229 results about "Carbon oxide" patented technology

The invention relates to the field of carbon-based catalyst preparation, and discloses a preparation method of a carbon oxide catalyst, the prepared catalyst and a method for electrochemically preparing hydrogen peroxide, the method comprises the following steps: (1) mixing a carbon black material with a peroxide solution, and carrying out ultrasonic dispersion to obtain a mixed solution; (2) heating the mixed solution in the step (1) in a protective atmosphere, separating an obtained solid product, and drying to obtain a carbon oxide catalyst; wherein the mass concentration of the peroxide solution is 0.1 to 5 weight percent; the heating conditions comprise that the heating temperature is 60-100 DEG C; the heating time is 1-6 hours. According to the method, the carbon black material is treated by peroxide to obtain the carbon oxide catalyst, the hydrogen peroxide selectivity and reaction activity of the catalyst can be improved, and the preparation method is simple to operate.

A process can be used for the treatment of an offgas stream, which is formed in a plant for the production of aluminum by electrolytic reduction of aluminum oxide in a melt, using at least one anode composed of a carbon-containing material. The offgas stream contains carbon oxides due to the reduction of the aluminum oxide by the carbon. At least a substream of the carbon oxides contained in the offgas stream is reacted with hydrogen or mixed with a hydrogen stream and is subsequently passed to a use. After purification and conditioning of the offgas stream in a device, an enrichment, for example with carbon monoxide, can subsequently be carried out in a reactor and the synthesis gas obtained in this way can be fed to a chemical or biotechnological plant for the synthesis of chemicals of value.

The invention provides a method of reducing a gaseous carbon oxide to carbon, the method comprising mixing a gas comprising a gaseous carbon oxide with a liquid metallic composition by producing a dynamic interface between the gas and the liquid metallic composition, wherein the liquid metallic composition is not dispersed as droplets in a liquid carrier during the mixing and wherein the gaseous carbon oxide reacts stoichiometrically with at least one metal in the liquid metallic composition to form carbon and metal oxide.

A system optionally including a carbon oxide reactor. A method for carbon oxide reactor control, optionally including selecting carbon oxide reactor aspects based on a desired output composition, running a carbon oxide reactor under controlled process conditions to produce a desired output composition, and / or altering the process conditions to alter the output composition.

The invention provides hydrocarbon synthesis equipment and a hydrocarbon synthesis process. The hydrocarbon synthesis equipment comprises an alcohol synthesis unit and an alcohol-to-hydrocarbon section, the apparatus and process incorporate a reforming system for treating C1-C4 paraffins and / or olefins enriched by-product streams produced in the apparatus and process to provide a reformer-based syngas stream that is sent to the inlet of an alcohol synthesis unit.

A system optionally including a carbon oxide reactor. A method for carbon oxide reactor control, optionally including selecting carbon oxide reactor aspects based on a desired output composition, running a carbon oxide reactor under controlled process conditions to produce a desired output composition, and / or altering the process conditions to alter the output composition.

The invention discloses a system and a method for measuring and calculating the emission amount of atmospheric pollutants of underground coal fire, and relates to a system for measuring and calculating the emission amount of atmospheric pollutants of underground coal fire. Comprising a power supply module, a methane emission monitoring module, a carbon oxide monitoring module, a nitrogen oxide monitoring module, a sulfur dioxide monitoring module, a black carbon emission monitoring module and an atmospheric pollutant emission flux calculation module. The environmental factor acquisition module, the methane emission monitoring module, the oxycarbide monitoring module, the nitrogen oxide monitoring module, the sulfur dioxide monitoring module, the black carbon emission monitoring module and the atmospheric pollutant emission flux calculation module are all connected with the power supply module; the measuring and calculating method of the underground coal fire atmospheric pollutant emission amount measuring and calculating system comprises the following steps: S1, placing the instrument at a proper position, and adjusting a proper sampling frequency; the problem that the atmospheric pollutant emission flux is difficult to measure and calculate due to intermittency and dispersity of underground coal fire combustion is solved.

The invention discloses a catalyst for preparing graphene and a method for preparing graphene. The catalyst comprises the following components in parts by mass: 5-80 parts of metal copper, 0-20 parts of metal iron and 5-80 parts of third metal, wherein the total mass of the catalyst is 100 parts; and the third metal is selected from at least one of magnesium, titanium, vanadium, chromium, manganese, cobalt, zinc, bismuth, palladium, gold, silver, nickel, tungsten, molybdenum, tin, cadmium, platinum and gallium. The catalyst is heated to a molten liquid state, the feed gas is blown out from the bottom of the liquid catalytic medium, and graphene and hydrogen are generated through cracking in the bubble rising process under the combined action of high temperature and the catalyst. The density of the generated graphene is far lower than that of a liquid catalytic medium, and the generated graphene spontaneously floats on the surface, so that the phenomenon that a traditional catalytic cracking catalyst is easy to deactivate due to carbon deposition is effectively avoided. And meanwhile, no carbon oxide emission is generated in the cracking process, low-carbon and high-value utilization of natural gas resources is realized, and the added value of a natural gas industry chain is extended.

A catalyst suitable for use in carbon oxide conversion reactions is described, said catalyst in the form of a shaped unit formed from an oxidic catalyst powder, said catalyst comprising 30-70% by weight of copper oxide, combined with zinc oxide, alumina and silica, having a Si:Al atomic ratio in the range 0.005 to 0.15:1, and having a BET surface area ≥105 m2 / g and a copper surface area >37 m2 / g catalyst. The catalyst is prepared by a co-precipitation method using an alumina sol.

Described are methods for producing industrial gases (e.g., hydrogen, ammonia, and / or methane) using ferrous iron-containing materials (e.g., olivine) while concurrently sequestering carbon dioxide. The process may involve mixing a ferrous iron-containing material with water and, in some examples, a reaction accelerant. The mixture may be heated to 100-300°C to initiate the oxidation of ferrous cations (Fe2+) to ferric cations (Fe3+) while reducing hydrogen (from water) and / or methane (from water and carbon dioxide, when carbon dioxide is introduced into the ferrous iron-containing mixture). In some examples, carbon dioxide may be added later (after recovering hydrogen) to form carbonates. Specifically, carbon dioxide may be injected at a high pressure (e.g., about 200 bar) post-oxidation to facilitate mineralization, using the exothermic reaction to maintain a favorable temperature. In some examples, metal complexing / chelating reagents are added to bind trace metals such as nickel, copper, cobalt, and platinum group metals for recovery.

The invention relates to a method for preparing a carbon ceramic resistor through photocuring forming, and belongs to the technical field of photocuring forming. Adding the ceramic particles, a photoinitiator and a dispersing agent into the resin, and fully mixing to obtain carbon ceramic resistor photocuring forming slurry; then carrying out photocuring forming to obtain a carbon ceramic resistor biscuit; the biscuit is heated in a non-oxidizing protective gas atmosphere, so that the organic matter is cracked, and carbon obtained after the organic matter is cracked is reserved in the biscuit; then heating the biscuit in an oxygen-containing atmosphere, so that part of carbon in the biscuit reacts with oxygen to generate oxycarbide; and sintering the biscuit in a non-oxidizing protective gas atmosphere, so that the ceramic particles are connected with one another, and the carbon ceramic resistor is obtained. The prepared carbon ceramic resistor is uniform in ceramic particle distribution, small and uniform in pore, and compact in crystal grain accumulation.

The invention provides ultra-microporous carbon oxide and a preparation method thereof, and relates to a preparation method for preparing ultra-microporous carbon oxide with high specific surface area, small aperture, narrow aperture distribution and high surface oxygen content through low-temperature activation. The method comprises the following steps: crushing, screening and cleaning a precursor carbon source to obtain powder with uniform texture; pre-carbonizing the powder, and pickling to obtain a substrate carbon material; carrying out pre-oxidation treatment on the substrate carbon material in air to obtain an oxidized substrate carbon material; and adding an activating agent to activate the substrate carbon material, and pickling to obtain the oxidized ultra-microporous carbon. The surface sample content of the carbon material prepared by the preparation method of the low-temperature regulation oxidized ultra-microporous carbon provided by the invention is up to 16.94%, the contribution rate of pore volume below 1nm is up to 74.64%, and the pore size distribution is narrow. And the method has the advantages of low activator consumption and low activation temperature, greatly reduces the cost barrier, reduces the equipment loss, and is suitable for industrial large-scale production.

The invention belongs to the technical field of gas sensors, and particularly relates to a carbon oxide nanohorn modified chitosan composite membrane and a preparation method and application of the composite membrane. The composite membrane comprises a three-dimensional network skeleton formed by chitosan and carbon oxide nanohorns uniformly dispersed on the three-dimensional network skeleton. The preparation method comprises the following steps: mixing the carbon oxide nanohorn and chitosan according to a mass ratio of 1: (8-10), carrying out vacuum defoaming, spreading and drying. The chitosan carbon nanohorn composite membrane can be used as a sensitive layer of a gas sensor or a monitoring device. According to the application, the carbon oxide nanohorn is introduced into the chitosan matrix as a reinforcing phase, so that the performance of the chitosan film sensor in the aspects of hydrogen sulfide gas detection sensitivity, error and stability can be improved.

A system is described that enables the purification of COx, SOx, NOx, dioxin and furan, and H2S gases using wet and dry filters in a single chimney, comprising: a nozzle system (2) that sprays a mixture consisting of water, micronized zeolite, ammonia, and boron mineral in fine droplets to perform the first purification of SOx (sulfur oxides), NOx (nitrogen oxides), and COx (carbon oxides) gases entering the chimney (1) from the combustion gas, a zeolite-based dry filter (3) that purifies the dioxin and furan components in the flue gas (B) rising after the first purification, a first continuous measurement system (4) that measures the values of the combustion gas at the entry point to the chimney (1), a second continuous measurement system (5) that measures the values of the combustion gas after the dry filter (3), an Al-supported processor (6) that adjusts the amount of the mixture to be sprayed from the nozzle system (2) based on the comparison of the first continuous measurement system (4) and the second continuous measurement system (5).

The present invention relates to a process for producing a methane-rich gas having an operational production mode and an operational standby mode wherein the standby mode comprises directing a standby process gas comprising hydrogen and less than 0.1 vol% carbon oxide into contact with the material catalytically active for methanation.

A method of producing a liquid fuel includes: causing a raw material gas containing at least a carbon oxide and hydrogen to flow into a reactor storing a catalyst; and producing the liquid fuel from the raw material gas through a conversion reaction in the presence of the catalyst. The raw material gas further contains oxygen. The ratio of the concentration of carbon monoxide to the concentration of carbon dioxide in the carbon oxide is 0.9 or less.

The present invention provides a process and apparatus for producing an alcohol product stream from a gas fermentation process. A feed gas stream comprising hydrogen and a carbon oxide is subjected to fermentation to convert at least a portion of the feed gas stream to an alcohol. Fermentation is conducted in a reactor having a plurality of trays.

A process for separating a carbon dioxide product stream from a flue gas stream is disclosed. The process comprises passing a stream of carbon dioxide and oxygen to a regenerator to generate a catalyst stream and produce a flue gas stream comprising carbon oxides, and / or nitrogen oxides, catalyst fines, oxygen, and water. Heat is transferred to a water stream from the flue gas stream in a heat recovery unit to form a cooled flue gas stream and a steam stream. Water is removed from the cooled flue gas stream in a dehydration unit to provide a dehydrated flue gas stream. The dehydrated flue gas stream is separated into an oxygen stream and a carbon dioxide product stream.

A process for converting a carbon oxide into a renewable product, particularly a carbon oxide produced from the hydroconversion of a biofeedstock. The process comprises contacting a carbon oxide containing process stream with a catalyst system under catalytic conditions to convert the carbon oxide to non-carbon oxide products, wherein the catalyst system comprises a noble metal catalyst. The process may be used in an integrated process for producing a renewable fuel and a renewable product from a carbon oxide, the integrated process comprising a biofeedstock hydroconversion process and a carbon oxide deoxygenation process wherein a carbon oxide byproduct from the hydroconversion process is contacted with a catalyst system comprising a noble metal catalyst to produce a renewable product.

The invention discloses a method for producing hydrogen by catalytic gasification of oil-containing sludge, which comprises the following steps: directly feeding the oil-containing sludge into a fixed bed gasifier, pyrolyzing and cracking at the high temperature of 700-900 DEG C to generate hydrogen, methane and carbon oxides, and simultaneously generating solid carbon residues, arranging a catalytic wall compounded by 50% titanium-nickel alloy and 50% aluminum oxide in the gasifier, hydrogen release is promoted at high temperature, coke accumulation is reduced, the gasification efficiency is improved, airflow control is oriented, a high-temperature corrosion-resistant airflow guide plate with an adjustable angle is arranged in the gasification furnace, a gas flowing path is optimized, and the hydrogen yield is improved. Therefore, the solid oxide fuel cell and the tail gas recovery system achieve energy self-circulation and tail gas cracking, the overall energy utilization efficiency is improved, meanwhile, pollution of harmful organic matter is reduced through a TiO photocatalytic degradation system, the environmental protection property is improved, and compared with the background technology, the solid oxide fuel cell and the tail gas recovery system have the advantages of being simple in structure and convenient to use. The problems of low energy efficiency, poor hydrogen purity, high carbon emission and difficulty in byproduct treatment in the traditional technology are solved.

Process for making vinyl acetate from biomass, comprising the step of reacting (I) ethylene with (II) acetic acid to give vinyl acetate, wherein (I) ethylene is provided, starting from biomass, by a process comprising (a) producing carbon oxides from biomass, or capturing carbon dioxide from ambient air, optionally followed by electrochemical reduction of carbon dioxide to carbon monoxide; (b) electrochemical reduction of carbon oxides from step (a) to give ethylene; and / or (c1) reacting hydrogen and carbon oxides from step (a) in the presence of a catalyst to give methanol, (c2) reacting methanol from step (c1) to form ethylene; and / or (d1) producing ethanol from biomass by fermentation, (d2) dehydrogenating ethanol from step (d1) to give ethylene; and / or (e) directly producing ethylene from biomass by fermentation; (II) acetic acid is provided, starting from biomass or carbon dioxide captured from ambient air, by a process comprising (f) reacting methanol from step (c1) with carbon monoxide to give acetic acid; and / or (g1) reacting part of the ethylene from steps (b), (c2), (d2) or (e) with oxygen and water to give acetaldehyde, and (g2) reacting acetaldehyde from step (g1) with oxygen to give acetic acid; and / or (h) oxidative fermentation of ethanol from step (d1) to give acetic acid; and / or (i) producing acetic acid from biomass by biomass pyrolysis.

The disclosure relates to a catalyst suitable for electrochemical reduction reactions of one or more carbon oxides, comprising a nitride-doped multi-metallic material comprising a primary metal being copper and one or more secondary metals selected from silver, gold, platinum, palladium, ruthenium, iridium, osmium, and any mixture thereof, wherein the nitride-doped multi-metallic material comprises, as determined by XRD, copper, copper nitride and copper-Me alloy wherein Me is one of the secondary metals and to a gas diffusion electrode suitable for electrolysis of one or more carbon oxides comprising such a catalyst.

The application relates to the field of mixed gas purification and discloses application of gaseous alkane in reducing the risk of combustion and explosion in the deoxidation process of oxygen-containing gas, which comprises: mixing the oxygen-containing gas with hydrogen in the presence of stabilizing gas to perform an oxidation reaction; wherein the stabilizing gas is gaseous alkane, and the oxygen-containing gas contains oxygen and optional other flammable gas. The method for deoxidizing the oxygen-containing light hydrocarbon by hydrogen provided by the application reduces the risk of combustion and explosion of the mixed gas by taking gaseous alkane as the stabilizing gas, adopts the hydrogen-catalyzed reaction to promote the reaction of oxygen in the mixed gas with hydrogen to generate water, achieves the purpose of deoxidation of the oxygen-containing gas, the reaction product is clean, the hydrogen-catalyzed reaction can effectively inhibit the occurrence of carbon deposition on the surface of the catalyst and the generation of carbon oxides, and the hydrogen-catalyzed reaction has strong bearing capacity for the fluctuation of the oxygen content of the raw material gas.

The invention relates to the field of oxidative desulfurization of oil and sulfur-containing liquid hydrocarbon fuels (including diesel fuel) and can be used to reduce harmful emissions and exhausts (in the form of sulphur oxide and carbon monoxide - SO2 and CO) of oil refineries, as well as various industrial enterprises (including energy), facilities and engines using hydrocarbon fuels. Method of oxidative desulfurization of oil and liquid hydrocarbon fuel and reducing harmful emissions of sulfur oxides and carbon provides a process of oxidation in tanks or pipelines by ozone (O3) or ozone-containing gases, in which sulfur oxides (SO2 and SO), without releasing them into the atmosphere, mix in a closed vessel or pipeline with carbon monoxide (CO) and by means of chemical reactions of sulfur monoxide decomposition (2SO↑ → SO2↑+S↓) and sulfur recovery (SO2↑ + 2CO↑ → S↓ + 2CO2↑) elemental sulfur (S) is extracted from oil or liquid hydrocarbon fuel and carbon monoxide (CO) is converted into its dioxide (CO2). The oxidation, also decomposition and recovery reactions are carried out one-step or sequentially, in the presence of oxidation-recovery group catalysts corresponding to these reactions, such as tert-Butyl hydroperoxide (C₄H₁₀O₂). Ozonized atmospheric air is used as ozone-containing gas.

A method for synthesizing methanol and a synthesis gas flow include supplying hydrogen and carbon oxides to a methanol reactor assembly. A residual gas flow with unreacted hydrogen and unreacted carbon oxides is obtained from the methanol reactor assembly, and the residual gas flow is supplied to a hydrogen separation assembly to obtain a hydrogen-containing flow, which is supplied to the methanol reactor assembly and has a higher molar proportion of hydrogen than the residual gas flow. A purge gas flow having methane is obtained from the hydrogen separation assembly. The purge gas flow is supplied to a recovery assembly for recovering a recovery flow having carbon dioxide and hydrogen, the recovery assembly has a recovery reactor for partly converting the methane of the purge gas flow into carbon oxides and hydrogen using a partial thermal oxidation, and the recovery flow is supplied to the methanol reactor assembly.

This invention belongs to the field of acyclic compound synthesis technology, specifically relating to a production process for 1,1-dimethyl-3-hydroxybutyl hydrogen peroxide. The production process includes the following steps: (1) preparing a metal salt solution A; preparing a solution B from 1,3,5-tris(4-carboxyphenyl)benzene; oxidizing carbon nanotubes to form carbon oxide nanotubes, and then preparing a suspension from molecular sieves, metal oxides, and carbon oxide nanotubes; (2) adding solution B to the suspension, continuing to add solution A for reaction, and after post-treatment, obtaining a catalyst precursor; (3) calcining the catalyst precursor in an inert atmosphere to obtain a catalyst; (4) activating the catalyst to catalyze the reaction of 2-methyl-2,4-pentanediol and hydrogen peroxide to obtain 1,1-dimethyl-3-hydroxybutyl hydrogen peroxide. This invention further improves the selectivity and yield of 1,1-dimethyl-3-hydroxybutyl hydrogen peroxide by designing the catalyst.

This invention relates to a lithium secondary battery, comprising a battery casing and an electrode assembly and an electrolyte housed within the battery casing, wherein the value of G, as defined by the following mathematical formula (1), is between 1.8 and 3.5. Mathematical formula (1): where, in the above mathematical formula (1), V CH V represents the volume (in mL) of hydrocarbon gases present in a lithium-ion secondary battery. CO V is the volume (in mL) of carbon oxide gases present in a lithium secondary battery. total The total volume of gas present in the lithium secondary battery (unit: mL) is C, which is the discharge capacity of the lithium secondary battery when charged and discharged at a voltage range of 0.33 C and 2.5 V to 4.2 V.

A process for producing a methane containing product gas mixture is described comprising the steps of: (a) providing a hydrogen containing feed gas stream; (b) providing a carbon oxide containing feed gas stream containing carbon dioxide and optionally carbon monoxide; (c) measuring the flow-rate of the hydrogen containing feed gas stream and adjusting the flowrate of the carbon oxide containing feed gas stream, relative to of the flowrate of the hydrogen in the hydrogen containing feed gas stream to produce a feed gas mixture having a composition with a stoichiometric ratio of reactants having a value M of about 3, where M = ([H2]-[CO2]) / ([CO]+[CO2]); (d) passing the feed gas mixture through one or more beds of methanation catalyst, in a methanation unit, to react a portion of the hydrogen with at least a portion of the carbon dioxide and any carbon monoxide to form a first methane containing product gas mixture including residual hydrogen and residual carbon dioxide; (e) measuring the concentration of residual hydrogen of the first methane containing product gas mixture; and combining the first methane containing gas product mixture with an oxygen containing stream, wherein the flow rate of the oxygen containing stream is adjusted relative to the measured concentration of residual hydrogen in the first methane containing product gas mixture, so as to produce a second methane containing product gas mixture which is passed through a bed of an oxidation catalyst in a hydrogen removal unit to form a hydrogen depleted third methane containing product gas mixture; comprising a total of less than 5 mole% hydrogen; wherein the hydrogen containing gas stream is produced by electrolysis of water.

The present application relates to an effluent analysis device comprising: an effluent sampling passage; the hydrocarbon detector is connected with the discharge sampling channel through a first heat tracing pipeline; the second heat tracing pipeline is connected with the first heat tracing pipeline, and one end, deviating from the first heat tracing pipeline, of the second heat tracing pipeline is provided with a first port and a second port which are arranged in parallel; the nitrogen and oxygen detector is connected with the first port; the carbon and oxygen detector is connected with the second port; the controller is used for respectively acquiring a carbon oxide detection result, a nitrogen oxide detection result and a carbon oxide detection result according to a preset sampling period and carrying out fusion processing. By adopting the discharge analysis equipment, the discharge of the aero-engine can be analyzed and measured.

The invention relates to a method and a device for producing a crude synthesis gas containing hydrogen and carbon oxides by simultaneous partial oxidation of a hydrocarbon-containing gas input stream and a hydrocarbon-containing liquid input stream containing impurities. The evaporation of the liquid input stream is performed under partial evaporation conditions to obtain a gaseous mixed input stream and a liquid residual stream. The gaseous mixed input stream is impurity-depleted relative to the hydrocarbon-containing liquid input stream and is supplied to partial oxidation, where the depletion is effective to prevent the formation of deposits or carbon deposits by crystallization of dissolved inorganic components, especially in and / or upstream of the POX burner. The liquid residual stream is enriched with impurities relative to a hydrocarbon-containing liquid input stream and discharged from the process.