2226results about "Ammonia preparation/separation" patented technology

The invention provides a wind-solar hydrogen production and ammonia synthesis system and a configuration method thereof, electronic equipment and a storage medium. The wind and light hydrogen production and ammonia synthesis system comprises a wind and light hydrogen production subsystem, an ammonia synthesis subsystem and a coordination controller which are relatively independent, the ammonia synthesis subsystem comprises a hydrogen storage tank, the hydrogen storage tank is connected with the wind and light hydrogen production subsystem, and the configuration method of the wind and light hydrogen production and ammonia synthesis system can be executed by the coordination controller. The configuration method of the wind-solar hydrogen production ammonia synthesis system comprises the following steps: firstly, determining capacity configuration parameters of a wind-solar hydrogen production subsystem by taking the minimum leveling hydrogen production cost as a target; and determining the capacity configuration parameters of the ammonia synthesis subsystem based on the capacity configuration parameters of the wind-solar hydrogen production subsystem by taking the maximization of the wind-solar absorption rate, the minimization of the total cost of the system and the minimization of the operation cost of the system as targets. The wind and light hydrogen production subsystem and the ammonia synthesis subsystem are subjected to two-stage decoupling type system configuration, and stable operation of the ammonia synthesis process is ensured while efficient utilization of green electricity is achieved.

The invention provides a marine ranch breeding and zero-carbon comprehensive energy system based on marine energy. The marine ranch breeding and zero-carbon comprehensive energy system specifically comprises a floating platform module, a marine ranch module, a marine renewable energy power module, a wind power-hydrogen ammonia conversion module, an intelligent control module, a marine transportation system and a consumption terminal. Functional fusion of offshore energy and marine ranching is achieved, the sea area intensive utilization rate, the sea area resource development efficiency and the marine resource development technology level are effectively improved through the wind-fishery-hydrogen-ammonia fusion development mode, the marine resource development cost is effectively reduced, advantage complementation is formed, commercial state fusion is achieved, and the development cost is reduced. And the intelligent control module can realize energy collaboration of the offshore energy, so that the utilization rate of the power generation output power of the offshore renewable energy power module is improved while the operation of the power grid is stabilized, and the wind power-hydrogen ammonia conversion efficiency is improved.

The flexible ammonia synthesis process comprises the following steps: raw material gas is preheated and heated, then enters a temperature-controlled ammonia synthesis tower and reacts under the action of a catalyst, the reacted gas is subjected to heat energy recovery through an outlet waste heat boiler and then enters an ammonia separation tank after being subjected to multi-stage cooling, and a liquid ammonia product is obtained at the bottom; the top non-condensable gas is pressurized by a circulating compressor and then returns to an inlet of the temperature control ammonia synthesis tower; in the temperature-controlled ammonia synthesis tower, raw material gas enters the tower through a raw material gas inlet and sequentially penetrates through the distribution plate, the catalyst bed I section, the distribution plate and the catalyst bed I section from outside to inside in the radial direction, reaction is carried out while heat exchange is carried out, and reaction gas is led out from a reaction gas outlet in the bottom after being converged in the center. The method is simple in process, easy to control, low in equipment investment and operation cost, energy-saving, consumption-reducing, high in reaction efficiency and loose in reaction condition, temperature runaway or temperature loss of a bed layer is not easily caused under high load, and stable operation of the system can still be kept under 0-120% fluctuation of feed gas flow.

The invention relates to a method for synthesizing a high-value product by using refinery furnace gas, which comprises the following steps: purifying refinery crude furnace gas, feeding the purified refinery crude furnace gas into a chemical looping three-stage normal-pressure reactor, respectively obtaining near-pure carbon dioxide, nitrogen and hydrogen products in each stage of flow, and adjusting a gas framework by using the near-pure hydrogen product obtained by reforming coke oven gas as a supplementary hydrogen source, after reaching the standard of the mixed raw material, pressurizing and feeding into a synthesizer, and carrying out gas-liquid separation to obtain a methanol or ammonia product. The method solves the problem that carbon dioxide and nitrogen cannot be utilized when the traditional refinery furnace gas replaces coal-based carbon monoxide to synthesize high-value products through chemical carbonylation; part of coke oven process tail end product coke oven gas is consumed, and the defect that a cheap hydrogen source needs to be supplemented due to unmatched raw material structures in the technological process is overcome; and the tail gas and low-grade heat recycling process in each stage of production process is also optimized, and near-zero emission in the life cycle and gradient utilization of chemical energy are realized.

The invention discloses an electricity ammonia heat multi-energy conversion system adapting to offshore wind power fluctuation and a control method of the electricity ammonia heat multi-energy conversion system. The electric ammonia heat multi-energy conversion system comprises a green hydrogen preparation system, a green ammonia synthesis system, a green ammonia power generation system and a green ammonia heat supply system, the electric ammonia heat multi-energy conversion system is controlled by adopting the wind power absorption module and the power generation heat supply module. According to the invention, offshore wind power is utilized to prepare green hydrogen and synthesize green ammonia, offshore new energy consumption and medium-and-long-term storage of electric power are realized, low-cost long-distance flexible transportation of energy is realized through a liquid ammonia mode, the problem of storage and transportation of hydrogen energy is solved, and the construction investment of offshore transmission channels is reduced; energy supply diversification can be achieved through green ammonia power generation and green ammonia heat supply; meanwhile, through the unique control method, the method can effectively adapt to the strong volatility of offshore wind power, and economical and efficient preparation and diversified utilization of the green ammonia are achieved.

The present invention provides a method for treating electrolytic manganese slag. The method comprises the following steps: sealing and stirring the electrolytic manganese slag and a modifier, and vacuuming to obtain modified manganese slag and a first flue gas, wherein the first flue gas is used to prepare an ammonia solution; mixing the modified manganese slag with a flux for oxidation smelting to obtain a first slag and a second flue gas, wherein the second flue gas is used to prepare concentrated sulfuric acid; mixing the first slag with a reducing agent and a regulator for reduction smelting to obtain a second slag, a third flue gas and a reduced metal liquid, adding a desulfurization and phosphorus agent to the reduced metal liquid for desulfurization and phosphorus removal to obtain a desulfurized phosphorus metal liquid; quenching and solidifying the second slag to obtain glass slag, and mixing the glass slag with an activator for grinding to obtain active micropowder. The present invention can synergistically treat a variety of sulfur-containing multi-metal solid wastes in electrolytic manganese slag, fully recover ammonia, sulfur and valuable metal resources in manganese slag, and realize the comprehensive utilization of all solid wastes in the whole process, with great social and economic benefits.

The invention discloses a urea hydrolysis pollution discharge period and pollution discharge quantity control system and method, and belongs to the technical field of power plant wastewater. The system comprises a pollution discharge unit, a surface pollution discharge unit and a bypass circulation unit, the blowdown unit comprises a blowdown main valve and a blowdown secondary valve; the bypass circulation unit comprises a bypass circulation primary valve, a bypass circulation secondary valve, a bypass blow-down valve and an online analysis device; one end of the blow-down main valve is connected with the urea hydrolysis reactor, the other end of the blow-down main valve is connected with one end of the blow-down secondary valve, and the other end of the blow-down secondary valve is connected with the wastewater pool; one end of the bypass circulation primary valve is arranged between the blow-down main valve and the blow-down secondary valve, and the other end of the bypass circulation primary valve is connected with one end of the bypass circulation secondary valve. Through real-time sampling of the solution and real-time analysis of ions in the solution, the urea hydrolysis pollution discharge period and the pollution discharge amount are controlled, pollution discharge of the hydrolyzer is carried out at proper time and proper amount, normal operation of the hydrolyzer is guaranteed, and waste of the urea solution is avoided.

The utility model provides a compound device for providing feed gas for preparing green ammonia from new energy and a green ammonia synthesis system. The composite device comprises a deep cooling air separation nitrogen generation subsystem, a hydrogen supply subsystem and a main heat exchanger, and the hydrogen supply subsystem comprises a water electrolysis hydrogen generation unit, a first hydrogen compressor, a second hydrogen compressor, a hydrogen storage tank and a hydrogen conveying pipeline. The hydrogen conveying pipeline comprises a first hydrogen conveying pipeline, a second hydrogen conveying pipeline and a third hydrogen conveying pipeline; the main heat exchanger is a multi-channel heat exchanger and comprises a first flowing channel used for flowing of a first medium and a second flowing channel used for flowing of a second medium, the second hydrogen compressor is connected with the hydrogen storage tank through the first flowing channel, and the hydrogen storage tank is connected with the third hydrogen conveying pipeline through the second flowing channel. The composite device provided by the utility model can ensure the supply stability of the raw material hydrogen of the ammonia production subsystem, and solves the technical problem that the hydrogen supply is unstable in the existing green ammonia synthesis process.

The invention relates to the technical field of industrial waste gas treatment, and discloses an acid gas treatment device and method for synthesis ammonia production, the acid gas treatment device for synthesis ammonia production comprises an absorption tower, a spraying system and a filler layer, the spraying system and the filler layer are installed in the absorption tower, and a receiving disc is arranged below the filler layer; the receiving disc comprises a plurality of annular plates which are vertically and coaxially distributed, the diameters of the annular plates are gradually reduced from top to bottom, the bottom of the annular plate on the lowermost side is fixedly connected with a drainage ring, the outer wall of the lower portion of the drainage ring is sleeved with a collecting cylinder, the inner wall of the drainage ring is fixedly connected with a flow slowing cylinder, and the lower portion of the flow slowing cylinder extends into the collecting cylinder. The solvent flows on the annular plate, and after the flow speed of the solvent is slowed down through the flow slowing cylinder, the solvent and impurities form a falling speed difference in the collecting cylinder, so that the impurities can effectively precipitate at the bottom in the collecting cylinder and are prevented from flowing to a filtering system of the recycling box along with the solvent, the burden of the filtering system is relieved, and the recycling efficiency of the solvent is improved.

The invention relates to the technical field of ship engine tail gas treatment, and discloses a denitration system and a denitration method for ammonia fuel engine tail gas. The denitration system comprises an ammonia fuel engine and a denitration device, the liquid ammonia fuel supply device is connected with the ammonia fuel engine through a supply pipeline and is used for supplying ammonia fuel to the ammonia fuel engine; a gas inlet of the ammonia gas buffer tank is connected with the supply pipeline, and the ammonia gas buffer tank is used for collecting unburned ammonia gas generated in the supply pipeline; the ammonia water preparation device is connected with a gas outlet of the ammonia gas buffer tank; and the tail gas denitration device is connected with an outlet of the ammonia water preparation device and an exhaust port of the ammonia fuel engine. The ammonia water is prepared from the unburned ammonia gas, and the prepared ammonia water is used for subsequent reduction of nitrogen oxides in tail gas of an ammonia fuel engine, so that the treatment problem of the unburned ammonia gas can be solved, and meanwhile, the consumption of a reducing agent is reduced. In addition, the ammonia water can replace part of the reducing agent, so that the storage amount of the reducing agent can be reduced, and the ship space occupied by the reducing agent is reduced.

The invention provides a comprehensive energy system optimization scheduling method considering flexible regulation and control of storage and transportation hydrogen, and belongs to the field of power system scheduling. The method comprises the following steps: constructing a hydrogen fuel cell power generation model and a hydrogen storage system and electric energy storage coordinated operation model in a hydrogen production park in an off-grid mode by utilizing water electrolysis hydrogen production of new energy output; establishing a supply-demand relation model including the hydrogen production park, the hydrogen energy demand customer and the charging station based on the hydrogen energy transportation scheduling platform of the hydrogen production park; the method comprises the following steps: constructing an electric hydrogen transport vehicle real-time variation model, an electric hydrogen transport vehicle path planning model, a hydrogen-electricity transfer model, a flexible hydrogen utilization model, and constructing a function which takes the lowest total operation cost of a hydrogen production park as an objective function, and based on flexible hydrogen energy production-storage-transport-utilization links, meeting new energy output fluctuation and ammonia production target capacity, and reducing wind and light abandoning. According to the method, the hydrogen transportation cost of the hydrogen production park in the isolated network operation mode is reduced, and the schedulable potential of the hydrogen production park is improved.

The invention discloses an actinide-graphdiyne aerogel composite material as well as a preparation method and application thereof, and belongs to the technical field of catalyst materials. The actinide-graphdiyne aerogel composite material comprises actinide ions, iodide ions and graphdiyne aerogel, the graphdiyne aerogel is of a porous net structure, and the actinide ions and the iodide ions exist on the surface of the graphdiyne aerogel in the form of nanoclusters; and the actinide ions are selected from one of Th, Pa, U, Np, Pu and Am ions. The actinide-graphdiyne aerogel composite material can be used as a catalyst to realize efficient thermocatalytic ammonia production under mild conditions, the thermocatalytic ammonia production performance of the composite material can be regulated and controlled by changing a monomer structure for preparing graphdiyne aerogel, and even thermocatalytic ammonia production of the graphdiyne aerogel material is realized under the condition of no metal load; the catalyst is expected to become a new-generation high-performance thermocatalytic ammonia production catalyst.

The utility model discloses hydrogen purification equipment and an ammonia production system, and relates to the technical field of hydrogen purification, and the hydrogen purification equipment comprises an air separation device, a hydrogen production device, a heat exchange part and a filtering part; the air separation device is provided with a refrigerant discharge pipe; the hydrogen production device is provided with a hydrogen discharge pipe; the heat exchange part is provided with a refrigerant inlet end, a hydrogen inlet end and a hydrogen outlet end, the refrigerant discharge pipe is communicated with the refrigerant inlet end, the hydrogen discharge pipe is communicated with the hydrogen inlet end, and a refrigerant discharged by the refrigerant discharge pipe and hydrogen discharged by the hydrogen discharge pipe can be subjected to heat exchange; the filter is provided with an inlet end and an outlet end which are mutually communicated; the inlet end is communicated with the hydrogen outlet end; according to the technical scheme, the utilization rate of hydrogen is increased.

The invention relates to the technical field of chemical catalysts, in particular to a cerium-based solid solution loaded iron-based oxygen vacancy enhanced low-temperature ammonia synthesis catalyst. The heterovalent ions are doped in CeO2 crystal lattices to introduce strain and defects, so that the oxygen vacancy formation energy and concentration are greatly improved. Experiments show that the oxygen vacancy concentration (delta) of the Ce0. 8Zr0. 2O2-delta carrier disclosed by the invention can reach 0.12, which is 3-5 times that of pure CeO2. Under the conditions of 250 DEG C and 5 MPa, the ammonia synthesis rate reaches 120 [mu] mol / g / h, which is more than 20 times that of a traditional molten iron catalyst; under the conditions of 350 DEG C and 10 MPa, the ammonia synthesis rate exceeds 1000 [mu] mol / g / h and is close to the level of a noble metal ruthenium-based catalyst. As the working temperature is reduced by 100-150 DEG C, the reaction heat consumption is reduced by more than 30%, and the overall energy consumption is reduced by 25-40%.

The invention provides a preparation method and application of nitrogen-doped activated carbon for a ruthenium catalyst carrier, and the preparation method comprises the following steps: carrying out in-situ polymerization on aniline on the surface of nanocellulose by adopting an oxidative polymerization method to generate polyaniline, so as to obtain polyaniline-coated nanocellulose; the preparation method comprises the following steps: reacting phenol, an aminophenol derivative and a formaldehyde solution serving as raw materials under the action of a base catalyst to obtain modified A-stage phenolic resin; and uniformly mixing the polyaniline-coated nano cellulose with the modified resol, curing, crushing, carbonizing, activating, graphitizing, grinding and sieving to obtain the nitrogen-doped carrier activated carbon. The nanocellulose contains carbon, hydrogen and oxygen elements, gas can be generated in the preparation process of the activated carbon, and the pore structure of the activated carbon is expanded along with gas escape; a nitrogen-doped activated carbon pore wall is generated in situ by polyaniline around the occupation space of the nanocellulose, and the nitrogen element is beneficial to adjusting the size of active metal ruthenium particles and improving the activity and stability of the ammonia synthesis supported ruthenium catalyst prepared from the nitrogen-doped activated carbon pore wall.

The invention discloses a split-flow type flexible dynamic green ammonia synthesis system which comprises a synthesis gas compressor unit, a recycle gas compressor unit, a hot gas-gas heat exchanger, an ammonia synthesis tower, a water cooler, a cold gas-gas heat exchanger, at least one ammonia cooler and an ammonia separator, the method is characterized in that the feed gas is divided into two streams, one stream enters the hot gas heat exchanger to exchange heat with the reacted synthesis gas, and the other stream directly enters the ammonia synthesis tower through a first shunting pipeline to adjust the temperature of a bed layer in the ammonia synthesis tower. The condensation temperature of the synthesis gas, including the condensation temperature of the synthesis gas at the outlets of the water cooler, the cold gas heat exchanger and the ammonia cooler, is adjusted step by step according to the operation load condition of the device, so that the ammonia content in the synthesis loop is controlled step by step, the loop circulation gas amount is adjusted step by step, and the stable fluctuation of the pressure of the ammonia synthesis loop is maintained; and flexible dynamic operation of the device is realized.

The invention discloses a modified metal oxide catalyst and a plasma coupling electro-catalysis ammonia synthesis system based on the catalyst, cobalt oxide is modified by using radio frequency inductively coupled plasma (ICP) under a vacuum condition and an argon atmosphere, and the cobalt oxide catalyst rich in defects is obtained after discharging is finished. The ammonia synthesis system comprises a plasma activated air system and an electrocatalytic ammonia synthesis system; carrying out plasma discharge on air to generate NOX, cooling, and introducing the NOX into the absorption liquid; the absorption liquid is used as catholyte for electrocatalytic ammonia production in an H-shaped pool, and a cobalt oxide catalyst modified by plasma treatment is selected as a cathode. The cobalt oxide is treated by ICP, so that the problems of low conductivity, inert surface and the like of metal oxide are solved, and the performance of the catalyst is improved. The method solves the problems that plasma air discharge products are complex, and the ammonia yield is low due to the fact that N is equivalent to N cannot be efficiently activated through electro-catalysis.

The invention provides an improved ammonia production system based on a temperature swing adsorption principle. The improved ammonia production system comprises a water electrolysis hydrogen production module, a deep cooling air separation nitrogen production module, a multi-stage ammonia synthesis tower module and a double-bed circulating adsorption separation ammonia module, the water electrolysis hydrogen production module and the deep cooling air separation nitrogen production module provide raw material gas for the multi-stage ammonia synthesis tower module through a mixer, low-grade waste heat of a multi-stage ammonia synthesis tower serves as a heat source of the double-bed circulating adsorption separation ammonia module, and the double-bed adsorption separation ammonia module is connected with the multi-stage ammonia synthesis tower. The working conditions of an adsorption bed of the double-bed ammonia adsorption and separation module comprise an adsorption working condition and a desorption working condition, the adsorption bed alternately performs the adsorption working condition and the desorption working condition within the operation time, and low-grade waste heat from a multi-stage ammonia synthesis tower is used for driving to perform separation operation on ammonia synthesis gas so as to obtain high-purity ammonia; according to the invention, the operation pressure in an ammonia product separation project can be effectively reduced, circulation is formed, and the purity and the recovery rate of the obtained ammonia product are not reduced while the waste heat in the system is further utilized.

The invention discloses a forming method of a ruthenium-based ammonia synthesis catalyst, and belongs to the technical field of catalysts. Comprising the following steps: mixing ruthenium-based catalyst powder, bentonite and an extrusion aid to obtain powder, and adding deionized water into hydroxymethyl cellulose to form gel; and adding the powder into the gel, fully stirring, putting into an extruder, carrying out molding treatment, and then carrying out vacuum calcination. The prepared ammonia synthesis catalyst with the special-shaped structure has relatively high mechanical strength and relatively low abrasion rate, and the reduction of activity is avoided. The catalyst is used in an ammonia synthesis process, and can maximize the effect of a ruthenium-based catalyst according to the characteristics and requirements of high pressure and high temperature.

The invention discloses a photocatalytic material with a baseball-shaped structure as well as a preparation method and application of the photocatalytic material, and belongs to the technical field of photocatalytic synthesis of ammonia. The invention discloses a photocatalytic material with a baseball-shaped structure. The photocatalytic material comprises FeMOF with a rod-shaped structure and MnMOF with a spherical structure, the photocatalytic material with the baseball-shaped structure takes FeMOF with a rod-shaped structure as a substrate, and MnMOF with a spherical structure grows on the FeMOF with the rod-shaped structure; and the MnMOF with the spherical structure contains acetate ions. The preparation method comprises the following steps: dissolving an iron source and a manganese source in a solvent, adding an organic ligand, carrying out ultrasonic treatment, and carrying out a hydrothermal reaction; the manganese source is manganese acetate tetrahydrate. According to the photocatalytic material with the baseball-shaped structure, MnMOF with the spherical structure uniformly grows on FeMOF with the rod-shaped structure to form an electron and hole conversion channel, so that the electron and hole transmission rate is enhanced, the photocatalytic performance of the bimetal organic framework structure is enhanced, and the yield of photocatalytic synthesis ammonia is remarkably improved.

The present invention relates to the technical field of ammonia synthesis, and specifically to a device and method for synthesizing ammonia, wherein the device comprises: a microwave power supply, a microwave backflow prevention device, a three-pin dispenser, a microwave coaxial resonant cavity, and a dielectric barrier discharge reactor connected in sequence; the dielectric barrier discharge reactor is connected to a nanosecond pulse power supply, and is filled with a catalyst; a nitrogen source and a hydrogen source are connected to the gas inlet of the microwave coaxial resonant cavity. A mixed gas of nitrogen and hydrogen forms an atmospheric pressure nitrogen and hydrogen microwave discharge plasma at the opening of the microwave coaxial resonant cavity; the generated atmospheric pressure nitrogen and hydrogen microwave discharge plasma acts together with the plasma generated in the dielectric barrier discharge reactor, and under the synergistic effect of the catalyst in the dielectric barrier discharge reactor, ammonia synthesis is achieved, and the gas and catalyst surface temperatures can be separately controlled, and the conversion efficiency and yield of the generated ammonia are high.

The invention discloses a preparation method and application of a molybdenum monatomic photocatalyst for producing ammonia through nitrogen reduction, and belongs to the technical field of photocatalytic material preparation. According to the preparation method, molybdenum hexacarbonyl is taken as a metal precursor, and molybdenum single atoms are introduced into a covalent organic framework material sp2c-COF by adopting a solvothermal synthesis method, so that the covalent organic framework photocatalyst is obtained; according to the covalent organic framework photocatalyst, molybdenum single atoms are anchored, the local coordination environment of a covalent organic framework is finely controlled, the unique electronic structure and catalytic activity of the molybdenum single atoms can effectively optimize electron cloud distribution of COFs, the adsorption and activation capacity on nitrogen molecules is enhanced, and the covalent organic framework photocatalyst has the advantages that the covalent organic framework photocatalyst is high in catalytic activity and high in catalytic activity; the covalent organic framework photocatalyst can effectively inhibit the compounding of photo-induced electron-hole pairs so as to prolong the service life of photo-induced electrons, so that the covalent organic framework photocatalyst has excellent ammonia production performance, and the ammonia production activity can reach 372.6 [mu] mol.g <-1 >. H <-1 > under the conditions of visible light and pure water.

The utility model discloses an ammonium sulfate wastewater treatment system which comprises an ammonium sulfate wastewater storage pool used for collecting ammonium sulfate wastewater, the calcium hydroxide preparation system is used for preparing a calcium hydroxide solution, an evaporator and a first circulating heater and is used for reacting ammonium sulfate wastewater and calcium hydroxide and heating and evaporating; the first crystallizer and the second circulating heater as well as the second crystallizer and the third circulating heater are used for two times of evaporative crystallization, a final concentrated solution is filtered by the filter and then flows into the mother liquor collecting tank to facilitate wastewater treatment, and evaporated ammonia gas is absorbed by the cooling absorption tower and the condensate collecting tank to form ammonia water; and condensate water of the second heat exchanger, the first circulating heater, the second circulating heater and the third circulating heater also flows back to the condensate collecting pool. According to the wastewater treatment system, ammonium sulfate wastewater and a calcium hydroxide solution are distilled and crystallized, so that calcium sulfate and ammonia water can be recovered, and waste utilization is realized.

The invention discloses a porous catalyst for preparing green ammonia and a preparation method and application thereof, the porous catalyst for preparing green ammonia comprises the following raw material components: 50-70% of austenite iron powder, 15-20% of silica gel and the balance of an auxiliary agent, and the auxiliary agent is a mixture of kaolin, calcium carbonate powder and diatomite. According to the porous catalyst for preparing the green ammonia, the green ammonia synthesis temperature and pressure are reduced, and the ammonia synthesis rate is increased; the catalyst is high in structural strength, good in stability, slow in attenuation, long in service life and capable of being continuously and stably used for a long time, the replacement frequency of the catalyst is reduced, and the production cost is reduced; the method is suitable for industrialization.

The invention provides an ammonia synthesis method with high activity under mild conditions, ammonia is synthesized through photo-thermal catalysis, a photo-thermal catalyst is a transition metal composite metal hydride, the metal hydride is an alkali metal hydride or an alkaline earth metal hydride and has high catalytic activity, and a high ammonia synthesis rate can be obtained. When the transition metal composite metal hydride is loaded on the carrier, the ammonia synthesis rate can be further improved, and the catalyst has a good application prospect.

The invention discloses a green synthesis ammonia and organic liquid hydrogen storage combined device. The device comprises a water electrolysis hydrogen production device, a nitrogen production device, an organic liquid hydrogen storage device, a low-pressure gas compressor, a synthesis gas compressor and an ammonia synthesis device, the water electrolysis hydrogen production device produces hydrogen and conveys the hydrogen to the organic liquid hydrogen storage device and the synthesis gas compressor; the nitrogen making device is used for making nitrogen and conveying nitrogen to the organic liquid hydrogen storage device and the synthesis gas compressor; the organic liquid hydrogen storage device reacts hydrogen-poor organic liquid with hydrogen generated by the water electrolysis hydrogen production device to generate hydrogen-rich organic liquid, nitrogen is introduced into the hydrogen-rich organic liquid for dehydrogenation reaction, and the hydrogen and the nitrogen are input into the low-pressure gas compressor; the low-pressure gas compressor and the synthesis gas compressor compress hydrogen and nitrogen and input the compressed hydrogen and nitrogen into the ammonia synthesis device; and the ammonia synthesis device generates ammonia under the action of the catalyst. The gas-liquid mass transfer efficiency and the hydrogen desorption rate are improved, the energy consumption and the operation and maintenance cost of the compressor are reduced, and accurate adjustment of the hydrogen-nitrogen ratio is achieved.

Ammonia, methanol, Fischer Tropsch products, and derivatives thereof are made by using hydrogen and oxygen supplied from an electrolyzer that is at least partially powered by renewable power, resulting in green process and systems that produce green products disclosed herein. A process using biomass and renewable energy includes producing an unshifted syngas from biomass and oxygen in a gasification unit, introducing water into an electrolyzer to produce an oxygen product and a hydrogen product, and introducing the oxygen product to the gasification unit. The electrolyzer is powered by renewable energy, and the oxygen product supplies at least a portion of the oxygen to the gasification unit.

The invention provides a unit combined power generation method and system based on hydrogen ammonia energy storage peak regulation, and belongs to the technical field of thermoelectric units, and the method specifically comprises the steps: determining the heat supply load data of the thermoelectric units at different time periods in the current date based on the analysis result of the heat supply data of the thermoelectric units, on the basis of the heat supply load data and the power supply load data in different time periods, when it is determined that the adjustment sensitivity of the power supply load in the time periods meets the requirement, similar heat supply time periods of the time periods are determined on the basis of the heat supply load data in the time periods, and heat supply deviation users in the different similar heat supply time periods are calculated on the basis of the distribution data of the heat supply deviation users in the different similar heat supply time periods. And whether the hydrogen prepared by the thermoelectric unit can be converted into ammonia gas in the time period is determined, so that the utilization efficiency of energy is improved.

Reduction of the water content of ammonia used in an ammonia cracking process allows the use of water intolerant cracking catalysts. The water removal process can also be used to recover and recycle ammonia from the cracked gas.

The invention relates to the technical field of hazardous waste resource utilization, in particular to a method for synergistically recovering valuable elements of overhaul slag and chromium-containing aluminum mud. The method comprises the following steps: mixing inorganic acid, chromium-containing aluminum mud and overhaul slag to obtain a decyanation material; carrying out a precipitation reaction on the decyanation material by using an alkaline component to obtain a precipitation material; mixing the first preheated silicon tetrachloride with the precipitation material to obtain first chlorinated flue gas and first chromium-containing chlorinated slag; mixing the second preheated silicon tetrachloride with the first chromium-containing chlorinated slag to obtain second chlorinated flue gas and second chromium-containing chlorinated slag; respectively separating and purifying the first chlorinated flue gas and the second chlorinated flue gas to obtain an aluminum-containing solid phase, an iron-containing solid phase and silicon tetrafluoride; and washing the second chromium-containing chloride slag to obtain a trivalent chromium-containing solution. According to the method, the removal rate of toxic elements of the overhaul slag and the chromium-containing aluminum mud can be synchronously increased to 99.95% or above, and the recovery rate of valuable elements such as aluminum, iron and chromium can be synchronously increased to 95% or above.