI) removal, with a visible light-driven photocatalytic hydrogen production rate of 55.79 μmol·cm ‑2 ·h ‑1 Photoelectrocatalytic data and electron spin resonance (ESR) signal results indicate that the composite photoelectrode forms an indirect Z-type electron transfer pathway, providing guidance for the preparation of composite photoelectrode materials with high optical and photocatalytic properties. The Z-type heterojunction structure will show broad application prospects in the design and application of photocatalysts.

The invention provides an intelligent filtering control method for a hydrogen storage tank of a wind-solar coupled electrolytic hydrogen production system, which comprises the following steps: designing a filter, dynamically adjusting the cut-off frequency of the filter according to the time constant of the hydrogen storage tank, and finding the optimal filter order through an optimization mechanism; the current working condition is judged according to the hydrogen charging and discharging state of the hydrogen storage tank, and a proper type is selected from an FIR filter, an IIR filter and a self-adaptive hybrid filter according to different working conditions; the hydrogen production process is filtered, and the hydrogen charging and discharging amount of a hydrogen storage tank is adjusted according to the difference between the target hydrogen production rate and the actual hydrogen production rate, so that smooth hydrogen output is obtained; and evaluating the performance of the hydrogen production system according to the fluctuation ratio in the hydrogen output process, and readjusting the parameters of the filter according to the evaluation result. According to the invention, appropriate filter types are dynamically selected according to different working conditions, so that a relatively smooth hydrogen output rate is realized, the stability of the system is ensured, and the requirements of subsequent large-scale industrial production are met.

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 invention discloses a hydrolysis hydrogen production aluminum alloy and a preparation method thereof, and belongs to the technical field of hydrolysis hydrogen production. The hydrolysis hydrogen production aluminum alloy comprises the following raw materials in parts by weight: 80-98 parts of Al, 5-10 parts of Ga, 1-10 parts of In, 0.1-5 parts of Sn and 0.1-5 parts of Zn. The preparation method specifically comprises the following steps: (1) weighing the raw materials according to the parts by weight of the hydrolysis hydrogen production aluminum alloy; and (2) mixing the raw materials, carrying out mechanical ball milling, and carrying out 3D printing. According to the method, the aluminum alloy powder is mixed through a mechanical ball milling method, then the aluminum alloy powder is made into a honeycomb or other complex porous structure through the 3D printing technology so as to increase the specific surface area, and then the reaction rate of the aluminum alloy and water and the hydrogen production efficiency are improved. According to the hydrolysis hydrogen production aluminum alloy, the formation of an inert oxidation film can be well inhibited, the hydrogen production rate of unit mass alloy can be greatly improved through reaction at the normal temperature, and meanwhile a hydrogen supply device integrating start-stop controllability and product recovery is designed according to the aluminum water reaction characteristics.

The invention discloses a photocatalyst for hydrogen production by reforming a formaldehyde solution and a preparation method of the photocatalyst, and belongs to the crossing field of catalyst preparation and a hydrogen energy technology. The photocatalyst is a bimetallic structure material with different Mn and Ni molar ratios, and the molecular formula of the photocatalyst is MnxNiy / C3N4. The preparation method comprises the following steps: adding manganese acetate and nickel chloride in different proportions to adjust the feeding ratio of Mn to Ni in the catalyst, uniformly dispersing the mixture in deionized water containing C3N4, dropwise adding a sodium borohydride solution, continuously stirring to obtain a precursor, and calcining in a hydrogen atmosphere to obtain the catalyst. The photocatalyst can synchronously realize formaldehyde degradation and stable hydrogen production, and the hydrogen production rate can reach 134.53 mmol.h <-1 >. G <-1 >. The photocatalyst shows excellent photocatalytic formaldehyde reforming hydrogen production performance under the mild reaction condition without a sacrificial agent, the problem that a traditional catalyst depends on the sacrificial agent can be solved, and the dual benefits of pollutant degradation and clean energy preparation can be achieved through efficient conversion of formaldehyde.

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 invention provides a preparation method of a supported catalyst Pt1 / In2O3-ZrO2 and application of the supported catalyst Pt1 / In2O3-ZrO2 in hydrogen production by methanol water phase reforming, and particularly relates to a noble metal selective loading mode, especially a bimetallic oxide carrier with different band gaps, and a photo-assisted deposition mode is utilized to prepare the supported catalyst Pt1 / In2O3-ZrO2. And the noble metal is preferentially loaded on the surface of the oxide with lower band gap to realize the preparation of the target catalyst. The Pt / In2O3-ZrO2 catalyst is successfully prepared by utilizing the strategy, Pt is mainly selectively loaded on the surface of In2O3 through a spherical aberration electron microscope and a catalytic performance test, the CO selectivity of methanol water phase reforming hydrogen production is successfully reduced, and meanwhile, the generation rate of hydrogen is increased. Through a simple photo-assisted deposition mode, the problem of metal selective loading can be solved, meanwhile, the target catalyst prepared through the strategy can effectively improve the selectivity of a product, and the problem that activity and selectivity are difficult to consider at the same time is solved.

The present invention discloses a low-carbon intelligent treatment and resource utilization method for landfill leachate based on "end-edge-cloud" collaborative control. The method is that the terminal layer obtains real-time monitoring data of each sensor and sends it to the edge layer, and uses a machine learning algorithm at the edge layer to perform multi-objective prediction of effluent water quality indicators, system comprehensive energy consumption, and anaerobic hydrogen production rate, and then constructs an objective function to obtain the ideal value of the operating parameters of each module; according to the ideal value and the real-time monitoring data of the terminal layer sensors, the key process operating conditions of the system are adjusted to obtain the optimal results of effluent water quality indicators, anaerobic hydrogen production rate, and system comprehensive energy consumption. The present invention optimizes and controls the operating parameters of the biochemical system through the "end-edge-cloud" Internet of Things perception network, realizes the intelligent management and control of the overall process of landfill leachate treatment and resource / energy utilization, and realizes the dynamic adjustment of key influencing factors in the process of landfill leachate treatment and resource utilization.

The invention provides a non-noble metal catalyst for hydrogen production through catalytic decomposition of sodium borohydride, and a preparation method and application thereof, and belongs to the technical field of hydrogen production. The cobalt-boron catalyst is loaded on the nitrogen-doped porous carbon material, so that the hydrogen production rate and stability of the catalyst can be greatly improved, the highest hydrogen production rate is 5772 mL * min <-1 > * g <-1 >, and the catalyst can still keep relatively high activity after being recycled for 4 times.