187 results about "Partial oxidation" patented technology

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.

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 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.

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.

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 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.

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 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 belongs to the technical field of cracking conversion reaction catalysts, and discloses a high-temperature raw gas direct cracking conversion catalyst and a preparation method thereof. The catalyst comprises a main active component, a co-catalytic component, a capacity expanding agent and an adhesive, raw materials of the main active component comprise industrial waste residues and natural ore; the industrial waste residue is pyrite oxidation roasting slag and / or steel slag, and the natural ore is at least one of dolomite ash, olivine and zeolite; the co-catalysis component comprises a first co-catalysis component and a second co-catalysis component; the first co-catalysis component is an oxide of a group VI B element and / or an oxide of a group VIII element; and the second co-catalysis component is an oxide of a group II A element and / or an oxide of a lanthanide element. The catalyst disclosed by the invention not only has high sulfur resistance, but also has the advantages of high stability, high temperature resistance, good catalytic activity and the like, and a multi-path reaction system of steam reforming, partial oxidation, catalytic cracking and numerous balanced reactions is constructed.

The present invention relates to AB2O4 type mixed metal oxide catalyst system having spinel / inverse spinel structure with support. The present invention also relates to the process for preparation of mixed metal oxide catalyst system. More particularly, the present invention relates to a process for the partial oxidation of alkanes to value added products and corresponding oxygenates by using said AB2O4 type mixed metal oxide catalyst with support(s).

The present invention relates to AB2O4 type mixed metal oxide catalyst system having spinel / inverse spinel structure with support. The present invention also relates to the process for preparation of mixed metal oxide catalyst system. More particularly, the present invention relates to a process for the partial oxidation of alkanes to value added products and corresponding oxygenates by using said AB2O4 type mixed metal oxide catalyst with support(s).

Embodiments of the present invention provide a device for torrefaction of a raw material, such as a biomass. The device includes a rotating cylinder with a number of baffles and stiffener to rotate and stir the raw material, performing torrefaction in partially oxidative atmosphere. The torrefaction process takes part inside the long multiple reactors of a rotary drum, that the timing of the material to be fed is not particularly dependent on the timing or instances of outputting of torrefied material, because some of the reactors maytorrefy the material (e.g., 6 out of 8), while some of the last reactors may cool down the torrefied material (e.g., 2 out of 8), ensuring continuous process.

The invention discloses a catalyst combination method for simultaneously removing CO and NOx in flue gas, which is characterized in that two reaction systems are arranged in a flue gas purification device, the flue gas enters the flue gas purification device, ammonia spraying operation is carried out, oxidation reaction is carried out on the upper layer of the flue gas purification device, and CO in the flue gas is oxidized into CO2 and part of NO is oxidized into NO2 under the catalytic action of an oxidation catalyst Co1-xNix / Al2O3; according to the method, CO and NOx in the flue gas are removed at the same time, NH3-SCR reaction is carried out on the lower layer of the flue gas purification device, and under the catalytic action of a NOx selective reduction catalyst, blown ammonia gas and NOx in the flue gas are converted into N2 and H2O, so that CO and NOx in the flue gas are removed at the same time. The flue gas purification device is utilized to realize efficient and synergistic removal of CO and NOx, and has the characteristics of high efficiency, simple catalyst preparation, convenience in engineering application and the like.

Process and plant for the production of ammonia and urea which use as feedstock a gaseous mixture deriving from various industrial processes, in particular metallurgical iron ore reduction processes. The process produces a loop that uses the short contact time catalytic partial oxidation (SCT-CPO) reaction to convert purge gases of the ammonia synthesis to synthesis gas which is combined with the feedstock to be treated. The oxygen for the partial oxidation reaction is obtained by electrolysis of water or through air separation. The CO2 contained in the feedstock and / or emitted in the process steps is used for the production of urea.

Electrical power derived from a renewable energy source is used to perform electrolysis of water to produce oxygen and hydrogen. A feed stream includes consumer waste plastics, a waste stream from a hydrocarbon refinery, or both. The feed stream is partially oxidized to produce syngas. At least a portion of the carbon monoxide of the syngas is reacted with water to produce additional carbon dioxide and hydrogen. A hydrocarbon feed stream is hydroprocessed using at least a portion of the hydrogen generated by electrolysis and at least a portion of the hydrogen from the syngas to produce a hydroprocessing product stream including a saturated hydrocarbon. At least a portion of the carbon dioxide of the syngas is hydrogenated using at least a portion of the hydrogen generated by electrolysis to produce a product stream including a hydrocarbon, an oxygenate, or both.

A hydrogen extraction catalyst based on the partial oxidation of ammonia, a method for producing the same, and a hydrogen extraction method using the above catalyst are disclosed. The hydrogen extraction catalyst based on the partial oxidation of ammonia comprises a support and ruthenium (Ru) supported on the support, and the hydrogen extraction method using the above catalyst maintains a high internal temperature of the reactor without an external heat source, solves the problem of reduced thermal efficiency due to long reaction times, and yields a high ammonia conversion rate.

A non-transitory, processor readable medium stores instructions that, when executed by a processor, causes the processor to receive (1) an indication of a feed gas flow rate measured between a feed gas source and an internal combustion engine (ICE) and (2) an indication of an oxygen enriched air flow rate measured between an air separation unit (ASU) and the ICE. A measured equivalence ratio is determined based on a feed gas composition, the feed gas flow rate, and the oxygen enriched air flow rate. The instructions further cause the processor to generate at least one of a first signal to cause a change in revolution speed of the ICE, a second signal to cause a first flow control device to modify the feed gas flow rate, or a third signal to cause a second flow control device to modify the oxygen enriched air flow rate.

The invention relates to a reactor, in particular an entrained-flow gasifier, for producing synthesis gas by partial oxidation of a carbonaceous feedstock. The reactor includes a reaction space, a cooling space, and a gas channel fluidly connecting the reaction space and the cooling space. The gas channel has a gas inlet region adjacent the reaction space and a gas outlet region adjacent the cooling space. The cooling medium is supplied through the gas channel. According to the invention, in the direction of flow of the syngas to be cooled, the gas channel has a first region and a second region connected thereto, the first region having a constant diameter and the second region having a diameter that expands in the direction of flow of the syngas to be cooled.

The application provides a method for preparing hydrogen by methane chemical looping. The method comprises: contacting methane with a first oxygen carrier to perform a first reaction to prepare syngas and a reduced first oxygen carrier; wherein the first oxygen carrier is selected from an oxygen carrier with a chemical formula of Fe 0.2 Ni 0.2 Mn 0.2 Cu 0.2 Co 0.2 Al2O4; the syngas obtained by the first reaction is contacted with a second oxygen carrier to perform a second reaction to prepare CO2 and a reduced second oxygen carrier; wherein the second oxygen carrier is selected from an oxygen carrier with a chemical formula of LaAl 1 / 4 Co 1 / 4 Mn 1 / 4 Fe 1 / 4O3; the reduced second oxygen carrier is contacted with water vapor to perform a third reaction to prepare hydrogen and a partially oxidized second oxygen carrier; the partially oxidized second oxygen carrier is subjected to a complete oxidation reaction to obtain a second oxygen carrier, and the second oxygen carrier is recycled for the second reaction.

The application discloses a kind of coal-bed gas low-temperature oxidation preparation methanol molecular sieve imidazole skeleton material catalyst and its preparation method and application, catalyst includes carrier and active component loaded on carrier, the carrier is the ZIF-8 molecular sieve imidazole skeleton material prepared with 2-methylimidazole as carbon source and nitrogen source, the active component is copper and noble metal, and noble metal is selected from any one or two or more mixtures of palladium, platinum, ruthenium.The application of catalyst in coal-bed gas partial oxidation preparation methanol, can achieve that methanol yield is as high as 18mmol·g cat ‑1 , methanol selectivity reaches 97%, service life is greater than or equal to 120h, meets the industrialization requirement of low concentration coal-bed gas partial oxidation preparation methanol, with good extensive industrialization prospect.

Chemical recycling facilities for processing mixed waste plastic 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 recovery 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.

Densified textile aggregates are co-fed with a fuel into a partial oxidation gasifier. High solids concentrations in the feedstock composition can be obtained without significant impact on the feedstock composition stability and pumpability. A consistent quality of syngas can be continuously produced, including generation of carbon dioxide and a carbon monoxide / hydrogen ratio while stably operating the gasifier and avoiding the high tar generation of fluidized bed or fixed bed waste gasifiers and without impacting the operations of the gasifier. The syngas quality, composition, and throughput are suitable for produce a wide range of chemicals.

Systems and systems to generate clean energy and for providing hydrogen capture and carbon capture sequestration are provided. Heat from partial oxidation of hydrocarbon fuel is used to generate clean power via one or more heat engines together with hydrogen capture and carbon capture sequestration.

The present invention provides a rotary kiln system and method for reducing iron oxide with hydrogen. The feed end and discharge end of the rotary kiln body are connected to the feed system and the discharge system, respectively. A waste heat recovery flue gas purification system and a preheating system are also provided between the discharge system and the feed system for heat recovery. The rotary kiln body is also connected to a hydrogen supply system and an electric heating system. The present invention adds equidistantly distributed air vents to the kiln body and adopts electric heating to inject hydrogen into the kiln body. The hydrogen injection causes the material to form a suspension, allowing a full chemical reaction between hydrogen and iron oxide. The temperature and hydrogen flow rate of the preheating zone and the metallizing zone are controlled in the direction of the rotary kiln body to realize the production process of reducing iron oxide with hydrogen. In the preheating zone, most of the iron oxide is reduced to ferrous oxide, and in the metallizing zone, the ferrous oxide is finally reduced to metallic iron. This achieves efficient reduction of iron and effectively improves the metallization rate of direct reduced iron.