187 results about "Hydrogen yield" patented technology

The invention relates to a multi-cell control method for hydrogen production alkaline electrolytic cells based on nonlinear model predictive control, which belongs to the technical field of hydrogen production and comprises the following steps of: performing data acquisition on key positions of a hydrogen production alkaline electrolytic cell system in real time; based on the dynamically determined priority of each electrolytic cell, dynamic load distribution of each electrolytic cell is carried out, and a multi-dimensional cooperative regulation strategy is implemented to obtain a hydrogen yield target value of each electrolytic cell; constructing a nonlinear model comprising an electrolytic reaction model, a heat transfer model and an inter-tank coupling model, and performing parameter identification and verification; and designing a nonlinear model predictive control algorithm, performing discretization processing on the nonlinear model, introducing Kalman filtering to process the uncertainty of the model, taking a corresponding hydrogen yield target value reached by each electrolytic cell on the premise of meeting the constraint as a final control target, constructing an optimized target function, and performing solving to obtain an optimal control scheme. Compared with the prior art, the control precision and the system stability can be effectively improved.

The invention relates to the technical field of hydrogen storage and release, and discloses a cyclic hydrogen storage and release system based on aromatic cycloalkane reaction, which comprises a hydrogenation reaction unit, a dehydrogenation reaction unit, a gas-liquid separation and compression unit and an adsorption and purification unit which are sequentially connected through pipelines, the hydrogenation reaction unit, the dehydrogenation reaction unit and the gas-liquid separation and compression unit are respectively connected with the heat exchange unit; the hydrogen storage function and the hydrogen desorption function are integrally designed, the microwave heat supply dehydrogenation reactor is designed for the dehydrogenation reaction link with high energy consumption, and compared with the prior art, the microwave heat supply dehydrogenation reactor has the advantages that the heat transfer resistance is reduced, the reaction efficiency is improved, and the energy loss is reduced. The designed gas-liquid separation and adsorption purification technology is coupled, only one compressor is used in the whole process, the purification process is effectively simplified, the operation is simple and convenient, the equipment cost and the hydrogen purification cost are reduced, and the hydrogen yield and the hydrogen storage carrier cyclic utilization rate are improved. The system has the advantages of high hydrogen storage and release efficiency, small system size, high mobility and the like.

The invention relates to the technical field of chemical-looping hydrogen production, and discloses a self-heating type chemical-looping hydrogen production and in-situ decarburization system and method.Hydrocarbon fuel is converted into hydrogen and carbon dioxide through a chemical-looping circular reaction, and meanwhile coupling of CO2 trapping and separation on the source side and chemical-looping hydrogen production of the hydrocarbon fuel is achieved through an absorbent; on the basis of in-situ separation of CO2, the hydrocarbon fuel conversion rate and the hydrogen yield are improved, the requirement for equipment needed by production is lowered, and meanwhile the energy efficiency level of a hydrogen production system is improved. Besides, the system can realize self-heating chemical looping hydrogen production and in-situ decarburization without external heat input through matching of a hydrogen production raw material, an oxygen carrier and CO2 absorbent particles, endothermic reduction of the oxygen carrier in the hydrogen production decarburization reactor and in-situ absorption and heat release of CO2, so that a series of problems of limited heat and mass transfer performance and the like existing in external heat driven chemical looping reaction are solved; and self-heat balance in the system can be realized, and the universality of the chemical looping technology is improved.

To provide a method of producing hydrogen capable of improving a production amount of hydrogen.SOLUTION: A method of producing hydrogen includes: pulverizing and mixing a material to be pulverized and a solvent using a planet ball mill device having a container housed with a pulverization medium to produce hydrogen by mechanochemical reaction. The solvent includes water, the material to be pulverized is at least one of a metal, or a metallic compound of the metal as a main constituent, a material of at least one of the container and the pulverization medium is a material capable of reducing an oxide and a hydroxide of a metal by mechanochemical reaction, and a speed of rotation of the planet ball mill device is 400 rpm or more.SELECTED DRAWING: Figure 10

The invention relates to the technical field of renewable energy consumption, in particular to a vehicle-hydrogen-steel collaborative green hydrogen fluctuation stabilizing method and system, a physical layer is provided with a wind-solar power generation device, an electrolytic hydrogen production device, a hydrogen storage buffer tank, a steel heat supply device, an electric vehicle and a V2G charging pile which are connected with one another through a hydrogen conveying pipeline and a power cable; the information layer takes the central regulation and control platform as a core, collects wind-solar power, hydrogen yield, steel hydrogen consumption and electric vehicle SOC by using sensors, and transmits the collected power, hydrogen yield, steel hydrogen consumption and electric vehicle SOC to the central regulation and control platform; the central regulation and control platform executes a hierarchical dynamic fluctuation regulation and control mechanism; when the fluctuation range of the hydrogen yield does not exceed a set value, the hydrogen is stabilized by controlling the hydrogen storage buffer tank to charge and discharge hydrogen; and when the fluctuation amplitude exceeds a set value, a V2G system is started, and stabilizing is carried out by controlling charging and discharging of the electric vehicle. On the premise that the special energy storage cost is not greatly increased, stable and low-cost supply of green hydrogen is achieved, and energy conservation and emission reduction of steel and other high-energy-consumption industries are achieved.

The invention discloses an alkaline electrolysis cluster power working medium two-level cooperative regulation and control method which comprises the following steps: step 1, establishing a full response surface model among hydrogen yield, temperature and power based on related parameters of an alkaline electrolysis cell; 2, solving the optimal power distribution of the alkaline electrolysis cluster by taking the maximum hydrogen production as a target and taking the safe operation domain as a constraint condition; 3, evaluating the working medium regulation and control condition of the system by taking the distributed power as a constraint condition and taking temperature stability, hydrogen concentration minimization in oxygen and working medium use minimization as targets; 4, whether the system temperature obtained in the step 3 meets the convergence condition of the temperature used in the step 2 or not is judged, and if yes, a regulation and control strategy is output; and if not, substituting the temperature obtained in the step 3 into the step 2 again for calculation. In conclusion, the hydrogen production efficiency and the operation stability are both considered through the cooperative scheduling architecture of the upper layer and the lower layer, support is provided for maintaining the system temperature and the hydrogen concentration in oxygen to be stable while the operation efficiency of the alkaline electrolysis cluster is ensured, and more practical operation guidance is provided for optimal scheduling of the alkaline electrolysis cluster.

The present invention provides a method for hydrogen production from coke oven gas based on the electrochemical reduction of CO2 technology. The method includes gas pretreatment, multi-stage membrane separation, catalytic reaction, and electrocatalytic reduction. Particulates, tar, and moisture are removed through cyclone separation and activated carbon adsorption, and MDEA and zinc oxide desulfurization are combined to ensure gas purification; a multi-stage membrane separation technology is used to achieve the separation of high-purity hydrogen. Through high-temperature and low-temperature water gas shift and methane steam reforming reactions, CH4 and CO are efficiently converted to further increase the hydrogen production. The electrocatalytic reduction technology is innovatively adopted to convert CO2 into CO, H2, and HCOOH to achieve carbon resource recycling. The present invention has the characteristics of high efficiency, low consumption, and low carbon, and is applicable to the deep purification and resource utilization of coke oven gas.

The invention relates to an electrolytic cell array power distribution method and system considering hydrogen production efficiency, and a medium. The method specifically comprises the following steps: converting received to-be-consumed electric power into to-be-optimized power of an electrolytic cell array; calculating the initial operation optimal power of the electrolytic cell array by taking the maximization of the efficiency and the hydrogen yield of the electrolytic cell array as a target, and obtaining segmentation execution information according to the to-be-optimized power of the electrolytic cell array and the initial operation optimal power of the electrolytic cell array on the basis of a set distribution rule; obtaining a power distribution instruction based on the segment execution information; and each electrolytic cell in the electrolytic cell array adjusts the corresponding hydrogen production power according to the power distribution instruction. The power distribution method provided by the invention not only can consume surplus renewable energy sources, but also can improve the hydrogen yield under the condition of not increasing the system equipment cost, reduce the start-stop frequency of the electrolytic cell, improve the utilization rate of the electrolytic cell and prolong the service life of the electrolytic cell.

The invention discloses an off-grid photovoltaic hydrogen production system double-layer optimization method, device and equipment and a storage medium, and the method comprises the steps: constructing an off-grid photovoltaic hydrogen production system based on a battery energy storage unit, a photovoltaic power generation unit and a hydrogen energy conversion unit, and constructing a double-layer optimization model comprising an upper-layer constant volume optimization model and a lower-layer operation optimization model; the upper-layer constant volume optimization model takes the maximization of the total yield of green hydrogen in the whole life cycle of the system as a target and takes the system capacity configuration as a decision variable; the lower-layer operation optimization model takes green hydrogen yield maximization in the current scheduling time period of the system as a target and takes a system operation strategy as a decision variable; and an optimal capacity configuration scheme and an optimal operation strategy are obtained by solving the double-layer optimization model, so that the utilization efficiency of the system on renewable energy sources is improved, the overall low-carbon benefit is enhanced, and the potential of the electrolytic cell is fully played.

The invention relates to a device for preparing high-calorific-value low-carbon fuel from biomass, and belongs to the technical field of chemical equipment. The device comprises a stock bin, a fluidized bed pyrolyzing furnace, an overflow channel, a fluidized bed gasification furnace and a cyclone separator which are sequentially connected, the cyclone separator is communicated with the fluidized bed pyrolyzing furnace, and the fluidized bed gasification furnace is connected with a microwave generator; the bottom of the fluidized bed pyrolyzing furnace is communicated with an oxygen-poor gas input pipeline, and the bottom of the fluidized bed gasifying furnace is communicated with an oxidizing gas input channel. The biomass gasification reaction is divided into a pyrolysis process and a gasification process by the double fluidized beds, the two processes are decoupled, and a plurality of functional groups related to hydrogen production are generated by low-temperature pyrolysis in the fluidized bed pyrolyzing furnace, so that the yield of hydrogen is increased; microwave heating is introduced into the fluidized bed gasification furnace, so that the gasification furnace can reach the required temperature more quickly, meanwhile, pyrolysis products are converted through microwave targeting energy, generation of tar and methane is remarkably reduced, and generation of hydrogen production reaction is facilitated, so that high-calorific-value low-carbon fuel is generated.

The invention discloses a preparation method of a Sn-Bi-Ni-Cu quaternary liquid alloy methane cracking catalyst, production raw materials comprise composite melt metal and composite transition metal, and the mass ratio of the composite melt metal to the composite transition metal is 1: (0.3-1.2); the composite melt metal is composed of Sn and Bi according to the mass ratio of 1: (1.3-1.7); the composite transition metal is composed of Ni and Cu according to the mass ratio of 1: 0.15-1.2. The quaternary liquid alloy catalyst has the advantages that: 1) compared with the existing catalyst for hydrogen production by methane cracking, the quaternary liquid alloy catalyst provided by the invention can stably operate for more than 1000 hours in a range of normal pressure to 3MPa and air speed of 100-100mL. G <-1 >. H <-1 >, the active phase retention rate is more than 95%, and the quaternary liquid alloy catalyst is especially suitable for alkane pyrolysis hydrogen production, CO2 hydrogenation and easy carbon deposition reaction systems, and has a wide application prospect; a new material design thought and an engineering implementation scheme are provided for the field of liquid metal high-temperature catalysis; and 2) experiments show that the quaternary liquid alloy catalyst prepared by the method provided by the invention can significantly improve the carbon sequestration rate and the hydrogen yield.

The invention discloses a cooperative control system and method for an electrolytic hydrogen production electrolytic tank and an assembly rack, and belongs to the technical field of cooperative control, and the cooperative control system comprises an electrolytic hydrogen production first execution path determination module, a first cooperative control execution module and a second cooperative control execution module. The working parameters of the electrolytic cell and the posture of the assembly rack can be dynamically adjusted based on the electrode bubble stability index and the electrolytic cell operation imbalance index, so that the bubble shielding effect and local current density fluctuation are relieved in time, and the balance of the electrolysis states of left and right polar plates is ensured; and the scale factor and the continuous tracking monitoring duration are controlled by matching the adjusting rhythm, so that the self-adaptive monitoring and quick response to the running state of the electrolytic cell are realized. The operation stability of the electrolytic tank and the uniformity of the hydrogen yield are improved, and the electrolytic hydrogen production efficiency is optimized, the service life of equipment is prolonged and the self-adaptive intelligent control of the whole system is realized.

The utility model discloses a spiral-flow type coal water slurry process burner. The spiral-flow type coal water slurry process burner comprises a three-channel structure, the three-channel structure sequentially comprises a central oxygen channel, a coal water slurry channel and an outer epoxy channel from inside to outside; the central oxygen channel, the coal water slurry channel and the outer epoxy channel are connected through flanges; a cooling water assembly is arranged on the outer side of the outer epoxy channel; a central oxygen cyclone is fixed on the inner wall of the central oxygen channel and comprises a cyclone bracket and a first cyclone sheet; one end, far away from the burner head, of the rotational flow bracket is in a pointed cone shape; the first swirl piece is formed by stretching a first end face along a curve, and a first adjacent side face of the first swirl piece is fixedly connected with the swirl support. Through a rotational flow form, the mixing effect of oxygen and coal water slurry is enhanced, and the purpose of sufficient mixed combustion is achieved, so that the carbon conversion rate is improved, the yield of carbon monoxide and hydrogen serving as main components in the period of validity is improved, efficient and clean utilization of coal resources is realized, and the production cost is reduced.

The invention discloses an energy system integrating water electrolysis hydrogen production and a hydrogen gas turbine, which comprises an oxygen-enriched preparation membrane separation module for processing air and outputting oxygen-enriched gas, a wind and light prediction calculation module for analyzing wind speed and illumination data to generate an electric energy output curve, and an electrolysis power distribution module for distributing power to a water electrolysis hydrogen production unit according to the electric energy output curve. The oxygen-enriched combustion simulation module calculates combustion field distribution. The coupling driving control module collects hydrogen yield and combustion efficiency data and adjusts the rotating speed of the hydrogen gas turbine; the parameter monitoring feedback module collects parameters of each module and transmits deviation values. Meanwhile, oxygen-enriched preparation, power distribution, wind and light prediction and combustion simulation, wind and light prediction calculation and oxygen-enriched combustion simulation are optimized by the system through a specific model and algorithm, the coupling driving control module further comprises a plurality of functional units, each module is started according to six steps during operation, and the system ensures stable combustion efficiency of the hydrogen gas turbine and is high in reliability. And finally, the comprehensive performance of energy utilization in the plateau anoxic environment is remarkably improved.

The application relates to the technical field of catalyst preparation, and discloses a copper-based catalyst for hydrogen production by methanol steam reforming and a preparation method thereof, which is prepared by adopting a precipitation method-ball milling method with multiple precursors of copper, zinc, aluminum, titanium and lanthanum as raw materials, specifically, metal salts including copper and zinc are dissolved to obtain A liquid; an alkali solution is prepared to obtain B liquid; in a solvent system, an aluminum precursor and a lanthanum salt are heated and dried to obtain a modified alumina carrier; A liquid and B liquid are blended and reacted, and after the reaction, the modified alumina carrier is added and aged to obtain a precursor; and the precursor and a titanium source are ball milled and then calcined to obtain the catalyst. The copper-based catalyst obtained by the application has excellent methanol low-temperature conversion activity, hydrogen yield and high-temperature resistance.

The invention belongs to the technical field of catalyst preparation, and discloses a multifunctional spinel catalyst, a preparation method thereof and application of the multifunctional spinel catalyst in plastic microwave catalytic cracking. The preparation method of the multifunctional spinel catalyst comprises the following steps: ultrasonically mixing ferric salt, aluminum salt, citric acid, water and a carbon source, and stirring to obtain gel; and sequentially drying and calcining the gel to obtain the multifunctional spinel catalyst. According to the obtained multifunctional spinel catalyst, through the synergistic effect of Fe-Ni, Fe-Co and the like, the activity of the catalyst is improved, the hydrogen yield is remarkably increased to 54.79 mmol / g, the anti-sintering capacity of the catalyst is improved through carbon source loading, and the catalytic life is prolonged; the absorptivity of the obtained multifunctional spinel catalyst at the frequency of 2.45 GHz reaches 90% or above, and uniform microwave heating of plastic is guaranteed.

The invention relates to the technical field of solar heat utilization, and discloses a solar methanol reforming and hydrogen separation integrated spiral hydrogen production system which comprises a reaction tube, a spiral hydrogen selective permeable membrane, a feeding system, a sweeping pipeline and the like. The temperature and flow of the feeding system and the sweeping system can be adjusted in real time according to the solar irradiation change, the reaction tube outlet exhaust temperature, the hydrogen yield and the catalyst bed temperature, optimal energy flow matching is achieved, and the energy utilization rate of the system is increased. Meanwhile, by adopting the reaction area and the sweeping area which are designed spirally, on one hand, the temperature uniformity of a reaction tube catalyst bed can be improved, and the sintering risk of a catalyst is reduced; on the other hand, by means of the rotational flow effect of the spiral structure, the hydrogen concentration polarization phenomenon can be effectively relieved, the hydrogen permeation amount is increased while hydrogen in-situ separation is achieved, and the pure hydrogen yield of the system is increased. The device has the characteristics of wide working condition application range, high methanol conversion rate, low hydrogen separation cost, compact structure and the like.

The invention discloses a preparation method and application of a hollow spherical high-entropy catalyst with a controllable particle size, a spinel high-entropy oxide is used as a design basis to prepare a base metal high-entropy catalyst with an (ABCDE) 3O4 configuration (five metal components A, B, C, D and E comprise Fe, Co, Ni, Cr and Mn, or four of the five metal components A, B, C, D and E is a combination of any four of Fe, Co, Ni, Cr or Mn, and one of the five metal components A, B, C, D and E is any one of Mg or Zn), can be applied to a catalytic reforming technology to prepare hydrogen-rich synthesis gas, and has excellent catalytic performance on pyrolysis / gasification volatile components of complex components and excellent selectivity on hydrogen. In addition, the catalyst has the characteristics of high temperature resistance, multiple functions, high activity, high selectivity, carbon deposition resistance, long service life and the like, the hydrogen yield can be greatly improved, and stable catalysis can be carried out for an extremely long time.

A method and apparatus for regenerative hydrogen separation at high temperatures for production of pure hydrogen gas. Pure metals and metallic alloys are used at high temperatures to maximize the catalytic effect for hydrogen dissociation, hydrogen diffusion and hydrogen sorption capacity. Metallic materials are used that can selectively sorb hydrogen at high temperatures. These materials are integrated into equipment designs and process configurations to process a stream of hot mixed process gases to produce a stream of pure hydrogen product at the desired system temperature. The invention can be used to enhance the performance of existing plants such as steam methane reforming applications by increasing the conversion to hydrogen, eliminating or reducing the number of shift converters, providing pure hydrogen product, and enhancing the overall energy efficiency. In some embodiments, the hydrogen sorption system is built inside a hydrogen production reactor, enhancing the chemical equilibrium inside the reactor, to achieve higher conversion and hydrogen yields.

The invention provides a hydrogen generator of an intelligent networked new energy automobile seat cabin, and belongs to the field of hydrogen generating devices. Comprising a hydrogen production tank; the drying part is positioned in the hydrogen production box, is used for drying the hydrogen generated in the hydrogen production box, and is arranged to discharge the hydrogen from the hydrogen production box after the drying part finishes drying the hydrogen; the concentration detection part is mounted on the outer side wall of the hydrogen production box and is used for measuring the concentration of hydrogen discharged by the drying part; the purity detection part is connected with the hydrogen production box through a gas guide pipe and is used for measuring the purity of the hydrogen discharged by the drying part. The concentration detection part and the purity detection part are arranged to carry out concentration and purity detection on hydrogen discharged after generation of the hydrogen production box, and under the condition that it is ensured that the whole generator does not have other problems, a user can be helped to judge whether the amount of electrolysis water added into the hydrogen generator is insufficient or not; or the hydrogen yield is reduced due to poor quality of the water for electrolysis, so that a user can adjust the water for electrolysis in time.

The invention relates to the technical field of new energy, in particular to a methanol-to-hydrogen reaction chamber temperature intelligent balancing system which comprises a coil pipe located in a reaction chamber and further comprises a first oil storage tank, a second oil storage tank and a mixing tank. The heat-conducting oil outlet of the first oil storage tank is connected with one heat-conducting oil inlet of the mixing tank through a first pipeline; the heat-conducting oil outlet of the second oil storage tank is connected with the other heat-conducting oil inlet of the mixing tank through a second pipeline; and the other end of the coil pipe is connected with the circulating oil inlet of the second oil storage tank. The second oil storage tank and the mixing tank are additionally arranged, and the proportion of heat conduction oil in the two tanks is adjusted through the intelligent control system, so that the temperature of the heat conduction oil in the coil pipe can be regulated, the temperature of the reaction chamber is accurately controlled, the hydrogen yield is increased, the service life of a catalyst is prolonged, and efficient and safe operation of the system is ensured.

The invention provides a step-by-step hydrogen and carbon monoxide preparation device and method, and relates to the technical field of energy conversion, the step-by-step hydrogen and carbon monoxide preparation device comprises a first reactor, a second reactor and a third reactor which have the same structure; oxygen carriers and absorbents are arranged in reaction cavities of the three reactors, a fuel steam inlet and an air inlet are formed in the gas inlet end of each reactor, and a hydrogen outlet, a carbon monoxide outlet and a nitrogen outlet are formed in the exhaust end of each reactor; heating devices are arranged in reaction cavities of the three reactors, control valves are arranged on fuel steam inlets, air inlets, hydrogen outlets, carbon monoxide outlets and nitrogen outlets of the three reactors respectively, and reaction stages in the three reactors are controlled by controlling opening and closing of the control valves and the temperature of the heating devices. Therefore, the three reactors respectively carry out reaction processes of three different stages at the same time. According to the invention, the hydrogen yield and hydrogen concentration can be improved, the reaction temperature is reduced, and the step-by-step preparation of high-concentration hydrogen and carbon monoxide is realized.

The invention discloses a method for producing hydrogen by catalytic gasification of oil-containing sludge, which comprises the following steps: directly feeding the oil-containing sludge into a fixed bed gasifier, pyrolyzing and cracking at the high temperature of 700-900 DEG C to generate hydrogen, methane and carbon oxides, and simultaneously generating solid carbon residues, arranging a catalytic wall compounded by 50% titanium-nickel alloy and 50% aluminum oxide in the gasifier, hydrogen release is promoted at high temperature, coke accumulation is reduced, the gasification efficiency is improved, airflow control is oriented, a high-temperature corrosion-resistant airflow guide plate with an adjustable angle is arranged in the gasification furnace, a gas flowing path is optimized, and the hydrogen yield is improved. Therefore, the solid oxide fuel cell and the tail gas recovery system achieve energy self-circulation and tail gas cracking, the overall energy utilization efficiency is improved, meanwhile, pollution of harmful organic matter is reduced through a TiO photocatalytic degradation system, the environmental protection property is improved, and compared with the background technology, the solid oxide fuel cell and the tail gas recovery system have the advantages of being simple in structure and convenient to use. The problems of low energy efficiency, poor hydrogen purity, high carbon emission and difficulty in byproduct treatment in the traditional technology are solved.

This disclosure relates to a two-stage purification method and system for fuel cell-grade hydrogen. The method involves first passing high-purity hydrogen feedstock purified from a PSA unit through a desulfurization unit to adsorb trace amounts of sulfides (such as hydrogen sulfide and carbonyl sulfide), and then introducing the desulfurized hydrogen into a decarbonization unit to adsorb trace amounts of carbon monoxide. This achieves effective removal of trace sulfides and carbon monoxide from the high-purity hydrogen. During operation, this method effectively adsorbs sulfides and carbon monoxide without requiring continuous pressure swing cycle adsorption. It offers a longer single adsorption cycle, more convenient operation, and easier start-up and shutdown. This method improves hydrogen purity and ensures hydrogen yield while simultaneously producing hydrogen for fuel cells.

The application discloses a three-tower series connection pressure swing adsorption device and a pressure equalization process thereof, adopts a set of pressure swing adsorption device, sets a multi-step series connection pressure equalization process, and adopts a three-tower simultaneous adsorption mode, so that the yield is obviously improved, the energy consumption and equipment investment are reduced, and the product gas quality is guaranteed. The three-tower series connection pressure swing adsorption device is used for pressure swing adsorption hydrogen extraction, the product hydrogen yield is obviously higher than that of an existing first-stage pressure swing adsorption hydrogen extraction device under the premise that the product hydrogen purity and impurity content meet high-purity hydrogen requirements, the three-tower series connection pressure swing adsorption device is used for pressure swing adsorption oxygen production and nitrogen production, and unit oxygen production power consumption and unit nitrogen production power consumption are obviously lower than the minimum index requirements in related standards under the premise that oxygen purity and nitrogen purity meet basic parameter requirements.

This invention discloses a two-step hydrothermal method for preparing nickel-iron bimetallic MOF derivatives and its application. By controlling the precursor structure through a two-step hydrothermal strategy, the nickel-iron bimetallic MOF derivative catalyst forms a foam-like hierarchical porous carbon framework. The metal nanoparticles are uniformly dispersed, small in size, and encapsulated by carbon layers, significantly improving the specific surface area and accessibility of active sites. It exhibits excellent hydrogen yield and anti-carbon deposition performance in plastic pyrolysis tar reforming. The synergistic effect of nickel and iron electrons effectively inhibits metal sintering and carbon deposition, and has good catalytic stability. This invention solves the problem in existing nickel-iron bimetallic MOF derivatives where phase separation easily occurs in one-step synthesis due to the difference in nucleation and growth rates between nickel and iron ions and organic ligands, leading to uneven metal distribution, increased particle size, underdeveloped pore structure, and low accessibility of active sites, thus affecting catalytic reforming activity and anti-carbon deposition ability.

The invention relates to the technical field of hydrogen preparation, and particularly discloses a method for preparing hydrogen through co-gasification of waste plastics and biomass. The method comprises the following steps: (1) baking biomass to obtain baked biomass and baked gas; (2) contacting the baked biomass, waste plastics and a waste catalytic cracking catalyst, and performing hot mixing to obtain a mixture; (3) carrying out co-gasification treatment on the mixture and water vapor under the assistance of microwaves to obtain co-gasified gas and co-gasified slag; (4) contacting the baking gas and the co-gasified gas with a reforming catalyst for reforming reaction to obtain reformed gas; and (5) removing acidic gas from the reformed gas to obtain hydrogen-rich gas. The method for preparing the hydrogen through co-gasification of the waste plastics and the biomass is good in gasification effect, high in hydrogen yield, small in pollution, capable of remarkably improving the added value of the biomass and the waste plastics, good in environmental benefit, social benefit and economic benefit and suitable for industrial popularization.

A process includes identifying a hydrocarbon-bearing reservoir containing a hydrocarbon fluid and a brine having a sufficient salinity level to prevent or inhibit one or more of methanogenesis and sulphate-reduction activity, and responsive to a concentration of hydrogen being below 1000 parts per million in a sample collected from the hydrocarbon-bearing reservoir, introducing at least one non-native or indigenous hydrogen producing microorganism or stimulating the activity of at least one indigenous bacteria capable of stimulating a microbial consortium to increase a production rate of hydrogen in the hydrocarbon-bearing reservoir.

The utility model discloses a differential pressure oxygen production hydrogen production system, including water supply module, electrolytic cell, hydrogen outlet module, oxygen outlet module, vent module and drain pipeline, and water supply module is connected with electrolytic cell and provides electrolytic water for electrolytic cell, and electrolytic cell is used for electrolytic water, and hydrogen outlet module is connected in the hydrogen outlet end of electrolytic cell, is used for purifying and conveying to hydrogen gas, hydrogen outlet module includes hydrogen pipeline, first silk screen filter, hydrogen purification unit, sampling unit, emptying unit and hydrogen outlet pipe, and first silk screen filter, hydrogen purification unit and hydrogen outlet pipe are set up on hydrogen pipeline, and emptying unit and sampling unit are connected on hydrogen pipeline in hydrogen purification unit gas outlet end, oxygen outlet module is connected in the oxygen outlet end of electrolytic cell, is used for conveying to oxygen, vent module is connected with hydrogen outlet module, and drain pipeline is connected in water supply module and vent module respectively. The system can be safe, efficient, stable operation, and hydrogen production is stabilized at 0.6 standard square / hour.

The invention discloses a process method for preparing green hydrogen by coupling biomass flameless pyrolysis gasification with steam reforming, and relates to the technical field of hydrogen energy preparation and organic solid waste recycling, and the process method comprises the following steps: in a high-frequency electromagnetic heating austenite alloy rotary kiln, carbon-containing organic matters are subjected to primary cracking by using a light quantum energy field excited by an alloy; combustible gas and solid carbon residues are mixed; the primary product is introduced into a light quantum reforming reactor, high-temperature superheated steam is introduced into the light quantum reforming reactor, in the reforming reactor, the high-temperature steam is dissociated into active [H] atoms and [OH] free radicals under the action of a light quantum field, the active [H] atoms and the [OH] free radicals are subjected to an efficient roaming chemical reaction with primary combustible gas and solid carbon, and hydrocarbon and carbon are preferentially converted into H2 and CO; finally, the reaction product is subjected to pressure swing adsorption or molecular sieve separation to obtain high-purity hydrogen, energy field precise excitation and chemical reaction cooperation are achieved, and the yield and selectivity of hydrogen are greatly improved.