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127 results about "Methane combustion" patented technology
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Methane combustion is a chemical reaction that occurs from burning methane gas — which is an odorless and colorless fossil fuel — causing high amounts of heat and pressure to be produced. This gas is not present in the atmosphere around us, but it can be extracted through mining processes from basic fossil fuels throughout the world.
Low-concentration methane combustion catalyst and its preparation method
InactiveCN103191733APromote resultsReduced activityIncinerator apparatusMetal/metal-oxides/metal-hydroxide catalystsCoal mine methaneHigh activity
The invention provides a low-concentration methane combustion catalyst and its preparation method. The catalyst treats Al2O3 as a carrier, treats a precious metal Pd as a primary catalytic activity component, and treats one or more of precious metals comprising Pt, Rh, Ru and Ir and one or more of metal oxides comprising CeO2, ZrO2, La2O3 and TiO2 as catalytic assistants. The catalyst can be applied in particle, and Al2O3, all catalytic activity components and the assistants can be supported on honeycomb ceramic to prepare a whole catalyst. The catalyst has the advantages of high activity, high hydrothermal stability, long life and the like; and the catalyst can be used for the efficient utilization of low-concentration methane in a coal mine gas (coal mine methane), and can also be used for the efficient removal and utilization processes of other VOC gases to realize the full utilization, energy saving and environmental protection purposes of energy.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Perovskite type methane combustion catalyst as well as preparation method and application thereof
ActiveCN106732647AExtended service lifeIncrease loadHeterogenous catalyst chemical elementsIncinerator apparatusRare-earth elementAlkaline earth metal
The invention provides a perovskite type methane combustion catalyst as well as a preparation method and application thereof. The catalyst comprises an active component and a carrier, wherein the active component has a general formula: Al-xA'xB1-yB'yO3; in the formula, A is a rare earth metal element; A' is an alkaline earth metal element; B and B' represent transition metal elements; x is more than or equal to 0 but less than or equal to 0.9; y is more than or equal to 0 but less than or equal to 0.9; the carrier consists of spherical aluminum oxide of at least two crystal phases in delta-Al2O3, theta-Al2O3 or alpha-Al2O3, The aluminum oxide carrier has larger specific surface area, so that the loading capacity of the active component on the carrier can be improved; meanwhile, the uniform dispersion of the active component is facilitated, so that the sintered agglomeration of the active component is prevented, and the service life of the catalyst is prolonged; in addition, the catalyst provided by the invention is good in activity, and the selectivity of the reaction of methane and oxygen for CO2 is high; the perovskite type methane combustion catalyst has the advantages of being low in initiation temperature, high in combustion efficiency, good in mass transfer and heat transfer performance, and the like.
Owner:BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
Palladium-based catalyst for methane catalytic combustion and preparation of palladium-based catalyst
InactiveCN103203233AMetal/metal-oxides/metal-hydroxide catalystsCatalytic effectTemperature resistance
The invention discloses a palladium-based catalyst for methane catalytic combustion. An active component is precious metal palladium, and a carrier is mesoporous alumina prepared by using pseudo-boehmite as an aluminum source, wherein the mesoporous alumina is synthesized by calcining industrial raw material pseudo-boehmite serving as an aluminum source in the presence of surfactant, and the palladium-based catalyst is prepared by adopting equivalent-volume impregnation; the specific surface are of mesoporous alumina is 200-400m<2> / g, the pore volume is 0.2-0.8cm<3> / g, and the aperture is 3-10nm; and the content of the active component palladium is 0.1-1% of the total weight of the catalyst. The raw material adopted by the catalyst is industrial raw material, the preparation cost is low, the preparation process is simple, the mesoporous alumina prepared by using pseudo-boehmite as an aluminum source has large pore volume and large specific surface area, the prepared palladium-based catalyst which serves as a carrier is good in catalytic effect on the methane combustion reaction and has low-temperature high-activity, high-temperature resistance, sintering resistance.
Owner:YUNNAN UNIV
Method for preparing methyl hydride combustion catalyst
InactiveCN101293201ASimple processLow costGaseous fuelsMetal/metal-oxides/metal-hydroxide catalystsWater bathsCombustion
The present invention discloses a preparation method of methane combustion catalyst. The major preparation process includes: Sn powder is dissolved in nitric acid and added into citric acid solution for stirring and refluxing at the temperature of 90 DEG C to 100 DEG C; La(NO3)3 and Mn(NO3)2 are weighed and confected into metal-ion citric acid complexing solution; the complexing solution is added into the stannum-containing citric acid solution for further stirring and refluxing; the solution is transferred to a beaker for constant-temperature water bath at the temperature of 70 DEG C and evaporation so as to become wet gel and the wet gel is placed in an infrared drying box and dried into dry gel; after grinding, decomposition by a muffle furnace and sintering by a high-temperature furnace, LaMn0.8O3 / La2Sn2O7 catalyst is obtained. The preparation method is simple and the prepared catalyst has the characteristics of novel structure, stability, low cost, low methane initiation temperature and low whole transformation temperature.
Owner:INNER MONGOLIA UNIVERSITY
Method for preparing dual-perovskite type methyl hydride combustion catalyst containing titanium
InactiveCN101293200ASimple structureHigh catalytic activityGaseous fuelsMetal/metal-oxides/metal-hydroxide catalystsEvaporationCoordination complex
The present invention relates to a preparation method of titanium-containing double perovskite type methane combustion catalyst. The process is characterized in that a certain amount of butyl titanate is added into ethanol to produce white sediment; concentrated nitric acid is added until the sediment is totally dissolved and transparent solution is obtained; lanthanum nitrate and magnesium nitrate are weighed and dissolved in the deionized water and a certain amount of dextrose is added, thus completely forming composition solution; then gel is formed by constant-temperature stirring and evaporation; the gel obtained is dried and sintered at the temperature of 500 DEG C, 800 DEG C and 1,100 DEG C in the air for three hours to obtain the catalyst La2MgTiO6. The present invention is characterized in that the Sol-Gel Preparation Method with the dextrose as the complexing agent is adopted and the single-phase double layer perovskite type composite oxide catalyst is prepared at lower temperature. The preparation method is simple and low in cost. The catalyst used in methane catalytic combustion reaction has the characteristics of low initiation temperature and low whole transformation temperature.
Owner:INNER MONGOLIA UNIVERSITY
Oxidation catalysts comprising metal exchanged hexaaluminate wherein the metal is Sr, Pd, La, and/or Mn
InactiveUS7442669B2High activityImprove stabilityHeterogenous catalyst chemical elementsRuthenium/rhodium/palladium/osmium/iridium/platinum compoundsAlkanePartial oxidation
The present invention provides metal-exchanged hexaaluminate catalysts that exhibit good catalytic activity and / or stability at high temperatures for extended periods with retention of activity as combustion catalysts, and more generally as oxidation catalysts, that make them eminently suitable for use in methane combustion, particularly for use in natural gas fired gas turbines. The hexaaluminate catalysts of this invention are of particular interest for methane combustion processes for minimization of the generation of undesired levels (less than about 10 ppm) of NOx species. Metal exchanged hexaaluminate oxidation catalysts are also useful for oxidation of volatile organic compounds (VOC), particularly hydrocarbons. Metal exchanged hexaaluminate oxidation catalysts are further useful for partial oxidation, particularly at high temperatures, of reduced species, particularly hydrocarbons (alkanes and alkenes).
Owner:TDA RES
Ventilation air methane combustion catalyst and preparation method thereof
InactiveCN101947457AEasy to prepareLow costDispersed particle separationMetal/metal-oxides/metal-hydroxide catalystsPtru catalystSilicic acid
The invention discloses a ventilation air methane combustion catalyst and a preparation method thereof. The catalyst consists of the following components in percentage by weight: 1 to 50 percent of active ingredient, 1 to 30 percent of active aid and the balance of porous carrier, wherein the active ingredient is one or two of oxides of manganese and cobalt or soluble salts of manganese and cobalt; the active aid is any one of cerium compounds or lanthanum compounds; and the porous carrier is one or more of aluminium oxide, titanium oxide, zirconium oxide, magnesium oxide, calcium oxide, silicon dioxide, aluminium silicate and magnesium silicate. The catalyst is applied to ventilation air methane combustion and has the advantages of simple preparation method, low cost, relatively low methane ignition point and complete combustion temperature, and the like.
Owner:SOUTHWEST RES & DESIGN INST OF CHEM IND
Catalyst for combustion of ventilation air methane and preparation method thereof
InactiveCN101912783AEasy to prepareLow costDispersed particle separationGaseous fuelsPtru catalystSilicic acid
The invention discloses a catalyst for combustion of ventilation air methane and a preparation method thereof. The catalyst of the invention consists of an active ingredient, an active auxiliary agent and a porous carrier, wherein the active ingredient may be one or two of oxides of iron and copper or soluble salts of iron and copper; the active auxiliary agent is any one of cerium or lanthanum compounds; the porous carrier may be one or more of aluminum oxide, titanium oxide, zirconium oxide, magnesium oxide, calcium oxide, silica, aluminium silicate and magnesium silicate; and in form of oxide, the active ingredient accounts for 1 to 50 weight percent, the active auxiliary agent accounts for 1 to 30 weight percent and the carrier accounts for the balance. The catalyst of the invention has a catalytic effect on the combustion of the ventilation air methane and has the advantages that: the preparation method is simple; cost is low; methane ignition temperature and complete combustion temperature are low; and the like.
Owner:HAO HUA CHENGDU TECH
Catalyst for catalyzing methane combustion and preparation method thereof
ActiveCN107262093AGuaranteed high temperature stabilityImprove high temperature thermal stabilityHeterogenous catalyst chemical elementsDispersed particle separationActive componentOxygen vacancy
The invention provides a catalyst for catalyzing methane combustion and a preparation method thereof. The catalyst comprises a carrier, and an active component which is loaded on the carrier, wherein the active component is wrapped with a wrapping layer for providing oxygen vacancy. The catalyst further comprises a catalyst promotor which is a ceria-zirconia solid solution. According to the catalyst, the wrapping layer wraps the active component, so that oxygen molecule stored in the wrapping layer can be timely conveyed to the active component, so that the high-temperature stability of the active component of the catalyst is maintained; in addition, the catalyst further comprises the catalyst promotor which is the ceria-zirconia solid solution capable of generating more oxygen vacancies and timely effectively storing and discharging oxygen, so that the high-temperature stability of the active component of the catalyst is improved; in addition, the wrapping layer, the ceria-zirconia solid solution and the carrier are mutually dispersed and in contact, so that the mutual insulation effect is achieved, and the sintering of the carrier is inhibited, and as a result, the high-temperature thermal stability and the catalyzing activity of the catalyst can be improved.
Owner:FUZHOU UNIV +1
Device for improving N2O production in sewage treatment and control method thereof
ActiveCN103408141ASave denitrifying carbon sourceShort reaction processTreatment with aerobic and anaerobic processesGas phaseLiquid tank
The invention discloses a device for improving N2O production in sewage treatment and a control method thereof. The device comprises a raw water tank, a water inlet pump, a short-cut nitrification liquid tank, a short-cut nitrification liquid inlet pump, an N2O production reactor and an air compressor. The N2O production reactor is a sealed SBR reactor. The N2O production reactor comprises a sealing cover, a water seal device, an agent filling inlet, an N2O collection pipe, a stirrer, an aeration gas pipe, an aeration head, a DO probe and a pH probe. The control method comprises that a sludge inner carbon source is used as a denitrification carbon source and nitrite inhibits the activity of an N2O reductase so that N2O accumulation is realized; and through aeration, N2O in the mixed liquid is blown into a gas phase and then is collected and the collected N2O can be used as an oxidizing agent for methane combustion so that production power is improved. The control method can improve production power of a sewage treatment plant, reduce an N2O release amount, reduce a sludge yield and reduce a denitrification carbon source demanded amount.
Owner:北控水务(中国)投资有限公司
Combined methane decomposition and ammonia formation cell
InactiveUS7094384B1Reduce needImprove efficiencyHydrogen/synthetic gas productionHydrogen separation by diffusionChemical industryOxygen
An ammonia synthesis process and apparatus are provided which are energy efficient and minimize greenhouse-gas-emission during the processing of natural gas and air. In the process a stream of natural gas is divided into two streams, one of which is mixed with air and ignited to provide heat for the thermal decomposition of natural gas into hydrogen and carbon and also to provide deoxygenated nitrogen for an ammonia synthesis process. The process essentially prepares hydrogen and nitrogen on a low average temperature side of a chemical reactor and then feeds both gases to the high average temperature side of the chemical reactor where they react to form ammonia. The formation of ammonia is exothermic, whereas the thermal decomposition of methane is endothermic and the combustion of methane to remove oxygen is also exothermic; the sum of the heats absorbed and released in these reactions is positive. Catalysts, high temperatures and pressure are used to promote the rapid formation of ammonia, as is standard practice in the chemical industry. Catalysts, and high temperatures are used to promote the thermal decomposition of natural gas and combustion of oxygen that provides hydrogen and nitrogen for ammonia synthesis.
Owner:UNIV OF CENT FLORIDA RES FOUND INC
Nano-composite catalyst and preparation method thereof
ActiveCN102626641AHigh degree of compoundReduce dosageMetal/metal-oxides/metal-hydroxide catalystsDecompositionSurface-active agents
The invention provides a nano-composite catalyst and a preparation method thereof, belongs to the technical field of catalyzing, and solves the problem that the conventional load nano-composite oxide catalyst is low in nano-composite degree, and poor in catalyzing performance. The nano-composite catalyst is obtained by the flowing steps based on the condition that a surface-active agent is not used: firstly, reducing composite oxide crystal lattices or first metal ions mixed in the crystal lattices so as to obtain nano-metal granules containing first metal; and then introducing second metal into the surface of the first metal by Galvanic substitution reaction so as to obtain the nano-composite catalyst. Compared with the conventional catalyst, the nano-composite catalyst has more efficient catalyzing performance when being used for catalytic reaction of VOC (volatile organic compound) removal, automobile tail gas purification, formaldehyde removal, methane combustion, hydrogenation, hydrogenolysis, ammonia synthesis, ammonia decomposition, hydrocarbon synthesis, hydroformylation and the like.
Owner:CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Supported-palladium catalyst used for methane combustion and preparation method for supported-palladium catalyst
InactiveCN104923224AIncinerator apparatusMetal/metal-oxides/metal-hydroxide catalystsAlkali metal oxideRare earth
The invention relates to a supported-palladium catalyst used for methane combustion and a preparation method for the supported-palladium-loaded catalyst. The catalyst is characterized in that an active ingredient is noble metal palladium, an auxiliary is a rear-earth oxide, an alkali metal oxide or an alkali metal oxide and a carrier is tin oxide, wherein the content of the palladium accounts for 0.1-5 percent of the catalyst; the content of the rear-earth oxide is 3-10 percent; and the content of the alkali metal or alkali metal oxide is 0.01-2 percent. The supported-palladium catalyst disclosed by the invention can be used for catalytic combustion of ultralow-concentration methane, and has the characteristics of high activity and strong stability.
Owner:EAST CHINA UNIV OF SCI & TECH
Tourmalinite-containing composite methane catalyst
ActiveCN102728381AIncrease burn rateImprove catalytic oxidation rateGaseous fuelsMetal/metal-oxides/metal-hydroxide catalystsRare earthMethane gas
The invention relates to a tourmalinite-containing composite methane catalyst. The composite methane catalyst is prepared by compounding of a methane catalyst and tourmalinite, and the mass ratio of tourmalinite to the methane catalyst is 1:50-3:10. The methane catalyst contains a perovskite type methane catalyst, a hexaaluminate type methane catalyst or a metal oxide methane catalyst. According to the invention, the refined mineral material tourmalinite is used in the methane catalyst such that methane gas can be effectively and greatly activated, combustion efficiency and methane combustion rate are raised, production cost is low and the preparation technology is simple. The rare earth tourmalinite composite methane catalysis material provided by the invention can be widely applied in fields of catalytic combustion, industrial organic exhaust-gas treatment, automobile tail gas purification and the like, is of important and active significance for energy saving and emission reduction and reasonable usage of energy, and can bring to the nation with good economic benefit and social benefit.
Owner:HEBEI UNIV OF TECH
Graphene oxide rare earth compound catalytic material and preparation method thereof
ActiveCN104307530AUnique Surface Interface StructureHigh catalytic activityIncinerator apparatusMetal/metal-oxides/metal-hydroxide catalystsCombustionHydrazine compound
The invention discloses a graphene oxide rare earth compound catalytic material and a preparation method thereof. The catalytic material comprises the following raw materials in percentage by mass: 0.47-1.48% of graphene oxide, 11.71-28.25% of perovskite type rare earth oxide and 70.62-87.82% of an additive. The catalytic material is prepared from graphene oxide, perovskite type rare earth oxide and the additive by using a hydrothermal method; the perovskite type rare earth oxide is ABO3 oxide; the additives are ethanediamine, hydrazine hydrate or urea. The catalyst disclosed by the invention is excellent in methane combustion catalytic activity, the initial combustion temperature is 300 DEG C, complete conversion can be achieved at 405 DEG C, the activity effect is relatively good, the initial combustion temperature is identical, and the complete conversion temperature is reduced by 85 DEG C.
Owner:HEBEI UNIV OF TECH
Spherical catalyst with Pd wrapped by cerium dioxide and preparation method thereof
ActiveCN108465466AHigh activityImprove stabilityIncinerator apparatusMetal/metal-oxides/metal-hydroxide catalystsDispersityGas composition
The invention discloses a spherical catalyst with Pd wrapped by cerium dioxide and a preparation method thereof. The preparation method comprises the steps: firstly, preparing a precursor solution A of cerium salt and palladium salt, and then carrying out a reaction of the precursor solution A in a hydrothermal reaction kettle to produce a product B; and carrying out centrifugal washing, drying and calcination of the product B, to obtain the spherical catalyst with Pd wrapped by cerium dioxide. The synthesis method is simple, and the obtained catalyst has high Pd metal dispersion degree and catalytic oxidation performance. Under the conditions of the gas composition of 2% of CH4, 4% of O2 and 20% of CO2, N2 balance and the space velocity of 100000 mL*g<-1>*h<-1> and at the reaction temperature of 470 DEG C, the methane conversion rate of the catalyst can reach 90%, and the structure of the catalyst has no obvious change after thermal aging for 2 h at the temperature of 1000 DEG C, theactivity of the catalyst is kept 99% or more in a 50 h stability test carried out at the temperature of 500 DEG C in the same atmosphere, and the catalyst has excellent methane combustion catalytic activity and stability.
Owner:FUZHOU UNIV
High temperature resistant catalyst for low concentration methane combustion and preparation method thereof
InactiveCN102407129ALow costImprove thermal stabilityDispersed particle separationMetal/metal-oxides/metal-hydroxide catalystsYttriumMethane combustion
The invention relates to a high temperature resistant catalyst for low concentration methane combustion and preparation method thereof. The catalyst is catalyst based on core shell structure of perovskite encapsulated yttrium stabilized zirconium nano particle. Mass percentage of perovskite is 10-30% and that of yttrium stabilized zirconium is 70-90%. The catalyst is used for methane catalytic combustion and able to completely catalytically combust methane at 380-545 degrees centigrade when methane content is 0.5% and space velocity is 24000h-1. The advantages of the invention are low catalyst cost, good thermal stability, simple preparation method, easy industrialization, small pollution, low methane ignition temperature and complete combustion temperature.
Owner:SHANGHAI JIAO TONG UNIV
Control device for methane combustion utensil
InactiveCN1828143AImprove convenienceDomestic stoves or rangesLighting and heating apparatusEngineeringControl circuit
The invention relates to a gas kitchen range controller, which comprises a power resource; a flame detecting unit, a valve control unit for controlling the gas supply; a logic control circuit, at least one group of liquid crystal panels on the control panel to display the setting and working condition; a control panel with several operation buttons and switches as the input interface to said logic control circuit, a clock part, a timing part, a timing controller to timing control said valve control unit to block the gas supply channel, a flame signal processing unit for analyzing the detected signal of said flame detecting unit, that when the flame is normal, keeping the gas supply channel open via said valve controller, and when the flame is abnormal, blocking the gas supply channel via said valve controller.
Owner:徐忠雄
Mn and Ce doped Cu based methane combustion catalyst and preparation method thereof
InactiveCN105536804ALow costLow ignition temperatureCatalyst activation/preparationMetal/metal-oxides/metal-hydroxide catalystsCerium nitrateCopper nitrate
The invention provides an Mn and Ce doped Cu based methane combustion catalyst, which comprises, by mass percentage, 3% of Mn, 5% of Ce, 10% of Cu and the balance carrier gamma-Al2O3. The catalyst is prepared by step impregnation, and the preparation method includes: firstly dipping globular gamma-Al2O3 into a certain amount of manganese nitrate solution according to a load ratio order from small to large, then taking the globular gamma-Al2O3 out and conducting standing, drying, roasting and natural cooling, then dipping the globular gamma-Al2O3 into a certain amount of a cerium nitrate solution, then taking the globular gamma-Al2O3 out, and carrying out standing, drying, roasting and natural cooling to obtain an intermediate catalyst; and then dipping the intermediate catalyst into a certain amount of a copper nitrate aqueous solution, then taking the intermediate catalyst out, and carrying out standing, drying, roasting and natural cooling to obtain the Mn and Ce doped Cu based methane combustion catalyst. The methane catalyst is easily prepared, adopts non-noble metals as the raw materials, and is low in cost. In addition, the catalyst provided by the invention not only lowers the ignition temperature of methane catalysis, also enhances the high-temperature catalytic activity, and improves the whole methane catalytic activity.
Owner:CHONGQING UNIV
Cobaltosic oxide in-situ coated silicon dioxide mesoporous sphere surface loaded noble metal catalyst, and preparation method and application thereof
ActiveCN111036236AHigh activityImprove stabilityGaseous fuelsIncinerator apparatusPtru catalystMetal catalyst
The invention discloses a cobaltosic oxide in-situ coated silicon dioxide mesoporous sphere surface loaded noble metal catalyst, and a preparation method and an application thereof. A large number ofcoordination sites are provided for Pd atoms by utilizing the nitrogen-rich characteristic in mesoporous spheres, so the interaction force between a carrier and Pd NPs is enhanced, the stability of the Pd NPs is improved, and the conversion from PdO to Pd is relieved; and dopamine is introduced in the Pd loading process, so that a loose polydopamine layer is converted into a carbon shell in situ under the nitrogen condition, the surface of the catalyst is covered with the carbon shell, and the advantage of a shell structure is constructed. The method can inhibit the growth of Pd nanoparticlesand Co nanoparticles, enhances the dispersity and the sintering resistance and agglomeration resistance of noble metals, and effectively saves the preparation cost of the catalyst. The conversion rateof methane combustion of the prepared catalyst is close to 95% at a temperature being as low as 280 DEG C, the catalyst has H2O and CO2 resisting capacity, and energy is effectively saved.
Owner:SOUTH CHINA UNIV OF TECH
Cobalt-based catalyst and preparation method and application thereof
ActiveCN104437501AExcellent combustion activityAchieve light-offDispersed particle separationMetal/metal-oxides/metal-hydroxide catalystsCobalt(II,III) oxideMesoporous material
The invention relates to a cobalt-based catalyst and a preparation method and application thereof. The cobalt-based catalyst is a mesoporous material formed by nanocrystallines, the specific area of the mesoporous material is 23.38-172.28 m<2> / g, and the grain size is 4.5-15.5 nanometers. The cobalt-based catalyst comprises a mixture of one or more oxides of ferrite, cobaltosic oxide, nickel oxide and manganese oxide, wherein the atomic ratio of cobalt to iron to nickel is 1:(0.060-0.10):(0-2.16), or the atomic ratio of cobalt to iron to manganese is 1:0.28:2.97, or the atomic ratio of cobalt to nickel is 1:(0.23-3.65). The cobalt-based catalyst disclosed by the invention can be used for effectively reducing the methane initiation temperature and enhancing the methane combustion rate by using a transition metal composite oxide obtained through a low-temperature oxidation reduction-concentration crystallization or oxalate co-precipitation-heat treatment process for a methane catalyst, and has the advantages of low cost, simple preparation process and easiness for popularization; a synthesized substance has the characteristics of high specific area, adjustability in size, composition and texture and the like, and is an excellent low-temperature methane catalysis material.
Owner:ZHEJIANG NORMAL UNIVERSITY
Nickel cerium catalyst as well as preparation method and application thereof
InactiveCN103977808ALow ignition temperatureLower combustion temperatureIncinerator apparatusMetal/metal-oxides/metal-hydroxide catalystsCeriumBENZYL ALCOHOL/WATER
The invention discloses a nickel cerium catalyst as well as a preparation method and application thereof, and relates to a methane combustion catalyst. The nickel cerium catalyst comprises nickel oxide and a carrier, wherein the mole percentage of the nickel oxide load quantity is 1%-15%; the carrier is cerium oxide, wherein the specific surface area of the nickel cerium catalyst is 123-179m<2> / g. The preparation method of the nickel cerium catalyst comprises the following steps: 1) mixing cerous nitrate and benzyl alcohol, then heating reflux, further refluxing after water removing treatment, cooling the mixture to room temperature, centrifuging, washing, drying, and roasting to obtain a cerium oxide carrier; 2) soaking the cerium oxide carrier obtained from the step 1) into a nickel precursor salt compound ethanol solution according to the proportion of the catalyst, drying at 90 DEG C, roasting, grinding, tabletting, and sieving to obtain the nickel cerium catalyst, and marking as xNiO / CeO2 (x=1, 5, 10, 15). The nickel cerium catalyst can be applied to methane catalytic low-temperature combustion reaction; raw materials are low in price, can be available easily, and are low in cost; the preparation steps are relatively simple, and the preparation condition is mild.
Owner:XIAMEN UNIV
Method for generating and utilizing N2O in partial nitrifying process of sludge digestion solution
ActiveCN103739086ALow running costReduced oxygen demandBiological water/sewage treatmentSequencing batch reactorSewage
The invention discloses a method for generating and utilizing N2O in a partial nitrifying process of a sludge digestion solution. A device used by the method comprises a sludge nitrifying solution tank, a water inlet pump, a partial nitrifying N2O producing reactor, and the like, wherein the partial nitrifying N2O producing reactor is a sealed SBR (Sequencing Batch Reactor), and is provided with a sealing cover, an N2O collecting pipe, an exposure head, a DO (Dissolved Oxygen) probe and a pH probe. The method comprises the steps: regulating and controlling operating conditions through inoculating partial nitrifying particular sludge to enhance accumulation of N2O in the partial nitrifying process of the sludge digestion solution; then collecting a gas at the upper of the reactor as an oxidant of methane combustion, so that the yield is increased. According to the method, the release amount of N2O in the partial nitrifying process of the sludge digestion solution can be reduced, and the yield of a sewage plant can be increased.
Owner:BEIJING UNIV OF TECH
Combined methane decomposition and ammonia formation cell
InactiveUS6986870B1Reduce needImprove efficiencyPhysical/chemical process catalystsChemical industryChemical industryOxygen
An ammonia synthesis process and apparatus are provided which are energy efficient and minimize greenhouse-gas-emission during the processing of natural gas and air. In the process a stream of natural gas is divided into two streams, one of which is mixed with air and ignited to provide heat for the thermal decomposition of natural gas into hydrogen and carbon and also to provide deoxygenated nitrogen for an ammonia synthesis process. The process essentially prepares hydrogen and nitrogen on a low average temperature side of a chemical reactor and then feeds both gases to the high average temperature side of the chemical reactor where they react to form ammonia. The formation of ammonia is exothermic, whereas the thermal decomposition of methane is endothermic and the combustion of methane to remove oxygen is also exothermic; the sum of the heats absorbed and released in these reactions is positive. Catalysts, high temperatures and pressure are used to promote the rapid formation of ammonia, as is standard practice in the chemical industry. Catalysts, and high temperatures are used to promote the thermal decomposition of natural gas and combustion of oxygen that provides hydrogen and nitrogen for ammonia synthesis.
Owner:UNIV OF CENT FLORIDA RES FOUND INC
Distributive energy supply compressed gas energy storage system
ActiveCN105351022AImprove energy supply effectReasonable distributionElectrolysis componentsHydrocarbon from carbon oxidesElectrolysisThermal energy storage
The invention relates to a distributive energy supply compressed gas energy storage system. According to the system, in the energy storage stage, surplus electric power is utilized for finishing water electrolysis, methane preparing, carbon dioxide, methane and air compressing and underground storing, and thermal storage in the air compressing process. In the energy releasing stage, an underground gas storage system provides sufficient methane, carbon dioxide and air, an electrolysis water system and a methane preparing system provide a high-temperature heat source for a carbon dioxide energy releasing system and an air energy releasing system, and it is guaranteed that the carbon dioxide energy releasing system and the air energy releasing system can provide sufficient electric energy. Heat generated in the air compressing process and methane combustion heat are used for heat supplying, and heat of different grades can be provided according to the heat grade differences of users. Air expanded through the air energy releasing system provides the cooling capacity for the users.
Owner:INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
Plasma-assisted method for preparing perovskite type methane combustion catalyst
ActiveCN111905718AHas active chemical propertiesReduce the temperatureHeterogenous catalyst chemical elementsCatalyst activation/preparationPtru catalystPerovskite (structure)
The invention discloses a plasma-assisted method for preparing a perovskite type methane combustion catalyst, which comprises the following steps: adding a complexing agent into a soluble metal salt solution containing A-site elements and B-site elements to form a mixed solution containing a metal complex, evaporating the mixed solution to obtain wet gel, and drying and pretreating the wet gel toobtain a precursor; then putting the precursor into a glow discharge plasma generating device, and carrying out plasma treatment in an oxygen atmosphere to obtain the perovskite type methane combustion catalyst. According to the preparation method disclosed by the invention, lattice distortion of a perovskite structure is induced by utilizing the characteristic that high-energy particles generatedby gas discharge in glow discharge plasmas have active chemical properties; compared with a perovskite type catalyst prepared by traditional roasting or without plasma action, the catalyst has the advantages of more defect sites, lower grain size, larger specific surface area and the like, shows better activity in a methane combustion reaction, and reduces the temperature of the methane combustion reaction.
Owner:NANJING UNIV OF TECH +2
Agricultural multifunctional automatic control room
InactiveCN102422795ARich varietySimple thermostatClimate change adaptationAnimal housingAutomatic controlGreenhouse
Owner:许耕来
Ultrasonic-assisted prepared ultralow-concentration methane combustion catalyst and preparation method thereof
InactiveCN104307522ASimple preparation processShort preparation cycleMetal/metal-oxides/metal-hydroxide catalystsUltrasonic assistedStructure and function
The invention discloses an ultrasonic-assisted prepared ultralow-concentration methane combustion catalyst which adopts gamma-Al2O3-MgO as a carrier, wherein the surface of the carrier is loaded with an active ingredient CuO; in the active ingredient CuO, Cu accounts for 5%-10% of the catalyst in mass; compared with the catalyst prepared through adopting a common dipping method, the ultralow-concentration methane combustion catalyst has the following differences: an ultrasonic technology is led in in the loading process of the active ingredient with the ultrasonic wave frequency being 90-300 W, frequency being 20-25 KHZ, and time being 10-30 min, which can achieve an optimum effect; meanwhile, the invention further discloses a preparation method for the ultrasonic-assisted prepared ultralow-concentration methane combustion catalyst. By utilizing energy of ultrasonic waves, the active ingredient CuO is modified and optimized in the structure and functions. The ultrasonic-assisted prepared ultralow-concentration methane combustion catalyst and the preparation method thereof have the following advantages: the preparation technology for the catalyst is simple, the preparation period is short, and when the catalyst subjected to ultrasonic modification is used for catalytic combustion of ultralow-concentration methane, catalytic activity and stability of the catalyst can be effectively improved.
Owner:CHONGQING UNIV
Protruding-ribbed roller type straw treatment device with tail heat recovery and biomass fuel
InactiveCN107881097AContinuous monitoring of production dataRealize automatic continuous processingBioreactor/fermenter combinationsBiological substance pretreatmentsLacquerMoisture
The invention discloses a protruding-ribbed roller type straw treatment device with tail heat recovery and biomass fuel. The protruding-ribbed roller type straw treatment device comprises a protruding-ribbed roller, a methane fermenting tank, a methane storage tank, a counter current drying tower, a methane combustion machine, a methane boiler, a heat pump host and a computer, wherein a sine ultrasonic vibration exciter is arranged on the left lower part of the methane fermenting tank, the right upper part of the methane fermenting tank is connected with a tank bottom through a pipeline and aroots fan, the roots fan is connected with the methane storage tank, the methane storage tank is connected with the methane boiler through a pipeline and the methane combustion machine, the methane boiler is connected with the counter current drying tower through a steam fin hot air fan, the left upper part of the counter current drying tower is sequentially connected with a spiral closed air feeder, a protruding roller and a dissection machine, a tail gas pipe is connected with a heat pump system, a cosine lacquer disk pulsed aeration device is arranged on the left lower part of the counter current drying tower, and the treatment device is controlled by the computer. The protruding ribbed roller, the cosine lacquer disk pulsed aeration device and the sine ultrasonic vibration exciter canreliably realize comprehensive development and utilization on crop straws and wastes with particularly large moisture content gradient.
Owner:田华
Preparation method of aluminum oxide film-layer carrier of integrated methane combustion catalyst
ActiveCN106732499AStable structureReduce reactivityCatalyst carriersHeterogenous catalyst chemical elementsBeta phaseActive component
The invention discloses a preparation method of an aluminum oxide film-layer carrier of an integrated methane combustion catalyst. The preparation method comprises the following steps: soaking a honeycomb-shaped carrier into aluminum sol; taking out the honeycomb-shaped carrier and removing the surplus aluminum sol on the surface; drying and roasting at the temperature of 800 DEG C to 1200 DEG C to form an aluminum oxide film layer which at least has any one crystal phase of beta-phase, theta-phase and alpha-crystal phase on the honeycomb-shaped carrier. The integrated methane combustion catalyst is prepared from the aluminum oxide film-layer carrier and an active component. The integrated methane combustion catalyst prepared by the invention has a high catalytic performance and a long service life.
Owner:BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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