150results about How to "Reduce the cost of hydrogen production" patented technology

The invention discloses a high-efficiency multi-element transition metal phosphide hydrogen-evolution catalyst and a preparation method thereof. The catalyst is Co<x>Fe<y>P and is formed by being loaded in carbon cloth by a hydrothermal method. The preparation method of the catalyst comprises the following steps of preparing a precursor by the hydrothermal method, adding a certain amount of a mixture of Co(NO<3>)<2>.6H<2>O and Fe(NO<3>)<3>.9H<2>O into deionized water to form an uniform mixed solution, placing the mixed solution in a reaction kettle, adding carbon cloth (CC) as a carrier, uniformly adding strong ammonia water, hermetically heating the mixed solution to 110-120 DEG C, carrying out heat preservation for 9-10 hours, taking out the CC, and drying the CC to obtain the precursor; and carrying out low-temperature phosphorization on the precursor, separately placing NaH<2>PO<2> and the precursor in an upstream and a downstream of a tube furnace, introducing nitrogen or inert gas, heating the tube furnace to 300-350 DEG C, and carrying out heat preservation for over 2 hours to obtain the hydrogen-evolution catalyst. Compared with the prior art, the hydrogen-evolution catalyst prepared according to the method is endowed with high-efficiency and stable catalytic hydrogen evolution capability in an acidic solution, and the hydrogen production cost through electrolysis of water can be reduced.

The invention discloses a metal oxide nano sheet supported carbon coated metal particle electrolysed water catalyst which is prepared from the following steps: (1) dissolving a metal precursor A in asolvent to prepare a solution A, dissolving a metal precursor B in a solvent to prepare a solution B, mixing the solution A with the solution B, adding a substrate material, ultrasonically stirring the mixture to obtain a mixed suspension liquid, adding the mixed suspension liquid into a reaction kettle for a solvothermal reaction, cooling the reactant after the reaction to room temperature, taking out a material in the reaction kettle, and filtering, cleaning and vacuum drying the material to obtain an initial sample; and (2) introducing mixed gas of hydrogen and inert gas, and carrying out high-temperature calcining to obtain a final product. The product prepared by the method has relatively good electrolysed water catalytic activity and electrochemical stability, and the overpotential of the electrolysed water in the whole electrolytic cell is smaller than or equal to 1.48 V, thereby laying a technical foundation for lowering hydrogen making cost.

The invention relates to a method of producing hydrogen and nitrogen by catalytic cracking regenerator gas. The invention has main content that: the high temperature oxygen-contained gas of a second regenerator enters to the bottom of a first regenerator, and is contacted, heated and burnt with a mixing catalyst composed of a carbon deposition catalyst in a self stripper and a regenerant in the second regenerator. The regenerating gas on the upper part of the first regenerator is separated from a half-regenerant by a cyclone separator. The generating gas enters into a pressure energy recovery system, and then enters into the subsequent hydrogen and nitrogen producing process. The half-regenerant enters into the second regenerator through a dipleg, and then is contacted and burnt with full burnt prevailing wind. The stripped carbon deposition catalyst backs into the first regenerator, and then a circulating is formed, in order to effectively use CO and CO₂ in the regenerating gas and CO₂ produced in the subsequent CO intermediate temperature changing process, and to improve the ratio of the carbon deposition on the first regenerator catalyst transferring into CO, and furthermore to improve the unit carbon deposition hydrogen yield rate of the catalyst.

The invention discloses a method for preparing hydrogen from straws, which comprises the following steps: carrying out aerobic degradation on straws by using a composite microbial inoculum capable of degrading straws; cattle manure pretreatment: screening the cattle manure with a 50-mesh screen to remove granular solids and impurities, boiling for 30-60 minutes, and centrifugating to remove excessive moisture for later use; preparation of straw anaerobic degradation culture medium: preparing a liquid anaerobic degradation culture medium, and adding the straws subjected to aerobic degradation; and adding the pretreated cattle manure into the straw anaerobic degradation culture medium, charging nitrogen into the container to remove oxygen, sealing, and culturing at 60-70 DEG C at the rate of 120 r/min in a dark place. The method optimally combines anaerobic degradation and anaerobic fermentation, has the advantages of short required time for hydrogen production, low cost, no need of adding enzymes in the fermentation process and cheap raw materials, and greatly saves the cost.

A hydrogen production method by steam reforming in a combined reactor and a device thereof belong to the technical field of a hydrogen production technology by steam reforming of light dydrocarbon. The device provided by the invention comprises a fixed-bed reactor and a half-cycle fluidized bed reactor. The method is realized by the use of the device, and natural gas or dry gas for oil refining or light oil is used as a raw material. The method comprises the following steps: reducing a nickel based catalyst, carrying out a catalytic reforming reaction in the fixed-bed reactor, carrying out a catalytic reforming reaction again as well as a carbon dioxide adsorption reaction in a riser reactor of the fluidized bed, carrying out gas-solid separation to prepare the hydrogen product, and regenerating and utilizing carbon dioxide adsorbent particles. The invention has characteristics of short process flow, simple operation, energy conservation, low production cost, high hydrogen production efficiency, high purity of the hydrogen product, complete utilization of resources, no environmental pollution and the like. The invention can be widely applied in hydrogen production by steam reforming. The hydrogen prepared by the adoption of the method can be extensively applied in the fields of petroleum, chemical industry, metallurgy and the like.

The invention provides a wind-fire coupling multi-energy system based on hydrogen energy. The system comprises a wind power generation system, a thermal power generation system, a water electrolysis hydrogen production system, a fuel cell system and a hydrogen storage device, wherein the wind power generation system is connected with the water electrolysis hydrogen production system, when the peakshaving capacity of the thermal power generation system reaches the lower limit, surplus electric energy is used for supplying power to the water electrolysis hydrogen production system, the water electrolysis hydrogen production system is used for preparing hydrogen, storing the hydrogen in the hydrogen storage device, feeding the hydrogen into a fuel cell when the total power generation power is smaller than a load demand, and transmitting the hydrogen to a user when the total power generation power meets the load demand, when the total power generation power is smaller than the load demand, the fuel cell works to compensate the power shortage, excessive electric energy generated by a wind generating set electrolyzes water to produce hydrogen, the fuel cell system assists in power generation, and the deep peak regulation limit and economy of a thermal generator set are improved.

The invention discloses a hydrogen preparing method of hydrolytic slag catalyzing gasification of cellulose waste, which is characterized by the following: adopting biological acid hydrolytic or enzyme hydrolytic waste as raw material; using catalyzing gasification method; preparing hydrogen-rich synthetic gas under fitful reacting temperature, pressure and time.

The invention discloses a water electrolysis produced gas pressure self-balancing device and an application thereof, and relates to the field of gas pressure self-balancing devices. The device comprises an electrolysis unit, the electrolysis unit comprises a first cathode, a common anode and a second cathode; the common anode is arranged between the first cathode and the second cathode, two side faces of the common anode are opposite to the first cathode and the second cathode respectively, the first cathode and the second cathode are connected in parallel and used for being connected with a negative electrode of an external power supply respectively, and the common anode is used for being connected with a positive electrode of the external power supply. An electrolysis unit without pressure difference can be formed; a special pressure balance part or system does not need to be additionally arranged; the complexity of an electrolysis system is effectively reduced, the cost is reduced,popularization and application of a water electrolysis hydrogen production and oxygen production technology are facilitated, particularly application to alkaline water electrolysis hydrogen productionand oxygen production can be achieved easily, water hydrolysis under a high pressure can be realized easily, the gas production pressure can also be remarkably improved, and the gas production efficiency is greatly improved.

The invention discloses a methanol-water fuel reforming hydrogen production system. The system comprises a methanol-water fuel feeding pipe, an evaporator, a modifier, a CO oxidation removal device and a hydrogen-rich mixed gas conveying pipe which are connected in sequence. The CO oxidation removal device comprises an LTS catalytic oxidizer and a PROX catalytic oxidizer, a copper-zinc-based catalyst is arranged in the LTS catalytic oxidizer, and a ruthenium-based catalyst is arranged in the PROX catalytic oxidizer. The hydrogen-rich mixed gas is subjected to staged oxidation treatment throughthe LTS catalytic oxidizer and the PROX catalytic oxidizer, so that the CO concentration in the gas is gradually reduced to guarantee that CO is completely removed. According to the system, the conversion rate of methanol can reach 100%, CO in the reformed mixed gas can be completely removed, the starting time of the system is short, the reforming hydrogen production condition can be rapidly achieved, energy consumption is low, the hydrogen production speed is high, the hydrogen production cost is low, the energy conversion efficiency is high, environmental protection and energy conservationare achieved, and the power generation efficiency is high after the system is in butt joint with a fuel cell stack.

A system and method for comprehensive utilization of boiler sulfur-containing flue gas and fly ash are characterized in that a boiler flue outlet is connected to a Benzoic reaction device, the Benzoic reaction device is connected with a water supply device, a reactor exhaust device, an inlet of a sulfuric acid collection device and a hydrogen iodide decomposition device, the hydrogen iodide decomposition device is connected with an iodine recovery device, a hydrogen collection device, and a fourth inlet of the Benzoic reaction device, the iodine recovery device is connected with the iodine supply device, and an outlet of the iodine recovery device is connected with the Benzoic reaction device; the sulfuric acid collection device is connected with the aluminum sulfate preparation device, the aluminum sulfate preparation device is connected with an outlet of the boiler fly ash system and an inlet of the aluminum sulfate treatment device, and an outlet of the aluminum sulfate treatment device is connected with inlets of the aluminum sulfate storage device and the silicon dioxide treatment and storage device; and based on the system, sulfuric acid generated in the hydrogen production process is used for absorbing disulfur trioxide in the fly ash, meanwhile, silicon dioxide with high purity can be generated, aluminum sulfate and silicon dioxide with high additional value are formed, and waste substances are recycled.

The invention relates to a hydrogen storing and producing technology, in particular to a system and method for producing hydrogen by controllably hydrolyzing sodium borohydride/aluminum powder mixed solid fuel. The system for producing hydrogen consists of solid fuel and liquid fuel, wherein the solid fuel is a mixture of sodium borohydride, aluminum powder and alkali; and the liquid fuel is a transition metal saline solution. In the method for producing hydrogen, the liquid fuel is taken as a hydrogen-producing reaction control preparation and is added into the solid fuel in a controlling manner, so that the immediate controllable hydrogen production can be realized according to the requirement. According to the system and method for producing hydrogen by hydrolyzing the mixed solid fuel, which are provided by the invention, the problems that the hydrogen production efficiency is low, the hydrogen production cost is high, and the like in the prior art can be solved; and the system and method have the advantages of high hydrogen production efficiency, favorable reaction controllability, high fuel conversion rate, simplicity and convenience in operation, relatively-low hydrogen production cost, and the like and can provide a moving hydrogen source for hydrogen combustion vehicles and various military and civil mobile and portable power supplies.

The invention discloses binary and ternary transition metal hydrides, a preparation method and an application of the binary and ternary transition metal hydrides as an efficient and stable electro-catalytic hydrogen evolution catalyst. The catalyst has the molecular formula being HxMaRbYcO3, wherein M, R and Y are two or three different transition metals, the value of x ranges from 0.01 to 1, and the sum of a, b and c is equal to 1. M, R and Y are any two or three elements of scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, zirconium, niobium, molybdenum, rhodium, osmium, tungsten, tantalum and iridium. HxMaRbYcO3 as a water electrolysis catalyst has electrochemical performance in an acidic electrolyte equivalent to the performance of a commercial carbon-supported platinum catalyst, has very high stability and is prepared with a simple preparation process and easy to amplify. Therefore, HxMaRbYcO3 can serve as a substitute of the carbon-supported platinum catalyst, and the hydrogen production cost is effectively reduced.

The invention relates to an iron alkali composite catalyst for direct liquefaction of coal. The catalyst can be a loaded type or a mixed type. The loaded catalyst is prepared by loading an iron active component and an alkali active component on the surface of coal particles through chemical reactions. The mass ratio of water to dry coal powder is (0.5-5):1. The mass ratio of iron atoms in the iron salt solution to dry coal powder is (0.1-0.5):1. The mole ratio of additive to iron atoms in the iron salt solution is (0-0.1):1. The mole ration of alkaline metal atoms in the alkali solution to iron atoms in the iron salt solution is (0.001-5):1. The mixed type catalyst is prepared by directly mixing iron containing substances and alkali containing substances, wherein the mole ratio of alkaline metal atoms to iron atoms is (0.001-5):1. The catalyst is suitable for direct liquefaction of coals in different systems and is capable of prominently improving the coal conversion rate and yield of oil. Moreover, the raw materials are cheap and easily available. The preparation is simple. The catalyst has a very good application prospect.

The invention provides a method for preparing hydrogen by reforming alcohol through galvano chemistry and a device thereof. The method comprises: the mixed liquid of alcohol and water enters into an anode chamber in a reforming groove through a circulation pump; DC voltage is applied between anode and cathode of the reforming groove, the alcohol and the water are reformed through galvano chemistry at the anode, and the water is restored to be hydrogen at the cathode to be precipitated. The device comprises a DC power supply, the mixed liquid of alcohol and water, a container used for storing the mixed liquid of alcohol and water, the anode chamber used for passing in and out of the mixed liquid of liquid alcohol and water, a cathode chamber used for storing water and a hydrogen collecting device connected with the cathode chamber; wherein, the anode chamber is separated from the cathode chamber by a solid anion conducting polymer film which is taken as electrolyte. By using the invention, the aqueous solution of alcohol enters into the reforming groove through the circulation pump, the alcohol and the water are reformed through galvano chemistry at the anode when being applied with certain DC voltage, and the water is restored to be hydrogen at the cathode to be separated out. The invention can be used for preparing hydrogen under the conditions of low voltage, cost and energy consumption.

The invention belongs to the field of hydrogen production, and discloses a hydrogen production method. The method comprises the following steps: iron powder is in contact with oxygen-bearing vapor, the vapor in the oxygen-bearing vapor reacts with the iron powder, so that ferroferric oxide and hydrogen are produced; meanwhile, the oxygen in the oxygen-bearing vapor reacts with the iron powder, sothat iron oxide is produced and heat is released, and the released heat is provided for the reaction between the vapor and the iron powder, so that the vapor and the iron powder continue to react. Theiron powder as a main raw material for the hydrogen production method provided by the invention is cheap, not a hazardous article, easy to store, pressure-free and pollution-free; the whole production and reaction process is almost pollution-free and emission-free, and does not consume electricity; the volumetric ratio of the materials to hydrogen output is high, and 3000 cubic meters of hydrogencan be produced per cubic meter of iron powder; the hydrogen production cost is low, and after ferroferric oxide as a byproduct is recovered, the cost of per cubic meter of hydrogen is less than 0.5yuan; the process is simple, complex equipment, such as a compressor, is not needed, investment is savereduced, the hydrogen production method is easy and convenient to operate, and therefore the hydrogen production method can be widely applied into AIP (Air Independent Propulsion) submarines and the industrial field.

The invention discloses a nano-mesoporous oxygen carrier. The oxygen carrier comprises, by mass, 20-50 parts of montmorillonite, 5-10 parts of TiO2, 5-10 parts of NiO, 5-10 parts of CeO2 and 10-20 parts of CaO. The invention also discloses a preparation method of the oxygen carrier. Multibasic oxide is compounded based on the nanolayer structure of natural montmorillonite, so the oxygen carrier is nano-mesoporous, and cheap large-scale industrial application is reached. Methane and water vapor enter the mesoporous structure prosperous in the surface of the oxygen carrier, the methane, water and the oxygen carrier undergo a surface redox reforming hydrogen production reaction, CO2 is adsorbed in situ, the endothermic reaction and the exothermic reaction are coupled in the hydrogen production process, and highly pure hydrogen is prepared in a high-efficiency and energy-saving manner. The preparation method has the advantages of simplicity, controllability and very low cost. The nano-mesoporous oxygen carrier improves the catalysis performance and the thermal stability of the oxygen carrier, and is friendly to environment.

The invention discloses a combined system and method for processing oil gas generated by pyrolysis of low rank coal. The system comprises a quench cooler, a normal pressure distillation column, a suspended bed hydrogenation reactor, a gas-liquid separator, a vacuum distillation tower, a residuum gasifying device, a gas separation and purification device, and a glycol synthesis system. The method comprises the following steps: quenching pyrolysis oil gas to generate cooled oil gas; subjecting cooled oil gas to normal pressure distillation to obtain heavy oil in the bottom of a distillation column and light fuel; cracking the heavy oil, separating gas and liquid to obtained cracked oil; subjecting cracked oil to vacuum distillation to obtain residual oil; gasifying the residual oil to obtain syngas; separating and purifying syngas to obtain hydrogen and carbon monoxide; and synthesizing carbon monoxide and hydrogen to obtain glycol. After vacuum deep extraction, the heavy residual oil is not returned to the suspended bed hydrogenation reactor, and thus the coking during the hydrogenation process in the suspended bed is avoided. The gas prepared from residual oil is used to produce glycol, the flexibility of heavy component processing is improved, and the economy of the technology is increased.

The invention belongs to the field of offshore wind power, and particularly relates to a seawater hydrogen production conveying system and method based on an existing offshore wind power plant. The system comprises a wind driven generator, a seawater electrolytic tank device and a hydrogen conveying unit, wherein the wind driven generator is used for converting wind energy to electric energy, theseawater electrolytic tank device is used for electrolyzing seawater by utilizing electric energy supplied by the wind driven generator, and the hydrogen conveying unit is used for conveying hydrogenprepared by the seawater electrolytic tank device to the land. According to the seawater hydrogen production conveying system and method based on the existing offshore wind power plant, offshore windpower and seawater hydrogen production are combined, the resource advantages of an offshore wind power plant are fully utilized, the seawater hydrogen production cost is reduced, and finally coordinated development of offshore green wind energy and seawater hydrogen production is achieved.