32results about How to "High low temperature activity" patented technology

The invention discloses a preparation method of a low-temperature SCR (Selective Catalytic Reduction) catalyst with coke loaded with transition metal oxide. The preparation method comprises the following steps: preparing superfine coal powder; removing mineral substances from the superfine coal powder to obtain ash-removed coal powder; chemically activating the deashed coal powder into an activated coal base; coking the activated coal base to form a coal coke carrier; and preparing a single Fe oxide catalyst and an Fe-Mn composite oxide catalyst which take the coal coke as a carrier. The catalyst is prepared from the coal, so that the utilization value of the coal can be improved, the conversion of the coal from fuel to raw materials can be accelerated, and the pollution of the coal to the environment is reduced. Meanwhile, compared with a noble metal catalyst and coke, the catalyst with the coke carrier prepared by the method disclosed by the invention is lower in price and wide in source, so that the preparation cost of the catalyst can be reduced, and compared with other matrix materials, the coke carrier prepared by the method disclosed by the invention takes superfine pulverized coal coke as a matrix, so that the cost of the catalyst is reduced. The preparation cost is lower, and the pore structure is richer.

The invention discloses a preparation method of a Pt / TiO2 catalyst and its application in NH3-SCO reaction. The preparation method comprises the following steps: providing nano titanium dioxide; mixing a platinum source, water and alcohol to prepare a platinum source solution; placing the nano titanium dioxide in the platinum source solution, turning on ultraviolet light for photodeposition reaction, and then filtering and drying the precipitate to obtain a Pt / TiO2 catalyst. The method can prepare a Pt / TiO2 catalyst with low noble metal loading, high and low temperature activity and high N2 selectivity.

The invention discloses a heat transfer enhanced high-stability noble metal catalytic oxidation dehydrogenation multilayer core-shell catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts. The catalyst sequentially comprises an aluminum oxide carrier inner core, a defect anchoring layer, a noble metal layer and a protective shell layer from inside to outside, wherein the alumina carrier is particles prepared by mixing active gamma-Al2O3 and a coated high-heat-conductivity-coefficient material, and the defect anchoring layer is composed of oxides having strong interaction with metal; the precious metal layer is composed of precious metal element Pd, and the protective shell layer is made of porous SiO2. The invention also discloses a preparation method of the catalyst and application of the catalyst in dehydrogenation of mixed gas. According to the invention, low-temperature high-efficiency activation of hydrogen can be realized, the dehydrogenation precision of the dehydrogenation catalyst under an industrial operation condition is improved, poisoning and sintering inactivation of H2O to active sites of the dehydrogenation catalyst are inhibited, and the hydrothermal stability is improved. The catalyst is longer in service life and has a wide application prospect.

The invention relates to the technical field of degreasing agents, in particular to a high-efficiency energy-saving degreasing agent and a preparation method thereof, and the high-efficiency energy-saving degreasing agent comprises the following components in parts by weight: 6-9 parts of recombinant thermostable lipase; 4-7 parts of alkaline protease; 1.5 to 2.5 parts of nano silver particles wrapped by chitosan; 0.8 to 1.8 parts of beta-cyclodextrin modified carbon quantum dots; 12 to 18 parts of sodium alginate based intelligent hydrogel microspheres; 18 to 22 parts of lauryl glucoside; 12 to 18 parts of coconut oil-based betaine; 6 to 9 parts of propylene glycol; 4 to 7 parts of d-limonene; 10 to 14 parts of polyethylene glycol 400; 2 to 4 parts of dipotassium phosphate; according to the modified recombinant thermostable lipase, the low-temperature activity and the pH adaptability are remarkably improved while the high catalytic efficiency is maintained, and the antibacterial performance is enhanced by combining the nano-silver particles wrapped by the chitosan with the beta-cyclodextrin modified carbon quantum dots.

The invention belongs to the technical field of NH3 catalytic oxidation catalysts, and particularly relates to a preparation method and application of a surface defect-rich catalyst for NH3 catalytic oxidation, and the preparation method comprises the following steps: (1) mixing heteropolyacid, a molecular sieve and deionized water, grinding, carrying out vacuum drying, and calcining in an inert atmosphere to obtain catalyst carrier powder; (2) weighing a manganese precursor salt and an auxiliary agent precursor salt, dissolving the manganese precursor salt and the auxiliary agent precursor salt in water to prepare an aqueous solution, adding the catalyst carrier into the aqueous solution of the manganese precursor salt and the auxiliary agent precursor salt, carrying out vacuum drying, and calcining in an inert atmosphere to obtain a supported catalyst; and (3) reducing the supported catalyst in a mixed reducing atmosphere containing CO / inert gas to obtain the catalyst with rich surface defects. According to the method disclosed by the invention, rich defect sites can be constructed on the surface of the catalyst, the NH3 catalytic oxidation activity of the catalyst under a wide temperature window is promoted, and meanwhile, the N2 selectivity is improved.

The invention relates to a preparation method and application of a Ni-CeO2 catalyst. The method comprises the following steps: (1) dissolving nickel precursor salt, cerium oxide precursor salt and citric acid monohydrate in deionized water to prepare a mixed solution; (2) refluxing, stirring and aging the mixed solution in a water bath at 50-90 DEG C for 1-5 hours; (3) performing rotary evaporation on the aged sol to obtain gel; after drying, grinding into powder, and calcining at 300-500 DEG C to obtain a NiO-CeO2 precursor; (4) reducing the obtained NiO-CeO2 precursor, so as to obtain a Ni-CeO2 catalyst A; the prepared Ni-CeO2 catalyst is used for methanation reaction. The catalyst has excellent carbon dioxide conversion rate and methane selectivity at low temperature, and meanwhile, the catalyst has long-period stability and good carbon deposition resistance.

The invention relates to a preparation method of a monolithic catalyst for methane catalytic combustion, which comprises the following steps: dipping a honeycomb carrier in titanium dioxide sol, taking out, drying, and roasting to obtain a carrier with a TiO2 coating; the carrier with the TiO2 coating is soaked in an active metal salt solution, 3-(trifluoroacetamido) pyrrolidine hydrochloride is added into the active metal salt solution, active metal is perovskite type metal composite oxide, the structural general formula is ABO, the carrier is taken out, dried and roasted, and the monolithic catalyst is obtained. The monolithic catalyst provided by the invention is used for catalytic combustion of methane, T90 is less than or equal to 500 DEG C, and the monolithic catalyst has the advantages of high low-temperature catalytic activity, good activity retention after long-term use and the like.

The invention discloses a preparation method of a VOCs oxidation catalyst, precious metal is dispersed in heteropolyacid through a self-propagating method, the activity of the precious metal is improved, and meanwhile, the cage-shaped structure of the heteropolyacid can be used as a supporting framework of the precious metal to improve the overall mechanical strength and stability of the catalyst; then the obtained powder catalyst and a second carrier are prepared into coating slurry together, cordierite is coated with the coating slurry through dipping, the coating is modified after drying, and therefore the competitive adsorption effect of water vapor on reaction gas on active sites is reduced, and the catalyst can be suitable for the VOCs treatment process with the high water content and the low operating temperature.

The invention relates to a CO2 catalytic conversion catalyst and a preparation method and application thereof.The preparation method of the catalyst comprises the steps that a silicon source, an aluminum source and an inorganic acid aqueous solution are weighed to form white sol, then centrifugation, washing and drying are conducted, white silicon-aluminum composite oxide powder is obtained, a binder is added, rolling ball forming is conducted, and a silicon-aluminum composite oxide carrier precursor is obtained; and weighing the first active component precursor, the second active component precursor and the auxiliary component precursor, loading the precursors on the silicon-aluminum composite oxide carrier precursor in a dipping manner, drying, and roasting to obtain the CO2 catalytic conversion catalyst. Compared with the prior art, the catalyst provided by the invention has the advantages of high activity, high selectivity, high stability and the like in the CO2 reverse water gas shift reaction.

The invention discloses an ultralow-temperature electrolyte and a lithium carbon fluoride battery prepared from the ultralow-temperature electrolyte, and belongs to the technical field of batteries, the ultralow-temperature electrolyte comprises an organic solvent and a lithium salt, the organic solvent is a mixture of a carboxylic ester compound and a fluorinated ester compound, the concentration of the lithium salt in the electrolyte is 0.5-2.0 mol / L, and the concentration of the fluorinated ester compound in the electrolyte is 0.5-2.0 mol / L; the volume fraction of the carboxylic ester compound in the electrolyte is 70%-90%, the volume fraction of the fluorinated ester compound in the electrolyte is 10%-30%, and the prepared electrolyte is kept in a liquid state at-40 DEG C. Appropriate carboxylic ester and carbonic ester solvents are selected and used in a matched mode according to a certain proportion, and the conductivity of the electrolyte can be improved at low temperature, the viscosity can be reduced, the low-temperature activity can be enhanced, and the low-temperature performance can be improved.

The invention provides a Pr6O11-SnO2-ZrO2 ternary composite oxide as well as a preparation method and application thereof, and relates to the technical field of catalyst carriers. The Pr6O11-SnO2-ZrO2 ternary composite oxide disclosed by the invention is prepared from the following raw materials in percentage by mass: 60%-80% of ZrO2, 10%-20% of SnO2 and 10%-20% of Pr6O11. According to the invention, by designing the composition ratio of the Pr6O11-SnO2-ZrO2 ternary composite oxide material, the structural stability of the Pr6O11-SnO2-ZrO2 ternary composite oxide is enhanced, and the Pr6O11-SnO2-ZrO2 ternary composite oxide plays a synergistic effect with the active component and the auxiliary agent, so that the low-temperature activity and high-temperature-resistant hydrothermal stability of the catalyst are improved.

The invention discloses a method for improving the performance of Cu-SSZ-39 and a metal composite oxide-loaded Cu-SSZ-39 catalyst, wherein the performance of Cu-SSZ-39 is improved by loading the metal composite oxide onto the surface of Cu-SSZ-39, wherein the metal in the metal composite oxide is any two or three of cerium, manganese and iron. The invention is easy to repeat and operate, and the obtained metal composite oxide-loaded Cu-SSZ-39 catalyst has excellent NH3-SCR catalytic performance, hydrothermal stability and sulfur poisoning resistance, and has broad application prospects.

The invention discloses an environmentally friendly aluminum paint stripper and a preparation method thereof in the field of paint stripper technology, including the following components by weight: 15-20 parts of alkaline substances, 8-10 parts of catalyst promoters, 6-8 parts of cosolvents, 3-5 parts of de-agent promoters, 3.6-4.6 parts of surfactants and 200-230 parts of deionized water. The present invention proposes to prepare a water-based environmentally friendly alkaline paint stripper by selecting a high-boiling-point low-toxicity component, thereby achieving the technical effect of paint stripper environmental protection, and preparing a catalyst promoter at the same time, connecting a carbon shell with nano-iron tetroxide as the core, loading an alkaline metal oxide, and improving the degradation rate of the paint film, thereby reducing the paint stripping time and reducing the substrate loss.

The invention relates to a preparation method and application of a rare earth element-containing precious metal tritium oxidation catalyst. The preparation method comprises the following steps: preparing a gamma-Al2O3 carrier containing rare earth elements; and loading noble metal on the surface of the gamma-Al2O3 carrier by adopting a deposition-precipitation method to obtain the catalyst, immersing the catalyst into a solution containing a nonionic surfactant for surface modification; and roasting the modified catalyst to obtain the tritium oxidation catalyst. According to the invention, the catalytic performance under a high-humidity condition is improved by firstly loading the rare earth element, then loading the noble metal and finally modifying through the nonionic surfactant, and the low-temperature activity of the catalyst is improved through a composite active site formed by loading the rare earth element and the noble metal; and meanwhile, the reaction activity under the condition of low tritium concentration and the reaction activity under the conditions of high humidity and large air volume are also improved.

The present invention discloses a reforming hydrogen production catalyst and its preparation method and application. The present invention adopts polyvinyl alcohol, polyacrylamide, sodium polystyrene sulfonate, and lignin sulfonate polymer surfactants to prepare a MgO-Al2O3 composite carrier, and uses a polymer surfactant to adsorb on the surface of a magnesium source and an aluminum source, which slows down the aggregation of magnesium oxide or aluminum oxide during the calcination process, is conducive to calcining to form a MgO-Al2O3 composite carrier with specific pores, improves the loading condition of the composite carrier and the active components of the catalyst, improves the catalytic activity of the copper-based catalyst, methanol conversion rate, and improves the selectivity and heat resistance of CO. The present invention also adds a modifier, which can increase the surface oxygen vacancies and enhance the correlation between the active components and the carrier, further improving the activity and stability of the catalyst. The preparation method of the present invention is simple, easy to operate, less polluting, and easy to industrialize.

The application discloses a calcium carbide furnace tail gas deep purification process. The calcium carbide furnace tail gas is firstly subjected to wet desulfurization and dehydrocyanation and TSA treatment, and then sequentially enters a de-fluorine and de-hydrocyanation reactor, a hydrolysis desulfurization reactor, a fine desulfurization reactor, a de-phosphorus and de-arsenic reactor, a de-oxygen reactor and a de-hydrocarbon reactor. After the treatment process, the HCl content in the gas is less than 0.1 ppm, the HF content is less than 0.1 ppm, the HCN content is less than 0.1 ppm, the total sulfur content is less than 0.1 ppm, the AsH3 content is less than 5 ppb, the PH3 content is less than 5 ppb, the oxygen content is less than 10 ppm, and the unsaturated hydrocarbon content is less than 0.1 ppm, thereby meeting the separation and purification requirements of subsequent processes, and the pressure drop of the whole process is not more than 100 kPa. The process can remove oxygen and unsaturated hydrocarbons in the gas under low-temperature conditions, thereby reducing the occurrence of side reactions, and has the characteristics of reasonable process design, high purification precision, low energy consumption and low operation cost.

This invention belongs to the field of environmentally friendly fuel technology, specifically relating to a method for preparing a green, low-carbon, and highly efficient modified fuel for alcohol-hydrogen engines. This invention comprehensively improves fuel performance through a progressive synergistic architecture of a bio-methanol platform – an oxygen-containing combustion-promoting system – a stability barrier – and a low-energy-consumption blending path. Using bio-methanol as a base, it optimizes combustion by compounding with oxygen-containing components such as 2-MTHF and DMM / MF, achieving rapid ignition, emission reduction, and noise reduction. Phase behavior is regulated by isobutanol and polyether-modified silicon, achieving a reversible and stable phase without the need for high-HLB surfactants, preventing deposition and gas lock. A four-fold protective barrier is constructed using GMO and fluorinated silica polyethers, combined with antioxidant synergy to achieve corrosion resistance and aging resistance. The process adopts a sequential design of front-end purification – mid-stage two-phase construction – and end-stage static mixing, achieving low-energy homogenization and ensuring storage, transportation, and operational stability.

The present invention relates to an iron-based catalyst, a preparation method thereof, and an application thereof in the treatment of organic waste gas by heterogeneous catalytic oxidation. The iron-based catalyst comprises a MnO2 solid carrier and a catalyst active component loaded in the MnO2 solid carrier; the catalyst active component comprises Ag and Fe. The catalyst active component uses a metal salt solution as a precursor substance and is loaded on a carrier by an impregnation method. The catalyst of the present invention solves the problems existing in the existing commercial iron-based catalysts for heterogeneous catalytic oxidation, such as easy loss of iron ions, easy imbalance of catalyst component ratios, low catalyst activity at room temperature, and easy agglomeration of the catalyst. It can be applied to the scenario of heterogeneous catalytic oxidation treatment of organic waste gas for a long time.

The invention relates to the technical field of catalysts, and discloses a carbon dioxide methanation catalyst and a preparation method thereof, and a carbon dioxide methanation reaction method, the catalyst comprises a TiO2 carrier, and an auxiliary agent component and an active metal component loaded on the TiO2 carrier; wherein the TiO2 carrier comprises anatase type TiO2 (titanium dioxide) and rutile type TiO2 (titanium dioxide); the auxiliary agent component is selected from at least one of alkaline earth metal and rare earth metal; the active metal component is ruthenium. According to the carbon dioxide methanation catalyst provided by the invention, the mixture of anatase type TiO2 and rutile type TiO2 is adopted as the catalyst carrier, and through the synergistic effect of the TiO2 carrier, the auxiliary agent component and the active metal component, the dispersity and high-temperature stability of the active metal component can be improved, and the low-temperature activity of the catalyst in a carbon dioxide methanation reaction can be improved.

The invention discloses a preparation method and application of a Cu modified SAPO-34 composite material, relates to a preparation method of a catalyst for selective catalytic reduction of NO, and aims to solve the technical problems that active sites of an existing denitration molecular sieve catalyst Cu-SAPO-34 are easy to agglomerate, the low-temperature activity is poor, the hydrothermal stability is poor, and the water resistance and sulfur resistance are poor. The method comprises the following steps: weighing pseudo-boehmite, H3PO4, white carbon black, triethylamine, tetraethylenepentamine and a copper organic complex to prepare sol-gel; wherein the copper organic complex is copper acetylacetonate, copper glycinate or copper ethylenediamine dihydrate; and then the sol-gel is subjected to a hydrothermal reaction, an obtained precursor is calcined, and the Cu modified SAPO-34 composite material is obtained. The denitration conversion rate of the material at 150-430 DEG C can reach 90-100%, and the material has N2 selectivity, resists water vapor and sulfur dioxide, and can be used in the field of NH3-SCR denitration.

The present invention relates to the technical field of catalysts, and discloses a close-coupled SCR catalyst and a preparation method and application thereof, wherein the catalyst comprises a molecular sieve and indium oxide; the indium oxide is loaded on the surface of the molecular sieve in the form of particles; the indium oxide is A x In 1‑x O y , wherein A is one or more selected from Ce, La, Pr, Nb, Ga, Ni, Gd, Zn, Cr, Sr, and Zr; In is indium; O is oxygen; 0≤x<1, and y is determined by the chemical formula balancing method of indium oxide. The catalyst obtained by the present invention not only effectively improves the catalyst's resistance to hydrocarbon poisoning, solves the problem of catalyst deactivation due to hydrocarbon poisoning in the ccSCR system, but also improves the catalyst's low-temperature activity, broadens the active temperature window and N 2 Selective.

Provided is a novel catalyst for exhaust gas purification, which contains no Ce compound conventionally considered essential for low-temperature catalytic activity and is excellent in low-temperature oxidative activity. The catalyst is an oxidation catalyst for exhaust gas purification, including a base material and a catalyst layer provided on the base material, in which the catalyst layer includes first catalyst particles and second catalyst particles, the first catalyst particles each include a first carrier particle containing a rare earth element other than cerium; and palladium (Pd) which is carried by the carrier particle, and the second catalyst particles each include a second carrier particle; and platinum (Pt) and palladium (Pd) which are carried by the carrier particle.

The application relates to the technical field of sewage treatment, and discloses a biological filter rotating disc system based on replaceable composite fillers and a nitrogen and phosphorus removal method. 2+ The biological filter rotating disc system supports online filler replacement and is suitable for upgrading and reconstruction of sewage plants and advanced treatment of industrial wastewater.

The invention relates to the technical field of environmental catalysis, and discloses a preparation method and application of a Mn-based composite oxide oxygen storage body catalyst, the catalyst is an oxygen storage body catalyst formed by doping, replacing or compounding manganese oxide (MnOx) with another metal oxide (MO), the catalyst has the following general formula: aMO-bMnOx, the mass composition is as follows: 0-90% of a, 0-100% of b, 0-10% of x, 0-10% of x, 0-10% of x, 0-10% of x, 0-10% of y, 0-10% of y, 0-10% of y, 0-10% of y, 0-10% of y, 0- the manganese oxide is selected from at least one of manganese monoxide, manganese dioxide, manganese sesquioxide, manganous-manganic oxide, manganous anhydride, manganese anhydride and high manganese anhydride. The Mn-based composite oxide catalyst provided by the invention is a typical oxygen storage material, has abundant oxygen vacancies and oxygen storage / release capability, and shows the advantages of high low-temperature activity, water vapor resistance, good stability and the like in the catalytic combustion removal process of trace ethylene and formaldehyde. The preparation method is simple, raw materials are easy to obtain, large-scale production is facilitated, the cost is low, and the industrial application value is remarkable.

The application discloses a kind of cobalt-containing multimetal bimodal pseudo-boehmite and its preparation method, and the preparation steps include: when pseudo-boehmite is prepared using hydrothermal method, water-soluble cobalt compound and water-soluble silver compound are added to aluminum source;Then through forming, shade drying, drying and calcination treatment obtain multimetal improved pseudo-boehmite finished product, and non-metal modifier is added in the forming process;Multimetal improved pseudo-boehmite finished product is immersed in potassium citrate solution, and acid-base adjustment is carried out to increase the basicity of carrier;Multimetal improved pseudo-boehmite after acid-base adjustment is used as carrier and is immersed in aqueous solution of molybdenum compound;Finally, after shade drying, drying and calcination, cobalt-containing multimetal bimodal pseudo-boehmite catalyst is obtained.The preparation method designed by the application makes the distribution of cobalt and molybdenum in the catalyst more uniform, and the molybdate impregnation process is simple and controllable, which is conducive to improving the performance of the catalyst.

The application discloses a low-temperature denitration catalyst and a preparation method thereof, and belongs to the technical field of flue gas denitration catalysts. 60 The catalyst is prepared by doping fullerene C 60 The pi electron system of C 60 is highly delocalized on the three-dimensional curved surface thereof, so that C 60 has excellent electron transfer capacity; and the doping proportion of C 60 can effectively promote the rapid progress of the catalytic reaction. Therefore, the catalyst prepared by the application can be applied to low-temperature flue gas denitration, can significantly improve the denitration efficiency, can widen the active temperature range of the catalyst, and can solve the problems of poor low-temperature activity, insufficient sulfur resistance and easy poisoning of traditional catalysts.

The invention discloses a catalyst for preparing a nano carbon material from methane and a preparation method of the catalyst, a hydroxycarboxylic acid chelating agent and polyhydroxy alcohol are added into an active component solution of various active metal salt components at one time to obtain a precursor, and then the precursor is dried and roasted to obtain the catalyst. The catalyst with multiple active components is prepared by adopting a polymer precursor method, and perovskite type metal oxide is selected as a carrier of an active substance, so that relatively strong interaction between metal and the carrier exists between the active components and the metal oxide carrier, and uniform dispersion and size control of catalyst particles are realized; the low-temperature activity and the carbon deposition resistance of the catalyst are improved, so that the low-temperature preparation of the nano carbon material is realized.

The present invention relates to a CO 2 A catalytic conversion catalyst and a preparation method and application thereof. The preparation method of the catalyst comprises the following steps: firstly weighing a silicon source, an aluminum source and an inorganic acid aqueous solution to form a white sol, then centrifuging, washing and drying to obtain a white silicon-aluminum composite oxide powder, then adding a binder, rolling and forming a ball to obtain a silicon-aluminum composite oxide carrier precursor; then weighing a first active component precursor, a second active component precursor and an auxiliary component precursor, and loading them on the silicon-aluminum composite oxide carrier precursor by impregnation, drying and calcining to obtain a CO 2 Catalytic conversion catalyst. Compared with the prior art, the catalyst of the present invention has a 2 It has the advantages of high activity, high selectivity and high stability in the reverse water-gas shift reaction.

The invention relates to the technical field of green methanol preparation processes, in particular to a controllable micro-channel reactor green methanol preparation method based on low-temperature plasma activation, which comprises the following steps: (1) preparing a micro-channel reactor; (2) preparing a catalyst, wherein the catalyst comprises a main catalyst Cu / ZnO / Al2O3 and a cocatalyst rare earth doped CeO2; (3) preparing a micro-channel wall surface coating; (4) generating low-temperature plasma; (5) introducing a mixed gas of CO2, H2 and Ar into the microchannel reactor, and reacting at the temperature of 120-180 DEG C and the pressure of 3-5 MPa at the air speed GHSV of 5000-10000 h <-1 >; (6) adjusting reaction parameters in real time by adopting an intelligent control system; and (7) obtaining a high-purity methanol product, and realizing efficient activation of CO2 and H2 under relatively mild conditions by adopting a dielectric barrier discharge (DBD) plasma technology.

The invention discloses a sulfur-tolerant methanation catalyst which comprises the following components in percentage by mass: a carrier modifier, an active component, an auxiliary agent and a carrier, the invention also discloses a preparation method of the sulfur-tolerant methanation catalyst, which comprises the following steps: firstly, carrying out nitrogen doping treatment on the carbon nanotubes CNTs; secondly, mixing nitrate with Al2O3 and the nitrogen-doped carbon nanotube powder, carrying out precipitation reaction and roasting, dipping the obtained composite modified carrier in an ammonium thiomolybdate solution, and roasting to obtain a catalyst precursor; and finally, dipping in a mixed solution, roasting and passivating to obtain the sulfur-tolerant methanation catalyst. According to the invention, the composite carrier is adopted, so that the composite carrier has better dispersing performance and can promote the dispersion of the active components, and the adopted active auxiliary agent is also beneficial to dispersing and stabilizing the active components. The activity of the catalyst can be improved in sulfur-tolerant methanation reaction, the catalyst also has the characteristics of excellent heat-conducting property, electron transfer property and the like, and meanwhile, the low-temperature activity and high-temperature resistance of the catalyst are improved.