2792results about "Hydrocarbons" patented technology

The invention relates to the technical field of catalyst carriers, and discloses reticular porous spherical aluminum oxide as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) mixing an aluminum source, acid, a pore-forming agent, a surfactant and water to obtain pseudo sol; (2) performing ultrasonic treatment and oil ammonia column forming treatment on the pseudo sol obtained in the step (1) to obtain gamma-Al2O3 spherical gel beads; and (3) aging, washing, drying and calcining the gamma-Al2O3 spherical gel beads obtained in the step (2) to obtain the reticular porous spherical alumina. The spherical aluminum oxide prepared by the method has abundant communicated reticular pore channels, is obviously distributed in mesopore and macropore ranges, is beneficial to obviously improving dispersion and loading of a catalyst in an aluminum oxide carrier and improving the performance of petroleum reforming and propane dehydrogenation, and has industrial production utilization value and commercial value.

The invention belongs to the technical field of solid waste utilization, and particularly relates to a modified ZSM-5 molecular sieve catalyst and a preparation method and application thereof. The catalyst comprises a ZSM-5 molecular sieve and an active component, wherein the active component is loaded on the internal pore channel and the surface of the ZSM-5 molecular sieve; the active component comprises one or more of Zn, Fe, Ni, Co, Mo and Zr. By adjusting the loading capacity of the active components and the acidity of the catalyst and adjusting the interaction among the components of the catalyst, the high-density polyethylene plastic is used as a raw material, and the catalyst is simple in structure, single in element, free of oxygen element and low in by-product content; the modified ZSM-5 molecular sieve catalyst is simple in preparation process and low in production cost, and the catalyst takes high-density polyethylene plastic as a raw material, so that the yield of MAHs prepared by directional pyrolysis of the high-density polyethylene plastic as the raw material and the stability of the catalyst are effectively improved.

The invention belongs to the technical field of alkane processing, and particularly relates to a process for preparing isopentene by dehydrogenation of isopentane, a catalyst and a tert-amyl alcohol preparation process. The process for preparing isopentene by dehydrogenation of isopentane comprises an isopentane dehydrogenation device and an isopentene separation device, in the isopentane dehydrogenation device, a dehydrogenation reactor is a fixed bed adiabatic reactor and is filled with a Pt-Sn-K / alumina type alkane dehydrogenation catalyst, the catalyst has hydromethanation performance under the CO2-containing dehydrogenation reaction condition, and the arrangement and operation of a dehydrogenation reactor group comprise a mode A, a mode B or a mode C; the isopentene separation device comprises a cooling separation system, a pressure swing adsorption separation system and an optional rectification system. The tert-amyl alcohol is further prepared from isoamylene under the conditions of a fixed bed hydration reactor, ethylene glycol monobutyl ether and other solvents, and the tert-amyl alcohol product is obtained through separation. The process is superior to the prior art on the whole, and has certain application prospects.

The invention discloses an ether polymerization inhibitor special for a butadiene extraction system and a preparation method of the ether polymerization inhibitor. The ether polymerization inhibitor comprises the following raw materials: a polymerization inhibitor intermediate, a solvent and a dispersing agent, the production process comprises the following steps: preparing a polymerization inhibitor intermediate, preparing a solvent, compounding, feeding and mixing, filtering, removing impurities and detecting. According to the method, firstly, a polymerization inhibitor 701 and diethylene glycol normal pressure etherification process is adopted, and beta-hydroxyethyl methyl ether is introduced to seal a terminal group, so that the power consumption is reduced, the generation of byproducts is inhibited, the solubility of an intermediate acetonitrile is improved to be greater than or equal to 30g / L, and the anti-interference performance is greatly enhanced; the solvent doped with a small amount of silane modified nano diatomite is prepared, impurities can be adsorbed, metal ions can be chelated, the dispersing agent can be assisted to be evenly distributed, the problems that a pure water solvent is single in function and the dispersing agent is prone to agglomeration are solved, and the polymerization inhibition efficiency and the stability of an extraction system are guaranteed.

A gas separation system for producing a CH4-enriched gas from a feedstock gas containing CO2 and CH4, including a first gas separation membrane unit and a second gas separation membrane unit, in which the gas separation system includes a feedstock gas supply line connected to a gas inlet of the first gas separation membrane unit; a compression part disposed in the feedstock gas supply line; a first line connecting the retentate gas outlet of the first gas separation membrane unit and the gas inlet of the second gas separation membrane unit; a second line connecting the permeate gas outlet of the second gas separation membrane unit and the feedstock gas supply line; and a cooling part for lowering the operating temperature of the second gas separation membrane unit below the operating temperature of the first gas separation membrane unit.

The invention discloses a chromium catalyst for propane dehydrogenation and a preparation method and application thereof, the catalyst is composed of an active component Cr2O3, an auxiliary agent, a modifier and an Al2O3-ZrO2 complex, the modifier is Y or Nd, and the auxiliary agent is at least one of Mn2O7, In2O3, CoO, OsO4 and MoO3. The catalyst is high in catalytic activity, strong in anti-coking capability, good in stability, low in cost and high in economical efficiency.

The invention provides an all-silicon molecular sieve confined Pt-based bimetallic catalyst and application thereof in preparation of propylene through propane dehydrogenation. The preparation method comprises the following steps: mixing a silicon source, a template agent, a Pt precursor, an auxiliary element Cu precursor and the like by adopting an in-situ synthesis method, synthesizing under a hydrothermal condition, washing, drying, roasting and reducing to obtain the Pt-based bimetallic molecular sieve catalyst. According to the present invention, the pure silicon molecular sieve Silicalite-1 (S-1) is adopted as the carrier, such that the good carrier characteristics of high thermal stability, low acidity, rich pore structure and the like are provided, and the silicon hydroxyl group (Si-OH) in the S-1 pore channel can further provide the metal species anchoring effect so as to easily disperse and limit the active site; and the Cu auxiliary agent improves the metallicity of Pt. The synergy of the two significantly improves the performance of propylene preparation by direct dehydrogenation of propane. The synthesized PtCu-coated S-1 catalyst is low in Pt loading capacity, Pt and Cu are highly dispersed, side reactions such as deep dehydrogenation of propylene can be inhibited, and good stability is achieved.

The invention discloses a metal modified molecular sieve catalyst and a preparation method and application thereof. The catalyst is a metal-loaded molecular sieve which is modified by post-treatment after a metal component is loaded on the molecular sieve; the molecular sieve is selected from at least one of H-ZSM-5, H-Beta, H-ZSM-35, H-MOR, H-MCM-22, H-ZSM-11 and H-ZSM-22, and the molecular sieve is selected from at least one of H-ZSM-5, H-Beta, the metal is loaded on the molecular sieve through ion exchange and / or impregnation; the post-treatment modification is selected from at least one of heating treatment, water vapor treatment and silanization treatment. The metal component of the catalyst can catalyze dehydrogenation reaction and carbon dioxide activation, the molecular sieve component provides a substance diffusion channel and an acid center, and post-treatment modification can regulate the distribution of the molecular sieve acid center and improve the hydrothermal stability of the catalyst. The catalyst can efficiently promote the coupling reaction of cycloalkane and carbon dioxide, the selectivity of aromatic hydrocarbon reaches 90% or above, and the conversion rate of carbon dioxide reaches 20% or above.

The invention relates to a heterogeneous catalysis technology, and aims to provide a method for improving the yield of components of aviation kerosene prepared by ethylene oligomerization through combination of a fixed bed and a slurry bed. Comprising a fixed bed reactor and a slurry bed reactor which are sequentially connected in series, the fixed bed reactor is filled with a metal modified mesoporous zeolite molecular sieve catalyst, and the slurry bed reactor is filled with a mesoporous zeolite molecular sieve catalyst. The method comprises the following steps: firstly, carrying out ethylene oligomerization reaction in a fixed bed reactor to generate a product containing C4-C8 olefin; the reaction product is directly introduced into the fixed bed reactors connected in series for secondary reaction, and the final product comprises C5-C16 + liquid phase olefin as an aviation fuel component. By adopting a fixed bed-slurry bed reactor combined method, the ethylene conversion rate can be greatly improved; secondary oligomerization is carried out by using an acidic mesoporous zeolite molecular sieve catalyst, so that the selectivity of aviation kerosene components is improved; the mesoporous catalyst prepared by an alkali treatment method has a good diffusion effect and keeps high activity for a long time.

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 relates to a method for synthesizing mesitylene by gas-phase non-hydroisomerization of unsym-trimethylbenzene, which comprises the following step of: contacting the unsym-trimethylbenzene with a catalyst under a gas-phase non-hydroisomerization reaction condition in the presence of the catalyst, wherein the catalyst is an EWT structure molecular sieve, the total pore volume of the EWT structure molecular sieve is 0.20-0.51 cm < 3 >. G <-1 >, and the mesoporous volume is 0.11-0.37 cm < 3 >. G <-1 >. According to the method disclosed by the invention, the EWT structure molecular sieve with an ultra-large pore channel structure is adopted as the catalyst, and when the catalyst is used for synthesizing mesitylene through unsym-trimethylbenzene gas-phase non-hydroisomerization, the distribution conditions of raw materials and products are improved, the conversion rate of unsym-trimethylbenzene and the selectivity and the mass yield of mesitylene are improved, heavy component carbon deposition is slowed down, and the yield of mesitylene is improved. The service life of the catalyst is prolonged.

A machine learning model predicts a K value for a new iron ethylene oligomerization catalyst structure, where the K value has not yet been experimentally determined. The system utilizes a device comprising memory coupled to at least one processor, the memory having instructions that cause the at least one processor to: input a set of reaction conditions and a new iron ethylene oligomerization catalyst structure comprising a ligand to a random forest machine learning regressor model, wherein the random forest machine learning regressor model is trained on a data set comprising multi-dimensional features for tested iron ethylene oligomerization catalyst structures, wherein the multi-dimensional features comprise experimental K values, physical features, molecular features, and connective steric factors for each of the tested iron ethylene oligomerization catalyst structures

The invention provides an efficient technological method and system for preparing aromatic hydrocarbon through CO2 hydrogenation. The process method comprises the following steps: 1) mixing feed gas containing CO2 and H2 with recycle gas to obtain a mixture flow, and carrying out first-stage reaction on the mixture flow after heat exchange heating to obtain a first-stage reaction product; 2) performing heat exchange and separation on the primary reaction product to obtain a water phase, a gas phase and an oil phase, discharging the water phase out of the system, compressing most of the gas phase to obtain continuous circulating gas, and circulating the circulating gas back to the step 1) to continue the reaction; a small part of gas phase is discharged as purge gas; 3) distilling out light hydrocarbon from the top of the tower by rectifying the oil phase to obtain aromatic hydrocarbon-rich oil from a tower kettle; 4) heating the light hydrocarbon and then carrying out secondary reaction to obtain a secondary reaction product; and 5) carrying out heat exchange and separation on the secondary reaction product to obtain a gas-phase product and a liquid-phase product, discharging the gas-phase product as purge gas, and circulating the liquid-phase product back to the light component removal tower for rectification and separation to obtain aromatic hydrocarbon-rich oil. The first-stage reaction realizes high per-pass conversion of CO2, and the two-stage reaction is coupled to realize high selectivity of aromatic hydrocarbon.

The invention discloses a catalytic method for converting alpha-olefin in an alkane-olefin mixture into internal olefin and application, raw materials and a solid acid catalyst are carried out in a fixed bed or a reaction kettle, the reaction temperature is 50-150 DEG C, the reaction pressure is 15-400 psi, and the reaction environment is an inert gas atmosphere; when the reaction is carried out on the fixed bed, the mass space velocity of the solid acid catalyst is 1h <-1 >-20h <-1 >; when the reaction is carried out in the reaction kettle, the conversion frequency of the raw materials is 5000 mol substrate mol acid site density <-1 > h <-1 > to 50000 mol substrate mol acid site density <-1 > h <-1 >; wherein the raw material is an alkane-alkene mixture; the solid acid catalyst comprises an active component and a carrier, wherein the carrier contains at least one inorganic oxide; the active component has a structure as shown in a formula (1) and / or a formula (2), in the formula (1) and the formula (2), R is alkyl or phenyl, and n is greater than or equal to 1. According to the catalysis method provided by the invention, the conversion rate of alpha-olefin can be increased, and the proportion of skeleton isomerization products and oligomers in internal olefin products can be reduced.

The present application relates to the field of molecular sieve catalyst, disclose a kind of preparation method of 3D printing molecular sieve catalyst and the 3D printing molecular sieve catalyst prepared and application, the method is by hydrothermal crystallization to silicate ceramic carrier in crystallization incubation fluid, it can be obtained on silicate ceramic carrier good dispersion, catalytic activity high molecular sieve, preparation process is simple, can not depend on mold to form complex three-dimensional structure, the structure precision of molecular sieve catalyst prepared is high, the content of molecular sieve in catalyst is high, metal in catalyst is supported on molecular sieve, molecular sieve is exposed to the outer surface of catalyst, metal site and molecular sieve acidic active site both have higher accessibility, and catalytic activity is high.

The invention discloses an ethylene dimerization catalyst composition and application thereof, the catalyst composition mainly comprises a cocatalyst and a main catalyst, the cocatalyst comprises the following raw materials by mole: 41%-90% of an aluminum-based compound, 9%-41% of a polymerization inhibitor A1, and 0.9%-16% of a dispersant B1; the main catalyst comprises the following raw materials: 13%-50% of a titanium-based compound, 50%-78% of a polymerization inhibitor A2 and 0%-7.9% of a dispersing agent B2, and the ethylene dimerization catalyst composition comprises a co-catalyst mainly composed of an aluminum-based compound, a polymerization inhibitor A1 and a dispersing agent B1 and a main catalyst mainly composed of the titanium-based compound, the polymerization inhibitor A2 and the dispersing agent B2. The polymerization inhibitor A1, the polymerization inhibitor A2, the dispersing agent B1 and the dispersing agent B2 are introduced, so that the catalyst has higher catalyst activity, generation of scaling polymers is effectively reduced, the catalyst can be used for producing 1-butene through ethylene dimerization, and the problem that a large number of polymers are produced as by-products in current industrial production can be effectively solved.

The present application relates to the technical field of ZSM-5 molecular sieve preparation, and provides a high-crystallinity aluminum-rich ZSM-5 molecular sieve, a preparation method and application thereof.The preparation method of the high-crystallinity aluminum-rich ZSM-5 molecular sieve provided by the present application realizes the skeleton composition control of the ZSM-5 molecular sieve by adding a second aluminum source and then performing secondary crystallization, solves the technical bottleneck that it is difficult to directly synthesize the high-crystallinity aluminum-rich ZSM-5, breaks through the lower limit of the Si / Al ratio phase region of the artificial in-situ synthesis of the molecular sieve, effectively controls the crystal parameter and improves the production efficiency, realizes the precise construction of the high-crystallinity aluminum-rich ZSM-5 molecular sieve, and thus enhances the micropore crystallinity of the molecular sieve, optimizes the acid distribution, greatly enriches the metastable surface active acid center distribution of the molecular sieve, and has good aromatic hydrocarbon conversion performance.

The invention relates to the technical field of reactors, in particular to a partition annular electric heat tracing radial propane dehydrogenation reactor and a heating method thereof.The partition annular electric heat tracing radial propane dehydrogenation reactor comprises a reactor shell, a reaction cavity is formed in the reactor shell, and a heat preservation layer is arranged in an interlayer in the reactor shell; the radial bed layer structure is arranged in the reaction cavity and comprises an inner cylinder and an outer cylinder which are concentrically arranged, as well as a catalyst bed layer and an electric heat tracing system which are filled between the inner cylinder and the outer cylinder, and the electric heat tracing system comprises a plurality of electric heat tracing assemblies and a power supply module; the temperature control system comprises temperature sensors arranged in the annular heating areas in a distributed mode and a controller. Compared with the prior art, the electric heat tracing assembly is directly buried in the catalyst bed layer, energy is supplied to all the areas through the independent power supply branch circuits, power is independently adjusted through the controller, partition differentiation heat compensation can be implemented according to the difference that heat dissipation of the outer ring is higher and heat absorption of the inner ring is higher, and the radial temperature difference and local temperature fluctuation of the bed layer are remarkably reduced.

Methods for preparing catalysts for oxidative dehydrogenation (ODH) of alkanes such as ethane are provided. An exemplary method includes forming a slurry including metal oxides; one or more of a bismuth compound, an antimony compound, and a tellurium compound; a reducing agent; and water; and heating the slurry to form the catalyst. The metal oxides include an oxide of molybdenum and an oxide of vanadium. The bismuth compound includes bismuth oxide, bismuth hydroxide, or a bismuth carbonate. The antimony compound includes an oxide of antimony, an antimony acetate, or an antimony ethoxide. The tellurium compound includes tellurium dioxide. The reducing agent includes molybdenum dioxide and may further include vanadium dioxide. The methods use all inorganic reagents, with no build up COx pressure observed during the hydrothermal synthesis.

The invention discloses a system and a method for preparing low-carbon olefin through carbon dioxide adsorption and in-situ oxidative dehydrogenation. The invention provides a system and a method for integrating carbon dioxide capture and in-situ oxidation low-carbon alkane (ethane / propane) dehydrogenation, a bifunctional material is composed of an adsorbent and a catalyst, and capture of carbon dioxide and in-situ oxidation low-carbon alkane dehydrogenation can be realized in the same reaction tower, so that the highest one-way carbon dioxide conversion rate can reach 100%, and the conversion rate of carbon dioxide can reach 100%. And meanwhile, the ethylene yield reaches 26%. According to the method, the problems of additional product separation and product gas recycling caused by low carbon dioxide conversion efficiency in the prior art are avoided, and effective heat management is realized, so that the process of integrating carbon dioxide capture and preparing low-carbon olefin by oxidizing low-carbon alkane has more economic advantages.

The invention discloses a graded porous mordenite catalyst as well as a preparation method and application thereof, and belongs to the technical field of heterogeneous catalysis and chemistry and chemical engineering. The preparation method comprises the following steps: carrying out hydrolysis-polycondensation reaction on a silicon source, an aluminum source, an alkali source and water, after the reaction is completed, adding an alpha, omega-biquaternary ammonium salt surfactant as a template agent, and carrying out template-oriented self-assembly reaction to obtain gel; carrying out hydrothermal crystallization treatment on the gel to obtain zeolite raw powder; roasting the zeolite raw powder for the first time to remove the template agent so as to obtain roasted zeolite; and carrying out ion exchange treatment on the roasted zeolite, and roasting again to obtain the graded porous mordenite catalyst. According to the invention, the alpha, omega-biquaternary ammonium salt surfactant is used as the template agent to prepare the hierarchical porous structure catalyst with both inherent micropores and uniform mesopores, so that mass transfer can be improved and acidic sites can be optimized.

A hydrogen production system for producing a hydrogen gas product includes a geologic hydrogen source configured to provide a feedstock comprising hydrogen, nitrogen, and helium and purification equipment comprising two or more of: a pressure swing adsorption (PSA) device; a guard bed; a separation membrane; a reactive membrane; or a cryogenic separation device. The purification equipment is configured to receive the feedstock from the geologic hydrogen source and produce a hydrogen gas product, and production of the hydrogen gas product exhibits a carbon intensity score less than 3.0 kg CO2 eq / kg H2.

The invention belongs to the technical field of low-carbon dehydrogenation aids, and particularly relates to a heat balance aid as well as a preparation method and application thereof. The heat balance auxiliary agent comprises Al, Ca, Si, Cu and Mn elements existing in an oxide form; wherein the Al2O3, the CaO and the SiO2 jointly form a skeleton structure of the auxiliary agent, and the CuO and the MnO2 are used as active components and are attached to the skeleton structure; the molar ratio of metal elements in the heat balance auxiliary agent is as follows: Al: Ca: Si: Cu: Mn = (49-78.9): (15-25): (1-10): (5-15): (0.1-1). The heat balance additive prepared by the invention shows excellent anti-sintering capability, long service life and stable heat supply performance under harsh reaction conditions such as propane dehydrogenation, and can effectively improve the selectivity of target olefin and reduce the generation of byproducts such as methane.

The invention belongs to the field of catalyst preparation, and particularly relates to a platinum-based bimetallic propane dehydrogenation catalyst and a preparation method thereof. The method comprises the following steps: firstly, weighing beta molecular sieve powder, adding into a concentrated nitric acid solution, stirring and refluxing at high temperature, centrifugally washing, and drying to obtain a dealuminated beta molecular sieve; then calcining the metal additive oxide powder and the dealuminated beta molecular sieve in a reducing atmosphere to obtain composite beta molecular sieve powder; then weighing platinum precursor salt, dissolving the platinum precursor salt in ultrapure water to form a solution, and then adding ethylenediamine for coordination; and finally, impregnating the composite beta molecular sieve with a platinum precursor solution, and carrying out aging, drying and high-temperature treatment to obtain the dealumination beta molecular sieve loaded platinum-based bimetallic catalyst. According to the method provided by the invention, the metal is spontaneously and highly dispersed on the carrier by utilizing the capturing effect of the beta molecular sieve silanol nest on the metal and combining the dynamic migration behavior of the metal under high-temperature reduction. The prepared catalyst shows extremely high propane conversion activity and selectivity at 600 DEG C, and is excellent in stability.

The invention relates to the technical field of C9 heavy aromatics, in particular to a method and device for producing mesitylene from C9 heavy aromatics, and the method comprises the following steps: firstly, in the presence of a catalyst, mixing the C9 heavy aromatics with hydrogen, performing dealkylation isomerization reaction and dehydrogenation separation to obtain a liquid-phase product, and then performing two-stage separation on the liquid-phase product to obtain mesitylene. And mesitylene is produced to the maximum extent. The C9 heavy aromatics are subjected to selective dealkylation and trimethylbenzene isomerization reaction, and the obtained product does not contain propylbenzene, and the content of methyl-ethylbenzene is 1t; the method has the advantages that the yield of mesitylene is more than or equal to 0.2%, the interference of methyl ethyl benzene on the separation of the mesitylene is eliminated, the loss of the mesitylene is small, the one-way yield of the mesitylene is more than or equal to 12%, the reaction process is simple, the mesitylene and unsym-trimethylbenzene products are high in purity, the unsym-trimethylbenzene can be recycled to further increase the yield of the mesitylene, the process is flexible, byproducts are few, the product value is high, and the utilization value of C9 heavy aromatic hydrocarbon resources is obviously improved.

The invention provides a nickel metal hydroisomerization catalyst as well as a preparation method and application thereof. The catalyst comprises nickel, an alumina carrier and a molecular sieve, the nickel is loaded on the alumina carrier, and the content of the nickel in the catalyst is 1-10wt%; the molecular sieve is an SAPO molecular sieve. According to the invention, alumina is used as a carrier, non-noble metal nickel is loaded through a wet immersion method and is mixed with the molecular sieve to prepare the alkane isomerization catalyst, so that active metal with smaller particle size and higher dispersity can be provided, metal agglomeration at high temperature is avoided, and the utilization rate of metal is increased; the catalyst with excellent catalytic activity can be obtained only by loading low-content nickel metal, the catalyst has higher catalytic activity and selectivity, the obtained product contains more isomers, and the low-temperature fluidity of the product can be remarkably improved.

A method may include contacting a hydrocarbon-containing feed with a catalyst in a reactor to form an olefin-containing effluent, then at least partially separating the olefin-containing effluent from the catalyst. Passing the catalyst to a combustor and heating the catalyst by combusting a supplemental fuel. The supplemental fuel includes methane in an amount greater than or equal to 1 mol. %. Passing the catalyst from the combustor to the reactor, such that at least a portion of the catalyst continuously cycles between the reactor and the combustor. The catalyst includes from 0.1 wt. % to 10 wt. % of one or more metals chosen from gallium, indium, thallium or combinations thereof, from 5 ppmw to 1000 ppmw of one or more metals chosen from platinum, palladium, rhodium, iridium, ruthenium, osmium, or combinations thereof, from 100 ppmw to 30000 ppmw of chromium, and at least 85 wt. % support.

The present invention relates to a non-noble metal long-chain alkane dehydrogenation catalyst, which uses CeO2 and a transition metal M as main active components, and the mass percentage of the transition metal M is 0-30 wt%; wherein M is one or a combination of more of Fe, Co and Ni. Meanwhile, the invention also discloses a preparation method and application of the catalyst. The catalyst provided by the invention shows good dehydrogenation activity and stability in an inert atmosphere. An alternative solution which is low in cost, high in performance and easy to operate is provided for a long-chain alkane dehydrogenation process.

A preparation method of a platinum-boron aluminum catalyst for dehydrogenation of methylcyclohexane comprises the following steps: step 1, taking aluminum nitrate nonahydrate, adding CTAB (cetyltrimethyl ammonium bromide), and pouring absolute ethyl alcohol into a beaker A; adding boric acid and deionized water into a beaker B, and pouring the solution in the beaker B into the beaker A; slowly dropwise adding ammonia water into the beaker A, then adding absolute ethyl alcohol, and aging; evaporating the solution in the beaker A, drying in a drying oven, and finally putting in a muffle furnace; preparing a B-O-Al carrier with a large specific surface area; step 2, putting the B-O-Al carrier with the large specific surface area and absolute ethyl alcohol into a beaker, then adding a chloroplatinic acid solution, then putting the beaker into ultrasonic waves for oscillation, and then putting the beaker into a drying oven for drying to obtain a Pt / B-O-Al (unreduced) catalyst; and putting the Pt / B-O-Al (unreduced) catalyst into a tubular furnace, and reducing the Pt / B-O-Al (unreduced) catalyst under the condition of H2 to finally obtain the Pt / B-O-Al catalyst. The catalyst has the characteristics that the low-temperature requirement is low, the sintering inactivation resistance is high, and high-efficiency, long-life and stable dehydrogenation can be realized under the low Pt loading capacity (1wt%).

A catalyst includes from 5 ppmw to 1000 ppmw of platinum, from 0.1 wt. % to 10 wt. % of gallium, from 2300 ppmw to 30000 ppmw of iron, and at least 85 wt. % support, wherein the support includes one or more of alumina, silica, or combinations thereof.