86results about How to "Improve hydrogen production efficiency" patented technology

The utility model discloses a system for producing hydrogen by electrolyzing water. The system comprises an alkali liquor electrolysis device, a gas-liquid separation device and an interlocking control device, the alkali liquor electrolysis device comprises an electrolytic bath and an alkali liquor circulating pump, the gas-liquid separation device comprises a gas-liquid separator, and the interlocking control device comprises an electromagnetic valve; the gas-liquid separation device further comprises a U-shaped pipe for separating gas and liquid by utilizing gravity and a jacketed pipe for separating gas and liquid by utilizing condensation; the U-shaped pipe is arranged between the electrolytic bath and the gas-liquid separator, and the alkali liquor self-flowing pipe is arranged between the low point of the U-shaped pipe and the alkali liquor circulating pump; the jacketed pipe is arranged between the U-shaped pipe and the gas-liquid separator, and an interlayer of the jacketed pipe is communicated with a chilled water pipeline. According to the water electrolysis hydrogen production system, the U-shaped pipe and the jacketed pipe are arranged, so that the gas-liquid separation efficiency of the water electrolysis hydrogen production system is improved, and the hydrogen production efficiency is improved; a washer and a cooler are removed, the whole equipment is simple, the occupied space is small, and the manufacturing cost is low; through regulation and control of the interlocking control device, the safety of the water electrolysis hydrogen production system is improved, and unattended operation can be achieved.

A method for improving the release efficiency of bubbles on the surface of an electrode in high-current water electrolysis hydrogen production belongs to the technical field of hydrogen energy production, and the specific scheme comprises the following steps: step 1, applying pulse voltage to a proton exchange membrane electrolytic cell for water electrolysis hydrogen production, the applied pulse current being 0.5-2A, and the applied pulse voltage being 1.4-1.6 V; and 2, conveying the electrolyte deionized water to an anode chamber of the proton exchange membrane electrolytic cell so as to initiate an oxidation reaction to prepare hydrogen. According to the pulse dynamic electrolysis technology, the PEMWE high-current hydrogen production performance can be improved by adjusting the power supply mode of the power source. Besides, the voltage during the pulse interval period is zero, and the total energy consumption actually only comprises the electric energy consumption within the pulse voltage applying time, so that the pulse dynamic electrolysis technology has more advantages from the energy consumption perspective. The pulse dynamic electrolysis technology is expected to promote bubble release and relieve the polarization phenomenon in PEMWE high-current hydrogen production, and the hydrogen production efficiency and the energy utilization rate of the system are improved.

The invention discloses a water electrolysis hydrogen production system which comprises an electrolysis hydrogen production unit, a water supplementing amount control unit and a temperature control unit, the water supplementing amount control unit comprises a water return device, an oxygen-water separator, a detection assembly and a control valve assembly, and a water supply main pipe and an oxygen outlet pipe of an electrolysis bath are connected with the oxygen-water separator; the control valve assembly controls connection and disconnection of the water return device and the oxygen-water separator, connection and disconnection of a water inlet pipe of the water return device and starting and stopping of the electrolytic pump, the temperature control unit comprises a cooling circulation system and a heat source device arranged in the oxygen-water separator, a hot side circulation pipeline of the cooling circulation system is connected with the oxygen separator, and a cooling pump is arranged on an inlet pipeline. The cold side circulation pipeline is provided with a temperature adjusting valve, and the detection assembly controls starting and stopping of the heat source device, starting and stopping of the cooling pump, on-off of the temperature adjusting valve and starting and stopping of the electrolytic pump. According to the water electrolysis hydrogen production system, the water quantity required by the system and the initial starting temperature of the electrolytic bath can be guaranteed, the power consumption waiting for temperature rise is saved, and the whole-stage whole machine hydrogen production efficiency is improved.

The invention relates to an AEM electrolytic bath. The current density and the heat exchange capacity of the electrolytic bath are improved. Liquid on the anode side of each single section of the electrolytic cell can uniformly and quickly flow on the surface of the anion exchange membrane, oxygen generated on the anode side can be quickly and effectively discharged out of the electrolytic cell, and hydrogen generated on the cathode side and water permeated from the anion exchange membrane can be timely and efficiently discharged out of the electrolytic cell; certain pressure is provided for the cathode catalyst layer and the anode catalyst layer, so that the catalyst layers are uniformly stressed and attached to the two sides of the anion exchange membrane. In a comparison test of electrolysis with an active area of 300cm < 2 >, under the same conditions of 2V voltage and temperature of 60 DEG C, the current value of the electrolytic bath of a cutting machining flow field on a metal pole plate is 218A, the current value of the electrolytic bath of a spongy foam metal flow field with a groove-shaped flow channel is 289A, and the efficiency is improved by 32.56%. And under other working conditions, the test current is also improved by 20%-32%.

The embodiment of the utility model provides an alkaline water electrolysis hydrogen production multi-working-condition testing device, the alkaline water electrolysis hydrogen production multi-working-condition testing device comprises an alkali liquor box, an electrolytic bath, a monitoring assembly and a control assembly, the alkali liquor box is used for storing alkali liquor; the electrolytic bath is communicated with the alkali liquor box and is used for electrolyzing to generate hydrogen; the monitoring assembly comprises a flow meter arranged at the outlet end of the alkali liquor box and a voltage monitor arranged on the electrolytic bath; the control assembly comprises a controller, a variable frequency pump and a regulating valve, the controller is connected with the flow meter and the voltage monitor to obtain the reading of the flow meter and the reading of the voltage monitor, and the variable frequency pump and the regulating valve are electrically connected with the controller; the variable-frequency pump is connected with the alkali liquor tank; the regulating valve is arranged between the alkali liquor tank and the electrolytic bath. The multi-working-condition testing device for hydrogen production by alkaline electrolyzed water provided by the embodiment of the utility model aims at testing electrolysis parameters of alkaline electrolyzed water under various working conditions so as to obtain better working condition parameters, and the reliability and efficiency of hydrogen production by alkaline electrolyzed water are improved.

The invention discloses a semi-coke tail gas chemical looping hydrogen production system which is characterized in that a first gas inlet chamber and a second gas inlet chamber are arranged in the hydrogen production system, and a reaction tube comprises a first reaction chamber and a second reaction chamber; the gas inlet of the first reaction chamber is communicated with the gas inlet of the second reaction chamber; the air outlet of the first reaction chamber is communicated with the air outlet of the second reaction chamber, so that the first reaction chamber and the second reaction chamber can supply air independently, the air speed in the first air inlet chamber is higher than that in the second reaction chamber, internal airflow circulation is effectively formed in the internal circulating fluidized bed, the reaction process is more sufficient, and the reaction efficiency is improved. The device effectively improves the hydrogen production efficiency, is simple in structure, realizes the independent air supply process through the independent design of the two cavities of the gas inlet pipe and the reaction pipe, realizes the effective circular reaction of tail gas in the reaction pipe through the control of the air speed, and improves the conversion efficiency.

The utility model relates to a nickel net which is characterized in that the nickel net is a multi-strand stranded wire nickel net and comprises transverse stranded wires and longitudinal stranded wires, the transverse stranded wires and the longitudinal stranded wires are woven in a transverse and longitudinal staggered mode to form the nickel net, the transverse stranded wires are formed by stranding a plurality of strands of first nickel monofilaments, and the longitudinal stranded wires are formed by stranding a plurality of strands of second nickel monofilaments. Compared with a traditional nickel net weaving mode, the nickel net and the production process thereof have the advantages that the multi-strand stranded wire nickel net has higher surface area and surface roughness, and has better surface adhesion effect and fewer surface adhesion defects after spraying treatment, so that the catalytic activity of the surface of an electrode is improved, the hydrogen evolution overpotential is reduced, and the service life of the electrode is prolonged. The water electrolysis hydrogen production efficiency is improved.

The invention provides a novel high-power low-ripple-output hydrogen production converter and a control method. The novel high-power low-ripple-output hydrogen production converter comprises a six-pulse conversion unit, a filter circuit and a three-phase stacked interleaved Buck circuit. The six-pulse commutation unit is connected in series with the filter circuit, then is connected in series with the three-phase stacked interleaved parallel Buck circuit 3, and finally is connected with a load. And the direct-current voltage of the converter is changed by controlling the phase of the trigger pulse of the thyristor valve so as to realize six-pulse direct-current power transmission. The main branch of the three-phase stacked interleaved parallel auxiliary branch is used for realizing power transmission, and the auxiliary branch is used for eliminating output current ripples. A voltage-current double closed-loop control strategy can ensure that each phase of the main branch realizes a good current sharing effect; alternating current component complementation and ripple complementation of the current IAX and the current IdcMain can be achieved by controlling the auxiliary branch switching tubes SAX1 and SAX2, then zero ripple of the output current Idco of the converter is achieved, and control over the auxiliary branch is completed. According to the invention, high-power low-current ripple output can be realized in a low-voltage high-current scene.

The invention discloses a water electrolysis hydrogen production device which comprises a first pole plate, a second pole plate, a pressing mechanism and a plurality of electrolytic bath units, the polarity of the first pole plate is opposite to that of the second pole plate, and the pressing mechanism comprises a first end plate, a second end plate, a connecting piece, an abutting plate and a plurality of driving pieces. The first end plate and the second end plate are arranged at intervals in the first direction and connected through a connecting piece, the first polar plate is arranged on the side, facing the second end plate, of the first end plate, the second polar plate is arranged on the side, facing the first end plate, of the second end plate, and a plurality of electrolytic cell units are arranged between the first polar plate and the second polar plate. An abutting plate is arranged between the first polar plate and the first end plate and / or between the second polar plate and the second end plate, a plurality of driving parts are arranged between the abutting plate and the end plates, and each driving part can independently push to enable the abutting plate to abut against the electrolytic cell unit, so that the abutting plate and the electrolytic cell unit can abut against each other and be attached to each other; the contact resistance between the abutting plate and the electrolytic cell unit is reduced, and the water electrolysis hydrogen production efficiency is improved.

The invention relates to an alkaline electrolytic cell multi-cell series-parallel hydrogen production optimization method, and the method comprises the steps: predicting photovoltaic power generation data in a certain time through an LSTM-CNN recurrent neural network, and enabling the interval of prediction time points to be 15 minutes; the predicted photovoltaic power generation power data are combined with a particle swarm optimization (PSO) algorithm to optimize the state of the electrolytic cell in the multi-cell series-parallel connection of the alkaline electrolytic cell, and the interval of optimization time points is 1 hour; each alkaline electrolytic cell is set to be in the optimal state at each time point for hydrogen production, the number of times of startup and shutdown of the alkaline electrolytic cell is reduced as much as possible, the hydrogen production efficiency of the alkaline electrolytic cell is improved to the maximum extent, meanwhile, the service life of the alkaline electrolytic cell is prolonged, the operation cost is reduced, and the safety problem of gas cross permeation is effectively avoided; and the stability and the safety of the system are improved.

The utility model belongs to the technical field of electrolytic baths, and particularly relates to a pure water hydrogen production PEM electrolytic bath structure which comprises an anode plate and a cathode plate, the anode plate is provided with an oxygen outlet and a water inlet, the water inlet is fixedly provided with a first connecting shell and a second connecting shell, the first connecting shell is symmetrically provided with connecting assemblies, and the second connecting shell is fixedly provided with a second connecting shell. A filter screen is arranged on the frame and located on one side of the water inlet. According to the utility model, pure water can be conveniently filtered by the filter screen, tiny impurities in the pure water can be intercepted by the filter screen, water flow containing the impurities is prevented from entering the electrolytic bath, when the filter screen is regularly cleaned, the first connecting shell is detached from the second connecting shell by operating the connecting assembly, and then the frame is pulled to move out of the second connecting shell, so that the filter screen is cleaned; the filter screen is arranged on the filter screen to clean impurities on the filter screen, blockage of the filter screen caused by impurity accumulation is avoided, adverse effects of mechanical impurities possibly contained in pure water on the electrolysis process are avoided by filtering the pure water, and the purity of hydrogen produced by the electrolytic bath is improved.

The invention discloses a preparation method of an efficient and stable TiNi alloy-based porous composite structure electro-catalysis electrode, and relates to a preparation method of an electro-catalysis electrode. The invention aims to solve the problem that the existing hydrogen evolution electro-catalysis electrode cannot simultaneously have high hydrogen production efficiency, low cost and excellent stable performance. The preparation method comprises the following steps: 1, pretreating the sodium metaaluminate pore-forming agent; 2, ball-milling and mixing; (3) preparing a porous TiNi-based alloy; and 4, compounding a catalytic active layer. The method is used for preparing the efficient and stable TiNi alloy-based porous composite structure electro-catalysis electrode.

The invention discloses a method for improving alkaline water electrolysis hydrogen production efficiency by using electrolyte concentration difference, and belongs to the technical field of water electrolysis hydrogen production. The method comprises the following steps: adding KOH electrolyte with the concentration of 30wt% into the cathode region on one side of the diaphragm, and adding KOH electrolyte with the concentration of 35wt% into the anode region on the other side of the diaphragm; and electrifying the electrolytic bath, controlling the temperature to be 80-90 DEG C, and carrying out electrolytic reaction on the water under the action of the electric field. The hydrogen production efficiency of alkaline electrolyzed water is improved by utilizing the electrolyte concentration difference, the hydrogen production efficiency and the hydrogen purity can be improved, the energy consumption and the equipment cost can be reduced, the reliability and the durability of the system are improved, meanwhile, the environmental influence is reduced, and a positive role is played in promoting the production and the application of green hydrogen.

The utility model discloses an electrolytic tank for producing hydrogen by electrolyzing water. The electrolytic tank comprises an anode end electrolytic unit tank, a cathode end electrolytic unit tank and a plurality of intermediate electrolytic unit tanks positioned between the anode end electrolytic unit tank and the cathode end electrolytic unit tank, each electrolysis unit tank is formed by folding an anode chamber and a cathode chamber, and an anode side sealing gasket, a diaphragm and a cathode side sealing gasket are sequentially arranged between the folding surfaces of the anode chamber and the cathode chamber; an independent anode chamber liquid inlet and an independent anode chamber liquid outlet are respectively formed in the anode chamber of the electrolysis unit tank, and an independent cathode chamber liquid inlet and an independent cathode chamber liquid outlet are respectively formed in the cathode chamber of the electrolysis unit tank; an anode binding post is arranged on the anode chamber, and a cathode binding post is arranged on the cathode chamber. The device can be installed, disassembled and maintained on site at a use end, and the transportation cost, the maintenance cost and the like caused by installation and maintenance at a production end are reduced; the electrolytic hydrogen production mode can be flexibly switched according to different conditions, so that the advantages of electrolytic alkaline water hydrogen production and PEM hydrogen production are complementary.

The invention is suitable for the technical field of spinning, and provides a special-shaped polyphenylene sulfide short fiber blended yarn for a hydrogen production diaphragm, the British system count of the blended yarn is 5-20S, and the blended yarn is made of polyphenylene sulfide short fibers with different special-shaped sections. The invention further provides a spinning method of the special-shaped polyphenylene sulfide short fiber blended yarn for the hydrogen production diaphragm. The spinning method comprises the steps of curing, blowing, carding, drawing, roving, spinning and spooling. The polyphenylene sulfide short fibers with different section shapes are subjected to mixed spinning, the specific surface area of the fibers is increased through the special-shaped fibers, the porosity is increased from the yarn end due to the fact that the shapes of the special-shaped section fibers are different, more small pores exist between the fibers in the yarn, meanwhile, the yarn body is more fluffy due to the low twist, the porosity is further increased, and therefore the specific surface area of the fibers is increased. The prepared yarn has the characteristics of good evenness, less hairiness, low twist and fluffiness, higher yield and the like, and the diaphragm prepared from the yarn has high efficiency of hydrogen production by alkaline water electrolysis.

The invention relates to an aluminum circulation method for metal aluminum energy storage and hydrogen production, and belongs to the technical field of aluminum material production. The method comprises the steps that aluminum oxide is fed into an electrolytic aluminum factory for electrolysis, and metal aluminum liquid is obtained; the metal aluminum liquid is processed, and the aluminum-based hydrogen production material with the large specific surface area is obtained; the method comprises the following steps: carrying out chemical reaction on an aluminum-based hydrogen production material and water under the action of a nitrogen-containing strong alkaline organic matter catalyst to obtain hydrogen and alumina hydrate slurry; performing solid-liquid separation on the alumina hydrate slurry to obtain alumina hydrate and an aqueous solution containing the catalyst; roasting the alumina hydrate to obtain high-activity metallurgical-grade alumina; the high-activity metallurgical-grade aluminum oxide is cyclically used for preparing metal aluminum liquid through electrolysis, and the aqueous solution containing the catalyst is cyclically used for hydrogen production through reaction of the aluminum-based hydrogen production material and water, so that a closed-loop cycle is formed. The defects of high energy consumption, high carbon emission intensity, high cost and the like in the metal aluminum preparation and aluminum recycling process are overcome.

The application discloses a water electrolysis system configuration optimization method and platform based on multi-source data collaborative calculation, comprising the following steps: collecting multi-dimensional operation parameters of electrolytic cells, gas-liquid separators and other equipment through a cross-domain data collaborative processing system and transmitting in real time, calling a water electrolysis multi-field coupling simulation model to dynamically simulate an operation state, combining a guided matrix incremental updating algorithm to iteratively adjust configuration parameters, calculating equipment matching through a load adaptation model to determine a configuration feasible region, establishing a mapping relationship between parameters and the operation state through multi-source data cross verification, performing multi-round screening on schemes in the feasible region and dynamically adjusting equipment grouping, connection modes and linkage logic, and finally determining an optimized configuration scheme adapting to different scenes; the platform realizes a closed loop of data acquisition, simulation operation, parameter updating, scheme optimization and execution landing through orderly linkage of six functional units, and guarantees efficient and stable operation of the device under complex working conditions.

The polar plate comprises a plate body with a flow field area, the flow field area is provided with a plurality of convex ribs which extend in the length direction of the polar plate and are distributed at intervals in the width direction of the polar plate, and a flow channel is formed between every two adjacent convex ribs. The runner comprises a first region and a second region which are communicated along the thickness direction of the polar plate, the first region is positioned on one side, close to the membrane electrode assembly, of the second region, and the sectional area of the first region is smaller than that of the second region. When the flow rate of the electrolyte is certain, the pressure intensity in the first area is greater than the pressure intensity in the second area, so that a flow pressure difference can be formed between the first area and the second area in the same flow channel, and gas positioned at the membrane electrode can flow towards the plate body along the membrane electrode assembly under the action of the flow pressure difference; and gas generated after electrolysis is prevented from being accumulated at the membrane electrode, so that the possibility of a gas aggregation effect at the membrane electrode is reduced, and the hydrogen production efficiency of the electrolytic cell is improved.

The application provides an electrolysis chamber of a proton exchange membrane electrolyzer and the proton exchange membrane electrolyzer. The electrolysis chamber of the proton exchange membrane electrolyzer comprises: bipolar plates, sealing rubber lines, anode diffusion layers, proton exchange membrane assemblies, cathode diffusion layers, sealing rubber lines and bipolar plates which are sequentially stacked; the side of the bipolar plate facing the proton exchange membrane assembly is provided with a groove; the side of the sealing rubber line facing the bottom of the groove is provided with a first inclined surface; the bottom of the groove is provided with a booster part; the side of the booster part facing the sealing rubber line is provided with a second inclined surface; and the second inclined surface is in close contact with the first inclined surface. The friction between the sealing rubber line and the bipolar plate in the electrolysis chamber of the proton exchange membrane electrolyzer is large, so that the pressure resistance grade of the electrolyzer is improved, the sealing effect of the sealing rubber line in different environments is ensured, the electrolyzer can withstand a pressure of up to 7MPa, and the hydrogen production efficiency and safety are improved.

The invention relates to the technical field of coal-fired thermal power generation and supercritical water gasification hydrogen production, in particular to a supercritical thermal power generating unit cooperative power generation and hydrogen production system. The system comprises a steam conveying system, a reaction device, a material conveying system, a product waste heat utilization system and a product separation system, the steam conveying system is connected with a steam inlet of the reaction device; the product waste heat utilization system comprises a material preheating device, a first heat exchange unit and a second heat exchange unit; the material preheating device is connected with the material conveying system and the first heat exchange unit; the first heat exchange unit is connected with the reaction device; a discharge hole of the reaction device is respectively connected with the material preheating device and the first heat exchange unit; the first heat exchange unit is connected with the second heat exchange unit, and the second heat exchange unit is connected with the product separation system. According to the invention, the residual steam is used for efficiently producing hydrogen from the coal slime wastewater while the safe load operation of the boiler is ensured, so that the hydrogen production efficiency is improved.

This invention discloses a middle plate, an electrode chamber assembly, and an electrolytic hydrogen production device. The middle plate includes a body and a circulation plate. The body is integrally stamped from a metal plate. An S-shaped annular sealing channel is stamped around the perimeter of the body surface. Several first protrusions and second protrusions are stamped on two surfaces of the body inside the annular sealing channel. The circulation plate is inclined and fixedly connected to the first protrusions. The circulation plate is disposed within the annular sealing channel, and the distance between its top edge and the body surface is less than the distance between its bottom edge and the body surface. The electrode chamber assembly is assembled using the aforementioned middle plate, and the electrolytic hydrogen production device utilizes the aforementioned electrode chamber assembly. This invention provides excellent sealing performance. The stamped structure integrating the anode and cathode chambers and the middle plate effectively reduces leakage points and lowers the risk of external leakage. Furthermore, it reduces spot welding processes, lowers internal contact resistance, and thus reduces the energy consumption of the electrolyzer. The above structure is rationally configured and easy to install.

The present disclosure provides a method and device for controlling a hydrogenation and hydrogen production integrated station, which belongs to the field of energy production technology. The method includes: adjusting the feed ratio of each raw material of the hydrogen production equipment based on the reactant concentration of the hydrogen production equipment in the hydrogenation and hydrogen production integrated station; the reactant concentration is the mixed concentration of each raw material in the hydrogen production equipment, and the feed ratio is the feed ratio of each raw material in the hydrogen production equipment; determining the hydrogen production efficiency of the hydrogen production equipment based on the operating parameters of the hydrogen production equipment; determining the feed rate of each raw material of the hydrogen production equipment based on the hydrogen production efficiency of the hydrogen production equipment and the feed ratio, and controlling the hydrogenation and hydrogen production integrated station based on the feed rate of each raw material. The method and device for controlling the hydrogenation and hydrogen production integrated station provided by the present disclosure can improve the energy utilization efficiency of the hydrogenation and hydrogen production integrated station.

The invention relates to the technical field of hydrogen production, in particular to a device for producing hydrogen by using wastewater. According to the device for producing hydrogen by utilizing the wastewater, the heat exchange mechanism is mounted in the first wastewater treatment tank, so that waste heat generated by electrolysis can be used for removing volatile components in the wastewater, energy recycling is realized, and the hydrogen production cost is effectively reduced; a first exhaust pipe of the first wastewater treatment tank is connected with a waste gas treatment tank, a first liquid outlet pipe is connected with a second wastewater treatment tank, a stirring assembly and a heater are mounted in the second wastewater treatment tank, the second wastewater treatment tank is provided with a second exhaust pipe, and the second exhaust pipe is connected with a condensation mechanism; a liquid discharge pipe of the condensation mechanism is connected with an electrolytic hydrogen production mechanism, the electrolytic hydrogen production mechanism is provided with an electrode assembly, a hydrogen collection mechanism and an oxygen collection mechanism, and the electrode assembly is connected with the heat exchange mechanism, so that hydrogen collection is realized, and oxygen can also be collected.

The invention belongs to the technical field of hydrogen storage materials, and particularly discloses a FeNi-C catalytic modified magnesium hydride hydrogen storage material, a preparation method and a hydrolysis hydrogen production method. The problem that magnesium hydride is poor in hydrolysis hydrogen release performance is solved. According to the invention, magnesium hydride is used as a main raw material, the magnesium hydride and a bimetallic catalyst FeNi-C prepared by a simple hydrothermal synthesis method are doped according to a certain mass ratio, and the magnesium hydride hydrogen storage material based on bimetallic FeNi-C catalytic modification is prepared by a high-energy planetary ball milling method. When the addition amount of the bimetallic catalyst FeNi-C is 5 wt%, the hydrolysis hydrogen production performance of magnesium hydride is greatly improved, and the hydrolysis reaction activation energy of magnesium hydride is effectively reduced. The method is simple, high in hydrogen production efficiency, mild in hydrogen production condition and small in pollution, and is expected to be applied to a portable power supply device or a hydrogen supply source of a fuel cell and the like.

The application discloses an electrolysis water self-supporting catalyst and a preparation method and application thereof, and the preparation method comprises the following steps: selecting carbonized wood as a substrate, placing the carbonized wood into a metal salt solution, and adopting an electrochemical deposition technology to in-situ electrodeposition of transition metals on the carbonized wood to obtain a precursor of metal and carbonized wood hybrid; and co-pyrolyzing the precursor and melamine, so that metal nanoparticles are coated in nitrogen-doped carbon nanotubes and in-situ grown on the carbonized wood to obtain the electrolysis water self-supporting catalyst, and the whole preparation process is simple and easy to control, and the prepared electrolysis water self-supporting catalyst has a three-dimensional hierarchical porous structure, high conductivity and good catalytic activity and stability, and can be used for industrial current density electrolysis water hydrogen production.

The invention provides a photo-thermal and photocatalysis composite system and a preparation method thereof, and relates to the technical field of photocatalysis. The photo-thermal and photocatalytic composite system comprises a floating carrier with a porous structure and a composite photo-thermal catalyst loaded on the upper half part of the floating carrier; in the photo-thermal and photo-catalytic process, the photo-thermal and photo-catalytic composite system is in a semi-immersed state, the upper half part used for photo-catalytic hydrogen production reaction floats above the liquid level, and the lower half part used for transporting water vapor is immersed below the liquid level. Compared with a traditional photo-thermal system, photo-thermal and photocatalysis are compounded in the same system, so that continuous proceeding of photo-thermal and photocatalysis is achieved, and higher water evaporation rate and hydrogen production efficiency are achieved under the same sun irradiation condition; the composite photo-thermal catalyst is loaded on the floating carrier with the porous structure, so that the continuous leaching of the composite photo-thermal catalyst is effectively reduced, the loss of the composite photo-thermal catalyst is reduced, and the retention rate of the composite photo-thermal catalyst is increased.

The invention discloses an electrolytic bath hydrogen production control method and device and electronic equipment. The method comprises the following steps: acquiring system data of a predetermined hydrogen energy system; under the condition that the hydrogen energy capacity in the hydrogen storage equipment is smaller than the preset capacity, whether a primary control result connected to the electric energy system is controlled or not is determined according to the comparison result of the wind energy power and the predicted use power; according to the primary control result, target energy supply power is determined; under the condition that the target energy supply power is greater than or equal to the predicted service power, determining the ratio of the predicted service power to the starting power of the electrolytic cell; according to the proportion, determining electrolytic cell control data; and sending a control instruction to the target electrolytic cell to control the target electrolytic cell to produce hydrogen. The technical problem of frequent start and stop during hydrogen production of the electrolytic cell is solved.

The invention discloses a nano porous nickel electrocatalyst material as well as a preparation method and application thereof. Belongs to the technical field of electrolyzed water hydrogen production catalysts. According to the method, a nickel net substrate is subjected to pretreatment, electrogalvanizing, high-temperature alloying and chemical dealloying, and finally the nano-porous nickel electrocatalyst material growing on the nickel net is obtained. The electrocatalyst material prepared by the method has a uniform three-dimensional nano porous structure, the thickness of a porous layer is 10-70 [mu] m, and the aperture is 100-500 nm. As an alkaline electrolytic water hydrogen evolution reaction cathode catalyst, the material has high specific surface area and rich active sites, and shows lower overpotential and excellent long-term stability. The method is simple in technological process, raw materials are easy to obtain, and the method has large-scale production potential and has wide application prospects in the field of hydrogen production through water electrolysis.

This invention discloses a process for in-situ decarbonization of oily sludge using autocatalytic gasification of sintering circulating flue gas to produce hydrogen-rich gas, which is then reinjected into the sintering machine. The core innovation of this process lies in the fact that it eliminates the need for additional catalysts and carbon-fixing agents. It directly utilizes the metal oxides contained in the ash of the oily sludge as an autocatalyst and the calcium-based components as a carbon-fixing agent. Using sintering circulating flue gas as the gasification medium, under reaction conditions of 500-900℃, the autocatalytic gasification of the oily sludge and in-situ carbonization of CO2 are simultaneously achieved, thereby producing high-purity hydrogen-rich gas. This hydrogen-rich gas is then reinjected into the sintering machine, replacing fossil fuels in sintering production. Simultaneously, the iron- and calcium-rich residue generated after the reaction is recycled back into the ore and used as sintering raw material in the sintering process, realizing the resource recovery of valuable elements. This invention effectively achieves waste resource utilization, process decarbonization, and energy cascade utilization, significantly reducing the total carbon emissions and production operating costs of the sintering process.

This invention discloses a method and system for hydrogen production using recycled PET waste and wastewater, belonging to the field of hydrogen production technology. The method involves immersing the lower half of a microreactor with a three-dimensional porous structure into an alkaline PET depolymerization solution. The alkaline PET depolymerization solution is made from PET waste, wastewater, and an alkaline catalyst. Utilizing the photothermal conversion capability of the microreactor under illumination, the solution is driven upwards to the high-temperature upper half of the microreactor, where vigorous evaporation occurs, producing water and ethylene glycol. The alkaline catalyst is concentrated, precipitated, and participates in catalysis at the evaporation interface. The mixed steam undergoes a KOH catalytic reforming reaction in the high-temperature zone of the microreactor to produce hydrogen. The water vapor is condensed and recovered, and the alkaline catalyst is directly collected. The alkaline catalyst achieves in-situ regeneration and recycling, and absorbs carbon emissions generated during the reaction, achieving zero pollution and high-purity hydrogen production. This invention achieves green energy hydrogen production and plastic degradation through an integrated design of alkaline degradation, alkaline catalysis, and alkaline recovery.