457 results about "Hydrogen pressure" patented technology

The invention relates to the technical field of hydrogen storage system testing, and discloses a one-way valve combined hydrogen storage system durability test bench and a test method. A main control computer of the rack is used for configuring test task parameters, coordinating operation of subsystems and processing test data; the high-pressure hydrogen supply subsystem comprises a pressure-adjustable hydrogen source and a pressure closed-loop control module, and can apply accurate and controllable hydrogen pressure to the inlet end of the tested system according to test task parameters; the multi-channel valve state acquisition subsystem acquires the inlet and outlet pressure of the valve, the surface temperature of the valve body and vibration spectrum data in real time through pressure, temperature and vibration sensor arrays arranged at the valves, and transmits the data to the main control computer; the valve action driving subsystem comprises a high-speed electromagnetic actuator array and a displacement feedback module and can drive all valves to execute a preset opening degree sequence and opening and closing frequency. And the durability evaluation subsystem is embedded into the main control computer, calculates the accumulated damage degree of the valve and predicts the residual life cycle.

The purpose of the present invention is to provide: a steel material which is suitable as a steel structure used in a hydrogen gas environment, has excellent hydrogen absorption resistance in a hydrogen gas environment, and has excellent hydrogen embrittlement resistance; and a method for producing same.　The steel material has a specific component composition, wherein the amount of saturated hydrogen that has entered in a hydrogen gas environment at a hydrogen gas pressure of 40 MPa is less than a predetermined value. The predetermined value is 0.8 ppm by mass when the tensile strength TS of the steel material is less than 500 MPa, and is a hydrogen amount CH (ppm by mass) calculated from formula (1) when the tensile strength TS of the steel material is 500 MPa or more. (1): CH (ppm by mass) = 5.4637e-0.004 × TS (MPa) In formula (1), TS (MPa) is the tensile strength of the steel material.

The invention provides a hydrogen supply control method of a fuel cell system, a controller, a system and a medium, and relates to the technical field of fuel cells. The method comprises the steps that in response to a starting instruction, the opening degree proportion of a first proportional valve is controlled to be adjusted to K11 from K10 through a first PID control parameter, K10 is the opening degree proportion of the first proportional valve which does not allow hydrogen to pass at all, and K11 is the initial opening degree proportion of the first proportional valve at the current environment temperature; obtaining a current actual pile entering pressure value and a hydrogen pile entering pressure set value of the electric pile; the second PID control parameter is used for controlling the opening proportion of the first proportional valve to be adjusted till the deviation between the actual reactor entering pressure value and the hydrogen reactor entering pressure set value is within the allowable error range, and the proportionality coefficient of the first PID control parameter is larger than that of the second PID control parameter. According to the method, the stability of hydrogen pressure is improved, so that the stability and the service life of the fuel cell system are improved.

The invention relates to the field of solid hydrogen storage, in particular to a nanocrystalline vanadium-based hydrogen storage material as well as a preparation method and application thereof. The invention provides a method for simply preparing a nanocrystalline vanadium-based hydrogen storage material by a mechanical alloying method, and the preparation method comprises the following steps: 1, crushing vanadium: carrying out vacuum heat treatment on a vanadium block, and adding hydrogen pressure at room temperature to carry out hydrogenation crushing treatment; and 2, in an inert atmosphere, carrying out mixing and ball-milling reaction with an oxide to prepare the nanocrystalline vanadium-based hydrogen storage material. The nanocrystalline vanadium-based material is directly prepared in a ball milling mode, the preparation process and operation are simple, the production period is short, energy consumption is low, and the method is suitable for large-scale production. The nanocrystalline vanadium-based material only contains vanadium and hydrogen, the reversible hydrogen storage capacity is 1.6 wt% at the temperature of 50 DEG C, the hydrogen desorption platform pressure is 6.3 bar, and the capacity retention rate is 96% after 10 times of hydrogen absorption and desorption cycles at the temperature of 30 DEG C.

The invention relates to the technical field of organic synthesis, in particular to a synthesis method and application of functional caprolactam and functional nylon-6. The synthesis method comprises the following steps: in the presence of a catalyst and a solvent, enabling amino caprolactam and / or a derivative thereof to contact and react with benzaldehyde, so as to obtain functional caprolactam which is bis (benzyl) amino caprolactam, wherein the reaction conditions are as follows: the temperature is 150-350 DEG C; the hydrogen pressure is 0.1 to 10 MPa; the time is 5-15 hours. The synthesis method not only has the advantages of high reaction efficiency, high catalytic efficiency, adjustable target product selectivity and the like, but also simplifies process conditions, and realizes green large-scale production.

The invention relates to the technical field of hydrogen energy storage and control, and discloses a hydrogen storage tank pressure and temperature control method and device based on model predictive control, and the method comprises the steps: determining a hydrogen state equation of a hydrogen storage tank, and constructing a hydrogen mass conservation equation and a hydrogen energy conservation equation; based on the hydrogen mass conservation equation and the hydrogen energy conservation equation, a state prediction model of the hydrogen storage tank state related to the net hydrogen flow change is established, and the hydrogen storage tank state comprises hydrogen pressure and hydrogen temperature; a target function is constructed with the hydrogen storage tank state and the net hydrogen flow as control targets, and constraint conditions are configured; on the basis of the input net hydrogen flow sequence of the state prediction model and the predicted hydrogen storage tank state sequence output by prediction, the target function is subjected to minimum solving, and the optimal net hydrogen flow sequence is obtained through iteration; and adjusting an inlet / outlet valve of the hydrogen storage tank based on the optimal net hydrogen flow sequence. The operation efficiency of the hydrogen storage system can be improved.

The invention relates to the technical field of pressure reducing valves, and discloses a high-pressure hydrogen pressure reducing valve and a using method thereof.The high-pressure hydrogen pressure reducing valve comprises a valve pipe assembly, the valve pipe assembly comprises a hydrogen filtering assembly, the two ends of the hydrogen filtering assembly fixedly communicate with valve shells, and the top of the hydrogen filtering assembly fixedly communicates with a gas valve assembly; one end of the hydrogen filtering assembly is fixedly sleeved with an electric heating ring sleeve, the other end of the hydrogen filtering assembly is rotationally connected with a fan wheel, the side face of the fan wheel is rotationally sleeved with a magnetic cutting element, the bottom of the fan wheel is fixedly connected with a rotating wheel, and one end of the inner side of the bottom of the valve shell fixedly communicates with a magnetic cylinder. The problem that groove-shaped erosion marks appear on the sealing face of the valve seat due to the fact that metal impurity particles in a pipeline of the pressure reducing valve impact the valve element and the valve seat along with high-speed hydrogen flow is solved, the metal impurity particles attached to the magnetic cylinder can be recycled, and the problems that resources are wasted and the surface of an outlet of a valve body is frosted when high-pressure hydrogen expands through throttling are solved.

The invention relates to the technical field of polyolefin degradation, in particular to an EMT / FAU eutectic molecular sieve catalyst and a preparation method and application thereof. The EMT / FAU eutectic molecular sieve catalyst is obtained by physically mixing an acidic molecular sieve and a Pt-loaded TS-1 molecular sieve, and the mass ratio of the acidic molecular sieve to the Pt-loaded TS-1 molecular sieve is 1: 1. The method comprises the following steps: carrying out ammonium ion exchange on an EMT / FAU eutectic molecular sieve to obtain an acidic molecular sieve; pt is packaged by using a TS-1 molecular sieve so as to provide abundant metal hydrogenation sites; an acid site-metal series system is constructed through an acid molecular sieve and a Pt-loaded TS-1 molecular sieve, polyethylene can be converted into short-chain alkane under a mild condition, liquid products are distributed more intensively, and the problems that an existing molecular sieve catalyst is too high in hydrogen pressure in a polyethylene hydrocracking reaction, and the reaction time is shortened are solved. The energy consumption is high; and reaction products are not distributed intensively.

The invention relates to the technical field of fuel nozzles, and discloses a hydrogen fuel nozzle head structure with a hydrogen pressure stabilizing cavity, the center of a head flow guide disc is provided with a cavity structure, the cavity structure can serve as the pressure stabilizing cavity to stabilize the pressure of injected hydrogen, and the pressure of hydrogen entering an air jet hole is stable; hydrogen and air can be mixed more uniformly; a whole circle of air jet holes are distributed in the radial direction, a whole circle of circumferential hydrogen channels are formed in the radial inner side and the radial outer side of each circle of air jet holes, each air jet hole is provided with a radial hydrogen jet hole in the vertical direction, and a multi-point direct injection structure is formed, so that the airflow speed is increased, the combustion flame stopping time is shortened, micro-mixing diffusion combustion is achieved, and the NOx emission amount is reduced. The hydrogen fuel nozzle head structure is based on the characteristic that hydrogen is wide and suitable for combustion, the lean oil flameout boundary of a combustion chamber can be widened, and the wider working range of an engine is achieved.

The invention provides a hydrogen energy system and power grid collaborative complementary adjustment method and system, and relates to the technical field of energy management, and the method comprises the steps: obtaining a power grid load and renewable energy power generation data, calculating a supply-demand difference curve, switching the hydrogen energy system to a hydrogen production mode in a first target time period, and adjusting the hydrogen energy system to target hydrogen production power, switching to the power generation mode in the second target time period, adjusting the output power according to the supply-demand difference value, the hydrogen pressure and the working state of the battery, and recording the operation parameters to generate a cooperative operation evaluation report, thereby achieving the efficient complementation of the power grid and the hydrogen energy system, improving the energy utilization efficiency, and enhancing the power grid adjustment capability.

The invention discloses a magnetically separable reversed-phase catalyst, a preparation method thereof and application of the magnetically separable reversed-phase catalyst in hydrogenation upgrading recovery of aromatic polyester, and belongs to the technical field of reversed-phase catalysts and plastic recovery. The catalyst is formed by loading a metal oxide (MOx) on a metal carrier nickel, and is applied to hydrogenation recovery of aromatic polyester and conversion of aromatic polyester into high value-added aliphatic polyester. After dispersion, carrying out catalytic hydrogenation reaction on the aromatic polyester at a set temperature, a set rotating speed and a set hydrogen pressure, and completing conversion of the aromatic polyester after the reaction reaches a set time; according to the method, the aromatic polyester is completely converted into the fat polyester with high additional value by using the cheap and easily-separated reverse catalyst, so that the upgraded recycling of the polyester waste plastic is realized.

The present invention discloses a method for casting pipeline steel and steel billets for hydrogen energy transportation, as well as a method for producing steel plates. Chemical composition: C 0.021-0.076%, Si 0.07-0.21%, Mn 0.66-0.93%, Cr 0.12-0.30%, Ni≤0.24%, Cu≤0.24%, Nb 0.014-0.052%, V 0.014-0.050%, Ti 0.009-0.019%, Al 0.015-0.045%, Mg 0.0005-0.0012%, Ca 0.0012-0.0042%, and the remainder is iron and impurities. The invention modifies inclusions by adding trace amounts of magnesium and calcium, creating a large number of tiny irreversible hydrogen traps in the steel without causing an excessive increase in hydrogen pressure, thereby improving the steel's hydrogen resistance and HIC resistance.

The invention discloses a high-pressure hydrogen pressure reducing valve with a spiral flow channel structure. The high-pressure hydrogen pressure reducing valve comprises a valve body, a sealing end cover, a needle-shaped valve element and an inlet end cover. A through cavity is formed in the center of the valve body in the axial direction. The sealing end cover, the needle-shaped valve element and the inlet end cover are sequentially and coaxially assembled and connected into the cavity of the valve body from top to bottom. A gas outlet channel is arranged on the side wall of the valve body and located between the sealing end cover and the needle-shaped valve element, a gas inlet channel is arranged at the bottom of the inlet end cover, and gas enters from the gas inlet channel and is exhausted through the gas outlet channel. The needle valve has the advantages of being simple in structure and long in service life, and the two spiral flow channel notches are evenly distributed in the outer surface of the needle valve element; due to the design of the spiral flow channel, the hydrodynamic performance is effectively improved, the reliability of the system is enhanced, and meanwhile the energy utilization rate and the impact resistance are improved; in addition, the pressure of hydrogen at the outlet of the valve body can be effectively controlled through the design of the adjusting channel, and the pressure is still kept relatively stable under extreme conditions.

The invention discloses a fuel cell test bench safety monitoring execution method, device, equipment and medium, and relates to the technical field of fuel cell system bench testing.The method comprises the steps that the hydrogen pressure change rate, the hydrogen concentration value and the reference value of the hydrogen concentration change rate are set respectively; collecting a hydrogen pressure signal and a hydrogen concentration signal in the test bench; based on the collected hydrogen pressure signal and hydrogen concentration signal, calculating to obtain a hydrogen pressure change rate, a hydrogen concentration value and a hydrogen concentration change rate in the test bench; and respectively comparing the hydrogen pressure change rate, the hydrogen concentration value and the hydrogen concentration change rate obtained by calculation with set reference values so as to adjust the working state of the test bench. By monitoring and automatically adjusting the hydrogen pressure and concentration, the system can quickly respond to hydrogen leakage and automatically take measures to guarantee the test safety, the safety risk is reduced, and the test efficiency and quality are improved.

The invention relates to the technical field of high-pressure hydrogen storage of hydrogen fuel cell automobiles, and provides a high-pressure hydrogen storage bottle opening combination valve with a streamline runner and a control method. The combination valve integrates a high-pressure stop valve, a two-way flow regulating valve, a filter and a pressure / temperature / flow sensor, an air supply channel, an air inflation channel, a discharge channel and a cooling channel are designed, and the air supply channel and the air inflation channel are provided with a common rail type channel. A pilot-operated pressure reducing valve and a main runner bidirectional flow regulating valve are additionally arranged on the gas supply channel to form a two-stage pressure reducing system, so that the pressure and flow of hydrogen at an outlet are effectively limited, and the hydrogen is safely conveyed to a fuel cell; a redundant one-way valve is additionally arranged on an inflation channel to achieve rapid filling. Flow resistance and turbulent flow dissipation are remarkably reduced through a streamline channel, a sealing interface is reduced through modular integration, actuation response and power density are improved, and safety and stability of pressure reduction gas supply and high-pressure filling working conditions, intrinsic safety of the system and reliability of the whole life cycle are ensured.

The invention relates to a rare earth modified AB2 type solid hydrogen storage alloy and a batch preparation method thereof, belongs to the technical field of hydrogen storage alloy materials, and solves the problems of high activation condition, long activation period, overhigh hydrogen absorption platform pressure, high batch preparation smelting difficulty, low yield, unstable product quality and the like of the traditional Ti-Mn series hydrogen storage alloy in the prior art. The specific composition of the hydrogen storage alloy is Ti < 1.1-x-y > Y < x > Zr < y > Mn < 2.0-y-z-m > Cr < z > Ni < m > Co < n >, x, y, z, m and n in the formula are atomic ratios, x is larger than or equal to 0.01 and smaller than or equal to 0.04, y is larger than or equal to 0.10 and smaller than or equal to 0.35, z is larger than or equal to 0.45 and smaller than or equal to 0.70, m is larger than or equal to 0.1 and smaller than or equal to 0.2, and n is larger than or equal to 0.05 and smaller than or equal to 0.15. The hydrogen storage alloy has good activation performance and hydrogen absorption and desorption performance, the hydrogen storage capacity is larger than or equal to 1.86 wt.%, and the hydrogen absorption and desorption platform pressure can be adjusted according to application requirements; under the conditions that the temperature is 20 DEG C and the initial hydrogen pressure is 3 MPa, activation can be completed through one-time hydrogen absorption and desorption circulation; after 200 times of hydrogen absorption and desorption cycles, the capacity retention ratio of the alloy is gt; and 98%. The invention further provides a preparation method of the hydrogen storage alloy, the method has the advantages of being simple and easy to operate, high in yield, stable in product quality and the like, and the problem of component segregation of a casting process is fundamentally solved.

A hydrogen pressure reducer for a hydrogen supply system of a hydrogen fuel automobile relates to the technical field of hydrogen pressure reducers and comprises a valve body, a diaphragm type pressure reducing mechanism, a pilot-operated electromagnetic valve, a gas inlet and a gas outlet. The interior of the valve body is divided into a high-pressure cavity and a low-pressure cavity through the valve The diaphragm type pressure reducing mechanism is composed of a valve element assembly, a diaphragm assembly and a pressure adjusting assembly which cooperate to enable the output pressure of the air outlet to be kept stable, and assembly errors are eliminated. The valve element assembly is provided with a necking part to adjust the opening degree of a throttling hole, and accurate control is achieved. The base provides guiding constraint, and reliable sealing is ensured. The diaphragm assembly adopts a supporting disc, a diaphragm, a pressing disc and a locking nut fixing structure, so that the diaphragm is prevented from deforming, and the service life is prolonged. The pressure adjusting assembly comprises an upper cover, a pressure adjusting spring, a pressure adjusting spring seat and a pressure adjusting stud, and the pressure adjusting accuracy and stability are guaranteed. The overall reliability, sensitivity and safety of the hydrogen pressure reducer are improved.

The utility model discloses a hydrogen fuel cell automobile high-pressure hydrogen storage tank pressure energy recovery device which comprises a first-stage hydrogen pressure reduction module, a second-stage hydrogen pressure reduction module, a third-stage hydrogen pressure reduction module and an electric energy storage module which are sequentially connected. The third-stage hydrogen pressure reduction module is communicated with the hydrogen output pipeline; a first hydrogen pressure regulation transmission pipeline is also communicated between the primary hydrogen pressure reduction module and the hydrogen output pipeline; the second-stage hydrogen pressure reduction module is communicated with the hydrogen output pipeline through a second hydrogen pressure regulation transmission pipeline; through the cooperation of the multi-stage hydrogen pressure reduction module and the electric energy storage module, the pressure energy of high-pressure hydrogen in the high-pressure hydrogen storage tank is converted into electrochemical energy to the maximum extent, and the electrochemical energy is stored in the storage battery, so that the waste of the pressure energy in the high-pressure hydrogen storage tank is avoided, and the energy utilization efficiency of the fuel cell automobile is improved; and the comprehensive energy consumption of the automobile is reduced.

The invention discloses a metal material hydrogen compatibility simulation test method based on hydrogen content. The method comprises the following steps: S1, sample preparation; s2, charging hydrogen in a high-pressure hydrogen environment; s3, diffusible hydrogen is measured; s4, preparing an electrochemical hydrogen charging solution; s5, carrying out hydrogen charging by using an electrochemical hydrogen charging solution; s6, storing the sample; s7, drawing a hydrogen concentration change curve; s8, electrogalvanizing process parameters are set; s9, performing hydrogen charging in a simulated high-pressure hydrogen environment; s10, the sample is galvanized; s11, carrying out a slow tensile test and a fracture toughness test on the sample; and S12, evaluating the high-pressure hydrogen embrittlement of the sample based on the results of the slow tensile test and the fracture toughness test. According to the method, the hydrogen embrittlement performance of the material under different hydrogen pressure environments can be obtained, and the influence of the influence factors on the high-pressure hydrogen embrittlement performance of the steel can be analyzed in combination with the process, alloy components and stress states of the steel.

The utility model discloses a hydrogenation ball valve with a self-locking function, which belongs to the technical field of valves, and comprises a valve body, a valve core, a valve cover, a filling pressure detection self-locking mechanism, a valve rod and a valve cover positioning mechanism, the upper end of the valve element is connected with a valve rod used for enabling the valve element to rotate to open and close the ball valve. The valve body is provided with a filling pressure detection self-locking mechanism used for locking the ball valve when the hydrogen pressure of the hydrogen inlet end is larger than the safety range. And a valve cover positioning mechanism for positioning and locking the valve cover is mounted on the outer side wall of the valve body. By means of the mode, when the hydrogen pressure on the hydrogen inlet side is too large and a hydrogen pipe on the hydrogen outlet side is damaged, the valve element can be locked, and the ball valve cannot be communicated; and when the valve cover is mounted, bolts of the flange on the valve cover do not need to be symmetrically screwed one by one through the valve cover positioning mechanism and are screwed in sequence, so that the time of an operator is saved.

The invention discloses a double-phase TiFe-based hydrogen storage alloy material activated at room temperature and a preparation method thereof, and the method comprises the following steps: (1) weighing raw materials according to a chemical general formula: Ti 1.0-1.1 Fe 1-x Mnx, the value range of x is more than or equal to 0.2 and less than or equal to 0.3; (2) smelting the raw materials weighed in the step (1) in an argon protective atmosphere by adopting a vacuum arc smelting furnace; (3) the smelted cast ingot is subjected to vacuum tube sealing and then is annealed in an annealing furnace, the temperature is increased to 1000-1050 DEG C at the speed of 4-5 DEG C / min, heat preservation is conducted for 24 h or above, and the cast ingot is cooled to the room temperature along with the furnace; and (4) performing room-temperature activation. The biphase TiFe-based hydrogen storage alloy material can be quickly activated under the conditions of normal temperature (25 DEG C) and low hydrogen pressure (less than or equal to 3MPa), and has excellent cycle stability.

The invention relates to the technical field of renewable energy sources, and discloses a renewable energy source-oriented water electrolysis hydrogen production control system and a power distribution method.The system comprises a monitoring unit, a hydrogen pressure monitor, a processing center, an execution terminal and a communication network; renewable energy consumption rate and electrolytic cell power change rate are improved, minute-level fluctuation is adapted, power distribution errors are stably controlled, hydrogen production efficiency loss is avoided, the utilization rate of the electrolytic cell is increased by improving a dynamic priority model, the overall energy efficiency of a cluster is improved, starting and stopping frequency of a basic load group is reduced by a grouping control strategy, and the service life of the electrolytic cell is prolonged. Standby energy consumption is reduced through a sleep wake-up mechanism, the standby power consumption of the system is reduced to rated power, the hydrogen pressure overrun accident rate is reduced through a safety constraint mechanism, and thermal stress damage of the electrolytic cell is reduced and the fault shutdown rate is reduced through temperature deviation protection.

The invention discloses a control method and equipment for a hydrogen subsystem of a fuel cell and a storage medium, and relates to the field of hydrogen fuel application. The method comprises the following steps: estimating a system state of the hydrogen subsystem according to a model of the hydrogen subsystem and actual measurement information of the hydrogen subsystem; predicting future output of the hydrogen subsystem according to the model of the hydrogen subsystem and the system state of the hydrogen subsystem; according to the designed performance indexes and future output of the hydrogen subsystem, the rotating speed of a hydrogen circulating pump and the opening degree of a proportional valve are determined, and feedforward compensation is conducted on the determined rotating speed of the hydrogen circulating pump. According to the invention, multi-input and multi-output control from hydrogen pressure feedback and hydrogen in-and-out reactor pressure difference feedback to target hydrogen pressure and target hydrogen in-and-out reactor pressure difference can be realized, so that the control precision is remarkably improved.

The invention belongs to the technical field of PEM electrolytic cells, and particularly relates to a PEM electrolytic cell electrochemical performance detection device which comprises an electrolytic cell, a first test mechanism and a second test mechanism. The electrolytic bath comprises a base body, a hydrogen discharge pipe, a tee joint and a hydrogen storage tank connecting pipeline; the hydrogen discharging pipe is arranged on the base body, one end of the hydrogen discharging pipe is communicated with the tee joint, one opening of the tee joint is connected with the hydrogen storage tank connecting pipeline, the other opening of the tee joint is connected with the first testing mechanism, and the first testing mechanism is connected with the second testing mechanism; the first testing mechanism is used for testing the air pressure in the hydrogen storage tank connecting pipeline; and the second testing mechanism is used for testing the water content of the hydrogen. The first test mechanism and the second test mechanism are sequentially arranged on the hydrogen discharge passage of the electrolytic bath, so that the centralized detection of the hydrogen pressure and the water content is realized, and the problem of complex structure caused by multi-point arrangement of detection devices is avoided.

The present invention belongs to the field of hydrogen transportation, and specifically relates to a flexible hydrogen transmission pipe, a preparation method thereof, and a hydrogen leakage detection system. The flexible hydrogen transmission pipe provided by the present invention adopts a structure mainly made of non-metallic materials, which fundamentally solves the problem of hydrogen embrittlement and improves the safety and reliability of the hydrogen transmission pipe during long-term use. In the present invention, the internal pressure-bearing layer is reinforced with high-strength fibers, which can withstand high internal hydrogen pressure after weaving, ensuring the structural integrity of the pipeline under high-pressure transmission conditions; at the same time, the internal pressure-bearing layer is composited with optical fibers, which can monitor the status of the pipeline to prevent damage by a third party. The optical fiber monitoring system can accurately locate the position of the pipeline in real time and conduct all-round monitoring of the pipeline status, promptly discover potential safety hazards, provide maintenance personnel with accurate fault information, facilitate timely maintenance measures, and reduce accident risks and maintenance costs.

The invention relates to a Ti-Fe-Ce-Mn-Zr-Al-Co-based hydrogen storage alloy and a preparation method thereof, belongs to the technical field of hydrogen storage alloy materials, and solves at least one of the problems of high activation condition, long activation period, poor hydrogen absorption and desorption performance and the like of the traditional TiFe hydrogen storage alloy in the prior art. The invention provides a Ti-Fe-Ce-Mn-Zr-Al-Co-based hydrogen storage alloy which is characterized in that the specific composition of the alloy is Ti < 1.05 > Ce < 0.05 > Fe < 1.15-x-y-z-m > Mn < x > Zr < y > Al < z > Com, x, y, z and m are atomic ratios, x is larger than or equal to 0.1 and smaller than or equal to 0.25, y is larger than or equal to 0.05 and smaller than or equal to 0.2, z is larger than or equal to 0.02 and smaller than or equal to 0.1, and m is larger than or equal to 0.02 and smaller than or equal to 0.1. The hydrogen storage alloy has good activation performance and hydrogen absorption and desorption performance, the hydrogen storage capacity is larger than or equal to 1.70 wt.%, the hydrogen absorption plateau pressure is larger than or equal to 0.41 MPa, and the hydrogen desorption plateau pressure is larger than or equal to 0.31 MPa; activation can be completed at a time under the conditions that the temperature is 30 DEG C and the initial hydrogen pressure is 3 MPa, and the solid hydrogen storage material can be widely applied to hydrogen fuel cells and other scenes as a solid hydrogen storage material.

The invention discloses a hydrogen compatibility simulation test method in a high-pressure environment based on hydrogen diffusion. The method comprises the following steps: S1, preparing a sample; s2, performing a hydrogen permeation test in a high-pressure hydrogen environment; s3, preparing a hydrogen permeation cathode hydrogen filling solution; s4, performing a hydrogen permeation test in a simulated high-pressure hydrogen environment; s5, applying and adjusting cathode hydrogen charging current under simulated high-pressure hydrogen permeation; s6, determining a dynamic hydrogen charging current; s7, performing a smooth slow tensile simulation test in a high-pressure hydrogen environment; s8, carrying out a notch slow tensile simulation test in a high-pressure hydrogen environment; s9, carrying out a fracture toughness test; and S10, performing high-pressure hydrogen embrittlement evaluation based on the results of the smooth slow tensile simulation test and the fracture toughness test. According to the method, the hydrogen embrittlement performance of the material under different hydrogen pressure environments can be obtained, and the influence of the influence factors on the high-pressure hydrogen embrittlement performance of the steel can be analyzed in combination with the process, alloy components and stress states of the steel.

The invention provides a quantitative detection method for the average pressure of hydrogen in a PEM electrolyzed water cathode catalyst layer, and relates to the technical field of hydrogen production by electrolyzed water. The quantitative detection method comprises the following steps: carrying out a hydrolysis reaction in a PEM electrolytic cell, and calculating a hydrogen permeation flux N1 and a corresponding back pressure P1 under an electrolysis working condition; in another PEM electrolytic cell with the same structure, hydrogen is introduced into the cathode side, back pressure is applied to a cathode opening, meanwhile, inert gas is introduced into the anode side, an anode product channel is continuously purged, and the hydrogen permeation flux N2 under the hydrogen introduction working condition is calculated; gradually adjusting the back pressure under the hydrogen feeding working condition, repeating the step of testing the permeation flux under the hydrogen feeding working condition to obtain the hydrogen permeation flux under different back pressures, and drawing an N2-P2 curve; and determining a corresponding hydrogen back pressure value P2 when N1 is equal to N2, and calculating according to a formula deltaP = P2-P1 to obtain the average hydrogen pressure deltaP.

The invention discloses a PID control apparatus and method of a fuel cell system. The PID control device comprises a hydrogen pressure sensing unit which collects an actual hydrogen pressure value at an outlet of a hydrogen proportional valve arranged between the hydrogen supply device and the fuel cell stack and generates a collected value representing the actual hydrogen pressure value; the PID controller is used for carrying out a preset PID control algorithm on a hydrogen pressure deviation value between the acquisition value and target hydrogen pressure of the fuel cell system, the variable quantity of the hydrogen pressure deviation value and the cumulant of the hydrogen pressure deviation value so as to obtain a coefficient of the PID controller; and calculating a control amount for the opening degree of the hydrogen proportional valve according to the coefficient.

Provided is an alkane production method wherein a continuous reaction of an alcohol and hydrogen proceeds at a low reaction pressure, carbon reduction from the alcohol can be suppressed, and the conversion rate is excellent. This alkane production method for producing an alkane from a C8-22 alcohol comprises a step in which the alcohol and hydrogen are continuously reacted under the following conditions. (i) The reaction is carried out in the presence of a zeolite carrier supporting palladium, the reaction temperature is 180°C or higher, and the hydrogen pressure is 0 MPa to 0.7 MPa in terms of gauge pressure. (ii) The space velocity (SV) of the hydrogen relative to the volume of a catalyst in which the palladium is supported on the zeolite carrier is 1200 h–1 to 2400 h–1. (iii) The space velocity (SV) of the alcohol relative to the volume of the catalyst in which the palladium is supported on the zeolite carrier is 8 h–1. (iv) The zeolite carrier is of an H-beta type or an H-ZSM-5 type, has a molar ratio (SiO2 / AL2O3) between silica (SiO2) and alumina (AL2O3) of 23 to 27, and has a palladium support quantity of 0.1 mass% to 5 mass%.