136 results about "Hydrogen production rate" patented technology

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 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.

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 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 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 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 discloses a full-sea-depth metal hydrogen manufacturing device which comprises an upper shell and a lower shell which are assembled together, a water inlet hole communicated with the outside is formed in the upper shell or the lower shell to form an open structure, clamping grooves are correspondingly formed in the upper shell and the lower shell, an anode and a counter electrode are arranged in the clamping grooves in the two sides respectively, and the anode and the counter electrode are arranged in the clamping grooves in the two sides respectively. A bipolar electrode composed of a diaphragm, an anode and a counter electrode is inserted into the middle clamping groove, the anode and the counter electrode are clamped on the two sides of the diaphragm, the anode and the counter electrode are connected through a conductive connecting piece penetrating through the diaphragm, and the connecting piece in the upper shell and the connecting piece in the lower shell are connected with a controller through a watertight cable. The device is of an open structure, the internal and external pressure difference of the device is eliminated, seawater serves as electrolyte, the electrolyte does not need to be carried, and the hydrogen production rate can be adjusted through the controller.

The invention relates to the technical field of energy conversion and storage, and discloses a dynamic adjustment method, system and device for hydrogen production through water electrolysis, and the method comprises the following steps: receiving a downstream real-time hydrogen demand signal, an actual hydrogen production rate and an electrolytic bath health state vector; predicting a future hydrogen demand sequence by using a hydrogen demand prediction model based on the signal and historical data; determining an optimal target hydrogen production rate by solving an optimization function according to the prediction sequence in combination with an electrolytic cell performance model; taking the optimal target hydrogen production rate as a set value, executing a closed-loop control algorithm, and generating a regulation control instruction; and controlling the hydrogen production task to be smoothly switched from the main electrolytic cell group to the standby electrolytic cell group under a certain condition. By integrating demand prediction, dynamic optimization and intelligent diagnosis, prospective fine adjustment of the hydrogen production process is realized, and the energy utilization efficiency, the system response speed and the hydrogen supply continuity and reliability are remarkably improved.

The invention relates to the field of filter materials, in particular to a photocatalyst-loaded filter screen and a preparation method thereof.The photocatalyst-loaded filter screen comprises a filter screen body and a photocatalyst coating, the photocatalyst coating is loaded on the surface of the filter screen body in the form of gel, the gel is formed by co-doped sol, and the photocatalyst coating is coated on the surface of the filter screen body. The co-doped sol is obtained by carrying out hydrolysis-polycondensation reaction on an ethanol mixed solution of tetrabutyl titanate, magnesium nitrate, ferric nitrate and urea, and the molar ratio of Ti to Mg to Fe to N in the ethanol mixed solution is 100: 3: 2: 5. According to the photocatalyst-loaded filter screen disclosed by the invention, Ti, Mg, Fe and N are co-doped, so that the formaldehyde degradation rate of the material is synergistically improved on the basis of improving the hydrogen yield of the material, and the photocatalytic activity and the spectral response range are simultaneously improved.

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.

The present application relates to a kind of COF-316 / Pt@TpBpy-COF composite material preparation and photocatalytic decomposition of water.The present application provides a new COF-316 / Pt@TpBpy-COF composite material, to solve the problem of low light utilization and electron hole easy recombination when existing TpBpy-COF photocatalytic decomposition of water.Method: one, the preparation of Pt NPS;Two, the preparation of COF-316;Three, the preparation of COF-316 / Pt@TpBpy-COF composite material.The preparation process of the present application is simple and effective, reagent consumption is less and performance is high;And the photocatalyst provided by the present application can effectively improve the problem of low photocatalytic decomposition of water efficiency.The present application is applied to the field of photocatalytic decomposition of water, and experiment shows that the composite material has excellent photocatalytic decomposition of water performance, and the decomposition water hydrogen production rate can reach 220.4 μmol·h ‑1 ·g ‑1 Under visible light irradiation, and the oxygen production efficiency is 101.5 μmol·h ‑1 ·g ‑1 .

The invention provides a spherical polyhedral strontium titanate single crystal particle as well as a preparation method and application thereof. The preparation method of the spherical polyhedral strontium titanate single crystal particles comprises the following steps: mixing a titanium source, a strontium source, a morphology regulating agent, an aluminum source and alkali liquor, and carrying out ultrasonic dispersion to obtain a mixed solution; carrying out hydrothermal reaction on the mixed solution, and then washing and drying to obtain the spherical polyhedral strontium titanate single crystal particles. The regular spherical polyhedral strontium titanate single-crystal particles are prepared by adopting a hydrothermal method and utilizing a titanium source, a strontium source and an aluminum source, effective exposure of a plurality of micro crystal faces with different orientations such as (100), (110) and (111) is realized, and the regular spherical polyhedral strontium titanate single-crystal particles are applied to the field of photocatalysis and can show an efficient water photolysis hydrogen production rate under a sun illumination condition.

The utility model discloses methanol-water hydrogen production equipment which comprises a mixing station, a heat exchanger, an electric heating device, a reactor and a purification device, the mixing station is used for containing methanol-water mixed liquor, and the mixing station, the electric heating device, the reactor and the purification device are sequentially communicated through pipelines. The electric heating device is used for electrically heating a mixed solution of methanol and water to react to generate crude hydrogen so as to purify hydrogen, the heat exchanger is provided with a cold source channel and a heat source channel, and the cold source channel of the heat exchanger is arranged on a pipeline between the mixing station and the electric heating device; a heat source channel of the heat exchanger is arranged on a pipeline between the reactor and the purification device, so that a methanol aqueous solution of the mixing station exchanges heat with crude hydrogen of the reactor in the heat exchanger and then flows to the electric heating device and the purification device respectively. According to the hydrogen production device, the hydrogen production amount can be adjusted while hydrogen is produced in time, and resource waste caused by preparation of surplus hydrogen is avoided.

The application provides a methanol reforming hydrogen production device using high-temperature gas heat supply and a control strategy, which comprises a shell, a heat exchange channel and a reforming hydrogen production chamber, two cavities are arranged in the shell, a heat exchange channel is arranged in the lower cavity, the outlet of the heat exchange channel is communicated with the upper cavity through a fluid guiding unit, the inlet of the heat exchange channel is communicated with a tail gas conveying system and a methanol aqueous solution conveying system respectively, the upper cavity is divided into the reforming hydrogen production chamber and a collecting chamber through an annular partition plate, the reforming hydrogen production chamber is communicated with the collecting chamber, the collecting chamber is communicated with a hydrogen collecting system and is used for collecting hydrogen, and the reforming hydrogen production chamber is coated with a methanol reforming catalyst. The application has the characteristics of high hydrogen production rate and stable hydrogen production system control.

The present application relates to a kind of gel microspheres containing nanometer silicon, the gel microspheres include 1-10wt% sodium alginate, 0.01-20wt% nanometer silicon, 1-10wt% crosslinking agent.The gel microspheres of the present application can effectively slow down the hydrogen production rate of nanometer silicon while not too much loss of total hydrogen production, extend the hydrogen production time.In addition, the gel microspheres can effectively prevent nanometer silicon from diffusing in water body, prevent nanometer silicon from directly contacting biology and producing toxic effect, and safely repair aquatic ecosystem.

The application relates to preparation of a TpBD-TpTAPT composite material and application of the composite material in photocatalytic decomposition of water to produce hydrogen. The application aims to solve the problems of low light utilization rate and low hydrogen production efficiency of existing single COF materials, i.e. TpBD and TpTAPT photocatalytic water decomposition hydrogen production materials, and provides a novel preparation method of a TpBD-TpTAPT composite material. First, 4,4'-diaminobiphenyl and 1,3,5-triformylphloroglucinol, 2,4,6-tris(4-aminophenyl)-1,3,5-triazine and 1,3,5-triformylphloroglucinol are respectively dispersed into a mixed solution of 1.75ml of mesitylene and acetic acid (6:1) to prepare TpBD and TpTAPT COF precursors through solvent dispersion; and then the obtained two kinds of COF precursors are compounded through a solvothermal method under the condition of heating at 120 DEG C for 72h to obtain the TpBD-TpTAPT composite material. The preparation process is simple and effective, reagent consumption is low, and the yield is high; and the photocatalyst provided by the application can effectively improve the problem of low photocatalytic water decomposition hydrogen production efficiency. The application is applied to the field of photocatalytic decomposition of water to produce hydrogen, and experiments show that the composite material has excellent photocatalytic decomposition of water to produce hydrogen performance, and the water decomposition hydrogen production rate can reach 34.91mmol.h ‑1 ·g ‑1 under visible light irradiation.

This invention discloses a method for synthesizing Mn using a solvothermal method. 0.43 Cd 0.57 This invention relates to a method for producing S / Cu2MoS4 photocatalysts, belonging to the field of catalyst technology. First, copper molybdenum sulfide is prepared using cuprous oxide as a template. A solvothermal method is then used to synthesize copper molybdenum sulfide with high purity and good crystallinity. Next, manganese cadmium sulfide is prepared using manganese acetate, cadmium acetate, sodium hydroxide, and thioacetamide as raw materials. Before the hydrothermal reaction, copper molybdenum sulfide is added, and manganese cadmium sulfide is successfully modified by constructing a heterojunction, thus synthesizing Mn. 0.43 Cd 0.57 The S / Cu2MoS4 photocatalyst improved the photocatalytic hydrogen production rate of manganese cadmium sulfide. Furthermore, the Mn prepared in this invention... 0.43 Cd 0.57 The S / Cu2MoS4 photocatalyst can produce hydrogen at a rate of 8233 μmol / (g·h), which is 2.08 times that of pure manganese cadmium sulfide and 1.24 times that of manganese cadmium sulfide loaded with 1% platinum.

The invention provides a preparation method and application of a universal RuM / C (M = Fe, Co or Ni) nano-alloy catalyst. The preparation method of the Ru-based nano-alloy has universality, RuFe / C, RuCo / C and RuNi / C can be prepared according to the method, the preparation method is simple, batch production is easy to achieve, and the Ru-based nano-alloy serves as a formic acid hydrogen production catalyst, the hydrogen production rate is high, and the Ru-based nano-alloy has high catalytic activity and stability.

The invention discloses a method and system for increasing yield of hydrogen through coal underground gasification development, and relates to the technical field of coal underground gasification development. The method comprises the following steps that a water injection well, an oxidizing agent injection well and a production well are formed in an area with a coal layer; the underground coal layer is ignited through the oxidizing agent injection well, and a cavity is formed in the coal layer; injecting water vapor into the cavity through the water injection well; and monitoring the content of hydrogen produced by the production well, and when the daily hydrogen production has an obvious decreasing trend, controlling the end, located in the cavity, of the water injection well to move upwards and backwards, so that the end, located in the cavity, of the water injection well moves to the outer boundary area of the cavity. When the hydrogen production rate is detected to be reduced, the water injection retraction operation is performed, so that the water injection point is aligned with the boundary of the current underground coal layer, the gasification reaction with water is recovered, and the yield of H2 is increased.

The invention discloses an oil field sewage hydrogen production electrolytic cell electrode and a preparation method and application thereof, and belongs to the technical field of oil field sewage treatment and hydrogen energy production. The electrolytic bath electrode comprises an anode electrode and a cathode electrode; wherein the anode electrode comprises a base material and a coating, and the coating comprises the following components: 45 wt% of IrO2, 40 wt% of Ta2O5 and 15 wt% of Nb2O5; the cathode electrode comprises the following components: 70 wt% of Ni, 20 wt% of Co and 10 wt% of Ru; the preparation method specifically comprises the following steps: (1) dissolving IrCl3, TaCl5 and NbCl5 in an ethanol solution, adding ethylene glycol, stirring, depositing and carrying out laser sintering to obtain an anode electrode; and (2) uniformly mixing Ni powder, Co powder and Ru powder, adding polyvinylpyrrolidone, and carrying out mixing, pressing, laser sintering, soaking and cleaning to obtain the cathode electrode. Through an innovative electrode material formula and a preparation process combining chemical vapor deposition and laser sintering, the corrosion resistance, the hydrogen evolution efficiency and the hydrogen production rate of the electrolytic cell electrode are remarkably improved, and meanwhile production energy consumption and cost are reduced.

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.