153 results about "Hydrogen transfer" patented technology

The invention belongs to the technical field of catalysts, and particularly relates to a supported catalyst as well as a preparation method and application thereof. The preparation method of the supported catalyst provided by the invention comprises the following steps: mixing soluble transition metal salt, a carrier, an alkaline aqueous solution and water, and dipping to obtain a primary catalyst; the soluble transition metal salt comprises transition metal oxalate, transition metal formate or transition metal citrate; and carrying out microwave roasting on the primary catalyst to obtain the supported catalyst. According to the method, the transition metal salt is used as a roasting precursor, the transition metal is subjected to in-situ reduction in the reducing atmosphere generated during thermal decomposition of the transition metal salt in the roasting process, roasting and reduction are completed through microwave roasting one-step heating, the preparation steps are simplified, and meanwhile energy consumption is reduced. The supported catalyst is used in a catalytic condensation coupling hydrogen transfer reaction, has high conversion rate and coupling product selectivity, and can stably operate for a long time.

The invention discloses a method for preparing a single-benzene-ring liquid chemical through solvent-free hydrogenation degradation of polystyrene waste plastics based on a bifunctional catalyst. According to the method, Nb2O5 is taken as a carrier, 1-3wt% of noble metal ruthenium is loaded to prepare a bifunctional catalyst, and high-molecular-weight polystyrene is efficiently degraded into single-benzene-ring liquid chemicals such as benzene, methylbenzene and ethylbenzene through hydrogenation reaction under a solvent-free condition. Precious metal ruthenium hydrogenates a polystyrene long chain to generate a short-chain hydrocarbon intermediate, then a carrier # imgabs0 # acid site drives beta-cracking and hydrogen transfer reaction, and a single-benzene-ring product is directionally generated through the synergistic effect of the short-chain hydrocarbon intermediate and the carrier # imgabs0 # acid site. The method has the advantages of no solvent, reduced equipment cost, high reaction efficiency, simple reaction operation, mild reaction conditions, simple catalyst preparation process, high activity, selectivity and good stability, and is suitable for industrial production, and no other solvents preempt acidic sites. The method not only can realize cyclic utilization of resources, but also can alleviate the current environmental pollution problem.

A hydrogen storage and delivery system delivering storing and dispensing cryogenic liquid and gaseous hydrogen, comprising cryogenic liquid hydrogen storage vessels with heaters 1, 2, 3, ambient tempe

The invention discloses a chiral alpha alkyl beta hydroxyl phosphate compound as well as a preparation method and application thereof, and belongs to the technical field of chemical synthesis. In the presence of a catalyst, carbonyl of a substrate is reduced into hydroxyl to obtain a chiral alcohol compound, alpha-alkyl beta-ketophosphonate is reduced by an asymmetric catalytic hydrogen transfer method, and a reduced product can be used as a core skeleton of various drug molecules, so that the chiral alcohol compound is prepared. The compound has an obvious promotion effect on migration and repair of keratinocytes, and has great application potential in the aspects of wound healing, skin tissue soothing, repair, aging resistance and the like.

The invention relates to a method for synthesizing tetrasubstituted ‑1,3‑enedicarboxylic acid, and discloses a method for synthesizing tetrasubstituted ‑1,3‑enedicarboxylic acid. The method comprises the following steps: using 1,3‑enyne and iodide as raw materials, potassium formate as a formate source, DABCO as a hydrogen transfer catalyst, Ir(bpy)2(dtbpy)PF6 as a photocatalyst, and cesium carbonate as a base, introducing CO2 under normal pressure, and obtaining an enedicarboxylic acid compound with an excellent to good yield under room temperature and visible light irradiation for 24 hours. The method has mild reaction conditions, good regioselectivity, and good functional group tolerance, and makes up for many deficiencies of the prior art.

The invention relates to the technical field of NADPH regeneration and the technical field of antidepressant drug synthesis, and discloses a method for catalytically synthesizing (S)-3-chloro-1-phenyl-1-propanol by driving a WO3-based photoenzyme catalyst through infrared light, and the method comprises the following steps: step S1, preparing an oxygen-deficient WO3 nanosheet; s2, preparing a NaCBR carbonyl reductase (NaCBR carbonyl reductase); s3, mixing the oxygen-deficient WO3 nanosheet and NaCBR carbonyl reductase according to the mass ratio of (1: 0.5)-(1: 2), and stirring for 3-6 hours to obtain the photo-enzyme catalyst (WO3 / NaCBR). According to the method, artificial photosynthesis, namely a method for driving NADPH regeneration, is utilized, other materials are not additionally used as hydrogen transfer and electron transfer media, and the (S)-3-chloro-1-phenylpropanol is catalytically synthesized by utilizing infrared light to drive a photo-enzyme catalyst (WO3 / NaCBR). The method can greatly reduce the cost, is green and environment-friendly, has high catalytic efficiency and mild reaction conditions, is simple to operate, is easy to recover and recycle, and is suitable for large-scale industrial production and application.

The invention discloses a catalyst for preparing cyclohexanone by cyclohexanol dehydrogenation coupled phenol hydrogenation, the catalyst has a composite metal hydrotalcite structure, the metal components comprise ruthenium, magnesium and aluminum, the metal components are uniformly dispersed in hydrotalcite, and the ruthenium, the magnesium and the aluminum respectively account for 1-5wt%, 10-30wt% and 1-10wt% of the total mass of the catalyst. The acid-base property, the specific surface area and the pore structure of the catalyst are optimized by adjusting the ratio of magnesium to aluminum, so that the dispersion of ruthenium is improved, the interaction between ruthenium and a hydrotalcite carrier is increased, and the synergistic effect of all the element components enables active centers in cyclohexanol dehydrogenation, hydrogen transfer and phenol hydrogenation processes to be efficiently combined together, so that the catalytic activity of the catalyst is improved. Rich alkaline sites are generated in the catalyst, the dehydration side reaction of cyclohexanol can be effectively inhibited, meanwhile, the selectivity of cyclohexanone prepared through phenol hydrogenation is improved, it is ensured that the phenol hydrogenation reaction and the cyclohexanol dehydrogenation reaction can be effectively coupled, and cyclohexanone is efficiently prepared.

The invention discloses a catalytic cracking catalyst containing alkaline metal and rare earth as well as a preparation method and application of the catalytic cracking catalyst, and belongs to the technical field of catalysts. The catalytic cracking catalyst containing the alkaline metal and the rare earth comprises 5-35% of a phosphorus-silicon composite binder, 10-60% of a shape-selective cracking molecular sieve, 0-25% of other molecular sieves, 0.01-5% of an alkaline metal compound in terms of oxide, 0.2-5% of a rare earth compound in terms of oxide, 0-15% of activated aluminum oxide and the balance of natural clay, wherein the total percentage is 100%. The phosphorus-silicon composite binder is prepared from the following components in percentage by weight: 15 to 55 percent of P2O5, 10 to 45 percent of SiO2 and 0.1 to 3 percent of RE2O3. The prepared catalytic cracking catalyst containing the alkaline metal and the rare earth not only improves the catalytic cracking activity of light hydrocarbon, but also is suitable for cracking of naphtha and mixed C4 raw materials, and can obviously reduce the hydrogen transfer activity in the reaction process, so that the yield of alkane such as methane and ethane is reduced, and the yield of diene is effectively improved.

The invention provides a composite hydrogen transfer catalyst based on an MOFs material as well as a preparation method and application of the composite hydrogen transfer catalyst. The composite hydrogen transfer catalyst comprises the MOFs material loaded with an active metal component and solid alkali, the active metal component is selected from at least one of palladium, platinum, ruthenium, rhodium and nickel; the active metal component accounts for 0.5-5% of the mass of the catalyst; the MOFs material is selected from at least one of ZIF-8, MIL-101, UiO-66, HKUST-1 and MOF-5 (Metal Organic Frameworks); the solid alkali is selected from at least one of magnesium oxide, calcium oxide, hydroxyapatite and barium oxide. The catalyst provided by the invention has the advantages of high catalytic activity, good selectivity, strong stability, reusability and the like, can efficiently catalyze fatty alcohol to perform hydrogen transfer reaction under a lower-temperature reaction condition to prepare Guerbet alcohol, remarkably improves the yield and purity of a product, and reduces the reaction energy consumption and cost.

The invention discloses a method for preparing phenolic chemicals by using a cobalt-based nitrogen-carbon composite material to catalyze lignin transfer hydrogenolysis. According to the method, organic soluble lignin is taken as a raw material, a cobalt-based nitrogen-carbon composite material is taken as a catalyst, small organic molecule alcohol and formic acid are taken as a mixed solvent, the reaction temperature is kept at 210-250 DEG C, the reaction time is 2-6 hours under the inert gas atmosphere of 0.5-3 MPa, lignin depolymerization can be catalyzed to obtain a series of p-hydroxyphenyl products, and high-value utilization of lignin is realized. The conversion rate of the lignin reaches up to 89.6%, the total yield of monophenol products can reach 17.7%, the yield of p-hydroxyphenyl products reaches 9.0%, and the selectivity reaches 50.8%. The catalyst used in the invention is simple in preparation process, and can catalyze short-chain alcohol and carboxylic acid solvent hydrogen transfer depolymerization lignin under mild conditions to obtain high value-added chemicals such as p-hydroxyphenyl products and the like.

The invention provides a preparation method of (S)-1-(2, 6-dichlorophenyl) ethanol, which is characterized in that a biological catalytic synthesis method is adopted, a coenzyme circulation system formed by coenzyme, a hydrogen donor and dehydrogenase is used for catalytic reduction of a substrate 2 ', 6'-dichloroacetophenone, and the substrate 2 ', 6'-dichloroacetophenone is converted into a target product. And after the hydrogen transfer step is finished, recovering the coenzyme to the oxidation state, and circularly putting the coenzyme into the oxidation reaction of the hydrogen donor. According to the synthesis route provided by the invention, high-risk hydrogenation operation in a traditional method is avoided, nitrogen protection is not used, and the reaction is carried out under mild and safe conditions. The purity of the product prepared by the method is as high as 99%, and the product has double benefits of high yield and low cost.

The application relates to a CuO-ZnO-ZrO2@CeO2 core-shell catalyst and a preparation method and application thereof in preparing methanol. The preparation method is as follows: copper nitrate and zinc nitrate are dissolved in deionized water to form a mixed solution, a precipitant is added, and hydrothermal reaction is carried out to obtain copper-zinc nanoscale dispersed particles; then the particles are dispersed in deionized water, a zirconium nitrate aqueous solution is added, and hydrothermal reaction is carried out to precipitate zirconium on the outer layer of the particles; then a cerium nitrate aqueous solution and a precipitant are added to the system, and hydrothermal reaction is carried out; after the reaction, the system is subjected to filtration, washing, drying, grinding and calcination to obtain the CuO-ZnO-ZrO2@CeO2 core-shell catalyst. In the application process, CO2 and H2 are used as raw materials, cyclohexanol is used as a solvent, hydrogenation reaction is carried out under the action of the core-shell catalyst at 190-210 DEG C, and methanol is prepared. The core-shell catalyst can be applied to hydrogen transfer hydrogenation for preparing methanol, and can exhibit excellent catalytic activity and stability and higher methanol selectivity.

The present invention primarily relates to a coordination complex obtained or obtainable by a process as defined herein and to a process for producing a coordination complex as defined herein. Moreover, the present invention relates to a coordination complex as defined herein. The present invention further relates to the use of a coordination complex obtained or obtainable according to the process as defined herein or of a coordination complex as defined herein as a catalyst. Finally, the present invention relates to a process, preferably a hydrogen transfer reaction, more preferably for the isomerization of a double bond in a substrate, as defined herein.

The invention provides a method for producing ethylene and propylene by catalytic conversion of a heavy raw material, which comprises the following steps: introducing a catalyst A containing a Y-type molecular sieve, a modified MSE structure molecular sieve and a modified ZSM-5 molecular sieve into a first reaction zone of a riser to react with the heavy raw material; the separated C4-C12 non-aromatic hydrocarbon component enters a fluidized bed reactor to react with a preheated catalyst B containing a modified MSE structure molecular sieve and a modified ZSM-5 molecular sieve, and a partial carbon deposition catalyst B which is reacted with the C4-C12 non-aromatic hydrocarbon component (light petroleum hydrocarbon) and forms slight carbon deposition is introduced into the middle part of a second reaction zone of the riser; a first oil agent mixture (an intermediate product of heavy raw oil cracking) is preferentially reacted with the catalyst B, so that the concentration of the catalyst B in the second reaction zone is improved, the hydrogen transfer activity of the catalyst in the second reaction zone is reduced, the generated propylene is prevented from further generating propane, the propylene selectivity is improved, the ethylene and propylene selectivity is improved, and the yield is high.

The present invention belongs to the field of catalyst technology, and specifically discloses an organic hydrogen transfer aid for propane dehydrogenation and a synthesis method thereof. The preparation method described in the present invention is to first coat the surface of a quinone material (L) with a layer of SiO2, and then perform a hydrothermal crystallization treatment to form an S-1 molecular sieve shell to obtain an L@S-1 material. Through the confinement of the molecular sieve pores, the quinone material can realize a hydrogenation-dehydrogenation cycle at a higher reaction temperature. When the material is used in combination with a noble metal propane dehydrogenation catalyst, a series reaction of propane dehydrogenation and hydrogenation of the quinone material is realized, the hydrogen partial pressure of the propane dehydrogenation process is reduced, and the thermodynamic equilibrium limit is broken through, thereby realizing a propane dehydrogenation reaction at a lower reaction temperature. The reduction in reaction temperature will bring about advantages such as reduced energy consumption and increased catalyst stability.

The present invention belongs to the field of chemical catalysis technology, and discloses a method for preparing m-methylbenzyl alcohol. The present invention provides a route and corresponding catalyst for directly producing m-methylbenzyl alcohol from low-carbon alcohol aldehydes through hydrogen transfer or dehydrogenation-coupling-aromatization reaction. The selectivity of m-methylbenzyl alcohol is as high as 47.7%, and the selectivity of m-methylbenzaldehyde is 4.6%. m-methylbenzaldehyde can be converted into m-methylbenzyl alcohol by simple hydrogenation. Mild reaction conditions avoid the generation of excessive oxidation products. The reaction route produces hydrogen as a by-product, which is a clean energy source. The route also generates high-carbon chain alcohols, which are easy to separate by distillation and can be used as fuels or oil additives. In addition, the route also generates o- and p-methylbenzyl alcohols and methylbenzaldehyde, which can be used in the fields of spices, medicine, cosmetics, pesticides, etc.

The application discloses a method for hydrogen transfer reaction by using a micro-reactor device, wherein the micro-reactor device comprises a liquid pipeline system, a gas pipeline system, a micro-reactor and a cooling and product collecting system; the top of the micro-reactor is communicated with the liquid pipeline system and the gas pipeline system respectively, and the bottom of the micro-reactor is connected with the cooling and product collecting system; the method comprises the following steps: filling Pt / Al2O3 catalyst in the reaction tube of the micro-reactor; first pumping inert gas into the micro-reactor to discharge air in the micro-reactor, and then continuously pumping raw material liquid formed by mixing alcohol compound of formula I and amine compound of formula II into the micro-reactor to carry out reaction; the reaction liquid flows out of the micro-reactor and then enters the cooling and product collecting system to be collected, so as to obtain product of formula III. The micro-reactor is used to carry out hydrogen transfer reaction, and higher product yield is obtained.

The invention discloses a preparation method of a copper-mediated multi-active-site catalyst and application of the copper-mediated multi-active-site catalyst in thermal dissolution polymerization of low-rank coal, copper nitrate, cobalt nitrate and cerous nitrate are dissolved in deionized water in proportion, heated and stirred to be uniform, and a sodium hydroxide solution is dropwise added for co-precipitation to obtain turbid liquid; and carrying out low-temperature crystallization, high-temperature hydrothermal treatment, centrifugal washing to be neutral, vacuum drying, grinding into powder, high-temperature calcination, cooling and hydrogen reduction to finally obtain the Cu / CoOx-CeO2 catalyst. The catalyst has the advantages of excellent hydrogenation reduction capacity, high product selectivity, low preparation cost and the like, and low-rank coal depolymerization can be realized in various reaction solvents; for hydrogenation reaction of dimer or monomer model compounds such as 2-phenoxy-1-phenethyl alcohol, not only can catalytic transfer hydrogenolysis of C-O bonds be realized in low-carbon alcohol, but also intramolecular self-hydrogen transfer hydrogenolysis can be realized by utilizing self structural characteristics of a substrate, so that the atom utilization rate is increased.

The invention relates to a fuel cell system with hydrogen separation and hydrogen regeneration capabilities. A fuel cell system including an electrochemical hydrogen pump (EHP) and a polymer electrolyte membrane fuel cell (PEMFC) is provided. The EHP includes a first membrane electrode assembly having a first electrolyte membrane, an anode, a cathode, and a bipolar plate, while the PEMFC includes a second membrane electrode assembly having similar components. The hydrogen gas generated by the EHP is supplied to the anode of the PEMFC for power generation. The system is characterized by high temperature operation, effective hydrogen transfer via a silica binder, and an optimized bipolar plate made of graphitic carbon having a low resistance and thermoset resin content. The system ensures efficient power generation with minimal hydrogen loss and operates without the need for additional mechanical or electrical auxiliary equipment components.

The invention provides a catalytic cracking method for highly producing ethylene and propylene from hydrocarbons, which comprises the following steps: (1) introducing preheated raw materials and water vapor from the lower part of a reactor, contacting with a catalyst and reacting to obtain a reaction oil agent; the reactor at least comprises two reaction zones, namely a first reaction zone and a second reaction zone from bottom to top, the average solid content of a catalyst in the first reaction zone is greater than 0.2, and the average solid content of a catalyst in the second reaction zone is less than 0.1; (2) carrying out gas-solid separation on the reaction oil agent to obtain a carbon deposit catalyst and oil gas; and separating the oil gas to obtain a product comprising ethylene and propylene. In the initial stage of the reaction, a dense-phase reaction zone is adopted to increase the contact between hydrocarbon molecules and the active center of the catalyst, so that the proportion of catalytic cracking reaction is remarkably increased, and the thermal cracking reaction degree is reduced; a dilute phase reaction zone is adopted at the reaction tail end, reconversion of generated ethylene and propylene is reduced, hydrogen transfer reaction and condensation reaction are reduced, and the yield ratio of diene / (methane + coke) is greatly increased.

The application discloses an electrochemical double hydrogenation three-cell system, which comprises a chemical cell, an anode cell, a cathode cell, an ion exchange film, a palladium film, and a power supply; the palladium film serves as an anode electrode, and a first nano-porous palladium alloy catalyst is coated on one side of the surface of the palladium film; a cathode electrode is arranged in the cathode cell, and the cathode electrode is a second nano-porous palladium alloy catalyst; the system generates adsorbed hydrogen by electro-oxidation of a second organic substrate in the anode cell on the surface of the palladium film through the anode electrode; the adsorbed hydrogen is transferred to the chemical cell through the characteristics of the palladium film body phase hydrogen transfer, and the hydrogenation of the organic substrate is realized on the surface of the first nano-porous palladium alloy catalyst; meanwhile, the cathode electrode generates adsorbed hydrogen by hydrolysis on the surface of the second nano-porous palladium alloy catalyst to realize the hydrogenation of the organic substrate, and finally the electrochemical double hydrogenation of the organic matter is realized; experimental results show that when the three-cell system is applied to organic hydrogenation, the faraday efficiency is as high as 200%, and meanwhile, the system has excellent stability and ultralow energy consumption.

The invention relates to core-shell structure zeolite containing a ZSM-5 zeolite shell as well as a preparation method and application of the core-shell structure zeolite. The core-shell structure zeolite containing the ZSM-5 zeolite shell comprises spherical nuclear-phase zeolite and a shell layer wrapping the nuclear-phase zeolite, wherein the shell layer is continuous and compact ZSM-5 zeolite, and the ratio of the average particle size of the ZSM-5 zeolite to the average thickness of the shell layer is 9-32. The core-shell structure zeolite containing the ZSM-5 zeolite shell has a continuous and compact ZSM-5 zeolite shell layer, high pore channel smoothness exists between a nuclear phase and a shell phase, and when the core-shell structure zeolite containing the ZSM-5 zeolite shell is used in a catalytic cracking reaction, high reaction activity of nuclear-phase zeolite can be maintained, the selectivity of a target product low-carbon olefin can be improved, and the selectivity of side reactions such as hydrogen transfer can be reduced; meanwhile, a macromolecular aromatic hydrocarbon product generated by the nuclear-phase zeolite can be continuously cracked into a micromolecular BTX product in the shell ZSM-5 zeolite in the outward diffusion process, so that the BTX selectivity is improved.

The present invention discloses a ZSM-5 molecular sieve catalyst, a preparation method thereof and an application thereof. The properties of the catalyst are as follows: the ratio of the amount of framework aluminum at the intersection of the straight pore channels and the sinusoidal pore channels to the amount of framework aluminum in the straight pore channels and in the sinusoidal pore channels is 1.4:1 to 10:1, and the micropore pore volume accounts for 70% to 92% of the total pore volume. When the catalyst of the present invention is used in the reaction of catalytic cracking of olefins to produce propylene and ethylene, it has the characteristics of low reaction hydrogen transfer index, high stability, high raw material olefin conversion rate, and high selectivity of the products propylene and ethylene.

This invention discloses a method, system, and application for producing linear α-olefins from waste high-density polyethylene (HDPE). The method includes: subjecting waste HDPE to a first pyrolysis treatment to obtain volatile gaseous substances; subjecting the volatile gaseous substances to a second pyrolysis treatment, separation treatment, and condensation treatment sequentially to obtain a product including linear α-olefins; wherein, by mass percentage, the waste HDPE comprises the following components: 80-90% HDPE, 5-10% polypropylene, 1-5% polystyrene, and 2-5% impurities. This invention employs a continuous two-stage pyrolysis process, significantly improving the heat and mass transfer efficiency of the pyrolysis process, greatly reducing secondary reactions, and enabling high-temperature-promoted hydrogen transfer reactions, thereby continuously and efficiently producing mixed linear α-olefin products. It has advantages such as a relatively simple preparation process and a relatively concentrated product distribution.

The invention discloses a method for preparing light aromatic hydrocarbon by catalytic pyrolysis of waste polypropylene plastics, which comprises the following steps: by taking a hollow ZSM-5 molecular sieve as a carrier, loading metal Ga by an ion exchange method, introducing Zr by an impregnation method to obtain a zirconium-gallium modified hollow ZSM-5 molecular sieve catalyst, and carrying out two-stage ex-situ reaction process, firstly, deeply depolymerizing the polypropylene plastics to obtain the light aromatic hydrocarbon. Macromolecular long-chain hydrocarbon is converted into micromolecular short-chain hydrocarbon, so that a more suitable reactant is provided for subsequent aromatization; then short-chain hydrocarbon is fully diffused in pore channels of the zirconium-gallium modified hollow ZSM-5 molecular sieve, and is subjected to hydrogen transfer and aromatization reaction under the synergistic effect of acidic sites of the molecular sieve. Meanwhile, the introduction of nitrogen or carbon dioxide atmosphere inhibits the generation of alkane by-products caused by hydrogen transfer to a certain extent, and further improves the selectivity of aromatic hydrocarbon.

Provided are a multilayer resin pipe suitable for use in a water electrolysis system operating at high voltage, a water electrolysis system provided with this multilayer resin pipe, and a hydrogen transfer method using this multilayer resin pipe. The multilayer resin pipe has: an electrically insulating main pipe; an electrically insulating pressure resistant layer covering an outer surface of the main pipe; an electrically insulating gas barrier layer covering an inner surface of the main pipe; and an electrically insulating elution suppressing layer covering an inner surface of the gas barrier layer.

The present invention relates to a hydrogen transfer pipe having excellent high-pressure resistance and bending characteristics. Specifically, the present invention relates to a hydrogen transfer pipe having excellent high-pressure characteristics that does not expand or deform due to the high pressure of hydrogen being transferred, satisfies bending characteristics required for long-distance hydrogen transfer, and can reduce installation costs.

The invention relates to the technical field of organic synthesis, in particular to a deuterated quinoxalinone diaryl methane compound as well as a synthesis method and application thereof. According to the invention, hydrogen transfer of quinoxalinone N = Csp2-H and proton coupling electron transfer of p-methenone are induced by bromine free radicals, and a free radical-free radical cross coupling pathway is established between imine free radicals and diaryl methane free radicals, so that a series of quinoxalinone diaryl methane intermediates are synthesized; and carrying out selective H / D exchange on the site of a tert-benzyl C-H bond of the intermediate through a bromine free radical to obtain a series of highly deuterated quinoxalinone diaryl methane derivatives. A one-pot method is adopted to continuously construct a carbon-carbon bond and a carbon-deuterium bond, the deuterated quinoxalinone diaryl methane derivative which has potential drug activity and can be used for preparing antitumor drugs is obtained, the advantages of high reaction efficiency and atom and step economy are manifested, and the problems of metal residues and the like caused by the use of a transition metal catalyst are avoided.

The invention discloses an applicability evaluation method, system and device for a natural gas pipeline hydrogen transfer material, and relates to the technical field of applicability evaluation of pipeline hydrogen transfer materials, and the method comprises the steps: determining the initial state information, operation status and high consequence area distribution condition of a pipeline to be transferred; pipeline integrity detection and evaluation are carried out, and the pipeline integrity condition and high-risk point distribution are determined; determining a sampling position and a sampling number of a pipeline test evaluation site; determining a current performance condition, a hydrogen stress intensity factor and a fatigue crack growth rate of the pipeline; and predicting the degradation trend and residual life of the pipeline based on a pipeline integrity evaluation result, comprehensively evaluating by combining a material conventional performance test result and a hydrogen compatibility test result, determining the applicability of the pipeline to be transferred, and proposing a suggestion for transferring hydrogen from the pipeline. By using the method, the material applicability of the in-service natural gas pipeline for transferring the high-pressure hydrogen can be effectively evaluated, and suggestions are provided for the implementation of a hydrogen transferring project of the in-service natural gas pipeline.

The application discloses a polymer-coated mesoporous silica supported ruthenium catalyst and a preparation method and application thereof. The catalyst has a polymer-coated mesoporous silica inner core, wherein the surface of the silica inner core is grafted with triethoxysilane having an alkenyl group; the alkenyl group of the triethoxysilane serves as an active site; the polymer is formed by polymerization of a polymer monomer through the alkenyl group; and the catalyst is formed by further coordination of metal Ru. The particle size of the catalyst is between 400 nm and 600 nm. The supported ruthenium catalyst provided by the application can catalyze hydrogen transfer reduction of carbonyl compounds at a high yield (up to 99%) and high enantiomeric selectivity (up to 99%), can be recycled for 8 times through simple recovery, and is easy to be industrialized, and can reduce catalyst cost and pollution.