449 results about "Hydrogen production rate" patented technology

The invention discloses an extended-range hydrogen fuel power ship propulsion system, which relates to the technical field of ship propulsion and comprises an acquisition module, a quantum annealing optimization module and a quantum chip, the acquisition module is used for eliminating noise interference of acquired hydrogen energy ship power parameters through a Kalman filtering algorithm and generating a standardized data packet, and the quantum chip is used for receiving the standardized data packet and outputting the standardized data packet. The method comprises the following steps: mapping hydrogen energy ship power parameters into an Isin model, generating a control instruction according to a hydrogen fuel consumption rate, an equipment life attenuation coefficient and a navigation task priority weight, inputting the control instruction into a simulation model of a proton exchange membrane by a proton membrane regulation and control module, and dynamically regulating a hydrogen production rate and fuel cell power, according to the system, the efficient hydrogen energy closed-loop monitoring unit and the three-level safety protocol are adopted, the response speed and precision are improved, the stability and safety are remarkably enhanced, it is ensured that a ship can reliably operate under the complex working condition, and potential safety risks are reduced.

The invention relates to an ALK and PEM combined series-parallel hydrogen production system operation control method and device, and the method comprises the steps: constructing a multi-electrolytic cell series-parallel hydrogen production array coupling structure by combining the design principles of a single-type ALK and PEM hydrogen production array and an electric pile; the method comprises the following steps: aiming at a multi-electrolytic cell series-parallel hydrogen production array coupling structure, considering the operation characteristics of alkaline and proton exchange membrane electrolytic cells, dividing the combined working state of a series-parallel hydrogen production system, and combining the hydrogen production energy efficiency of two existing electrolytic cells to carry out sub-power section fitting on the hydrogen production rate of the series-parallel hydrogen production system; and performing energy efficiency analysis by taking the fitting result of the power sections as an energy efficiency analysis factor, and according to the combined working state and the energy efficiency analysis, providing a series-parallel hydrogen production system operation control method to realize efficient, flexible and reasonable distribution of the input power by multiple electrolytic cells in a hydrogen production array. The invention provides powerful support for realizing safe, efficient and economic operation and large-scale popularization and application of the series-parallel hydrogen production system.

The invention discloses a high-dispersion nitrogen-doped copper-based catalyst and a preparation method and application thereof.The catalyst is composed of a carrier and an active metal component loaded on the carrier, the carrier of the catalyst is composed of a carbon source and a nitrogen source, and the active metal component is copper; when the carbon source and the nitrogen source are combined to serve as the carrier, copper ions can be complexed with functional groups rich in the carrier, meanwhile, copper is fixed, further growth of copper nanoparticles is inhibited, and therefore the dispersity of copper in the catalyst is improved; the catalyst has high catalytic activity when applied to catalysis of methanol liquid-phase reforming hydrogen production reaction, can reduce the temperature of liquid-phase hydrogen production reaction and ensure that the hydrogen production rate is not lower than 97.70 [mu] mol H2 / gcat / s, the content of carbon monoxide in the product is not higher than 0.0845%, the content of methane is not higher than 0.0034%, and the hydrogen selectivity is high.

The invention discloses a hydrogen production electrolytic cell dynamic performance control method based on an improved particle swarm optimization algorithm, which comprises the following steps of: extracting index parameters of an electrolytic cell, constructing a mathematical model which comprises operating voltage, hydrogen production rate and hydrogen production efficiency, and calculating the dynamic performance of the electrolytic cell according to the operating voltage, the hydrogen production rate and the hydrogen production efficiency. The operating voltage, the hydrogen production rate and the hydrogen production efficiency of the mathematical model are calculated to obtain multi-target optimization parameters for constraining the operating temperature of the electrolytic cell, the weight of existing linear quadratic programming control is optimized through a self-adaptive weight multi-target particle swarm algorithm, the dynamic temperature model of the electrolytic cell is constructed, and the optimal temperature of the electrolytic cell is obtained. And controlling the operating temperature of the electrolytic cell to be within a constrained electrolytic cell operating temperature range through the electrolytic cell temperature dynamic model. According to the method, the weight of linear quadratic programming control is optimized through the self-adaptive weight multi-target particle swarm algorithm, and the electrolytic bath temperature dynamic model is constructed, so that stable and rapid feedback control can be performed on the operating temperature of the electrolytic bath.

The invention discloses an intelligent control and optimization system in aluminum hydrolysis hydrogen production, and relates to the technical field of automatic control, the system comprises a reaction kinetics analysis unit, a fluid field optimization unit and a self-adaptive intelligent control unit; the reaction kinetic analysis unit is used for obtaining the reaction rate of the aluminum powder according to the aluminum powder activity characterization parameters of the aluminum powder; according to the aluminum powder reaction rate, a hydrogen prediction rate is obtained, a bubble growth equation is constructed, and a bubble growth rate is obtained; the fluid field optimization unit is used for analyzing the mass transfer and heat transfer coupling effect in the reaction process, analyzing the influence of stirring on fluid movement, obtaining flow field speed distribution and predicting the reaction progress; and the self-adaptive intelligent control unit is used for dynamically adjusting the stirring speed according to the reaction progress, the reaction pressure, the hydrogen prediction speed, the flow field speed distribution and the aluminum powder activity characterization parameters. The utilization rate and the hydrogen production rate of the aluminum powder are improved.

The invention discloses a three-stage coupling continuous enhanced hydrogen production method. The method comprises the following steps: step 1, preparing an oxygen-free environment; step 2, enrichment and propagation of hydrogenogens; step 3, enrichment and propagation of photosynthetic bacteria; step 4, performing enzymolysis saccharification on the kitchen garbage; 5, carrying out anaerobic dark fermentation to produce hydrogen; step 6, carrying out anaerobic light fermentation to produce hydrogen; and 7, continuously culturing to produce hydrogen. According to the continuous culture principle, hydrogen is continuously and efficiently produced through the dark fermentation tank, the light fermentation tank and the microbial electrolysis cell at the same time, and the method has the advantages of low cost, short fermentation time, complete process and high yield. And when the hydrogen production rate of dark fermentation begins to decrease, the substrate is continuously circulated, and the volatile organic acid generated by terminal metabolism of dark fermentation is consumed by light fermentation, so that the feedback inhibition effect of the volatile organic acid on hydrogenogens is effectively solved. The utilization range of the substrate of the microbial electrolysis cell is wide, thorough oxidation of residual organic matters is realized under the assistance of electricity-producing microorganisms, and the problem of incomplete dark-light coupling anaerobic fermentation can be effectively solved.

The invention discloses a landfill leachate low-carbon intelligent treatment and recycling method based on'end-edge-cloud 'cooperative control. The method comprises the following steps: the terminal layer obtains real-time monitoring data of each sensor and sends the data to the edge layer, the edge layer adopts a machine learning algorithm to perform multi-target prediction on an effluent quality index, system comprehensive energy consumption and an anaerobic hydrogen production rate, and then a target function is constructed to obtain an operating parameter ideal value of each module; according to the ideal value and the real-time monitoring data of the terminal layer sensor, the key process operation condition of the system is adjusted, so that the optimal result of the effluent quality index, the anaerobic hydrogen production rate and the comprehensive energy consumption of the system is obtained. According to the invention, the operation parameters of the biochemical system are optimized and controlled through the'end-edge-cloud 'Internet of Things sensing network, so that the intelligent management and control of the landfill leachate treatment and resource / energy conversion overall process flow are realized, and the dynamic adjustment of key influence factors in the landfill leachate treatment and resource conversion process is realized.

The invention discloses an evaluation method and device for an offshore wind power hydrogen storage and transportation integrated energy system, and the method comprises the steps: obtaining system cost data and wind speed data through a control end in response to an evaluation request, carrying out the interpolation of a fan power curve, and determining the output power of a single fan; according to the output power of the single fan, the seawater desalination consumption power and the compression system consumption power, determining adjustable power; if the hydrogen storage residual capacity is zero, the hydrogen production amount and the online electricity selling power at each moment are determined according to the schedulable power and the energy storage charge state; and if the hydrogen storage residual capacity is not zero, determining the hydrogen production amount and the online electricity selling power at each moment according to the schedulable power, the hydrogen production rated power and the energy storage charge state, and determining a plurality of system economic indexes so as to evaluate the system configuration optimization degree in the evaluation time period. The system is subjected to analogue simulation, so that corresponding system economic indexes are obtained, and the system configuration of the comprehensive energy system is optimized more accurately.

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 relates to the field of new energy hydrogen storage and hydrogen production, in particular to a method for strengthening hydrogen production through hydrazine borane hydrolysis of a high-hydrogen-storage material, which improves the hydrogen production performance of hydrazine borane hydrolysis by increasing an external electric field, not only realizes the improvement of the hydrogen production performance in a traditional hydrazine borane hydrolysis hydrogen production technology, but also can be combined with other methods for use, and has a wide application prospect. The method has the advantages that the steps are simple and convenient, the hydrogen production rate can be conveniently adjusted by increasing the starting and stopping of an external electric field and the intensity of the electric field, the automatic control is easy, the cost is low, and the method is suitable for large-scale popularization and application.

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 preparation method of a nickel-based catalyst and application of the nickel-based catalyst in hydrogen production through ammonia decomposition, and the nickel-based catalyst is a Ni / CeOx catalytic system and is of a Ni-O-Ce atomic-scale dispersed structure; the preparation method comprises the following steps: dispersing a nickel precursor and a Ce precursor in ultrapure water, and stirring and dissolving to obtain a nickel-cerium mixed salt solution A; dissolving sodium hydroxide and sodium carbonate in ultrapure water, stirring and dissolving to form a mixed alkali solution B; heating deionized water, adding the solution A and the solution B at the same time by adopting a dropping funnel, crystallizing, precipitating, drying and grinding to obtain a precursor; and S4, performing reduction treatment on the precursor in the presence of hydrogen, thereby obtaining the product. According to the Ni / CeOx catalytic system constructed by the invention, ammonia gas can be almost completely converted into hydrogen at the flow rate of 10mL min <-1 > and the temperature of 500 DEG C, the conversion rate exceeds the equilibrium conversion rate at the temperature of 550 DEG C, even if the flow rate is increased to 3 times, the performance is not reduced, complete conversion is realized, the hydrogen production rate can be increased without increasing the temperature, and high-efficiency hydrogen production at low temperature is realized.

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 high-density ultrafine-particle-size copper-based catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts. Nitrogen-doped carbon-coated copper nanoparticles are prepared through coordination of polyhydroxy glucose and citrulline with copper ions, drying and in-situ pyrolysis, so that the high-load, high-dispersion, high-density and ultrafine-particle-size copper-based catalyst is obtained. According to the method, growth and leaching of copper nanoparticles under the water phase reforming condition are effectively inhibited, and the hydrogen production performance of the catalyst is greatly enhanced. The catalyst has the advantages of high hydrogen production rate, high hydrogen selectivity and good hydrothermal stability. The high-density ultrafine-particle-size copper-based catalyst is especially suitable for catalyzing hydrogen production through ethanol water phase reforming, the hydrogen production rate reaches 33.8 micromol.gcat <-1 >. S <-1 > under the condition of 210 DEG C, the hydrogen selectivity is higher than 99.9%, and long-time efficient hydrogen production through ethanol water phase reforming is achieved.

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 relates to preparation of a sulfydryl-containing covalent organic framework (COF) and application of the sulfydryl-containing covalent organic framework in photocatalytic full water splitting performance. The invention provides a sulfydryl-containing covalent organic framework material (TFDBD-COF), and aims to solve the problems of low photocatalytic full water splitting efficiency and low visible light utilization rate of the existing covalent organic framework material. The method comprises the following steps: 1, preparing a TFPa-COF material; and 2, preparing the TFDBD-COF material. The two-dimensional covalent organic framework material is applied to the field of photocatalytic complete water splitting, experiments show that the material has excellent photocatalytic complete water splitting performance, the complete water splitting hydrogen production rate can reach 158 [mu] mol.h <-1 >. G <-1 > under visible light irradiation, the oxygen production rate can reach 78 [mu] mol.h <-1 >. G <-1 >, a new thought is provided for development of the two-dimensional covalent organic framework, and the two-dimensional covalent organic framework material has important significance.

The invention discloses a copper-zinc-nickel catalyst as well as a preparation method and application thereof. A carrier of the copper-zinc-nickel catalyst is a ZnO carrier and is loaded with an active component copper-nickel alloy; the loading capacity of the active component copper and nickel is 35-65% of the total mass of the catalyst; the molar ratio of copper to nickel is (8-16): 1; according to the catalyst, high loading and high dispersion of Cu-Ni effective substances are effectively realized, so that the activity of the catalyst is improved by improving active sites, and the particle size of metal is effectively reduced. The copper-zinc-nickel catalyst provided by the invention is especially suitable for hydrogen production by methanol liquid phase reforming, the hydrogen production rate can reach 30.64 [mu] mol.gcat <-1 >. S <-1 > under the condition of 180 DEG C, the hydrogen selectivity reaches 91.82%, and the CO selectivity is less than 9.12%; relates to the technical field of catalysts.

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 provides a Ti2C-coated MoS2 composite material as well as a preparation method and application thereof, and belongs to the technical field of catalytic hydrogen production. The preparation method comprises the following steps: mixing a molybdenum source, a sulfur source, an organic solvent and Ti2C, and reducing under a high-temperature condition to obtain the Ti2C-coated MoS2 composite material. Ti2C and MoS2 are combined to form a heterostructure through a high-temperature reduction reaction, the excellent piezoelectric effect of the heterostructure is utilized, the catalytic activity and stability of molybdenum disulfide are remarkably improved, and the excellent hydrogen production rate is achieved when hydrogen is produced through piezoelectric catalysis of water decomposition. The result of the embodiment shows that the hydrogen production rate of the Ti2C-coated MoS2 composite material prepared by the preparation method disclosed by the invention can reach 870.09 [mu] mol.g <-1 >. H <-1 >.

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 Joule hot ammonia decomposition hydrogen production reactor applied to a mobile end in the technical field of ammonia decomposition hydrogen production. The Joule hot ammonia decomposition hydrogen production reactor comprises an inlet end cover, a shell, an insulating seat, an ammonia gas inlet, an outlet end cover, a positive electrode, a negative electrode, a decomposed gas outlet, a conductive overline, a reaction channel, an ammonia gas inlet cavity, a supporting plate, a tube plate, a decomposed gas outlet cavity and an alloy carrier support. Heat is directly supplied to the ammonia decomposition reaction in the mode that the conductive alloy carrier is electrified to generate Joule heat, the heat transfer process is reduced to the maximum extent, the temperature of a catalyst bed can be rapidly increased, energy loss and starting time are reduced, and the device has the advantages of being rapid in response, simple in structure, high in hydrogen production rate per unit volume and the like.

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.

A hydrogen charging method and system, the method comprising: measuring a value of pressure in a hydrogen charging pipe in real time at intervals; when the value of pressure in the hydrogen charging pipe is greater than or equal to an upper limit standard pressure threshold value, producing hydrogen at a second hydrogen production rate smaller than a first hydrogen production rate, and charging hydrogen into a hydrogen storage device at a second hydrogen charging rate smaller than a first hydrogen charging rate; when the value of pressure in the hydrogen charging pipe is smaller than a lower limit standard pressure threshold value, producing hydrogen at a rate increased by a preset increment on the basis of the second hydrogen production rate; and performing hydrogen charging until a solid hydrogen storage material in the hydrogen storage device reaches a hydrogen absorption saturation state. A hydrogen production and hydrogen charging control method and system, the method comprising: controlling a hydrogen production module to charge hydrogen into a hydrogen storage module, and measuring the current hydrogen content of the hydrogen storage module in real time; acquiring the current pressure and a pressure increase rate of the hydrogen storage module in real time; and when the current pressure of the hydrogen storage module is not smaller than a first pressure threshold value, controlling the power of the hydrogen production module to be reduced, and when the current pressure of the hydrogen storage module is not greater than a second pressure threshold value, controlling the power of the hydrogen production module to increase until the current pressure of the hydrogen storage module is between the first pressure threshold value and the second pressure threshold value and the pressure increase rate of the hydrogen storage module is a reference rate.

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.

The invention discloses a method for promoting sludge catalytic cracking and reforming to efficiently produce hydrogen by using sludge pyrohydrolysis byproduct melanin, and belongs to the field of organic solid waste energy recovery. Aiming at the problems that melanin in a high-temperature pyrohydrolysis-pyrolysis process inhibits sludge decomposition, pyrolysis gas components are complex and H2 directional regeneration is difficult, the byproduct melanin in the high-temperature pyrohydrolysis process is extracted and is used for enhancing the pyrolysis gas production efficiency of the pyrohydrolysis sludge. The sludge is subjected to low-temperature pyrohydrolysis treatment, the surface is loose, and the organic matter devolatilization degree is enhanced, so that solid-phase pyrolysis gas production of the pyrohydrolysis sludge is promoted. Furthermore, the melanin-like compound shows excellent reaction catalytic activity due to carboxyl and a nitrogen-containing structure, the optimal effect is achieved when the concentration is 2.5 mg / g DW, the total gas production rate is increased by 6.54%, the melanin-like compound induces pyrohydrolysis sludge cracking mixed gas to generate methane catalytic cracking CH4-> C + 2H2 and catalytic reforming CH4 + CO2-> 2CO + 2H2 reactions, and the hydrogen yield is increased by 35.92% at most. The method effectively solves the engineering bottleneck problems of melanin-like negative effects in the thermal hydrolysis-pyrolysis field and low green energy recovery rate.

The invention belongs to the field of photocatalytic materials, and particularly relates to a silver metavanadate composite cadmium sulfide photocatalytic material as well as a preparation method and application thereof in photocatalytic hydrogen production. The preparation method comprises the following steps: taking a sulfur source and a cadmium source, adding ethylenediamine, and uniformly stirring and mixing; transferring the mixture into a hydrothermal reaction kettle for reaction, after the reaction is finished, obtaining turbid liquid, and centrifugally washing and drying the turbid liquid to obtain cadmium sulfide powder; the preparation method comprises the following steps: adding water into cadmium sulfide, adding a silver source and a vanadium source under a stirring condition, stirring, transferring into a reaction kettle, carrying out a hydrothermal reaction, centrifuging, washing and drying to obtain the silver metavanadate composite cadmium sulfide photocatalytic material. The photocatalytic material disclosed by the invention has a relatively obvious catalytic effect in a 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 water decomposition of the photocatalyst reaches 228.8 mu mol / g / h, which is obviously superior to that of a pure cadmium sulfide catalyst.

The invention discloses a preparation method of a monatomic supported titanium dioxide composite catalyst. The preparation method comprises the following steps: dispersing TiO2 in a proper amount of deionized water at room temperature, adding a (NH4) 2CO3 solution with a certain concentration to adjust the pH value, uniformly stirring, dropwise adding a metal precursor solution, stirring, and reducing in a hydrogen-argon mixed atmosphere to finally obtain the metal single atom loaded titanium dioxide composite photocatalyst. The preparation method is simple in preparation process, easy to quantify, good in repeatability and stable in performance, and compared with corresponding pure TiO2, the hydrogen production rate of the obtained monatomic supported catalyst is remarkably improved in a water photolysis experiment.