15results about How to "Increase hydrogen production" patented technology

The invention discloses a multi-electrolytic cell collaborative optimization control method suitable for wide-range power fluctuation, and belongs to the technical field of new energy. According to the method, an optimization framework is adopted for collaborative optimization of hydrogen production power supply power, electrolytic cell power, electric energy storage power and electrolytic cell time sequence production state, a finite time domain rolling solving method is adopted in optimization, the rolling time domain length is hour level, the sampling time is minute level or hour level, an optimization objective function and a constraint model are established respectively, and the optimization objective function and the constraint model are optimized. And solving the optimization model by adopting a mathematical programming or heuristic algorithm to obtain the operation power of each device of the multi-electrolytic cell hydrogen production system and the electrolytic cell state. According to the method, under the wide-range power fluctuation working condition, battery energy storage weakening of frequent starting and stopping of the electrolytic cell is achieved, under the narrow-range power fluctuation working condition, battery energy storage is achieved, it is guaranteed that the electrolytic hydrogen production system operates at the optimal efficiency, and maximum energy utilization and efficient operation of the system are guaranteed; and a new method is provided for collaborative optimization control of the multi-electrolytic-bath hydrogen production system.

The invention discloses a structure for improving hydrogen production by alkaline electrolysis of water. The section of an electrode plate is of an oval structure, electric heating wires are evenly distributed in the electrode plate in the full-length direction of the electrode plate, and propeller blades for driving electrolyte to be in a turbulent flow state are further arranged on the inner bottom face, located at the bottom of the electrode plate, of an electrolytic bath. The electrode plate of the elliptical structure is adopted, the contact area between the electrode and the catalyst on the surface of the electrode and alkaline water is increased, the area is increased, full contact with liquid is facilitated, and bubble separation is facilitated. The thin electric heating wire is arranged in the electrode, so that the effect of forming relative high temperature on the catalyst layer on the surface of the electrode to promote the electrolytic efficiency is realized, and alkali liquor and bubbles generated on the surface of the electrode are quickly discharged. The propeller blade structure promotes alkali liquor to form a turbulent flow state, heat exchange is improved, alkali liquor flowing is promoted, generated bubbles are promoted to be rapidly separated, the contact time of an electrode and liquid is prolonged, the hydrogen production efficiency and yield are overall improved, and energy consumption is reduced.

The invention relates to the technical field of hydrogen production, in particular to equipment for preparing hydrogen from biomass, a method for preparing hydrogen from biomass and application. The equipment comprises a biomass pretreatment system and a chemical-looping hydrogen production system, wherein the biomass pretreatment system comprises a drying unit, a crushing unit and a granulating unit; the chemical-looping hydrogen production system comprises a biomass hydrogen production reduction reactor, a hydrogen purification device and a dust remover; the dust remover is connected with a regeneration storage tank and an air oxidation reactor; the air oxidation reactor is connected with the biomass hydrogen production reduction reactor; the granulating unit is connected with the biomass hydrogen production reduction reactor; a first heat exchanger is arranged between a synthesis gas outlet of the biomass hydrogen production reduction reactor and the hydrogen purification device, and a water vapor outlet of the first heat exchanger is connected with the biomass hydrogen production reduction reactor; and an oxygen-poor waste gas outlet of the air oxidation reactor is connected with the drying unit. The equipment is simple in structure, waste heat is fully utilized, energy consumption is reduced, hydrogen purity and yield are improved, and carbon dioxide is captured.

The invention discloses an ammonia fuel combustion system and a control method thereof, and relates to the technical field of fuel combustion. The system comprises an ammonia engine, a reforming hydrogen production device, a preheating box, an ammonia storage device, a premixer and a turbocharger, wherein the reforming hydrogen production device comprises a reaction inner cavity and a heating outer cavity. The premixer mixes gases from the ammonia reservoir, the turbocharger, and the reaction chamber of the reforming hydrogen production unit. The reaction inner cavity of the reforming hydrogen production device is used for carrying out decomposition reaction on ammonia-containing gas from the ammonia storage device and the turbocharger to obtain hydrogen-containing gas, and providing the hydrogen-containing gas to the premixer. A waste gas outlet of the ammonia engine is connected to a heating outer cavity of the reforming hydrogen production device, and the heating outer cavity provides reaction heat for the reaction inner cavity. The heating outer cavity is connected to the preheating box, and the preheating box preheats ammonia-containing gas input into the reaction inner cavity through ammonia engine waste gas from the heating outer cavity. The hydrogen production efficiency can be improved, so that the operation performance of the engine is improved.

The invention discloses a preparation method of a three-dimensional flower-cluster-shaped CdS QDs (at) ZnS / ZnO composite photocatalyst, belongs to the field of preparation of photocatalytic materials, and aims to solve the problem of relatively low photocatalytic efficiency. The preparation method comprises the following steps: 1, preparing zinc oxide: dissolving Zn (CH3COO) 2.2 H2O in deionized water, stirring until Zn (CH3COO) 2.2 H2O is completely dissolved, adding NaOH, stirring to form an emulsion, transferring the mixed emulsion into a polytetrafluoroethylene reaction kettle, and treating at 160 DEG C for 10 hours; 2, preparation of cadmium sulfide quantum dots (CdS QDs): dropwise adding thioacetamide (TAA) into a Cd (NO3) 2.4 H2O aqueous solution, continuously stirring and dropwise adding a NaOH solution, adjusting the pH value of the solution to 10.5, then adding a Na2S solution, stirring at 65 DEG C for 1 h, cooling to room temperature, and aging for 24 h; and 3, dissolving Zn (CH3COO) 2.2 H2O and TAA in deionized water, adding ZnO powder, adding CdS QDs, and carrying out rapid stirring. Putting into a microwave reaction instrument, reacting at 160 DEG C for 45 minutes, washing and drying. The three-dimensional flower-cluster-shaped CdS QDs (at) ZnS / ZnO composite photocatalyst is prepared through a microwave-assisted hydrothermal method, and the photocatalytic oxidation performance is effectively improved.

The invention discloses a wind-solar complementary hydrogen production system and method based on alkaline electrolytic water hydrogen production. The system comprises a photovoltaic power generation unit, a wind power generation unit, a storage battery energy storage unit, an electrolytic hydrogen production unit, a load and a power electronic converter. The photovoltaic power generation unit is electrically connected with the alternating current bus through an AC / DC converter, the wind power generation unit is electrically connected with the alternating current bus through an AC / AC converter, and the alternating current bus is connected with a superior power distribution network through a transformer; the storage battery energy storage unit is electrically connected with the alternating current bus through the AC / DC converter, the load is electrically connected with the alternating current bus through the AC / AC converter, and the electrolytic hydrogen production unit comprises an electrolytic bath, a compressor and a hydrogen storage tank; the problem that a single AEL technology or a PEMEL technology cannot give consideration to response speed and cost is solved, composite hydrogen production is achieved based on the constructed wind-solar complementary hydrogen production system, flexible absorption of wind-solar resources is achieved, and the hydrogen production cost of the system is reduced on the basis of improving the hydrogen production amount of the system.

The invention discloses an electrolytic cell and an electrolytic cell active area height design method. The electrolytic cell comprises a first end plate; the first end plate and the second end plate are horizontally arranged; the electrolytic cell core is arranged between the first end plate and the second end plate, and the electrolytic cell core comprises a cathode side polar plate, a membrane electrode and an anode side polar plate which are arranged in the horizontal direction. The invention discloses a method for designing the height of an active region of an electrolysis cell. The method comprises the following steps: according to an oxygen production volume equation # imgabs0 # of the electrolysis cell and a relational expression V (t) < pi * a * R2 + d * N according to the minimum volume of the cell filled with bubbles and the oxygen production of a cross section, wherein the relational expression is as follows: V (t) < pi * a * R2 + d * N; according to the method, bubbles can be effectively discharged, the mass transfer resistance is reduced, the energy consumption is greatly reduced, and the relation between the height of the active region and different current densities and the height of the header pipe is given, so that the height of the active region of the small chamber is quantitatively designed.

A device and method for producing hydrogen by biomass gasification, relating to the technical field of producing hydrogen by biomass gasification, comprises a gasifier, a primary cyclone separator, a cracking furnace, a heat recovery device, a secondary cyclone separator, a filter, a water washing unit, a desulfurization unit, a conversion unit, a pressure swing adsorption unit, a return device, a steam drum, an ash hopper I and a fly ash cooler; a distribution plate is arranged in the gasifier, and a biomass feed port is arranged above the distribution plate; a slag discharge ring pipe is connected at the central notch of the cone bottom of the distribution plate of the gasifier, and a gasifying agent nozzle is arranged in the slag discharge ring pipe; a gasifying agent inlet is arranged in the gas chamber area of ​​the gasifier; a dense phase section and a dilute phase section are arranged from bottom to top above the distribution plate of the gasifier; the top outlet of the gasifier is connected with the inlet of the primary cyclone separator, and the scheme greatly increases the primary conversion efficiency of the fly ash, and correspondingly reduces the invalid fly ash circulation amount between the gasifier and the primary cyclone separator.

The present invention relates to the technical field of hydrogen production by electrolysis of water, and discloses a control method for a large-scale hydrogen production cluster by electrolysis of water for wind-solar coupling, including: predicting the total output power of a photovoltaic power generation system and a wind power generation system; if the actual hydrogen production of an electrolyzer cannot reach the expected hydrogen production within a set time, refitting the parameters through the production data of the electrolyzer, and obtaining multiple electrolyzer power allocation sets through a constrained optimization model; clustering the production data of the electrolyzer to obtain multiple state categories; selecting the best electrolyzer power allocation set through a clustering transfer model, and distributing it to each electrolyzer as the power of each electrolyzer at the next moment. When the present invention distributes power, it fully considers the characteristics of each electrolyzer, dynamically corrects the power online, makes full use of energy, and produces synergistically between electrolyzers, so that the hydrogen production can be maximized under the premise of ensuring the operating rate.

The invention discloses an in-situ generated magnesium borohydride composite hydrogen storage material as well as a preparation method and application thereof, and belongs to the technical field of solid hydrogen storage. According to the preparation method, an intercalation-in-situ growth method is adopted to prepare the in-situ generated magnesium borohydride composite hydrogen storage material, and the preparation method comprises the following steps: S1, adding a certain amount of a carrier into a (CH3) 2S. BH3 toluene solution in a glove box filled with Ar, and uniformly stirring the mixture to obtain a turbid liquid A; s2, weighing the turbid liquid A and a Mg (C4H9) 2 heptane solution with a certain concentration, stirring until complete reaction to obtain a precipitate B, washing with an anhydrous toluene solution, and collecting the precipitate B; and S3, transferring the precipitate B to a vacuum drying oven, and carrying out thermal decomposition under a vacuum condition to obtain the in-situ generated magnesium borohydride composite hydrogen storage material. The hydrogen storage material provided by the invention not only shows excellent hydrogen production capacity in hydrolysis hydrogen production reaction, but also has controllable reaction rate.

The invention discloses a hydrogen production method for treating etching solution wastewater by using a photo-assisted single-chamber microbial electrolytic cell, and relates to the technical field of microbial electrochemistry and photocatalysis, and the hydrogen production method comprises the following steps: S1, mixing an anolyte of a stably operated double-chamber microbial fuel cell with etching solution tail end wastewater, adding the mixture into a reactor, and regularly replacing the solution until the anode potential is stable; s2, domesticating two ends of the electrode by using a direct-current power supply and external voltage until the potential of the cathode is reduced, and completing the domestication of the anode; and S3, the photocathode adopts a photocatalytic material, and organic matters are mineralized and nickel ions are removed while hydrogen is produced under an external voltage condition. The photo-assisted microbial electrolytic tank integrates the advantages of water electrolysis hydrogen production, photocatalytic hydrogen production and microbial electrolytic tank hydrogen production, overcomes the defect that a photocatalyst for photocatalytic hydrogen production is unstable, reduces the energy consumption required by microbial electrolytic tank hydrogen production, and recovers heavy metal mineralized refractory organics in etching liquid tail end wastewater. The method is a clean, efficient and low-consumption mode for treating wastewater and simultaneously producing hydrogen.

A method for catalytically producing hydrogen from hydrocarbon raw materials and enriching CO2, wherein petroleum hydrocarbons are fed into a fluidized reactor, contacted with a catalyst containing a metal oxide to undergo a carbon-hydrogen bond decomposition reaction to generate hydrogen, and the reaction oil gas and the carbon-bearing catalyst obtained by the reaction are separated; the reaction oil gas is further separated into products containing hydrogen, CO, CO2, methane and other hydrocarbons; the carbon-bearing catalyst is first fed to a gasifier, contacted with water vapor for a high-temperature gasification reaction to generate hydrogen and carbon dioxide; the deactivated catalyst with a small amount of coke after gasification is fed to a regenerator to contact with water vapor and an oxygen-containing gas for a high-temperature gasification and carbonization reaction to be regenerated, the regenerated catalyst with the carbon burned off is returned to the fluidized reactor for recycling, and the regenerated flue gas is separated to obtain products containing hydrogen, CO and CO2. The present invention converts low-value hydrocarbon raw materials into hydrogen, realizes the high-value utilization of petroleum resources, and simultaneously realizes CO2 enrichment in the gasification and regeneration process, which is beneficial to carbon recovery and capture.

This invention relates to the field of hydrogen energy production, specifically to a composite material for improving the performance of magnesium-based hydrolysis hydrogen production, comprising a Mg-Ca alloy and Mg2M, wherein the mass percentage of Mg2M is 8%-15%; and the mass percentage of Ca in the Mg-Ca alloy is 8%-12%. The preparation method includes: Mg-Ca alloy preparation: magnesium and calcium materials are melted in an inert gas atmosphere at a melting temperature of 740-760℃, and then cooled to room temperature to obtain the Mg-Ca alloy; Mg2M preparation: magnesium and Mg2M materials are melted in an inert gas atmosphere at a melting temperature of 740-760℃, and then cooled to room temperature to obtain the Mg2M material; Ball milling: the Mg-Ca alloy and Mg2M are mechanically crushed and then pre-ball milled, followed by fine ball milling. By implementing this method, the conversion time for hydrogen production from magnesium-based materials can be improved.

The utility model discloses a novel internal pressure type hydrogen purification device which comprises a shell, wherein one end of the shell is fixedly connected with a hydrogen discharge component; the other end of the shell is in sealed threaded connection with a spacer ring, a waste gas pipe fixedly penetrates through one side of the outer surface of the spacer ring, and a capillary tube is fixedly assembled in the waste gas pipe; and a palladium membrane tube connecting seat is connected between the spacer ring and the shell in a sealing and pressing manner. According to the utility model, through the arrangement of the hydrogen discharge assembly, the gas inlet assembly, the waste gas pipe, the capillary pipe, the spacer ring, the palladium membrane pipe connecting seat, the palladium membrane pipe assembly and the palladium membrane pipe supporting assembly, an integrated internal pressure type design is adopted as a whole, mixed gas is pressed in from the palladium membrane pipe, the mixed gas is purified through the palladium membrane pipe, and waste gas and hydrogen are respectively pressed out; the device has the characteristic of integration of separation and purification, so that the reaction efficiency is high, the hydrogen production amount is large, and meanwhile, the pressing and fixing assembly and the connecting assembly are arranged in a matched manner, so that the palladium membrane tube assembly is favorably replaced.

The invention discloses a Bi2S3-In2S3 semiconductor heterojunction photo-thermal catalyst as well as a preparation method and application of the Bi2S3-In2S3 semiconductor heterojunction photo-thermal catalyst. According to the technical scheme, the Bi2S3-In2S3 semiconductor heterojunction photo-thermal catalyst with wide spectral response is prepared by adopting a method for carrying out in-situ high-temperature vulcanization on Bi-doped amino In-MOF (Metal-Organic Framework); according to the catalyst, photocatalysis and thermocatalysis are combined, the photo-thermal synergistic effect is achieved, the synergistic effect promotes the catalyst to show excellent photocatalytic activity under visible light irradiation, meanwhile, desorption of products on the surface of the catalyst can be accelerated under the heating condition, effective utilization of photo-induced electrons and holes is promoted, and the photocatalytic activity of the catalyst is improved. The hydrogen production amount under the photo-thermal concerted catalysis condition is obviously increased, and a certain hydrogen production amount can also be achieved at low temperature.