1674results about "Heterogenous catalyst chemical elements" patented technology

The invention provides a novel acrylonitrile catalyst and a preparation method thereof. The novel acrylonitrile catalyst is prepared from the following raw materials: mixed salt, an active component, silica sol, a rare earth precursor, a carrier and a cosolvent, by introducing the cosolvent and optimizing the carrier structure, the dispersity of the rare earth precursor is improved, the production process is optimized, the doping efficiency of the rare earth precursor is remarkably improved, the activity, selectivity and stability of the novel acrylonitrile catalyst are improved, generation of by-products CO, CO2, acrolein and acrylic acid during acrylonitrile production can be reduced, and industrial efficient preparation is achieved.

The invention discloses a high-entropy oxide for synergic nitrogen removal and catalysis as well as a preparation method and application thereof, and belongs to the technical field of material preparation, the high-entropy oxide is a single solid solution phase formed by five or more metal elements of Fe, Co, Ni, Cu, Mn, Ti and Ce and an oxygen element, the configuration entropy of the high-entropy oxide is greater than or equal to 1.5 R, R is a gas constant, and R is an oxygen constant. The mole fraction of each metal element is 0.1-0.3, and the sum of the mole fractions of the metal elements is 1. According to the high-entropy oxide with the synergistic nitrogen removal and catalysis effects and the preparation method and application thereof, a synergistic catalysis system is constructed through the high-entropy oxide and silicon carbide, and the high-entropy oxide has the multiple advantages of being high in nitrogen removal efficiency, high in stability, simple in process, environmentally friendly and wide in application range; the removal rate of total nitrogen and key nitrogen pollutants can reach 90% or above in the seawater high-salt environment, and the environment-friendly emission requirement is met.

Cu-based catalysts with excellent thermal stability for selective hydrogenation and a preparation method thereof are provided. The method includes: first, six mixed metal salts are instantaneously nucleated in an alkaline solution by the nucleation / crystallization isolation method, to prepare high-entropy composite metal hydroxides (H-LDHs) with uniform element distribution and similar metal proportions. Furthermore, well-crystallized high-entropy oxides (HEOs) are obtained based on the structural topology characteristics of H-LDHs, and a series of Cu-Mx / HEOs catalysts with flexible adjustable catalytic microzone geometries and electronic structures are obtained using the HEOs as precursors.

The invention discloses a high-oxygen-storage zirconium solid solution material and a preparation method, and belongs to the technical field of rare earth catalytic materials, and the method comprises the following steps: precursor preparation, ultrasonic dispersion, double-gradient precipitation, ultrasonic aging, solid-liquid separation, three-section roasting and furnace cooling. Through the synergistic effect of double-gradient precipitation and ultrasonic aging, coarse grains and non-uniform particle size distribution are avoided, and the material is not prone to abnormal growth of the grains and structural collapse in long-term high-temperature service. Meanwhile, according to the gradient roasting process, through step-by-step regulation and control of crystal densification and crystal lattice reconstruction, separation of a fluorite phase and a pyrochlore phase easily occurring in traditional low-temperature single-section roasting is reduced, a stable crystal phase structure is maintained, it is ensured that the material can still keep sufficient active surface and pore channel structures under the working conditions of high temperature and thermal shock alternation, and the performance of the material is improved. The oxygen storage capacity and the long-term durability of the catalyst carrier are obviously improved.

This invention discloses a method for preparing a CuZnAlGa-based layered double hydroxide (TLH)-derived catalyst for methanol production from carbon dioxide-rich syngas. Using Cu, Zn, Al, and Ga metal salts as precursors, Na₂CO₃ and NaOH as precipitants, and a mixed alcohol-water solution as an auxiliary solvent, co-precipitation is performed under controlled temperature and pH to obtain a LDH-like catalyst precursor. After high-temperature calcination and in-situ reduction in a hydrogen atmosphere, a layered framework structure of Cu nanoparticles immobilized by oxides is obtained. The LDH-like structure provides lattice confinement, preventing Cu particle aggregation, and the interaction between Cu and the oxides enhances the catalyst surface's adsorption capacity for CO and CO₂, thereby improving the activity and stability of methanol production from carbon dioxide-rich syngas.

A catalyst and methods for making the catalyst are provided. An exemplary catalyst includes the formula: MoaVbTec-TadOx. In this formula, a is 1.0, b is about 0.01 to about 0.3, c is about 0.01 to about 0.09, d is about 0.01 to about 0.05, and x is the number of oxygen atoms necessary to render the catalyst electronically neutral.

The nano titanium oxide main body photocatalytic sterilization multi-element material provided by the invention comprises 85%-98% of a nano titanium oxide material, 2%-15% of a perovskite material and a modifier, the modifier comprises silver, silver oxide and graphene, and the modifier comprises a nano titanium oxide main body and a nano titanium oxide main body. The nano titanium oxide main body photocatalytic sterilization multi-element material can fully utilize the characteristics of a perovskite structure material, overcomes the defects of a nano titanium oxide material, improves the light utilization rate, inhibits carrier recombination, improves the antibacterial durability, can utilize ultraviolet light to carry out catalytic sterilization and can also utilize ions to carry out sterilization, and the antibacterial effect is good. Sterilization can be achieved through the photolysis reaction of visible light, the synergistic composite sterilization effect is achieved, harmful germs are rapidly and effectively killed, the environment is kept fresh and safe, and the comprehensive sterilization and deodorization effect can be achieved by adding the modifier; the preparation method of the nano titanium oxide main body photocatalytic sterilization multi-element material provided by the invention is simple in steps, convenient to operate and easy to implement.

The invention discloses a high-entropy metal oxide catalyst as well as a preparation method and application thereof in CO catalytic oxidation, and belongs to the technical field of flue gas treatment. The preparation method comprises the following steps: dissolving copper salt, manganese salt, cerium salt, cobalt salt, vanadium salt and a dispersing agent into water to form a uniform solution, and slowly adding excessive alkali precipitant into the uniform solution to form a solid-liquid mixture; the solid-liquid mixture is transferred into a high-pressure kettle to be subjected to a hydrothermal reaction and then quenched, an obtained hydrothermal reaction product is calcined, and the high-entropy metal oxide catalyst is obtained and is high in catalytic oxidation activity on carbon monoxide at the low temperature, excellent in water resistance and sulfur resistance and particularly suitable for treatment of complex flue gas.

The invention discloses an environment-friendly and efficient composite metal oxide catalyst, a preparation method thereof and application of the catalyst in flue gas denitration. According to the catalyst, TiO2 serves as a carrier, and metal oxides such as Mn, Fe, W and Mo and various auxiliaries are loaded. The preparation method comprises the steps of dissolving, mixing, precipitating and the like, and process parameters of each step are accurately controlled. The catalyst is activated at the temperature of 50 DEG C, the NO conversion rate at the temperature of 120 DEG C is 96.3% or above, and the catalyst keeps high activity in a wide temperature range of 100-400 DEG C, resists SO2 toxicity, is environmentally friendly and non-toxic, is suitable for flue gas denitration of industrial boilers and the like, and has remarkable advantages compared with the prior art.

The invention discloses a preparation method of CoWO (cobalt tungsten oxide) modified NbOp-n heterojunction NbO5 / CoWO photocatalyst powder. The preparation method comprises the following steps: dissolving cobalt salt and tungsten salt in deionized water, stirring and mixing, carrying out hydrothermal reaction in an autoclave, washing and drying to obtain CoWO powder; the preparation method comprises the following steps: dissolving niobium oxalate and ammonium carbonate in deionized water, adding CoWO powder, carrying out a hydrothermal reaction in an autoclave, and carrying out washing and drying treatment to prepare NbO / CoWO photocatalyst powder. According to the method, the hydrothermal reaction temperature is regulated and controlled, and the mass ratio of raw materials is optimized, so that the catalyst forms a p-n heterojunction structure of NbOmicron flower loaded CoWOnano particles. The prepared catalyst has high norfloxacin wastewater degradation efficiency under visible light irradiation, has the advantages of simple preparation process, low reagent cost, high catalytic activity and good structural stability, and can be effectively applied to purification treatment of antibiotic polluted water.

The invention belongs to the technical field of catalytic materials and hydrocarbon reforming, and particularly relates to a high-entropy catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a metal salt solution containing lanthanum, chromium, copper, zinc, manganese, nickel, iron and cobalt ions with a chelating agent and a dispersing agent for reaction, carrying out ultrasonic cavitation treatment to obtain sol, adjusting the pH value, gelatinizing under an oil bath heating condition to obtain a colloidal precursor, drying, and calcining in an air atmosphere to obtain a perovskite type high-entropy oxide precursor; and then treating in a reducing atmosphere to obtain the FeZnCuNiCo perovskite type high-entropy alloy catalyst which contains metal components of La, Cr, Ni, Mn, Fe, Zn, Cu and Co and takes a multi-metal alloy active center of Fe-Zn-Cu-Ni-Co as a main component. The high-entropy catalyst can meet the harsh requirements of high temperature, strong carbon deposition driving force and long-period operation in a propane dry reforming reaction, and is suitable for industrial application scenarios of continuous production of high-temperature synthesis gas.

The present invention relates to an ammonia decomposition catalyst and a manufacturing method thereof, and more particularly to an ammonia decomposition catalyst containing alumina (Al2O3), cerium (Ce), lanthanum (La), ruthenium (Ru) and potassium (K).

The present invention relates to the field of catalyst technology, discloses a supported noble metal catalyst and its preparation method and application, the catalyst includes a first carrier and a coating loaded on the first carrier, the raw material composition for preparing the coating includes a second carrier, an active component precursor, an auxiliary agent precursor, a binder and a dispersant; the first carrier is cordierite, mullite or cordierite-mullite; the second carrier is titanium dioxide and / or aluminum oxide; the active component precursor is selected from at least one of a platinum precursor, a palladium precursor and a rhodium precursor; the auxiliary agent precursor is a combination of a cerium precursor, a zirconium precursor and a neodymium precursor; the binder is a mixture of an organic binder, an inorganic binder and a coupling agent. The supported noble metal catalyst has low production cost, high catalytic activity, strong anti-poisoning ability and long service life, can be used for the removal of volatile organic compounds, and is particularly suitable for the removal of flue gases such as ethylene and propane with large air volume and low concentration of organic small molecule hydrocarbons.

The invention belongs to the field of carbon nanomaterials, and relates to a cobalt molybdenum / magnesium aluminum metal catalyst, a preparation method and application thereof, and a preparation method of a carbon nanotube. The preparation method of the cobalt molybdenum / magnesium aluminum metal catalyst comprises the following steps: S1, carrying out chelation reaction on metal salt and small molecular organic acid in a solvent, adjusting the pH value of the obtained chelation product to 3-7.5, and mixing the chelation product with a modifier to form gel; and S2, roasting the gel to obtain the cobalt molybdenum / magnesium aluminum metal catalyst. The preparation method is characterized in that in the preparation process of the cobalt-molybdenum / magnesium-aluminum metal catalyst, small-molecular organic acid is used as a chelating agent, and a specific modifier is used as an accelerant and a stabilizer, so that the prepared cobalt-molybdenum / magnesium-aluminum metal oxide has good structural stability and catalytic performance, and when the cobalt-molybdenum / magnesium-aluminum metal oxide is used as a carbon nanotube synthesis catalyst, the catalytic performance of the catalyst is greatly improved. Not only can the carbon yield be improved, but also the few-walled carbon nanotube with small tube diameter and high length-diameter ratio can be obtained.

The invention relates to a preparation method and application of a composite piezoelectric catalytic material NaNbO3-coated BiFeO3 for rapidly degrading antibiotics, NaNbO3 is flaky crystal grains with [001] crystallographic orientation prepared by a two-step molten salt method, and BiFeO3 is micro-nano particles prepared by a coprecipitation method. Composite micro-nano BiFeO3 powder and [001] oriented NaNbO3 flaky grains form a heterojunction, conversion of mechanical energy and electric energy of the material is achieved under the ultrasonic vibration condition, inductive charges are generated on the surface of the material, and photon-generated carriers move reversely under driving of a built-in electric field. According to the invention, the piezoelectric catalytic degradation capability of the BiFeO3 and NaNbO3 composite piezoelectric catalytic materials with different proportions on four antibiotics, namely oxytetracycline, levofloxacin, carbamazepine and paracetamol in different time periods is researched. When the mass ratio of the BiFeO3 to the NaNbO3 composite material is 1: 3, the oxytetracycline degradation rate within 30 min can reach 78.2%, the oxytetracycline degradation rate within 120 min can reach 91.8%, and the piezoelectric electro-catalysis characteristic is rapid and efficient. The method disclosed by the invention has important significance in developing a high-efficiency piezoelectric catalyst for degrading antibiotics.

The invention relates to a preparation method of an A-site cerium-doped double perovskite catalyst and an application of the A-site cerium-doped double perovskite catalyst in catalytic oxidation of toluene, and belongs to the technical field of environmental catalytic materials. Aiming at the technical defects that a traditional noble metal catalyst is high in cost and the oxygen mobility of a perovskite material is insufficient, the double perovskite material is designed through A-site Ce < 3 + > / Ce < 4 + > doping and B-site Co / Mn bimetal collaboratively, and the chemical general formula is La2-xCexCoMnO6 (x is greater than or equal to 0 and less than or equal to 0.3). The catalyst shows remarkable advantages in catalytic oxidation of toluene: under the conditions that the mass space velocity is 18000 mL. (g.h) <-1 > and the toluene concentration is 2000 mg. M <-3 >, T50 (50% conversion rate temperature) is 223 DEG C, T90 (90% conversion rate temperature) is 243 DEG C, and the catalyst is superior to an undoped sample La2CoMnO6 catalyst. The preparation method of the catalyst is simple, the product selectivity is high, the stability is good, and the catalyst is especially suitable for efficient low-temperature catalytic degradation of methylbenzene.

The invention provides a composite catalyst for synthesis of methanol from CO2, a preparation method and application thereof, the composite catalyst is composed of a metal oxide MOX as a carrier and a loaded A-B2O3 composite active component, A is Co, Fe or Mn, and B is Gd, Y or La; mOX is selected from at least one of ZrO2, TiO2 and Al2O3; the mass of the A-B2O3 accounts for 10.5 wt%-32 wt% of the mass of the composite catalyst. By adopting the composite active component of Co, Fe or Mn and Gd, Y or La and taking ZrO2, TiO2 or Al2O3 as the carrier, the problems of low hydrogenation activity, poor thermal stability and easy sintering of the traditional catalyst are effectively solved, meanwhile, the defects of high cost and excessive CO2 conversion of the Ni-based catalyst are avoided, and the CO2 conversion rate and methanol selectivity are remarkably improved.

The invention discloses a catalyst for dehydrogenation of a liquid organic hydrogen energy carrier as well as a preparation method and a dehydrogenation method of the catalyst. The catalyst for dehydrogenation of the liquid organic hydrogen energy carrier comprises an active component, an auxiliary agent and a carrier, the active component is Pt, the auxiliary agent is CeO2, and the carrier is MgO-Al2O3 composite oxide; the CeO2 is dispersed on the surface of the MgO-Al2O3 composite oxide in an island form; pt is selectively dispersed on the CeO2 islands. The catalyst can inhibit agglomeration and growth of Pt particles and deposition of organic carbides on the surface of the catalyst in the dehydrogenation reaction process, and shows excellent activity and stability.

A method may include operating a dehydrogenation process whereby a hydrocarbon-containing feed is converted to light olefins, wherein the dehydrogenation process utilizes a fluidized process catalyst that circulates between a reactor and a combustor. The method may comprise withdrawing the process catalyst from the dehydrogenation process, modifying the process catalyst to form a modified catalyst, and adding the modified catalyst back to the dehydrogenation process. The process catalyst may include from 0.1 wt. % to 10 wt. % of one or more metals chosen from gallium, indium, thallium, or combinations thereof, from 1 ppmw to 1000 ppmw of one or more metals chosen from platinum, palladium, rhodium, iridium, ruthenium, osmium, or combinations thereof, and at least 85 wt. % support. Modifying the process catalyst may include adding one or more of manganese, iron, chromium, or vanadium.

The invention discloses a high-thermal-conductivity core-shell copper-zinc-aluminum catalyst, a preparation method thereof and application of the high-thermal-conductivity core-shell copper-zinc-aluminum catalyst in a methanol reforming hydrogen production reaction. Aiming at the strong heat absorption characteristic of a methanol reforming hydrogen production reaction, a coprecipitation method is utilized to prepare a copper-zinc-aluminum catalyst with a heat conduction agent as a core and copper, zinc oxide and aluminum oxide nanoparticles as a shell, so that a metal salt is subjected to in-situ precipitation reaction on the surface of the heat conduction agent, and micro mixing of the copper, zinc oxide and other nanoparticles and the heat conduction agent is realized; compared with other heat conduction agent adding modes such as particle mixing and tabletting mixing, the catalyst shows a stronger catalytic effect in a strong endothermic reaction such as a methanol steam reforming hydrogen production reaction, and the optimal catalyst conversion rate reaches 51.1% under the conditions that the reaction temperature is 230 DEG C and the WHSV is equal to 24 h <-1 >.

The invention discloses a catalyst for preparing trichlorosilane and a catalytic preparation method of trichlorosilane. The catalyst is prepared from the following components in percentage by mass: weighed copper nitrate, zinc nitrate, aluminum nitrate, lanthanum nitrate and the balance of a carrier, the preparation method comprises the following specific steps: S1, filling a catalyst; S2, purifying raw material gas; S3, reacting; and S4, separating and purifying a product, namely discharging a reacted gas product from an outlet of a reactor, and condensing through a condenser. In the prepared catalyst, the activity and selectivity of the catalyst are remarkably improved through the synergistic effect of the copper-zinc-aluminum composite oxide and the rare earth element lanthanum, the electronic structure and the surface acid-base property of the catalyst can be adjusted through doping of lanthanum, the reaction of silicon powder and hydrogen chloride is promoted, meanwhile, side reactions are inhibited, and the service life of the catalyst is prolonged. And the yield of trichlorosilane is improved.

The application discloses a kind of composite desulfurizer suitable for oxygen-containing condition desulfurization and its preparation method and application, belong to desulfurizer technical field.The composite desulfurizer is double-layer composite structure;Wherein: outer layer is iron oxide hydroxyl layer, including iron oxide hydroxyl and first binder;Inner layer is copper zinc aluminum layer, including copper oxide, zinc oxide, alumina and second binder.The composite desulfurizer obtained in the application significantly improves the service life of desulfurizer under oxygen-containing condition, and the sulfur capacity of desulfurizer can be as high as 10~20%, and the simultaneous removal of organic sulfur and inorganic sulfur can be realized in one step, effectively reducing the desulfurization cost, with important application prospect.In addition, the preparation of double-layer structure composite desulfurizer is realized by double-layer extruding machine in the application, and the process is simple, which is beneficial to industrialized mass production.

The invention relates to a multifunctional tandem catalytic process for directly preparing methyl acetate / ethanol from synthesis gas. According to the process, a novel catalyst for preparing dimethyl ether from synthesis gas is prepared by adopting an impregnation method, and after the catalyst is sequentially connected with a dimethyl ether carbonylation catalyst and a hydrogenation catalyst in series, efficient directional synthesis of methyl acetate and ethanol is realized in a double-bed or three-bed sequential filling form. According to the invention, high CO conversion per pass, high methyl acetate selectivity and low acetic acid selectivity can be realized, and the problems of corrosion and difficult conversion of a subsequent hydrogenation system are effectively avoided; the multifunctional catalytic system provided by the invention is simple in preparation method and easy to realize industrial large-scale production.

The present invention discloses a method for regulating spinel-type high-entropy oxides using electrospinning. The method is characterized in that metal sources, polyacrylonitrile, and dimethylformamide of varying concentrations are fully mixed to form a precursor solution, followed by preparing a spinel-type high-entropy oxide having a nanofiber structure by electrospinning. Results show that, compared to conventional methods for preparing high-entropy oxides, electrospinning facilitates a lower phase transition temperature and promotes the formation of nanoscale high-entropy oxides. Furthermore, the fibers formed are significantly affected by the precursor solution. By varying the amount of total metal added, the final fiber state of the catalyst can be effectively regulated, exhibiting significant differences in ethyl acetate catalytic oxidation activity. The preparation process is simple, enhancing the application value of high-entropy oxides in the field of heterogeneous catalysis.

The invention provides a catalytic material, a preparation method thereof and application of the catalytic material in high-purity ethyl aliphatic amine, and belongs to the technical field of fine chemical engineering. The catalytic material provided by the invention has a porous structure, so that the specific surface area of the catalytic material can be remarkably increased, more active sites can be used for contact between reaction raw materials and a catalyst, the reaction process is accelerated, meanwhile, the retention time of the reaction raw materials on the surface of the catalyst is prolonged by the porous structure, and the conversion rate of the reaction raw materials (liquid ammonia) is further improved; active components are loaded on the surface of the AB2O4 type porous composite transition metal oxide, so that the number of active sites can be further increased, and the conversion rate of liquid ammonia is further improved. Results of the embodiment show that when the catalytic material provided by the invention is used for preparing ethyl aliphatic amine by an ethanol catalytic amination method, the conversion rate of liquid ammonia is 95% or above.

To provide exhaust gas clarification equipment that has high OSC, and can highly efficiently remove harmful components even after being exposed to high temperature environment, and a method for manufacturing the exhaust gas clarification equipment.SOLUTION: Exhaust gas clarification equipment comprises: base material having an upstream end and a downstream end; a first catalyst layer formed in a first area between the downstream end and a first position; and a second catalyst layer including second rhodium particles that are formed in a second area between the upstream end and a second position. The first catalyst layer includes a first rhodium-containing catalyst and a first cerium-containing oxide. An average of particle size distribution of the first rhodium particles included in the first rhodium-containing catalyst is 2 to 10 nm. An amount of rhodium, which is solidly dissolved in a first metal oxide carrier, based on a total weight of rhodium included in the first rhodium-containing catalyst is less than 17 wt%. A cerium content (g / L) of the first catalyst layer is one time or more of a cerium content (g / L) of the second catalyst layer.SELECTED DRAWING: Figure 1

The invention belongs to the field of environmental protection, analysis and detection, and relates to a composite catalyst for a total organic carbon tester, and a preparation method, a use method and application thereof. The composite catalyst comprises a carrier-loaded core-shell type catalyst, wherein the core-shell type catalyst comprises a high-entropy oxide shell and a platinum nano core wrapped by the high-entropy oxide shell; the core-shell type catalyst is uniformly distributed on the carrier; the metal elements in the high-entropy oxide shell comprise four elements of Mn, Cr, Ce and Fe, and any one or more of three elements of Co, Ni and Ru. The core-shell structure protects the platinum noble metal in the inner core and enhances the stability and the core durability of the platinum noble metal, the high-entropy oxide shell effectively inhibits diffusion and phase change of crystals, enhances the thermal stability and the sintering resistance of the catalyst and improves the poisoning resistance and the corrosion resistance, and due to the synergistic effect of multiple elements, the performance is far better than that of linear superposition of a single component.

The invention provides a ferromanganese-based NH3-SCR (selective catalytic reduction) denitration catalyst as well as a preparation method and application thereof. The ferromanganese-based NH3-SCR denitration catalyst is obtained through a reaction of Mn salt, Fe salt and Pr salt. The molar ratio of Mn to Fe is (1: 0.69)-(1: 0.71); and the molar ratio of Mn to Pr is (1: 0.05)-(1: 0.25). The preparation method of the ferromanganese-based NH3-SCR denitration catalyst comprises the following steps: providing Mn salt, Fe salt and Pr salt; wherein the molar ratio of Mn to Fe is (1: 0.69) to (1: 0.71); the molar ratio of Mn to Pr is (1: 0.05)-(1: 0.25); the Mn salt, the Fe salt and the Pr salt are subjected to a reaction, and the ferromanganese-based NH3-SCR denitration catalyst is obtained. In flue gas denitration, the catalyst has good sulfur resistance and water resistance and excellent low-temperature catalytic activity.

The invention discloses application of a supported heterogeneous catalyst of oxide and copper-manganese spinel in preparation of acetaldehyde by anaerobic dehydrogenation of ethanol, and belongs to the technical field of heterogeneous catalysis for preparation of acetaldehyde and hydrogen by anaerobic dehydrogenation of ethanol. The reaction is carried out in a fixed bed reactor, under the conditions that the reaction atmosphere is nitrogen, the reaction temperature is 280 DEG C and the mass space velocity is 66.1 h <-1 >, the ethanol conversion rate is 72.5%, the acetaldehyde selectivity is 95.0%, and the space time yield of acetaldehyde based on the copper-manganese composite oxide is 43.5 h <-1 >, so that high-selectivity preparation of acetaldehyde and hydrogen under relatively mild conditions is realized; the system has the remarkable advantages of simple catalyst preparation, high catalytic activity under the condition of high mass airspeed, high space-time yield of acetaldehyde, high atom utilization rate of the system, good stability and the like. The CuMnTi-1 catalyst can be stabilized for more than 70 hours, the CuMnTi-1 improves the utilization rate of copper and manganese, improves the catalytic performance, reduces the demand quantity of copper-manganese spinel in the reaction, and reduces the overall cost of catalyst preparation.

The invention discloses a method for preparing synthesis gas through methane chemical chain reforming. According to the method, an iron-based oxygen carrier is cyclically operated in a system comprising a reduction reactor, a reforming reactor and an air reactor. Comprising the following steps: reacting a complete iron oxide-based oxygen carrier regenerated in an air reactor with a part of synthesis gas generated by a reforming reactor in a reduction reactor to generate a gas mixture of water and carbon dioxide and a part of reduced iron-based oxygen carrier; the partially reduced iron-based oxygen carrier is introduced into a reforming reactor and reacts with biogas for reforming and deep reduction of the oxygen carrier, and a target product synthesis gas and the deeply reduced iron-based oxygen carrier are generated; and finally, introducing the deeply reduced iron-based oxygen carrier into an air reactor, reacting with air to regenerate a completely oxidized iron-based oxygen carrier, circulating the completely oxidized iron-based oxygen carrier to the reduction reactor for use, and generating oxygen-deficient air at the same time. According to the invention, through redox cycle of the iron-based oxygen carrier, biogas and air are used as raw materials, and efficient conversion from biogas to high-quality synthesis gas is realized.