276 results about "Partial oxidation" patented technology

Chemical recycling facilities for processing mixed plastic waste are provided herein. Such facilities have the capability of processing mixed plastic waste streams and utilize a variety of recycling facilities, such as, for example, solvolysis facility, a pyrolysis facility, a cracker facility, a partial oxidation gasification facility, an energy generation / energy production facility, and a solidification facility. Streams from one or more of these individual facilities may be used as feed to one or more of the other facilities, thereby maximizing recovery of valuable chemical components and minimizing unusable waste streams.

The invention relates to a self-heating catalysis propane partial oxidation reforming coupling tube type solid oxide fuel cell system and a preparation method of a catalyst and a carrier thereof. The system comprises a fuel cell tube and a honeycomb type catalyst carrier with the catalyst, the fuel cell tube comprises a cathode layer, an electrolyte tube and an anode layer; the anode layer is located on the inner wall of the electrolyte tube, and the cathode layer is located on the outer wall of the electrolyte tube; the honeycomb type catalyst carrier is mounted at a gas inlet end of a fuel cell tube and is communicated with an inner cavity of the fuel cell tube, the catalyst is a ruthenium-based active component, comprises RuO or metal Ru and is doped with CeO as a dispersing aid, the loading capacity of Ru is 0.5-5wt%, and the proportion of CeO is 0.5-3wt%. The method has the advantages that the mechanical stability is good, the influence of the anode reduction process on the starting time is eliminated, the influence of anode carbon deposition on the performance of the SOFC is reduced, and rapid heating and rapid power generation are realized.

The invention discloses a vanadium oxide-based supported platinum catalyst and a preparation method and application thereof, and the preparation method comprises the following steps: a) carrying out high-temperature heat treatment on a V precursor to obtain orange V2O5 carrier powder; b) adding V2O5 powder, a Pt metal precursor and a sacrificial reagent into the solution, carrying out ultrasonic treatment, stirring, and reacting under the irradiation of a xenon lamp to obtain a dark brown suspension; c) centrifuging, washing, drying, grinding and roasting the dark brown suspension to obtain dark brown powder; and d) carrying out three times of high-temperature heat treatment on the dark brown powder under different protective gases, and sequentially carrying out three processes of oxidation, reduction and partial oxidation to obtain the vanadium oxide-based platinum-loaded catalyst. The catalyst prepared according to the invention is applied to a carbon monoxide oxidation reaction, and has the advantages of excellent catalytic performance, long-time stability and good recycling stability at a high space velocity.

The invention discloses a system for preparing acetylene by partial oxidation of natural gas, which comprises a natural gas preheating furnace, an oxygen preheating furnace and an acetylene furnace, both the natural gas preheating furnace and the oxygen preheating furnace are communicated with the acetylene furnace, the acetylene furnace is communicated with a quenching water inlet pipe, and a pyrolysis gas outlet of the acetylene furnace is directly connected with a YT membrane dust remover. According to the scheme, the problems that in the prior art, a carbon black water system is large in carbon black removal difficulty and high in carbon black post-treatment cost, VOCs and carbon black floating influence the environment when carbon black is removed through an open-type carbon black water tank, waste heat of the system is difficult to utilize, and wet carbon black adheres to the inner wall of a pyrolysis gas pipeline and blocks the pipeline are solved.

The invention belongs to the technical field of metallurgy, and relates to a carbon reduction method for a direct reduction device, which comprises the following steps: step 1, feeding a carbon-containing raw material and an oxidant into a conversion unit for oxidation reaction to obtain crude synthesis gas; 2, feeding the crude synthesis gas into a direct reduction unit for ironmaking, and respectively feeding furnace top gas discharged by the direct reduction unit into a conversion unit and a tail gas discharge unit after dust removal by a dust removal unit; 3, a part of the furnace top gas and a carbon-containing raw material are subjected to a reforming reaction in a conversion unit to obtain synthesis gas, and the synthesis gas is fed into a direct reduction unit for ironmaking; and the other part of furnace top gas is discharged after being treated by the tail gas discharge unit. According to the method, a carbon dioxide closed-loop conversion system is constructed, efficient carbon reduction is achieved through a coupling mechanism of non-catalytic partial oxidation and autothermal reforming, and compared with a traditional hydrogen-based shaft furnace ironmaking method, the carbon reduction method has the advantage that the carbon dioxide emission is reduced by at least 25%.

The invention relates to an oxidation reactor for partial oxidation of a feed stream with an oxygen-containing oxidant stream to give a hydrogen-containing product stream. This partial oxidation may be conducted as a noncatalytic partial oxidation (POX) or as an autothermal reforming (ATR). Useful feed streams here include hydrocarbonaceous streams, but also ammonia-containing streams. According to the invention, the oxidation reactor is equipped with multiple cooling zones surrounding the reactor shell. As a result, operation of the oxidation reactor can continue if, for example, merely an inspection or repair at a particular point in the reactor shell is required. Operation of the oxidation reactor can continue over the duration of the inspection or repair measures, such that production shutdowns are avoided.

Methods and systems are provided for the conversion of waste plastics into various useful downstream recycle-content products. More particularly, the present system and method involves pyrolyzing one or more waste plastics into various pyrolysis products, including a carbon solids-containing pyrolysis residue, and then subjecting the pyrolysis residue to partial oxidation gasification to thereby form a syngas composition.

The invention discloses a method for in-situ growth of a Ti3C2Tx-titanium dioxide heterogeneous interface material and application, and belongs to the technical field of two-dimensional composite materials and gas sensors, a hydrochloric acid solution of a fluorine-containing compound is used as an etching solvent, a hydrothermal method is adopted to etch Ti3AlC2 to prepare the Ti3C2Tx material (Tx =-F,-OH and-O), and the Ti3C2Tx-titanium dioxide heterogeneous interface material is prepared through a hydrothermal method. The Ti3C2Tx material is subjected to oxygen microwave plasma treatment under low power, meanwhile, the volume fraction of oxygen is controlled to range from 10% to 30%, the Ti3C2Tx material can be partially oxidized into two-dimensional flaky TiO2 oxide, the two-dimensional flaky TiO2 oxide tightly wraps the surface of Ti3C2Tx, and the Ti3C2Tx-TiO2 heterogeneous interface material is formed. The gas sensor prepared from the Ti3C2Tx-TiO2 heterogeneous interface material has very good responsiveness and selectivity to hydrogen gas.

The invention belongs to the technical field of industrial flue gas purification, and particularly relates to a system and a method for synergistically purifying NOx and CO in low-temperature flue gas. On the basis of the problem that the oxidation reaction of NO and CO is easily and remarkably inhibited by SO2 and H2O in flue gas, the core-shell catalyst is designed for a denitration system, NO / CO co-oxidation in a complex atmosphere is achieved, and the low-temperature denitration efficiency is improved by partially oxidizing NO into NO2 and initiating a rapid SCR reaction; meanwhile, NO / CO co-oxidation heat release is used for increasing the temperature of flue gas at an SCR inlet, and energy self-supply of a denitration system is improved. On the whole, low-temperature efficient denitration and CO pollution control are both considered through flue gas component conditioning and temperature adjustment, and collaborative purification of NOx and CO in low-temperature flue gas is achieved.

The invention discloses a solid oxide electrolytic cell, a solid oxide electrolytic reactor and a method and system for preparing ammonia and fuel by using the solid oxide electrolytic cell and the solid oxide electrolytic reactor. The solid oxide electrolytic cell comprises an anode, an electrolyte and a cathode, the cathode inputs mixed gas composed of air or nitrogen and water vapor, electrochemical deoxidation reaction is carried out, and ammonia feed gas containing hydrogen and nitrogen is generated; the anode inputs mixed gas composed of combustible gas, water vapor and / or carbon dioxide, the mixed gas and oxygen ions transmitted from the cathode to the anode are subjected to partial oxidation reaction, and synthesis gas containing hydrogen, carbon monoxide and carbon dioxide is generated. The solid oxide electrolysis reactor comprises an anode end plate, an intermediate plate assembly and a cathode end plate which are connected in sequence; the intermediate plate assembly includes a number of repeating units. The electrolytic deoxidation reaction and the partial oxidation reaction of the combustible gas are coupled, so that the electrolytic power consumption is greatly reduced, the low-cost green preparation of the raw material gas for synthesizing ammonia and synthetic fuel is realized, and the production cost of green ammonia and green synthetic fuel is further reduced.

The utility model relates to a device for measuring a reforming catalyst for partial oxidation of ammonia gas. The device comprises a porous main body with a catalyst, a sealing cover, a tail gas outlet, a gas cavity, an ammonia gas and air mixed gas inlet and a heating device, the porous main body is mounted in the reaction cavity; the tail gas outlet is detachably mounted at the lower part of the reaction cavity and is communicated with the reaction cavity; the sealing cover detachably covers the upper part of the reaction cavity; the ammonia and air mixed gas inlet is communicated with the gas cavity, the reaction cavity is mounted in the gas cavity, and the gas inlet hole group is communicated with the gas cavity; a heating device is located in the porous body. The device has the advantages of being simple in structure and easy to disassemble and clean; the device can be repeatedly used, and different catalysts can be conveniently tested.

The present invention relates to a heterogeneous photocatalyst system for partial oxidation of C1-C2 alkanes into value added products, comprising visible-light active semiconductor material (M1VO4) assembled and integrated onto a mesoporous metal oxide supported onto support, wherein said M1 has different or interchangeable mixed oxidation states. Further, the present invention relates to a process of preparation of said heterogeneous photocatalyst system by doctor blade method for preparation of mesoporous metal oxide supported onto support, followed by SILAR method for assembling and integrating visible-light active semiconductor material (M1VO4). Furthermore, the present invention relates to a process for conversion of lower alkane (e.g. C1-C2, and a mixture thereof) into value added products by reacting saturated aqueous alkane solution in presence of said heterogeneous photocatalyst system and simulated solar light condition or direct sunlight in a photoreactor.

This invention belongs to the field of microwave absorbing material preparation technology, and discloses a two-step partial oxidation method to improve the microwave absorption performance of MXene materials. By performing hydrothermal pre-oxidation and heat treatment on MXene materials, oxide nanoparticles are grown in situ on their surface, achieving controllable partial oxidation. The MXene matrix retains a two-dimensional layered structure, and a heterogeneous interface is formed between the oxide nanoparticles and the MXene matrix. This adjusts the conductivity, optimizes impedance matching, enhances interface polarization, improves microwave absorption performance, and provides high-temperature stability.

A process for producing hydrogen comprising the steps of reforming a hydrocarbon feedstock to form a synthesis gas; subjecting the synthesis gas to one or more stages of water gas shift to convert carbon monoxide to carbon dioxide and form a hydrogen-enriched synthesis gas; and treating the hydrogen-enriched synthesis gas to form a purified hydrogen product and tail gas stream containing methane, wherein at least a portion of the tail gas stream is treated by subjecting it to partial oxidation or autothermal reforming to form a partially-oxidised or reformed tail gas, followed by of water gas shift of the partially-oxidised or reformed tail gas to form a hydrogen-enriched tail gas, and a step of carbon dioxide removal from the hydrogen-enriched tail gas to form a hydrogen stream and a carbon dioxide stream, wherein the carbon dioxide stream is recovered and a portion of the hydrogen stream is a fuel.

Disclosed are dimeric copper centers supported on graphitic carbon nitride (denoted herein as Cu2@C3N4) and their use as advanced catalysts for partial oxidation of CH4.

Aspects of the invention are associated with the discovery of approaches for the conversion of carbonaceous feeds, such as biomass and biomass-containing solids via thermal treatment. Particular examples of biomass-containing solids are municipal solid waste (MSW), as well as waste plastics and waste tires. In some cases, this conversion, such as by pyrolysis, will allow for straightforward integration with gasification (e.g., entrained-flow gasification) or partial oxidation. Advantageously, processes and associated apparatuses / equipment described herein are tailored to the physical and chemical properties of the feeds. In this regard, important advantages reside in auger reactors that include electric heating elements within one or more auger shafts. Such centralized heating may be used in combination with external heating, for example also utilizing electric heaters. With centralized heating, the surface area available for heat transfer into the feedstock may be increased dramatically (e.g., by a factor of 3 to 5).

The utility model relates to the technical field of methanol hydrogen production, and provides a methanol partial oxidation hydrogen production device. The methanol partial oxidation hydrogen production device comprises a reaction part and a water storage part, the reaction part is provided with a reaction part main body, a reaction raw material inlet and a reaction gas outlet which are in fluid communication, and the water storage part is provided with a water storage part main body, a desalted water inlet and a steam outlet which are in fluid communication. Wherein the reaction part is not communicated with the fluid of the water storage part, and the main body of the reaction part and the main body of the water storage part are adjacent to each other through a wall surface. According to the utility model, the reaction part and the water storage part directly exchange heat through the wall surface, so that over-high speed and over-high temperature of partial oxidation reaction in the reaction part are prevented, the damage to a catalyst in the reaction part is avoided, and the service life of the catalyst is prolonged.

The invention discloses a fuel rod cladding oxidation film detection device calibration method and a calibration sample, and belongs to the field of film detection. The method comprises the following steps that an accelerated oxide layer is deposited on a sample substrate through a physical vapor deposition technology to obtain a calibration sample prefabricated part, the accelerated oxide layer comprises cladding components and doping components, the cladding components are the same as matrix components of a fuel rod cladding to be detected, and the doping components comprise one or more of N, C and Al; performing oxidation treatment on the calibration sample prefabricated member to oxidize at least part of the accelerated oxide layer into a simulated oxide layer to obtain a calibration sample; and providing a plurality of calibration samples with simulated oxide layers with different thicknesses, and calibrating the eddy current detection device. The method can effectively improve the calibration efficiency and accuracy of the eddy current detection device, and improve the detection precision of the fuel rod cladding surface oxide film thickness.

The invention provides a method and system for preparing synthesis gas through dry reforming parallel non-catalytic partial oxidation, and the method comprises the following steps: carrying out pretreatment operation on raw material gas to obtain pretreated raw material gas, dividing the pretreated raw material gas into two branches, introducing the first branch into a dry reforming self-heating furnace, and introducing the second branch into a dry reforming self-heating furnace; the second branch is mixed with steam and then is introduced into a non-catalytic partial oxidation converter; introducing oxygen and carbon dioxide into a dry reforming reactor, and carrying out a methane dry reforming reaction with the pretreated raw material gas in the presence of a catalyst to obtain first crude synthesis gas; introducing oxygen into the non-catalytic partial oxidation converter, and carrying out methane non-catalytic partial oxidation reaction on the oxygen and the raw material gas to obtain second crude synthesis gas; the first crude synthesis gas and the second crude synthesis gas respectively enter a first waste heat boiler and a second waste heat boiler for heat exchange operation, and after heat recovery, the first crude synthesis gas and the second crude synthesis gas are mixed to obtain mixed crude synthesis gas; and after the mixed crude synthesis gas is subjected to heat exchange operation and refining operation in sequence, the downstream required synthesis gas is finally obtained. The hydrogen-carbon ratio of the synthesis gas can be adjusted in a wide range, the utilization rate of the feed gas is high, and carbon dioxide and heat energy can be fully absorbed.

The invention discloses an efficient carbon ash dissociation method for stone coal vanadium ore acid leaching vanadium tailings, which comprises the following steps: 1) pulping: mixing the stone coal vanadium ore acid leaching vanadium tailings, an additive and water for pulping to obtain mixed slurry; (2) the mixed slurry is subjected to ore grinding treatment, and ore grinding pulp is obtained; according to the method, the stone coal vanadium ore acid leaching vanadium tailings are subjected to ore grinding under the additive system with the specific combination and proportion, and the dissociation performance of the stone coal vanadium ore acid leaching vanadium tailings is synergistically improved; meanwhile, aiming at the characteristic that the coal surface of the stone coal is partially oxidized, a flotation reagent composed of a traditional collecting agent, composite oleic acid and octanol is adopted, the collecting capacity is effectively improved, the reagent is saved, higher carbon and ash flotation separation selectivity can be obtained, and obtained carbon-rich concentrate can be used as blending combustion coal; the obtained high-ash tailings can be used for preparing Portland cement, baking-free bricks and other building materials after being dehydrated, resource utilization of the stone coal vanadium ore acid leaching vanadium tailings is achieved, and the method has good application and popularization value.

A method for transient operation, such as start-up or shut-down, of a burner of a partial oxidation reactor in which, under normal conditions, the burner is operated using a carbon-containing gaseous fuel and the fuel is combusted in the presence of oxygen in a combustion chamber, in which the method comprises replacing the fuel with hydrogen during transient operation, therefore, the formation of smoke dust is reduced.

The invention provides a method for resource utilization of iodine-containing organic waste and recovery of iodine, and belongs to the technical field of waste resource utilization. The method comprises the following steps: gasifying the iodine-containing organic waste at a high temperature of 1100-1750 DEG C in a pure oxygen atmosphere, and carrying out partial oxidation reaction, namely incomplete combustion, on the iodine-containing organic waste by controlling the oxygen amount to generate crude synthesis gas with H2, CO, CO2, H2O and HI as main components; the obtained crude synthesis gas is washed with water, HI is converted into a solution containing-1 valence iodide ions, then the iodide ions are further converted into iodized salt, recovery of iodine in the iodine-containing organic waste is achieved, and the difficulty and cost of the iodine recovery process are reduced; and in the high-temperature gasification process of 1100-1750 DEG C, hydrocarbon elements in the iodine-containing organic waste are converted into synthesis gas mainly comprising H2 and CO, so that resource utilization of the hydrocarbon elements can be realized, and secondary pollution cannot be caused.

A chemical plant comprising an off-gas treatment unit, OUT, arranged to accept a hydrocarbon-containing fuel stream comprising hydrocarbons, steam, and hydrogen. The OTU comprises: (i) hydrogen membrane separation unit 102 arranged to accept hydrocarbon containing fuel stream 101 and produce permeate stream 104 and retentate stream 103; (ii) a reforming section comprising a partial oxidation reactor or an autothermal reformer 108, arranged to accept the retentate stream and produce reformed gas stream 109; (iii) water-gas shift section 110 arranged to accept said reformed gas stream and produce shifted gas stream 111; and (iv) carbon dioxide removal section 116 arranged to accept said shifted gas stream and produce CO2 rich stream 117 and hydrogen product stream 118. The permeate stream and / or the hydrogen product stream is used as a low carbon fuel. A method for converting a hydrocarbon-containing fuel stream into a low carbon fuel in such an off-gas treatment unit is also described. A retrofitting method for a chemical plant, in which an off-gas treatment unit as described is installed is also disclosed.

An electrochemical process and apparatus for producing hydrogen and a dehydrogenated product from partial oxidation of an alcohol. The hydrogen may be utilised in a hydrogen fuel cell to generated electricity, e.g., to power a vehicle.

Disclosed is methodology for controlling the H2:CO ratio of the product produced in a partial oxidation reactor, by adjusting the properties of the product formed in the partial oxidation.

The invention discloses a self-distribution type long-life burner, and aims to prepare synthesis gas by partial oxidation of hydrocarbon fuel in the field of coal chemical industry. According to the combustor, the gasification efficiency and the combustion uniformity are improved by optimizing material distribution and the spraying angle. The burner is provided with more than three raw material outlets used for oxygen, nitrogen, water vapor (a first medium), coal water slurry, fluidized coal powder, natural gas, fuel oil, steam (a second medium), waste fuel gas, purge gas, fuel oil, sludge and waste water (a third medium). The outermost channel is specially designed for the second medium or the third medium so as to optimize the spraying angle and material distribution. A shunting and distribution control mechanism is arranged in the necking device, and the necking device comprises a necking original piece made of high-temperature-resistant and corrosion-resistant materials. In addition, the combustor is further provided with a cooling channel used for reducing the working temperature, and the service life of the combustor is prolonged. The combustor can adapt to various working conditions, the gasification efficiency and the stability of product quality are improved, and the requirements of a reaction device for the combustor with high performance, flexible feeding and long service life are met.

The invention relates to an oxidation reactor for partial oxidation of a feed stream with an oxygen-containing oxidant stream to give a hydrogen-containing product stream. This partial oxidation may be conducted as a noncatalytic partial oxidation (POX) or as an autothermal reforming (ATR). Useful feed streams here include hydrocarbonaceous streams, but also ammonia-containing streams. According to the invention, the inlet region of the oxidation reactor is configured as a combination of a dome-shaped region with a (frusto) conical region, where the (frusto) conical inlet region merges into the cylindrical section of the oxidation reactor.

The invention relates to fluorocarbon chain modified cobalt nickel-aluminum hydrotalcite and a preparation method and application thereof, ions in the cobalt nickel-aluminum hydrotalcite are Co < 2 + >, Ni < 2 + > and Al < 3 + > respectively, and a fluorocarbon chain is prepared from at least one compound in formulas (I)-(III); comprising the following steps: S1, stirring and mixing a Co < 2 + > aqueous solution, a Ni < 2 + > aqueous solution, an Al < 3 + > aqueous solution and a urea aqueous solution in an inert gas atmosphere, then carrying out a hydrothermal reaction, and after the reaction is finished, carrying out post-treatment to obtain cobalt nickel-aluminum hydrotalcite; and S2, dispersing the cobalt nickel-aluminum hydrotalcite in anhydrous toluene, reacting the cobalt nickel-aluminum hydrotalcite with at least one compound in formulas (I)-(III) under the action of triethylamine in an inert gas atmosphere, and after the reaction is finished, performing post-treatment to obtain fluorocarbon chain modified cobalt nickel-aluminum hydrotalcite, the hydrotalcite is applied to preparation of naphthenic alcohol and naphthenic ketone by catalyzing partial oxidation of naphthenic hydrocarbon. The method has the advantages of high selectivity, high product yield, low content of naphthenic hydroperoxide in the reaction process, and high operation safety.

The invention relates to a method for producing acrylic acid, wherein: a product gas mixture containing acrylic acid, water vapor and secondary components is produced by means of a heterogeneously catalyzed gas-phase partial-oxidation of at least one C3 precursor of acrylic acid with molecular oxygen on catalysts in a solid aggregate state at an increased temperature; the product gas mixture is then conducted into a condensation column equipped with fittings which have a separating effect; the product gas mixture is allowed to rise within the condensation column and in the process fractionally condenses, wherein the product gas mixture is separated into: a sump liquid containing secondary products, which are heavier-boiling than acrylic acid, and secondary components, a raw acrylic acid, which contains water and secondary components in an overall depleted state, as the target product, an acidic water also containing acrylic acid and secondary components, and a residual gas mixture containing secondary components which are lower-boiling than water; the target product is conveyed out of the condensation column via a side draw, and the side draw is above the point where the product gas mixture is fed into the condensation column; and the fittings which have a separating effect consist of different stainless steels, and fittings which have a separating effect and consist of a first stainless steel comprising at least 18 wt.% nickel are used in first regions of the condensation column in which the product gas mixture has 5 to 70 wt.% water, 15 to 85 wt.% acrylic acid, at least 8 wt.% acetic acid and at least 2 wt.% formic acid.