118 results about "Steam reforming" patented technology

The invention relates to an energy optimization system for natural gas hydrogen production, compressed air energy storage and air direct carbon capture coupling, which comprises a natural gas steam reforming system, an outlet of a water supply preheater is connected with an inlet of a steam generator, and an outlet of the steam generator is connected with an inlet of a reaction gas preheater; an outlet of the reaction gas preheater is connected with an inlet of the reforming reactor, an outlet of the reforming reactor is connected with an inlet of the water vapor generator, and an outlet of the water supply preheater is connected with an inlet of the hydrogen pressure swing adsorption bed; according to the flue gas carbon capture system, an inlet of a flue gas cooler is connected with an outlet of a water vapor generator, and an outlet of the flue gas cooler is connected with an inlet of a flue gas carbon dioxide separation device; according to the compressed air energy storage and air direct carbon capture coupling system, an outlet of a compressed air cooler is connected with an inlet of a carbon dioxide pressure swing adsorption device, and an outlet of the compressed air cooler is connected with an inlet of a reaction gas preheater.

A process for the production of hydrogen comprises: a first steam reforming step of a feedstock containing hydrocarbons to obtain a first synthesis gas; a first synthesis gas shift and cooling step on the first synthesis gas; a separation step for separating the first synthesis gas into a high concentration hydrogen stream and a tail gas stream; a second low pressure steam reforming step performed on the tail gas to obtain a second synthesis gas; a second synthesis gas shift and cooling step on the second synthesis gas; a CO2 removal step performed on the stream of hydrogen and carbon dioxide exiting the second synthesis gas shift and cooling step in order to separate a CO2 stream from a fuel grade hydrogen stream; a step of feeding at least a part of the fuel grade hydrogen stream to the first steam reforming step.

An apparatus for steam reforming includes a reactor, a condensate separator, a condensate stripper, and a steam boiler. The reactor produces hydrogen and is connected to the condensate separator such that a gas mixture is conducted from the reactor into the condensate separator. The condensate separator and the condensate stripper are connected so that condensate separated out in the condensate separator is conducted into the condensate stripper. The condensate separator and the steam boiler are connected such that cleaned condensate can be conducted into the steam boiler. The steam boiler is connected to the reactor and to the condensate stripper in a steam-conducting manner. The boiler water feed line of the steam boiler is connectable to the condensate stripper in a liquid-conducting manner. A supply from the boiler water feed line is at a same location of the condensate stripper as a supply of the condensate from the condensate separator.

A process for steam reforming a hydrocarbon feedstock containing one or more nitrogen compounds, including passing a mixture of the hydrocarbon feedstock and steam through a catalyst bed of one or more nickel steam reforming catalysts disposed within a plurality of externally heated tubes in a tubular steam reformer, each tube having an inlet to which the mixture of hydrocarbon and steam is fed, an outlet from which a reformed gas containing hydrogen, carbon monoxide, carbon dioxide, steam, ammonia and methane is recovered. The steam reforming catalyst at least at the outlet of the tubes comprises nickel dispersed over a porous metal oxide surface present as a coating on a non-porous metal or ceramic structure The nickel content of the metal oxide coating is in the range of 5 to 50% by weight and the thickness of the coating is in the range of 5 to 150 micrometres.

The application discloses a biomass fermentation process for preparing green methanol, which comprises the following steps: providing a biomass raw material, and fermenting to obtain biogas; obtaining rich-methane gas after crude purification of the biogas; obtaining qualified rich-methane gas after super-precision detoxification of the rich-methane gas; adding medium-pressure steam into the qualified rich-methane gas, and performing a methane steam reforming reaction to obtain a mixed gas; performing PSA treatment on the mixed gas to obtain a resolved gas and a raw material gas; and feeding the resolved gas into a normal-temperature catalytic heat exchange system, and taking the raw material gas as one of raw materials for methanol synthesis to prepare refined methanol. The application realizes full-chain coupling and efficient utilization, combines biomass fermentation, biogas purification and methane steam reforming, and adopts a CO2 circulation technology. The application realizes full-process energy integration: the waste heat in the fermentation process, the waste heat of the PSA resolved gas and the waste water of rectification are utilized to drive the methane steam reforming reaction, the system energy consumption is reduced, and the economic efficiency and sustainability of the system are further improved.

A method can be employed to regulate and stably operate a steam reforming system that is operated by steam reforming, that has a capacity utilization level that can be regulated, and that comprises a steam reformer, a hydrogenating and desulfurizing unit that is positioned upstream of the steam reformer and is configured for feedstock desulfurization, and a firing unit of the steam reformer. According to the method, a mandated capacity utilization level for the steam reforming system is established with automated regulation of the following continuously monitored parameter ratios: a hydrogen-to-feedstock ratio in the hydrogenating and desulfurizing unit, a steam-to-carbon ratio in the steam reformer, and a fuel-to-air ratio in the firing unit of the steam reformer.

The invention relates to the field of ethanol reforming catalysts, and discloses an ethanol steam reforming hydrogen production catalyst and a preparation method and application thereof. The catalyst comprises an active metal element Ni and a carrier CeO2, and based on the metal element, Ni accounts for 10-20wt% of the mass of the catalyst. The catalyst provided by the invention has the advantages of carbon deposition resistance, sintering resistance, high temperature resistance and good activity, selectivity and stability. The preparation method of the catalyst provided by the invention has the advantages of convenience in operation, low synthesis temperature, safety and economy.

The application discloses a foamed copper low-temperature methanol water vapor reforming hydrogen catalyst and a preparation method thereof, and belongs to the technical field.The technical scheme is as follows: including pretreatment, chemical plating reaction, impregnation, pre-copper plating, copper electroplating, calcination, hydrothermal reaction and high-temperature treatment.The foamed copper catalyst prepared by the application has the advantages of more uniform dispersion of active components, higher porosity and better stability;Al does not need to be added, and the active component is the carrier;and the preparation process is simple, convenient to operate, low in cost and obvious in industrial application value.

The present application relates to a kind of CoFe-LDHs / VMT composite catalyst and its preparation method, belong to electrocatalysis field.The CoFe-LDHs / VMT composite material prepared by the present application can efficiently catalyze the preparation of hydrogen and nitrogen by cracking urea, which provides a train of thought for the industrialization of hydrogen and nitrogen prepared by urea electrolysis.Compared with traditional methane steam reforming to prepare hydrogen and water electrolysis to prepare hydrogen, the energy consumption is low, and the polluting urea is converted into non-polluting hydrogen for human use, which solves the problem of environmental pollution and energy crisis.

This invention discloses a photothermal catalyst based on Ni supported on porous carbon derived from tea residue and its application in hydrogen production from waste natural biomass. The catalyst preparation method includes tea residue raw material pretreatment, preparation of tea residue-derived carbon materials, KOH chemical activation, acid washing and water washing followed by drying, then impregnation and loading with a nickel precursor, and finally reduction in a hydrogen atmosphere to obtain the catalyst. This catalyst can catalyze the biomass steam reforming hydrogen production reaction under focused sunlight irradiation. This invention organically couples the resource utilization of tea residue solid waste with the solar photothermal-driven biomass reforming hydrogen production process, achieving synergistic effects of high-value utilization of agricultural and forestry waste and clean solar hydrogen production. The process is simple, the raw materials are readily available, and it is environmentally friendly, possessing good prospects for industrial application.

To provide a fuel cell system that can perform sufficient steam reforming even when using reforming water containing carbon dioxide. [Solution] The fuel cell system comprises a fuel cell 1, a fuel processing unit 2 that generates a hydrogen-containing fuel gas supplied to the fuel cell 1 by steam reforming, a reforming water storage unit 4 that stores water to be used as reforming water for steam reforming, a reforming water supply unit 5 that supplies the reforming water to the fuel processing unit 2, a recovered water recovery unit 6 that recovers water contained in the exhaust gas discharged from the fuel processing unit 2 as recovered water and supplies the recovered water to the reforming water storage unit 4 as reforming water, and a control unit C. The reforming water supply unit 5 has an adjustment mechanism that adjusts the flow rate of the reforming water flowing through the reforming water supply passage 51, and the control unit C calculates an estimated value of the carbon dioxide concentration in the reforming water based on temperature information related to the water as reforming water, and controls the adjustment mechanism based on the estimated value.

The invention provides a method for preparing methane through pyrolysis of medical waste and application of the method, and relates to the technical field of medical waste treatment and energy recovery, and the method comprises the following steps: pyrolyzing the medical waste to obtain pyrolysis gas, purifying the pyrolysis gas, then carrying out steam reforming reaction to obtain reacted gas, separating and purifying the reacted gas to obtain the methane. Methane is obtained; during pyrolysis, the temperature is increased to 190 DEG C to 210 DEG C and kept for 8 min to 12 min, then the temperature is increased to 390 DEG C to 410 DEG C and kept for 13 min to 17 min, and then the temperature is increased to 540 DEG C to 560 DEG C and kept for 30 min to 40 min; the steam reforming reaction catalyst is a lanthanum modified nickel-based catalyst. According to the method, the technical effects of destroying pathogens in the medical wastes, cracking macromolecular organic matters, improving the methane yield and purity and reducing the treatment cost are achieved, and harmless, resourceful and efficient treatment of the medical wastes is realized.

The invention provides a methanol steam reforming hydrogen production supported composite catalyst and a preparation method thereof, and relates to the technical field of hydrogen production catalysts. The preparation method adopts a fractional precipitation method and comprises the following steps: uniformly precipitating a first component to form an initial matrix with good dispersity; then a second component precursor solution is slowly dropwise added, and the second component is guided to be uniformly separated out on the surface or in pores of the initial matrix, so that the local enrichment phenomenon caused by too high precipitation rate is effectively avoided; according to the preparation method provided by the invention, directional optimization of carrier functions and accurate compatibility of active components can be realized through step-by-step operation; the composite catalyst prepared by the preparation method shows excellent activity and stability, the catalytic performance of the composite catalyst is always maintained at a high level in a continuous operation process, an obvious attenuation phenomenon does not occur, and the composite catalyst has a wide application prospect.

The utility model provides a bypass pressure regulating device for preventing overpressure of an outlet of a water pump. The bypass pressure regulating device is applied to a methane steam reforming hydrogen production system. The methane steam reforming hydrogen production system comprises a reactor, a gas-liquid separator and a subsequent purification process, and the reactor is communicated with the subsequent purification process through the gas-liquid separator; the gas-liquid separator is further connected with a water replenishing system, the water replenishing system comprises a water replenishing pump, a water replenishing inlet pipe, a water replenishing outlet pipe and a switch valve, and the inlet end of the water replenishing pump is communicated with the water replenishing inlet pipe. The bypass pipeline is additionally arranged in front of and behind the make-up pump, and the bypass pressure regulating device is arranged on the bypass pipeline, so that when the switch valve fails and does not react, or the switch valve and the make-up pump are not synchronous in starting and stopping actions, the pressure at the make-up water outlet pipe is increased, and the bypass pipeline is opened by the bypass pressure regulating device; liquid in the water replenishing outlet pipe can flow back into the water replenishing inlet pipe through the bypass pipeline and the bypass adjusting device, and overpressure of an outlet of the water replenishing pump can be effectively prevented.

A steam reforming reactor may comprise a shell, an inner tube disposed within the shell such that an annular portion is formed between the shell and the inner tube, a fluid inlet communicating with the annular portion, a fluid outlet communicating with the annular portion, a catalytic reactor system disposed within the annular portion, and at least one internal heating device disposed within the inner tube, wherein the catalytic reactor system may be configured to allow fluid to flow through the annular portion, and the at least one internal heating device may be configured to heat the fluid flowing through the annular portion.

The invention discloses a process method for preparing green hydrogen by coupling biomass flameless pyrolysis gasification with steam reforming, and relates to the technical field of hydrogen energy preparation and organic solid waste recycling, and the process method comprises the following steps: in a high-frequency electromagnetic heating austenite alloy rotary kiln, carbon-containing organic matters are subjected to primary cracking by using a light quantum energy field excited by an alloy; combustible gas and solid carbon residues are mixed; the primary product is introduced into a light quantum reforming reactor, high-temperature superheated steam is introduced into the light quantum reforming reactor, in the reforming reactor, the high-temperature steam is dissociated into active [H] atoms and [OH] free radicals under the action of a light quantum field, the active [H] atoms and the [OH] free radicals are subjected to an efficient roaming chemical reaction with primary combustible gas and solid carbon, and hydrocarbon and carbon are preferentially converted into H2 and CO; finally, the reaction product is subjected to pressure swing adsorption or molecular sieve separation to obtain high-purity hydrogen, energy field precise excitation and chemical reaction cooperation are achieved, and the yield and selectivity of hydrogen are greatly improved.

The invention provides an intelligent power supply system for solid-liquid fuel composite hydrogen production and high and low temperature fuel cell coupling. Comprising an aluminum hydride fuel tank, a methanol steam reforming hydrogen production reactor, a high-temperature proton exchange membrane fuel cell stack and a low-temperature proton exchange membrane fuel cell stack, an outlet of the aluminum hydride fuel tank is connected with an inlet of the high-pressure hydrogen storage bottle through a pipeline; an outlet of the high-pressure hydrogen storage bottle is connected with an anode inlet of the low-temperature proton exchange membrane fuel cell stack through a pressure reducing valve; according to the double-hydrogen-source cooperative coupling mechanism, through reaction characteristic complementation and energy gradient utilization, the inherent limitation of a single hydrogen source in fuel cell application is effectively solved, the traditional system architecture of a single hydrogen source and a single type of fuel cell is broken through, two hydrogen production modes and two electric pile technologies are creatively and deeply fused, and the energy utilization rate of the fuel cell is improved. The comprehensive breakthrough of the system in efficiency, dynamic response, fuel adaptability and reliability is realized.

A catalyst and method for Low Temperature Methane Steam Reforming, LTMSR. The LTMSR catalyst is based on a non-noble metal, an alkaline earth metal and a rare earth metal combination on a support to produce stable and low temperature methane steam reforming catalysts. The catalyst is suitable for steam reforming mixtures of light hydrocarbons, such as those found in natural gas and bio-gas sources. The output may be configured to provide methane and carbon dioxide in a ratio of around 1:1 by number which is suitable for further processing into end products. The process and catalyst may help show an improved long-term performance by suppressing the fast formation of coke that is well-known to deteriorate the activity of other conventional reforming catalysts. This performance is obtained by controlling the composition and crystalline sizes of the active catalyst components on the selected support and by controlling the reaction conditions.

This invention belongs to the field of catalyst technology, specifically relating to a multi-metal-doped cerium oxide catalyst and its preparation and application. The catalyst comprises a γ-Al₂O₃ support and an active component supported thereon, wherein the chemical formula of the active component is Ni. a Fe b Ru c Co d Ce1 a b c d O 2‑δ Wherein, 0.05≤a≤0.1, 0.04≤b≤0.06, 0.04≤c≤0.06, 0≤d≤0.06, and a+b+c+d≤0.2. The catalyst is prepared by solution impregnation, by preparing a metal salt solution and impregnating it on a γ-Al2O3 support to obtain a sol with a complexing agent, which is then aged, dried, and calcined in stages. The catalyst is used in the steam reforming reaction of aviation kerosene (n-dodecane simulation), and can achieve 100% catalytic conversion at 700 °C, without deactivation after 100 h of continuous operation, exhibiting low-temperature activity and anti-carbon deposition performance; wherein Ni 0.05 Fe 0.05 Ru 0.05 Co 0.05 Ce 0.8 O 2‑δ When reformed gas drives a tubular solid oxide fuel cell, the power density reaches 830.90 mW / cm³. 2 It operates stably for 100 hours without significant degradation. The process of this invention is simple and cost-controllable, and it is applicable to the fields of hydrogen production from aviation kerosene reforming and SOFC coupled power generation.

The application discloses a methanol reforming hydrogen micro-reactor and a control method, relates to the technical field of hydrogen energy, and comprises a reformer body, a catalyst and a burner. The parallel U-shaped rotary segments of the application span above a plurality of parallel combustion channels. Such a layout enables the methanol steam reforming reaction to uniformly absorb heat from the entire burner plane, rather than only absorbing heat from a local heat source, greatly improving the temperature uniformity of the reactor in the vertical and horizontal directions, effectively eliminating hot spots and cold spots, and controlling the method based on a heat contribution matrix and an ideal heat flux density curve. The method realizes precise regulation and control of the heat flux density as the core index at the micro-reactor level, directly acquires the spatial heat distribution through a heat flux sensor array, dynamically adjusts the fuel supply of each combustion channel, enables the energy input to be real-time and accurate, matches the dynamic demand of the reaction process, realizes on-demand heating, and significantly improves the system thermal efficiency.

Method for the preparation of synthesis gas combining electrolysis of water, tubular steam reforming and autothermal reforming of a hydrocarbon feed stock in parallel.

The invention relates to a method (100) for producing one or more process products, comprising providing a liquid hydrogenation feedstock (101) containing unsaturated hydrocarbons having three or more carbon atoms, hydrogenating (11) the hydrogenation feedstock (101) or a portion thereof to obtain a hydrogenation product (103), forming (12, 13) a reforming feedstock (105) using the hydrogenation product (103) or a portion thereof, and reforming (14) the reforming feedstock (105) to obtain a reforming product (107), wherein the reforming (14) comprises steam reforming and / or autothermal reforming. A corresponding plant is also proposed.

This invention belongs to the field of energy catalysis, and relates to a trace noble metal synergistic Ni / Al2O3 methane steam reforming catalyst, its preparation method, and its application. The trace noble metal synergistic Ni / Al2O3 methane steam reforming catalyst comprises an Al2O3 support, Ni supported on the Al2O3 support, and a noble metal M supported on the Al2O3 support. Ni accounts for 5-15 wt% of the Al2O3 support, and the noble metal M accounts for 0.001-0.005 wt% of the Al2O3 support. M is selected from one or more of Pt, Rh, Ir, Pd, and Au. This invention significantly enhances the activity of methane steam reforming through the synergistic effect between trace noble metals and Ni, achieving a significant performance improvement even with a 2-3 order of magnitude reduction in the amount of noble metal used. This invention significantly reduces the consumption and cost of noble metals while ensuring efficient hydrogen production, and has good prospects for engineering applications.

The invention discloses an explosion-proof type micro-channel reactor methanol steam reforming hydrogen production system, and belongs to the technical field of methanol hydrogen production, the explosion-proof type micro-channel reactor methanol steam reforming hydrogen production system comprises a cabin and a plurality of blowing mechanisms, an inner cavity of the cabin is divided into a treatment cavity, a reaction cavity and a trapping cavity which are mutually independent through partition plates, and a public cavity is formed in the bottom of the cabin; the processing cavity, the reaction cavity and the trapping cavity are separately communicated with the public cavity through respective isolating valves and pressure release valves; and the plurality of blowing mechanisms are used for blowing inert gas to the processing cavity, the reaction cavity and the trapping cavity. Core processes such as material mixing, heat exchange vaporization, reforming reaction, gas-liquid separation and carbon capture for hydrogen production by methanol reforming are correspondingly arranged in the treatment cavity, the reaction cavity and the capture cavity, so that the occupied area is reduced, and the space utilization rate is increased; the concentration of hydrogen leaking from the cavity is rapidly diluted through the multiple blowing mechanisms, the explosion or combustion risk caused by the fact that hydrogen exceeds the standard is reduced, the safety of personnel and equipment is effectively guaranteed, and the use safety is improved.

The invention relates to the technical field of solar thermochemical utilization and hydrogen preparation, and discloses a hydrogen separation and CO2 adsorption synergistic reinforced solar methanol reforming hydrogen production system, which integrates a reaction unit and a separation unit, and solves the problem of reaction separation disjunction of a traditional system. In the prior art, most of a reaction unit, a carbon dioxide removal unit and a hydrogen separation unit are independent equipment and need to be connected through pipelines, and the problems of heat loss, reaction inhibition and the like exist. The membrane-adsorption coupling reaction separation unit adopts an integrated reforming reaction kettle structure of a glass tube, a vacuum region, a heat absorption tube, a reaction region and a hydrogen permeable membrane, and four functions of solar heat absorption, methanol steam reforming reaction, carbon dioxide adsorption removal and hydrogen selective separation are integrated and designed in the same equipment; real-time cooperation of reaction and separation is guaranteed from the space structure, the space utilization rate is improved, meanwhile, heat loss and the reaction inhibition effect are greatly reduced, and the overall efficiency of the system is remarkably improved.

The invention relates to a method for producing ammonia, in which a mixed gas having carbon dioxide, hydrogen and nitrogen is produced in one step by means of a steam reforming device, said mixed gas then flowing into an amine system (9), in which carbon dioxide is separated from the mixed gas in the amine system (9), wherein a synthesis gas consisting of nitrogen and hydrogen produced from an amine system (9) is conducted to a synthesis gas compressor (15), and wherein the synthesis gas is conducted downstream of the synthesis gas compressor (15) to an ammonia reactor (2) in which the nitrogen chemically reacts with the hydrogen to form ammonia, wherein the thermal energy generated in the synthesis gas compressor (15) is used to generate steam in the synthesis gas waste heat steam generator (16), which is fed to the amine system (9).

The application relates to the technical field of fuel cells, in particular to a generalized SOFC system energy flow calculation and visual analysis method and device, which comprises the following steps: inputting preset boundary conditions of a target generalized SOFC system, a steam reforming reaction degree parameter determined by experimental data and steady-state data into a thermodynamic calculation model, and outputting fluid components and material enthalpy values of each node of the target component; after detecting that the preset thermodynamic assumption is met, calculating actual heat exchange efficiencies of each heat exchanger, and then constructing a system energy flow distribution matrix based on the efficiencies and the component input and output enthalpy values, so as to determine a visual data structure and obtain a visual analysis result. According to the embodiment of the application, an analysis tool directly reflecting energy flow and distribution can be automatically generated according to experimental data, researchers can directly grasp the details of energy transmission and loss in the system, and the efficiency and accuracy of SOFC system research and development testing are improved.

The invention discloses a method for producing synthesis gas by microwave coupling Ni modified red mud catalytic tar steam reforming, and relates to the technical field of biomass energy utilization. The method comprises the following specific steps: drying, grinding and sieving red mud to obtain red mud powder, and modifying the red mud powder by an impregnation method to obtain a Ni modified red mud catalyst; preparing the model compound of the biomass tar and water vapor into reaction raw material gas; placing the Ni modified red mud catalyst in a microwave reaction device, introducing reaction raw material gas, carrying out steam reforming reaction, and obtaining generated gas after the reaction is finished; and condensing and separating the generated gas to obtain the synthesis gas. By utilizing the synergistic effect of microwave heating and the Ni modified red mud catalyst, the biomass tar is efficiently catalyzed and reformed, the tar conversion rate and the synthesis gas yield are remarkably improved, the synergistic resource utilization of the red mud and the biomass tar is realized, and good economic benefits, social benefits and environmental benefits are achieved.

The invention relates to a system and a method for synthesizing blue ammonia from associated gas of a floating oil and gas field and air. Compared with the prior art, associated gas is treated through the raw material module to obtain methane-rich gas; the methane-rich gas is treated through a reforming module to obtain synthesis gas; wherein a methane catalytic reforming reaction is carried out through the steam reforming reactor, and a methane air partial oxidation reaction is carried out through the partial oxidation reactor; the synthesis liquefaction module is used for synthesizing blue ammonia through synthesis gas, methane generating carbon emission is converted into green energy ammonia, air is directly used as raw material gas, a special nitrogen generation module does not need to be independently arranged, the problem that a large amount of high-purity nitrogen is prepared on the sea is solved, the occupied area of equipment is reduced, and the stability under the working condition of shaking on the sea is improved; the requirements for compact arrangement and gravity center control of the floating platform are easily met, the method is suitable for large-scale production, and clean conversion and utilization of offshore oilfield associated gas are achieved.

The specification describes a gas heated reformer apparatus comprising: one or more tubes containing a steam reforming catalyst; and a shell surrounding said tube(s) and together with the tube(s) defining a shell side; wherein the shell comprises an inlet and outlet for a heat exchange medium; wherein the shell side is provided with a water gas shift catalyst located at one or more areas of the shell side where during use the heat exchange medium in contact with the shell side has a temperature of 500-750° C. Also described is a plant for producing hydrogen, ammonia or methanol comprising the gas heated reformer. A water gas shift catalyst can be retrofitted to an existing gas heater reformer.