731 results about "Water gas" patented technology

Herein discussed is a hydrogen production system comprising a first reactor zone and a second reactor zone, wherein both reactor zones comprise an ionically conducting membrane, wherein the first zone is capable of reforming a hydrocarbon electrochemically and the second zone is capable of performing water gas shift reactions electrochemically, wherein the electrochemical reforming reactions involve the exchange of an ion through the membrane to oxidize the hydrocarbon and wherein electrochemical water gas shift reactions involve the exchange of an ion through the membrane and include forward water gas shift reactions, or reverse water gas shift reactions, or both. In an embodiment, the membrane is mixed conducting. In an embodiment, the membrane comprises an electronically conducting phase and an ionically conducting phase.

An article for joule heating is described, including a three-dimensional substrate on and / or in which a pyrolyzate of a phenolic resin or polymer forms an electrically conductive carbon network. Such articles may be incorporated in structured materials applications, which may include support, sorbent, and or catalyst components. Also described are methods of fabricating such articles and structured materials, and apparatus comprising same, and methods of use of such articles and structured materials and apparatus for conducting material transformation processes requiring input of heat for their performance, such as CO2 adsorption, methane pyrolysis for hydrogen and carbon production, hydrogen-assisted conversion of CO2 to hydrocarbons, including catalytic conversion of CO2 to olefins, catalytic conversion of CO2 to propane (liquefied petroleum gas), and catalytic conversion of CO2 to renewable natural gas, reverse water gas shift reaction, steam ethane cracking, propane cracking, steam methane reforming, and dry methane reforming.

The present disclosure relates to a photoreactor and method of use thereof. In an aspect, the photoreactor can be configured as a solar panel comprising a channel containing a heterogeneous photocatalyst. When water or another hydrogen-containing liquid is pumped through the photoreactor, it contacts the photocatalyst in the presence of UV or visible irradiation, simultaneously releasing hydrogen and separating the hydrogen via a gas-permeable membrane. In an aspect, the photoreactor can be used in a method for continuous production of high-purity H2 gas, the method comprising dehydrogenating tetrahydroquinoline (THQ) to form quinoline under visible light using a Rh / TiO2 heterogeneous photocatalyst. In another aspect, the catalyst includes Rh particles photodeposited on TiO2 microparticles. In a further aspect, the method can include regenerating THQ from quinoline using a water gas shift (WGS) reaction.

The invention belongs to the technical field of catalysis, and particularly relates to preparation of a high-activity Cu / ZnO / SiO2 catalyst and a reverse water gas shift reaction. Aiming at the problems of low reaction activity of low-temperature RWGS, low selectivity of a target product CO and the like in the existing Cu / ZnO-based catalyst, the invention prepares a novel Cu / ZnO / SiO2 catalyst which is used for promoting the reaction activity of medium-low-temperature reverse water gas shift. According to the invention, the polyhydroxy high-molecular compound is adopted to replace a part of small-molecular solvent, the novel Cu / ZnO / SiO2 catalyst with a silicon source, copper and zinc highly dispersed in mesoporous SiO2 is obtained by utilizing the polyhydroxy characteristic and low degree of freedom of the polyhydroxy high-molecular compound, and when the novel Cu / ZnO / SiO2 catalyst is used for a medium-low temperature reverse water gas shift reaction, the reaction activity can be effectively improved to 58%, and the reaction time can be shortened to 30-50 minutes. Meanwhile, the selectivity of the target product CO is 99% or above. The method has the advantages of low catalyst cost, high reaction efficiency, simple process operation and the like, and has a good industrial application prospect.

The invention discloses preparation of a high-performance carbon matrix embedded iron-based catalyst based on a metal organic framework precursor and application of the high-performance carbon matrix embedded iron-based catalyst in reverse water-gas shift reaction. In the preparation process, commercially available 1, 3, 5-trimesic acid iron (the chemical formula is C9H3FeO6, abbreviated as Fe-BTC) is selected as a raw material, pyrolysis treatment is carried out in an argon atmosphere, then air passivation is carried out, and finally the high-performance carbon matrix embedded iron-based catalyst based on the metal organic framework precursor is successfully prepared. The MOF-600 has excellent performance in many catalysts, the carbon dioxide production rate reaches 24.0 mmol CO.gcat <-1 >. S <-1 > at the temperature of 400 DEG C in a reverse water gas shift reaction, the performance is remarkably superior to that of an existing non-noble metal catalyst, and extremely high catalytic efficiency and application potential are shown.

The invention belongs to the technical field of metallurgical industry gas resource utilization, and particularly relates to a method and system for preparing synthesis gas from blast furnace gas. The method comprises the steps that a CO2 adsorbent is heated to the first temperature to conduct CO2 adsorption on blast furnace gas, the adsorbent after CO2 adsorption is obtained, the CO2 adsorbent is CaO, and the first temperature is smaller than or equal to 650 DEG C; the adsorbent after CO2 adsorption is heated to a second temperature for CO2 desorption, obtained CO2 and H2 are catalyzed by a copper-based catalyst under the second temperature condition to be subjected to a reverse water-gas shift reaction, synthesis gas is obtained, and the second temperature is higher than or equal to 700 DEG C. The method provided by the invention realizes effective separation and conversion of carbon dioxide in blast furnace gas to obtain a synthesis gas product, thereby realizing closed cycle of carbon resources, remarkably improving the economical efficiency of blast furnace gas, and realizing efficient utilization of energy.

The invention provides a methanol production system comprising a reverse water gas reaction module having a first in-situ separation reactor configured to perform reverse water gas conversion of carbon dioxide and hydrogen, generate and in-situ separate carbon monoxide and water, a methanol synthesis module connected to the reverse water gas reaction module, and the second in-situ separation module is provided with a second in-situ separation reactor, and the second in-situ separation reactor is configured to generate and separate methanol in situ by utilizing the carbon monoxide generated by the reverse water gas reaction module to react with hydrogen. According to the scheme provided by the invention, a two-step methanol preparation process and the in-situ separation type reactor are organically coupled, so that the conversion of carbon dioxide can be completed under a relatively mild working condition; the problems of low one-way conversion rate, high recycling compression work and the like in methanol preparation through carbon dioxide hydrogenation are solved; the energy consumption for separating water and methanol is saved; the methanol production cost is further reduced, and the reliability and economy of the system are improved.

The invention provides a photo-thermal fused salt energy storage coupled green methanol preparation system which comprises a reverse water-gas shift unit, a methanol synthesis unit, a photo-thermal energy storage unit, a power generation unit and an electrolytic hydrogen production unit, and the photo-thermal energy storage unit absorbs light energy and generates heat energy; a heat energy outlet of the photo-thermal energy storage unit is communicated with a heat energy inlet of the reverse water-gas conversion unit; a heat energy outlet of the reverse water-gas conversion unit is communicated with a heat energy inlet of the power generation unit; a heat energy outlet of the methanol synthesis unit is communicated with a heat energy inlet of the power generation unit; an electric energy outlet of the power generation unit is communicated with an electric energy inlet of the electrolytic hydrogen production unit, and the electrolytic hydrogen production unit generates hydrogen; the carbon dioxide and the hydrogen enter a reverse water gas shift unit to generate shift gas; and the shift gas and hydrogen enter a methanol synthesis unit to generate methanol. The system can supply power and heat to the outside, and therefore co-production of products such as hydrogen, oxygen, synthesis gas and methyl alcohol, electric power and thermal power is achieved.

The invention relates to a method for preparing carbon monoxide by reverse water gas shift, which comprises the following steps: under the catalytic action of a supported catalyst, carrying out reverse water gas shift reaction, carrying out pressure swing adsorption treatment on mixed gas generated in the reaction process, and desorbing to obtain carbon monoxide. By coupling the reverse water gas shift reaction and the pressure swing adsorption process and exerting the synergistic effect of the reverse water gas shift reaction and the pressure swing adsorption process, efficient and rapid separation of carbon monoxide is realized, the reverse water gas shift reaction is promoted to be carried out in the forward direction, the reaction requirement of reverse water gas shift is reduced, the reverse water gas shift reaction is carried out under relatively mild conditions, and the reaction efficiency is improved. The long-period efficient conversion of carbon dioxide is realized, and the conversion rate of carbon dioxide and the selectivity of carbon monoxide are further improved.

The invention belongs to the field of drying machines, and particularly relates to an intelligent through-type vacuum drying machine which comprises a drying device, the upper surface of the drying device is fixedly connected with a pushing motor, the lower surface of the pushing motor is sleeved with a clamping shell, and rotating crawler belts are symmetrically arranged on the outer surface of the drying device; the number of the rotating crawler belts is four, and the outer surface of the drying device is rotationally connected with a fixed base through the rotating crawler belts. Due to the fact that the metal chain belt is provided with the inserting groove, after the upper inserting plate and the lower inserting plate are closed, the drying device can form a relatively-sealed space, moisture interference in the external environment is prevented, loss of internal heat is also prevented, after heating is finished every time, the upper inserting plate and the lower inserting plate are separated from each other, the internal heat and moisture are diffused, and the drying effect is improved. And the temperature in the drying device is quickly restored, so that the time for drying each time is fixed, and regular and quantitative production of products is facilitated.

The invention provides a Ce-doped Cu and Zn-Al layered bimetallic oxide catalyst for reverse water gas shift and a preparation method thereof, the catalyst is composed of ZnO, Al2O3, CuO and CeO2, and the mass ratio of ZnO to Al2O3 to CuO to CeO2 is (71-78): (12-15): (5-6): (2-11). According to the preparation method, CeO2 is selected to be doped in layered bimetallic oxide (LDO) formed by calcining Cu-LDH, and compared with TiO2 doping, it is found that CeO2 has a more remarkable catalytic effect compared with TiO2, and the prepared catalyst has excellent stability and can maintain high activity under long-time testing; and the catalyst has CO yield close to equilibrium yield under the condition of relatively low catalytic temperature (450 DEG C), has excellent industrial implementation conversion prospect, and is simple in process steps and suitable for continuous production.

The invention provides equipment and a method for testing the emission amount of harmful gas in a tunnel, and relates to the technical field of tunnel construction. Comprising a sleeve, a gas parameter testing unit installed on the sleeve, a water tank communicated with the interior of the sleeve and a gassing module installed on the water tank, and the gassing module is connected with the gas parameter testing unit; one end of the sleeve can be dynamically sealed with the drill rod, and the other end of the sleeve is of an opening structure; the gassing module is used for separating out gas in water and conveying the gas to the gas parameter testing unit; and the gas parameter testing unit is used for detecting the concentration and flow velocity of harmful gas in the sleeve and the concentration of harmful gas separated out from water. A gas parameter testing unit is arranged to monitor the data change of gas gushing out of the drill hole in real time; the gassing module can separate out gas in water in real time and convey the gas to the gas parameter testing unit to measure the concentration of dissolvable gas, so that the calculation of the emission amount is more comprehensive and accurate.

The application provides a reverse water gas shift catalyst, a preparation method and application thereof, and the reverse water gas shift catalyst prepared by the preparation method has excellent catalytic activity and high CO selectivity in a reverse water gas shift reaction. The preparation method comprises the following steps: contacting a precipitating salt solution with a precipitant aqueous solution and performing co-precipitation, and simultaneously controlling the reaction temperature to be 40-80 DEG C and the pH to be 6-8; optionally performing aging after the co-precipitation is completed; filtering the obtained precipitate to obtain a filter cake, washing the filter cake, then drying the filter cake, and calcining the filter cake at 300-500 DEG C to obtain the reverse water gas shift catalyst; wherein the precipitating salt solution is a mixed aqueous solution of a soluble salt of divalent metal ions and a soluble salt of trivalent metal ions, the divalent metal ions are selected from divalent ions of Mg and / or Zn, and the trivalent metal ions are selected from trivalent ions of Al, In and / or Ga.

The invention discloses a numerical simulation method and system for a coal underground gasification process, and belongs to the technical field of energy development. The method comprises the following steps: constructing a gasification cavity, cavity wall and raw coal three-area conceptual model; establishing a kinetic model coupled with five types of chemical reactions (complete oxidation, water vapor conversion, Boudouard reaction, hydrogenization and water-gas shift), and associating porosity change and cavity wall temperature gradient distribution; dynamic evolution prediction of the semi-teardrop-shaped gasification cavity is realized through a numerical flow of cyclically updating the porosity, marking the cavity, calculating the reaction and outputting the synthesis gas; a cavity form and synthesis gas component curve is generated based on a multi-module system (data preparation, numerical calculation, result analysis and visualization). The problem that the gasification cavity evolution simulation precision is insufficient in the prior art is solved, and the method is suitable for UCG engineering design and safety evaluation.

The utility model relates to the field of cable technology, and specifically to a flame-retardant special power cable, including a core, a filling layer, a wrapping, a shielding layer, an inner lining layer and a steel wire armor layer. The steel wire armor layer is provided with a flame-retardant layer filled with magnesium hydroxide filler on the outside, and a plurality of braided fiber ropes are provided inside the flame-retardant layer, which are laid along the cable axial direction and evenly arranged along the cable circumference. The outer side of the flame-retardant layer is coated with a ceramic silicone layer, and the outer side of the ceramic silicone layer is extruded with an outer sheath; by arranging the magnesium hydroxide filler on the outer side of the steel wire armor layer, the functional layer is prevented from being damaged due to bursting, and at the same time, a plurality of braided fiber ropes are arranged in the flame-retardant layer, and a large number of braiding gaps formed inside the braided fiber ropes due to braiding can form an exhaust pressure relief channel, and water vapor can flow through the braiding gaps and finally be discharged through the two ends of the cable, so as to avoid bursting due to excessive pressure inside the cable.

Process and plant for producing methanol, the process comprising the steps of: a) providing a raw synthesis gas stream; b) water gas shifting at least a portion of the raw synthesis gas stream, thereby producing a shifted synthesis gas; c) preparing a separate hydrogen containing stream and a separate oxygen containing stream by electrolysis of a water feedstock; d) introducing at least a portion of the separate hydrogen containing stream into shifted synthesis gas, thereby producing a methanol synthesis gas; and e) converting the methanol synthesis gas into said methanol.

The invention relates to the technical field of superfine molybdenum powder preparation, in particular to a preparation device and method for low-oxygen superfine molybdenum powder. The specific preparation device comprises a sublimation bin, a reaction area and a gas-solid separation bin which are sequentially connected, the reaction zone comprises a preheating zone, a reduction zone and a conversion zone; a part of the hydrogen pipeline and a part of the carbon monoxide pipeline are arranged in the preheating area; one end of the hydrogen pipeline extends to the reduction area and is used for providing preheated hydrogen and carrying out gas-phase reduction reaction on the preheated hydrogen and the gas-phase MoO3 subjected to heat preservation; one end of the carbon monoxide pipeline extends to the conversion area and is used for providing preheated carbon monoxide and reacting with water vapor to complete primary water vapor conversion; meanwhile, partial carbon monoxide is subjected to a disproportionation reaction to generate micro carbon powder, and the micro carbon powder and water vapor are subjected to a water gas reaction to complete secondary water vapor conversion. The problem that the oxygen content of existing superfine molybdenum powder prepared through gas-phase molybdenum trioxide reduction is too high is solved.

The invention discloses an iron oxide-iron cluster catalyst for a reverse water gas shift reaction and preparation of the iron oxide-iron cluster catalyst. The catalyst is a double-site material Fe2O3-Fe4 / C of carbon-loaded iron oxide particles and iron clusters. The preparation method comprises the following steps: firstly, synthesizing an NH2-MIL-88B (Fe) material through a solvothermal method, then grinding and uniformly mixing the NH2-MIL-88B (Fe) material with KCl, feeding the mixture into a tubular furnace for high-temperature calcination, and washing after cooling to obtain the MOFs-derived double-site catalyst, namely Fe2O3-Fe4 / C. The MOFs-derived Fe2O3-Fe4 / C double-site catalyst prepared by the invention is low in cost and simple and convenient in process, and when the MOFs-derived Fe2O3-Fe4 / C double-site catalyst is applied to a low-temperature catalytic reverse water-gas shift reaction, the CO2 conversion rate and the CO space-time yield are greatly improved, and the industrial application potential is huge.

The invention discloses a system for efficiently utilizing biomass to prepare green methanol. The system comprises a biomass pyrolysis unit, a synthesis gas preparation unit, a hydrogen-carbon ratio adjusting unit and a green methanol synthesis unit, the biomass is conveyed to a biomass pyrolysis unit to be subjected to a pyrolysis reaction, then gas-solid separation is conducted, and biochar and biomass pyrolysis gas are obtained; conveying the biochar and fresh water and / or seawater to a synthesis gas preparation unit for water gas reaction to obtain synthesis gas and co-production by-products; the synthesis gas and the biomass pyrolysis gas are fed into a hydrogen-carbon ratio adjusting unit to adjust the ratio of hydrogen-carbon components in the synthesis gas and the biomass pyrolysis gas, so that the ratio meets the stoichiometric hydrogen-carbon molar ratio requirement required by the green methanol synthesis reaction; the synthesis gas and the biomass pyrolysis gas meeting the hydrogen-carbon molar ratio are conveyed to a green methanol synthesis subunit for a methanol synthesis reaction, and green methanol is obtained; in the green methanol, carbon atoms come from biomass, and hydrogen atoms come from biomass, fresh water or seawater.

A process and a plant for the production of hydrogen or for the synthesis of ammonia, said process comprising the following steps: (a) performing a reforming process (101) of a hydrocarbon feedstock (1) to generate a raw syngas (2), said reforming process comprising at least an autothermal reforming step (104) in presence of oxygen-enriched air or pure oxygen (3) produced by an air separation unit (ASU; 103); (b) subjecting said raw syngas (2) to a post-treatment (102) providing hydrogen (H2; 4), a CO2-enriched stream (5), and a residual gas (6); said post-treatment comprising at least a water gas shift conversion step (105) of said raw syngas into a shifted syngas (7), a pressure swing absorption step (106), and a cryogenic separation step (107); wherein said pressure swing absorption step produces said hydrogen and a first tail gas (8) comprising carbon monoxide (CO), carbon dioxide (CO2), residual hydrogen (H2) and unreacted hydrocarbon feedstock from the shifted syngas (7), and said cryogenic separation step separates the CO2-enriched stream and a second tail gas (9) from said first tail gas; said post-treatment (102) comprising a further separation step (120) of a CO2-containing stream (11) and of the residual gas (6) from said second tail gas; (c) recycling said residual gas (6) as feed to said reforming process and / or as fuel to one or more fired heater(s) (10) of said process; (d) optionally feeding a portion (4.8) of said hydrogen (4) obtained in step (b) as fuel to one or more fired heater(s) of said process; (e) optionally an ammonia synthesis step (110) wherein said hydrogen (4) and a nitrogen (N2)-containing stream (12) produced by said ASU (103) are reacted in a given stoichiometric ratio and in ammonia (NH3) synthesis conditions to obtain an ammonia-containing product (13).

The invention relates to a zero-emission technology for producing power in a thermal plant using natural gas (NG) or liquefied natural gas (LNG), followed by capturing carbon dioxide (CO2) and converting it into green Dimethyl Ether (DME). The process integrates a gas-based combined cycle power plant with CO2 capture through Pressure Swing Adsorption (PSA) (106) and Monoethanolamine (MEA) purification. Captured CO2 undergoes a Reverse Water Gas Shift (RWGS) (306) reaction at temperatures above 900°C to form CO, which, along with syngas from steam methane reforming (308a, 308) at 525°C to 900°C and 25 ATA pressure, is converted into DME using a Cu / ZnO / Al2O3 catalyst at 250-300°C and 25-40 ATA. The process achieves an energy efficiency factor of 93.04%, producing 92 kg of DME per 48 kg of LNG, with a 94% greenhouse gas abatement, contributing to net-zero emissions (NZE) while generating bulk thermal power.

A process for the production of hydrogen is described comprising the steps of: (i) reforming a gaseous mixture comprising a hydrocarbon and steam having a steam to carbon ratio in the range of 0.4:1 to 1.8:1, to in a reforming unit comprising an autothermal reformer to produce a reformed gas mixture, (ii) subjecting the reformed gas mixture to an isothermal water-gas shift reaction in an isothermal water-gas shift reactor using water as a heat exchange medium, thereby increasing the hydrogen content of the reformed gas mixture and producing a hydrogen-enriched reformed gas while raising steam, cooling at least some of the hydrogen-enriched reformed gas and separating condensed water therefrom to provide a de-watered hydrogen-enriched reformed gas, (iv) subjecting at least some of the de-watered hydrogen-enriched reformed gas to carbon dioxide separation by performing a reactive amine wash on the hydrogen-enriched reformed gas in a carbon dioxide separation unit to recover carbon dioxide gas and crude hydrogen gas, and (v) subjecting at least some of the crude hydrogen gas to purification in a hydrogen purification unit to produce a purified hydrogen gas and a tail gas, wherein a portion of the tail gas is recycled to the process.

The invention discloses a coal-to-methanol conversion treatment system and a coal-to-methanol conversion treatment simulation method. The coal-to-methanol conversion treatment system comprises a gas separator, a conversion furnace, a first water separation device, a stripping tower and a second water separation device. Water gas of a gasification section enters a gas separator, and a gas phase discharged from a gas outlet of the gas separator is divided into a first gas phase and a second gas phase through a flow divider; the inlet of the conversion furnace is connected with the flow divider so that the first gas phase flows into the conversion furnace; the first water separation device is used for performing multi-stage separation on the mixed gas; steam entering the stripping tower from the steam inlet is in contact with condensate entering the stripping tower from the first water separation device; and the second water separation device is connected with the gas outlet of the stripping tower to separate the vent gas and the wastewater. Water gas can be effectively treated, so that the energy consumption of the system is reduced, the water-saving and environment-friendly effects are achieved, and the purposes of improving quality and efficiency can be achieved.

A process for the production of hydrogen is described comprising the steps of: (i) subjecting a gaseous mixture comprising a hydrocarbon and steam to steam reforming in a reforming unit comprising an autothermal reformer to generate a reformed gas mixture; (ii) increasing the hydrogen content of the reformed gas mixture by subjecting it to one or more water-gas shift stages in a water-gas shift unit to provide a hydrogen-enriched reformed gas; (iii) passing the hydrogen-enriched reformed gas and an oxygen-rich gas to an oxidation unit containing an oxidation catalyst that converts carbon monoxide present in the hydrogen-enriched reformed gas to carbon dioxide, to form a carbon dioxide-enriched gas mixture; and (iv) passing the carbon dioxide-enriched gas mixture to a product separation unit to provide a hydrogen gas stream, a carbon dioxide gas stream and a by-product gas stream, wherein at least a portion of the by-product gas stream is compressed and recycled to one or more of the reforming unit, the water-gas-shift unit, the oxidation unit, and the product separation unit.

The invention discloses a U-shaped wall tubular reactor and an application method thereof. The reactor comprises a shell, the top of the shell is provided with a synthesis gas inlet, the bottom of the shell is provided with a synthesis gas outlet, the shell is internally provided with a gas distributor, a central gas collection cylinder and a water-cooling bundling pipe, and the outer side of the shell is provided with an upper annular cavity and a lower annular cavity; the gas distributor is arranged in the synthesis gas inlet, the central gas collection cylinder is arranged at the central part of the shell, and the water-cooling bundling pipe is arranged on the outer side of the central gas collection cylinder and consists of a plurality of U-shaped heat exchange pipes; the upper ends of all the U-shaped heat exchange tubes penetrate through the upper tube plate to be communicated with the upper annular cavity, the lower ends of all the U-shaped heat exchange tubes penetrate through the lower tube plate to be communicated with the lower annular cavity, and the upper tube plate and the lower tube plate are both arranged on the side wall of the shell. The welding seam of the heat exchange tube is not in contact with process gas, so that the corrosion problem is thoroughly solved; no internal part structure is arranged in the shell, so that the uniform distribution of reaction gas in a catalyst bed layer is improved, and the ammonia synthesis efficiency is improved. The reactor can be used for fixed bed ammonia synthesis reaction or water gas shift reaction.

Disclosed are routes for producing liquid hydrocarbon products containing gasoline and / or diesel boiling range hydrocarbons, and optionally renewable products containing non-petroleum derived carbon. In a typical process, a gaseous feed mixture containing a combination of CO 2 and H 2 and / or CH 4 (or other hydrocarbon sources of H 2 ) is converted by a reforming and / or reverse water gas shift (RWGS) reaction optionally used in combination with Fischer-Tropsch (FT) synthesis and / or cracking. Preferred gaseous feed mixtures are biogas or mixtures of CO 2 and H 2 that are not easily upgraded in conventional processes. The catalysts described herein have high activity to catalyze the reforming (including dry reforming) of CH 4 and other light hydrocarbons (e.g., those produced by FT synthesis and recycled to the process as light fractions) and simultaneously catalyze the RWGS reaction. These attributes provide flexibility with respect to compositions that can be efficiently converted. Optionally, the use of an electrically heated reforming reactor in the first reforming stage or initial reforming stage or RWGS stage can improve the economics of small-scale operation.

The invention provides a coral reef-shaped bifunctional catalyst for preparing green hydrogen through biomass gasification and synchronously decarbonizing and a preparation method of the coral reef-shaped bifunctional catalyst, and belongs to the field of biomass high-value utilization. The activity and the stability of the catalyst are improved by regulating and controlling the mutual matching of the active phase and the carrier through the falling position of the active metal; the coral reef-shaped bifunctional catalyst is directionally constructed, and a confinement environment required by bond breaking and CO2 conversion is provided by utilizing the unique spatial configuration of the carrier. The catalyst utilizes a green hydrogen production active center to directionally break bonds in a thermochemical conversion process, so that the content of green hydrogen in synthesis gas is increased; cO2 in the synthesis gas is absorbed and converted by using a decarburization active center, and the content of CO2 at an outlet of the reactor is reduced. The bifunctional catalyst prepared by the invention has relatively high activity and cycling stability, two reaction processes (bond breaking, decarbonylation and water gas shift reaction) are coupled to realize preparation of high-H2 / CO (3.84) synthesis gas through biomass thermochemical conversion, and the application prospect is wide.

The application relates to the technical field of catalyst preparation, in particular to an in-situ formed FeO x / Fe3C catalyst as well as a preparation method and application thereof. The FeO x / Fe3C catalyst provided by the application is a heterogeneous composite structure composed of surface iron oxide (FeO x ) and bulk iron carbide (Fe3C), breaks through the limitation of only focusing on a single phase, systematically reveals the dynamic structure evolution law from the surface to the bulk, and clarifies the internal correlation with the reaction mechanism. Based on the synergistic circulation mechanism from the surface to the bulk, the FeO x / Fe3C catalyst exhibits excellent catalytic performance and stability in the reverse water gas shift reaction, which is superior to most of the catalyst systems reported at present.

A system and method for producing methanol and synthetic fuels from waste acid gas streams using a plasma reactor is described in this disclosure. An acid gas stream comprising primarily of H2S and CO2 is fed into a plasma reactor. H2S is converted into H2 and sulfur. Simultaneously, CO is formed by the reverse water gas shift reaction. H2 and CO form a syngas stream. The unreacted H2S is captured in a tail gas treatment unit and recycled back to the plasma reactor. A partial CO2 capture unit is placed downstream of the tail gas treatment unit which is primarily used to adjust the ratio of H2 and CO in the syngas stream to 2-3 for methanol production and 2 for fuel production.

The invention provides a vacuum radiation water gas-phase drying method, and belongs to the technical field of vacuum radiation water gas-phase drying. According to the vacuum radiation water gas-phase drying method, before water gas is adopted for drying, a tank body is preheated through radiation in advance, and the temperature difference between the tank body and a to-be-detected component is reduced; and according to conversion parameters among the water vapor, the pressure, the temperature and the radiation power in the tank body in the drying process of the water vapor, the corresponding radiation power and the air intake are adjusted. Firstly, by collecting the vacuum degree and the initial temperature of a tank body, the initial power gain value of a radiant panel is calculated for preheating; after the preheating temperature inflection point is reached, the system establishes an air inlet valve opening degree adjusting function by monitoring the temperature difference value of an iron core and a winding, and the water vapor concentration is calculated in combination with the pressure change rate. A positive active adjustment value is determined through the corresponding relation between the environment temperature and the water vapor concentration, meanwhile, a negative passive adjustment value is calculated based on the surface temperature and the water content, and a two-way control mechanism is formed. The system achieves automatic control of the process by comparing the negative passive adjustment value with a preset drying threshold value, and finally the purpose of uniform drying is achieved. The technical problems that in an existing vacuum radiation drying technology, long drying time is needed for achieving thorough drying, and rusting is caused are solved.