90 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 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 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 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 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.

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 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.

A hydrogen production system of the present disclosure includes an electrolytic device, a plurality of electrical power conversion devices that convert three-phase AC power to DC power and supply the DC power to the electrolytic device, and a control device that controls the electrical power conversion devices. The electrolytic device is connected with the plurality of electrical power conversion devices connected in parallel with each other. The control device is configured to correct, when electrical power supply from some of the plurality of electrical power conversion devices to the electrolytic device is stopped, at least one of voltage and current of the electrical power conversion device that is continuing electrical power supply to the electrolytic device so that a later hydrogen production amount of the electrolytic device approaches a predetermined target amount.

The invention relates to a method and plant for producing hydrogen comprising an electrochlorination unit (10) and a water electrolysis unit (11). In the electrochlorination unit (10), seawater (12) or brine is electrolyzed to produce a liquid hypochlorite stream and an oxygen-polluted hydrogen gas stream. The hydrogen gas is separated from the liquid phase in a degasser vessel (18). High-purity hydrogen produced in the water electrolysis unit (11) from demineralized water (22) is divided into two portions, one portion (37) being mixed with the oxygen-polluted hydrogen in the degasser vessel (18) to form a non-flammable mixed gas, and the other portion (38) being supplied to an ejector (50) for compressing and further concentrating the mixed hydrogen. Optionally, residual oxygen is removed in a DE-OXO unit (54). The invention enables recovery and utilization of hydrogen from electrochlorination processes while improving overall hydrogen yield and safety.

The invention discloses a biomass gasification hydrogen production process based on Brown gas combustion activated water vapor, and particularly relates to the technical field of biomass energy conversion, and the biomass gasification hydrogen production process comprises the following steps: S1, preparing Brown gas with the hydrogen-oxygen volume ratio of 2: 1 by electrolyzing water, S2, introducing the Brown gas into a combustion chamber for combustion to generate activated water vapor with the temperature not lower than 1800 DEG C, s3, introducing the activated water vapor into a biomass gasification furnace, and carrying out gasification reaction on the activated water vapor and a biomass raw material at 800-1000 DEG C to generate crude synthesis gas, and S4, purifying the crude synthesis gas to obtain high-purity hydrogen. According to the invention, high-temperature activated water vapor generated by Brown gas combustion is used as a gasifying agent, and the activated water vapor is rich in hydroxyl radicals, has high thermodynamic activity and chemical activity, and can significantly improve gasification efficiency, promote water-gas shift reaction and deeply crack a tar precursor; therefore, the excellent effects of high hydrogen yield and low tar content are achieved.

The present disclosure provides a process for producing hydrogen in an aqueous phase reforming process using water-soluble oxygen-containing hydrocarbons under improved conditions. The process of the present invention can be used to produce hydrogen from glycerol under reduced pressure and significantly increase hydrogen yield.

The application provides a sulfur-containing acid natural gas reforming hydrogen catalyst and a preparation method thereof. Specifically, the catalyst comprises molybdenum disulfide and aluminum silicate, and the mass ratio of molybdenum disulfide to aluminum silicate is 1:9-9:1; preferably, the mass ratio of molybdenum disulfide to aluminum silicate is 2:8-8:2. The molybdenum disulfide / aluminum silicate catalyst shows good activity, selectivity and hydrogen yield in the process of H2S and CH4 reforming hydrogen in the presence of CO2.

The invention provides an adsorption enhanced methane steam reforming hydrogen yield prediction method, aims to solve the problems existing in the existing adsorption enhanced methane steam reforming (SE-SMR) hydrogen yield prediction method, and can more accurately predict the hydrogen yield in the SE-SMR process through an innovative Transform-Bagging model by adopting a K fold cross validation method to train the model. The experimental cost and time consumption are reduced, and the problems that an existing machine learning method cannot effectively capture the nonlinear relation between the input parameters during prediction, and the prediction precision is poor under the unsteady state working condition are solved. Reliable technical support is provided for optimization and actual production of an SE-SMR hydrogen production process, and the method has remarkable economic value and good engineering applicability.

This invention discloses a Fe2O3-MoO3-CaO oxygen carrier, its preparation method, and its application, belonging to the field of oxygen carrier technology. The technical solution includes the following steps: 1) Preparation of Fe2O3: NaOH solution is slowly added to FeCl3 solution while stirring for 3-5 hours; then sodium dodecyl sulfate is added to the sol, and the above system is transferred to a high-pressure reactor for hydrothermal reaction and calcination to obtain Fe2O3 powder; 2) Preparation of Fe2O3-MoO3 composite material; 3) Preparation of Fe2O3-MoO3-CaO oxygen carrier. The oxygen carrier prepared by this invention has high hydrogen yield and high NH3 conversion rate, good cycle stability, stable crystal form, and maintains high activity after multiple redox cycles, meeting the requirements for industrial recycling.

The invention relates to the technical field of power utilization of factories, and discloses a clean intelligent energy supply system for factories, which comprises a photovoltaic power generation system for converting solar energy into electric energy which is respectively used for an energy storage system and a hydrogen energy power generation system; the hydrogen energy power generation system converts electrolytic hydrogen into electric energy and transmits the electric energy to the energy storage system; the energy storage system is responsible for storing electric energy; the electric energy distribution system distributes electric energy of the energy storage system to factory equipment. The intelligent energy supply system collects photovoltaic power, hydrogen yield, energy storage charge state and equipment power demand in real time, predicts future factory total load and key equipment fluctuation based on deep learning, generates a dynamic electric energy distribution strategy and outputs the strategy to the electric energy distribution system, and adjusts power supply power in combination with the energy storage state. Meanwhile, the voltage of key equipment is monitored, and when fluctuation exceeds a threshold value, early warning is triggered and a multi-stage response mechanism is started. According to the invention, intelligent overall planning of the electric energy distribution system is realized, and the stability and safety of factory power supply are guaranteed.

This invention proposes a boron-phosphorus co-doped multi-element alloy catalyst supported on a metal oxide substrate, its preparation method, and its application. It belongs to the technical field of sodium borohydride hydrolysis hydrogen production materials. The method involves loading cobalt salts (such as cobalt chloride or cobalt nitrate), iron salts (such as ferric chloride or ferric nitrate), and hypophosphite (such as sodium hypophosphite) onto a support (such as γ-alumina or titanium dioxide) using an initial wet impregnation method. Sodium borohydride solution is added for chemical reduction, and boron is added for doping. After washing the reduction product, the catalyst is dried to obtain the supported boron-phosphorus co-doped multi-element alloy catalyst. When used as a sodium borohydride hydrolysis hydrogen production catalyst, it provides a maximum hydrogen production rate of 12729.78 mL·g under optimal conditions. cat ‑1 ·min ‑1 It produces 100% of the theoretical hydrogen yield and features good catalytic performance, simple preparation method, abundant raw materials, and low cost.

The invention belongs to the technical field of phosphorus-catalyzed biomass graded pyrolysis and gasification processes, and particularly relates to a method for co-producing hydrogen and functionalized biochar by phosphorus-catalyzed biomass graded pyrolysis and gasification, which comprises the following steps: accurately regulating and controlling the impregnation ratio of phosphoric acid, carrying out low-temperature pyrolysis and then carrying out high-temperature gasification, and introducing a water-gas shift and pressure swing adsorption purification unit. The hydrogen yield and the hydrogen utilization rate are remarkably improved, the phosphorus-doped functional biochar with high specific surface area, developed pore structure and high thermal stability is prepared, and collaborative optimization and economical efficiency improvement of gas-carbon co-production are realized.

The application discloses a fault detection method and device for aluminum hydrolysis hydrogen production, and relates to the technical field of aluminum hydrolysis hydrogen production.The application creatively introduces the influence of an activating substance on the hydrogen production and output rate of the aluminum hydrogen production reaction in the reaction process, calculates an ideal gas pressure value in a reaction kettle according to the proportioning of the activating substance, compares the ideal gas pressure value with an actually monitored gas pressure value, further adopts a guided wave signal to troubleshoot the reaction kettle when there is a difference in the comparison result, and obtains a fault point of gas escape, so that the aluminum hydrogen production reaction fault detection under different proportions can be implemented, the application has high applicability and is easy to popularize.

A wide-concentration hydrogen production system and method integrating a high-temperature electrochemical hydrogen pump and water-gas shift reaction, belonging to the field of chemical technology, improves the hydrogen yield and fuel gas calorific value of the hydrogen production process from H2 / CO-containing by-product gas by means of gas membrane separation, pressure swing adsorption, and high-temperature electrochemical hydrogen pump separation technologies in different advantageous hydrogen separation ranges, and enhances the coupling of the water-gas shift reaction. The system of this invention features a "one-click adjustment" operation mode based on the hydrogen content of the by-product gas, strengthens the recovery of desorbed gas from pressure swing adsorption, and stably and economically produces fuel cell hydrogen under a wide range of raw material hydrogen and carbon monoxide concentrations, while producing high-calorific-value fuel gas as a by-product. It fundamentally avoids key problems that restrict the improvement of hydrogen yield, such as the difficulty in utilizing CO components in the by-product gas, the low hydrogen concentration in the desorbed gas from the pressure swing adsorption unit, and the difficulty in fully recovering hydrogen from the membrane separation permeate. This system meets the market demand for high-quality fuel cell hydrogen and high-calorific-value fuel gas while minimizing operating costs and overall energy consumption.

The invention relates to a naphtha catalytic reforming method which comprises the following steps: naphtha enters an aromatic hydrocarbon extraction unit for aromatic hydrocarbon extraction treatment to obtain raffinate oil mainly containing alkanes and cycloalkanes and extract oil mainly containing aromatic hydrocarbons; the raffinate oil enters a reforming unit to be in contact with a reforming catalyst for a reforming reaction, reformed hydrogen and a reformed product are obtained, and the reformed product is subjected to fractionation to obtain a C < 6 + > material flow; and the C6 + material flow and the extract oil enter an aromatic hydrocarbon separation unit for separation. The method disclosed by the invention can improve the effective treatment capacity of the reforming device, improve the yield of pure hydrogen and reduce the carbon deposit amount of the catalyst.

To provide a hydrogen generator capable of improving hydrogen production and producing clean energy.SOLUTION: The present disclosure provides a hydrogen generating apparatus. The hydrogen generation apparatus includes a plurality of cylinders, a plurality of combustion units disposed in the plurality of cylinders, respectively, and configured to combust fuel, a distribution unit configured to equally distribute fuel supplied from a fuel supply unit and transfer the fuel to the plurality of combustion units, respectively, a plurality of reaction units disposed in the plurality of cylinders, respectively, and configured to generate hydrogen by a reforming reaction of a feed supplied from a feed supply unit while being heated by combustion heat transferred from the combustion units, and a metering unit disposed between the distribution unit and the combustion unit and configured to adjust an amount of the fuel transferred from the distribution unit to the combustion unit to a constant amount. The metering unit may include: a connection pipe disposed between the distribution unit and the combustion unit; and an opening varying unit disposed in the connection pipe and varying an opening of the connection pipe according to a fluid pressure of the fuel.SELECTED DRAWING: Figure 1