166results about "Hydrogen production" patented technology

A process for process for generating power in an ammonia-fueled gas turbine power plant includes flowing an ammonia feed stream to an ammonia cracker reactor in geographical proximity to an ammonia-fueled gas turbine power plant to crack ammonia feed stream under cracking conditions, thereby producing a product effluent comprising ammonia and hydrogen, flowing the product effluent comprising ammonia and hydrogen to an ammonia-fueled gas turbine of an ammonia-fueled gas turbine power plant, and combusting the product effluent comprising ammonia and hydrogen to drive the ammonia-fueled gas turbine. An exhaust gas stream generated from the ammonia-fueled gas turbine is recycled back to supply heat to the ammonia cracker reactor.

A method for producing a metal-organic framework. The method includes: dissolving an acid compound having terephthalic acid as its main molecular structure, polyacrylic acid, and a silver-containing compound to produce an intermediate A; mixing a titanium-containing metal oxide cluster into the intermediate A to produce an intermediate B; heating the intermediate B to produce an intermediate C in a solid form; and repeatedly dissolving and centrifuging the intermediate C to produce a metal-organic framework.

The application provides a controllable hydrogen system and a controllable hydrogen method, and the controllable hydrogen system comprises a reactor, an aluminum conveying module, a sodium hydroxide conveying module, a water conveying module and a recovery module; the aluminum conveying module, the sodium hydroxide conveying module and the water conveying module are communicated with the reactor respectively; the reactor is provided with a first outlet and a second outlet; the recovery module comprises a diaphragm filter system, a first inlet of the diaphragm filter system is communicated with the first outlet of the reactor, the diaphragm filter system further comprises a third outlet, and the third outlet is communicated with the reactor; and the second outlet is used for conveying generated hydrogen. The controllable hydrogen method of the application utilizes the controllable hydrogen system to realize efficient controllable hydrogen, and utilizes the diaphragm filter system to recycle by-products and sodium hydroxide, so that the utilization rate of resources is improved.

A process for producing a synthesis gas, comprising the steps of: (i) autothermally reforming a feed gas containing methane with an oxygen-containing gas in an autothermal reformer to produce a crude synthesis gas containing hydrogen, carbon monoxide, carbon dioxide and steam at a temperature above 850 °C; (ii) cooling the crude synthesis gas to a temperature in the range 350 to 400 °C; (iii) passing the cooled crude synthesis gas adiabatically through a first water- gas shift vessel containing a high temperature shift catalyst to form a first hydrogen-enriched synthesis gas at a temperature above 425 °C; (iv) cooling the first hydrogen-enriched synthesis gas by heat exchange in a first shift effluent interchanger to generate a cooled first hydrogen-enriched synthesis gas; (v) passing the cooled first hydrogen-enriched synthesis gas adiabatically through a second water-gas shift vessel containing a shift catalyst to form a second hydrogen-enriched synthesis gas, and (vi) cooling the second hydrogen-enriched synthesis gas to generate a cooled second hydrogen-enriched synthesis gas; wherein the feed gas containing methane is preheated to a temperature of 375 °C or higher by passing it through at least the first shift effluent interchanger before feeding it, without further heating, to the autothermal reformer.

Systems and methods for generating hydrogen are provided. The system includes a silica generator configured to generate an injection fluid comprising silica particles, an injection apparatus configured to inject the silica injection fluid into a target zone of an injection well, and a sonicator configured to transmit sound waves to the target zone of the injection well. The method includes generating an injection fluid comprising silica particles, injecting the injection fluid into the target zone of the injection well, and sonicating the target zone of the injection well, thereby generating hydrogen.

Use of a high-temperature resistant alloy for making at least one equipment part of an ammonia cracking plant, wherein said at least one equipment part is exposed to a pressure of 1 to 100 bar, to a temperature of 500 to 1150 °C and to contact with a stream having an ammonia content that ranges from 5% to 100% by volume; wherein said alloy comprises 30% to 50% by weight of nickel and 20% to 40% by weight of chromium.

The application discloses a cement-chemicals co-production system and a control method thereof, and belongs to the technical field of carbon emission reduction and resource utilization in the cement industry. The system comprises a water electrolysis hydrogen production unit, a microwave-assisted hydrogen calcination unit, a cement clinker sintering unit, a synthetic gas purification unit, a synthetic gas proportioning unit, a chemical synthesis unit, a waste heat recovery unit and an automatic control and data monitoring unit. The microwave-assisted hydrogen calcination technology is used to decompose calcium carbonate into CO synthesis gas, oxygen by-product of water electrolysis is used for oxygen-enriched combustion, combined with accurate proportioning of synthetic gas and DCS and artificial intelligence collaborative control, the collaborative production of cement clinker and high-value chemicals is realized. The application reduces the carbon emission of the system by more than 70% compared with the traditional process, reduces the comprehensive energy consumption by more than 30%, the thermal efficiency is greater than or equal to 85%, the synthetic gas conversion rate is greater than or equal to 80%, and the carbon resource utilization rate and production stability are significantly improved, and the application has outstanding economic and environmental benefits.

The present invention relates to a method for the CO2-neutral commercial recovery of metallic magnesium from seawater, wherein the recovered magnesium is further processed for use as a metallurgical raw material and can also be used as a starting material for the CO2-neutral recovery of hydrogen, and the CO2 recovered or released throughout the method is dissolved and bound to seawater.

A hydrogen production apparatus according to one aspect of the present disclosure comprises: a means for irradiating a metal oxide in a solution with laser light and reducing the metal oxide; a means for separating and transporting the reduced metal; a means for reacting the reduced metal with water and generating hydrogen; and a step for recovering the generated hydrogen.

This invention discloses a system and method for decomposing hydrogen iodide using boiler heat exhaust gas. The system comprises a mixed liquid container, a mixed liquid pump, a pump outlet control valve, a boiler high-temperature exhaust gas area, and a temperature control valve. The outlet of the mixed liquid container is connected to the inlet of the mixed liquid pump, the outlet of the mixed liquid pump is connected to the inlet of the pump outlet control valve, the outlet of the pump outlet control valve is connected to the inlet of the boiler high-temperature exhaust gas area, and the outlet of the boiler high-temperature exhaust gas area is connected to the inlet of the temperature control valve. This invention obtains heat from the boiler exhaust gas of a power plant, and by simply installing a hydrogen iodide heating device in the high-temperature section of the boiler furnace, both sides of the hydrogen iodide heating device become low pressure, significantly improving safety. Furthermore, because heat is obtained directly from the exhaust gas, it is more economical than steam or electrical energy.

The present invention relates to a ruthenium-based ammonia cracking catalyst, and more particularly to an ammonia cracking catalyst in which ruthenium, an active metal, and potassium, an auxiliary metal, are supported on a lanthanum-containing yttria-stabilized zirconia support, and to a method for producing the same. The ammonia cracking catalyst according to the present invention, even when using a low content of ruthenium metal, can achieve very high ammonia conversion rates and hydrogen production efficiencies even at low temperatures compared to catalysts with the same ruthenium metal content by adjusting the ruthenium / potassium ratio together with a lanthanum-containing yttria-stabilized zirconia-alumina support, minimizing the content of chlorine and nitrogen compounds which are impurities in the catalyst, and specifying the position of the active metal in the catalyst.

Conventional thermal decomposition and carbonization technologies for plastics have resulted in inefficient and uniform carbonization of plastics, leading to low carbonization rates of the carbides and low yields of reformed gas during gasification of the carbides. Consequently, ethanol could not be efficiently and stably obtained in ethanol production processes using the reformed gas. [Solution] The present invention provides an ethanol production method and apparatus comprising: a carbonization step of co-carbonizing plastic and biomass to produce a carbide; a reforming gasification step of generating a reformed gas containing hydrogen, carbon monoxide, methane, and carbon dioxide through a mixed gasification reaction of the carbide with water vapor and carbon dioxide; and an ethanol production step of supplying the reformed gas to an ethanol production step and producing ethanol by contacting it with a C2 oxygenation catalyst and a hydrogenation catalyst in the ethanol production step; separating and recovering a metal-containing residue generated together with the reformed gas in the reforming gasification step, and mixing the recovered metal-containing residue with the plastic and biomass.

The subject of this invention is the system for generation and use of hydrogen in which a subsystem for hydrogen generation (U1) contains a reaction chamber (1) with aluminium (2) and sodium hydroxide (3), to which a water nozzle (4) is attached, connected through a duct (5) to a water pump (6). The upper part of the reaction chamber (1) contains an outlet connection (7) connected to a subsystem for hydrogen purification (U2), which is connected to the subsystem for hydrogen oxidation (U3), to which an inlet (27) through oxygen is supplied, is connected. This system is characterised in that the subsystem for hydrogen purification (U2) contains at least one water tank (9) connected to the subsystem for hydrogen oxidation (U3), which outlet (21) is connected through a non-return valve (22) with the condensing tank (23).

The disclosure relates to systems and methods to produce hydrogen (H2) gas from hydrogen sulfide (H2S). H2S is contacted with a catalyst to form H2 gas and sulfur adsorbed to the catalyst. The adsorbed sulfur is contacted with oxygen (O2) gas to convert the adsorbed sulfur to sulfur dioxide (SO2) and regenerate the catalyst.

A method of more stably synthesizing methanol from a gas containing carbon dioxide and sulfur compounds, such as blast furnace gas. The method includes: a water addition process of adding water to a feed gas G01; a hydrolysis process of hydrolyzing carbonyl sulfide contained in obtained hydrated feed gas into hydrogen sulfide and carbon dioxide; a water-gas shift reaction process of converting carbon monoxide and water contained in obtained hydrolyzed gas into carbon dioxide and hydrogen; a carbon dioxide gas separation process of separating obtained shift reaction gas into carbon dioxide gas and gases of components other than carbon dioxide; a desulfurization process of removing at least hydrogen sulfide from hydrogen sulfide and carbonyl sulfide contained in the carbon dioxide gas to obtain a high-concentration carbon dioxide gas; a hydrogenation process of adding hydrogen gas to the high-concentration carbon dioxide gas; and a methanol synthesis process of reacting carbon dioxide and hydrogen contained in obtained methanol feed gas.

This invention provides a technology for producing photocatalytic particles with high oxygen-generating activity. [Solution] A method for producing photocatalytic particles according to one aspect of the present invention is a method for producing photocatalytic particles comprising supporting a co-catalyst on photosemiconductor particles having a composition represented by the following general formula (I), comprising: an oxidation treatment step of oxidizing the photosemiconductor particles; and a co-catalyst supporting step of supporting the co-catalyst on the photosemiconductor particles after the oxidation treatment step, wherein the oxidation treatment step is performed by carrying out at least one of the following (i) and (ii): (i) oxidizing the photosemiconductor particles in an oxidizing agent solution; (ii) oxidizing the photosemiconductor particles by heating them in an oxidizing atmosphere at a temperature greater than 300°C and 450°C or less. M a Ti b O c S d …(I) (However, M is one or more combinations selected from Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Y, and is a number with a=1.7~2.3, b=2, c=4.7~5.3, and d=1.7~2.3.)

The application provides a method and device for producing ethanol in two steps, which comprises the following steps: step S1: carrying out a reaction of decomposing water to produce hydrogen under the action of a metal oxide catalyst at a normal pressure and at a reaction temperature of 500 DEG C to 1300 DEG C; and step S2: carrying out a reaction of the hydrogen prepared in step S1 with carbon dioxide to produce ethanol under the action of a composite metal oxide catalyst at a reaction pressure of 1 to 10 standard atmospheres. The application can meet the need of producing a large amount of ethanol, save electric energy, improve the utilization rate of heat energy and has great environmental value.

According to exemplary embodiments of the present invention, a hydrogen production method and a hydrogen production system can be provided, the hydrogen production method optimizing ammonia decomposition conditions, thereby ensuring sufficient ammonia decomposition efficiency and preventing the occurrence of side reactions of a catalyst.

The application discloses a preparation method of a cadmium sulfide-zinc sulfide-cuprous sulfide nano heterojunction material, and belongs to the technical field of nanometer materials. The application further provides the cadmium sulfide-zinc sulfide-cuprous sulfide nano heterojunction material and application thereof. The cadmium sulfide-zinc sulfide-cuprous sulfide nano heterojunction material prepared by the application has high photocatalytic hydrogen evolution efficiency and high stability.

A process for the production of hydrogen from a small molecule hydrogen vector by reforming such small molecule hydrogen vector under light in the presence of a light-absorbing carbon enabler.

A highly crystalline mesoporous sulphur functionalized carbon nitride and a process for producing the same. The process including the steps of: providing a carbon nitride precursor material; mixing the carbon nitride precursor material with a metal salt to form a first mixture; and, thermally treating the first mixture to produce the crystalline carbon nitride.

The present application belongs to the field of hydrogen preparation and storage equipment. Disclosed are a magnesium-based solid hydrogen storage alloy in-situ hydrogen absorption and hydrolytic hydr

The utility model discloses a simple hydrogen fuel cell is with hydrogen production device, including main casing, the main casing is by mounting seat, front end cover and stand, be equipped with three mounting sites of triangular arrangement in the mounting seat, form rear wall in mounting seat one side, and the rear wall and front end cover combination constitute the chamber for the battery and pump of deposit, and the stand is equipped in mounting seat between three mounting sites and rear wall, the stand is hollow, and with the chamber of deposit battery and pump intercommunication, the water pipe and water outlet pipe of pump stretch out from the top of stand, three mounting sites of mounting seat are respectively put into the water jar, hydrogen production reactor and dryer, and through the hose in proper order with water jar, pump, hydrogen production reactor and dryer intercommunication. The utility model discloses a simple hydrogen fuel cell is with hydrogen production device, this hydrogen production device structure simple, the assembly mode of each component is simple, is convenient for dismounting and replacement to realize the portability of hydrogen production device.

This invention is a divisional application of Chinese invention patent application No. 202310608706.5, filed on May 28, 2023, entitled "Slow-Release Hydrogen Production Material Containing Nano-Silicon and Its Application in Aquatic Ecosystem Restoration". This invention discloses a slow-release hydrogen production material containing nano-silicon and its preparation method, belonging to the field of environmental protection technology. The invention involves sterilizing a 2-5% sodium alginate solution, cooling it to room temperature, adding 0.3-0.5% wt of nano-silicon to the sodium alginate solution, and stirring at 500-600 r / min at room temperature for 30-60 min to obtain a nano-silicon sodium alginate solution. The prepared nano-silicon sodium alginate solution is then added dropwise at a volume ratio of (1-5):1 to a 2-5% CaCl2 solution at a rate of 1 drop / second, and allowed to stand for 5-10 min to obtain the final product. The layered structure of this material allows the nano-silicon material to be uniformly distributed and stably produce hydrogen within the sphere.

This invention belongs to the field of fuel cell power generation technology, specifically relating to an NH3 / electricity-hydrogen-electricity conversion method and system. This invention produces pure hydrogen that can be directly used in PEMFC fuel cell power generation through NH3 chemical looping hydrogen production technology. Simultaneously, it utilizes an SOFC fuel cell to further convert unconverted fuel from the PEMFC fuel cell and the unconverted fuel from the chemical looping hydrogen production process into electricity. The unconverted fuel from the SOFC fuel cell is then used to burn with high-temperature air to heat the reduction reactor, or the combustion of the unconverted fuel from the SOFC fuel cell with high-temperature air is used to generate electricity through a combined cycle and electrically heat the reduction reactor. Addressing the problems of high hydrogen separation energy consumption and low system power generation efficiency in existing ammonia fuel cell power generation systems, this invention avoids some of the H2 / N2 separation energy consumption through chemical looping hydrogen production, while gradually utilizing unconverted fuel to improve power generation efficiency.

The torrefaction gas treatment device 400 makes it possible to chemically recycle torrefaction gas 202 produced from solid recovered fuel (SRF) pellets 117, etc. by torrefaction, without the need to combust the torrefaction gas 202.

According to exemplary embodiments of the present invention, a hydrogen production system may be provided, wherein energy efficiency is improved by recycling thermal energy generated in a hydrogen production process.

The present disclosure provides methods and systems for capturing carbon dioxide. An example system includes: a pyrolysis device configured to produce syngas and bio-oil from biomass; a power generator configured to produce electricity by combusting at least one of the syngas or the bio-oil; and a carbon capture system configured to use the electricity to capture carbon dioxide from a gas.

A Fischer-Tropsch (FT) process with a hybrid membrane / PSA configuration provides high component recoveries from FT off gas with minimum power consumption. Synthesis gas from a synthesis gas production zone is reacted in an FT reaction zone forming a liquid stream and an off gas stream. The off gas from the FT reaction zone, which contains hydrogen, carbon monoxide, and methane reactants, is recycled to the synthesis gas production zone. A purge stream from the recycle loop is sent to a membrane separation unit where it is separated into a permeate stream and a residue stream. The residue stream is separated in a pressure swing adsorption (PSA) unit into a fuel gas stream and a second stream. The second stream can be compressed and recycled to the synthesis gas production zone.

A process of dissociating ammonia into a dissociated hydrogen / nitrogen stream in catalyst tubes within a radiant tube furnace and an adiabatic or isothermal unit containing catalyst, along with downstream purification process units to purify the dissociated hydrogen / nitrogen stream into high purity hydrogen product.