51 results about "Alcohol synthesis" patented technology

The invention discloses a preparation method of a carbon shell confinement type nickel-bismuth-titanium composite catalyst and application of the carbon shell confinement type nickel-bismuth-titanium composite catalyst in high alcohol synthesis, and belongs to the technical field of catalysts. The preparation method of the carbon shell confinement type nickel-bismuth-titanium composite catalyst comprises the following steps: dissolving nickel salt, titanium dioxide and citric acid in water to form a homogeneous solution; adding bismuth salt into the homogeneous solution, and drying to obtain a precursor; and roasting the precursor to obtain the carbon shell confinement type nickel bismuth titanium composite catalyst. The carbon shell confinement type nickel-bismuth-titanium composite catalyst provided by the invention shows excellent catalytic performance in a reaction system for synthesizing high-carbon alcohol through carbon-carbon coupling of water-phase alcohol molecules. According to the catalyst, the high-carbon alcohol yield can reach 45.04% while high organic phase selectivity is maintained, and compared with a traditional nickel-bismuth-based catalyst, the high-carbon alcohol yield is remarkably improved.

The invention discloses a high-stability carbonyl reductase mutant and application of the high-stability carbonyl reductase mutant in chiral alcohol synthesis. An amino acid sequence as shown in SEQ ID NO.2 is mutated as follows: 20th leucine is replaced by any one of lysine, threonine, aspartic acid or isoleucine, and / or 55th leucine is replaced by any one of methionine, serine, lysine or isoleucine, and / or 55th leucine is replaced by any one of methionine, serine, lysine or isoleucine. Compared with a wild type enzyme, the stability of the obtained mutant is remarkably improved, particularly, single-point mutants Mut-L20I and Mut-L55I and a combined mutant Mut-L20I-L55I show excellent relative enzyme activity, thermal stability and substrate tolerance. The mutant has high catalytic activity and stability to various chiral alcohols, has the advantages of high catalytic efficiency, high thermal stability, strong substrate tolerance, easiness in fermentation production and the like, and is suitable for industrial application of enzymatic synthesis of chiral alcohols.

The invention discloses a carbon-coated nickel-based super-hydrophobic catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts and high alcohol synthesis. The preparation method comprises the following steps: dissolving nickel salt and citric acid in water, and then heating and stirring the obtained mixed solution to obtain a precursor; roasting the precursor in an inert atmosphere to obtain a carbon-coated nickel-based catalyst; and carrying out ball-milling mixing on the carbon-coated nickel-based catalyst and polytetrafluoroethylene to obtain the carbon-coated nickel-based super-hydrophobic catalyst. According to the invention, the carbon-coated nickel-based catalyst is firstly prepared, then the carbon-coated nickel-based catalyst is coupled with the hydrophobic polymer polytetrafluoroethylene to form a new super-hydrophobic catalyst, and the nickel-based catalyst and the polytetrafluoroethylene are subjected to ball-milling mixing, so that the hydrophobic property of the nickel-based catalyst is improved, the water poisoning phenomenon of the catalyst is relieved, and further coupling of low-carbon alcohol to higher alcohol is promoted; the yield of the high alcohol and the selectivity of the C6 < + > high alcohol are improved, and the method has a wide application prospect.

The invention provides hydrocarbon synthesis equipment and a hydrocarbon synthesis process. The hydrocarbon synthesis equipment comprises an alcohol synthesis unit and an alcohol-to-hydrocarbon section, the apparatus and process incorporate a reforming system for treating C1-C4 paraffins and / or olefins enriched by-product streams produced in the apparatus and process to provide a reformer-based syngas stream that is sent to the inlet of an alcohol synthesis unit.

The invention relates to the technical field of absolute ethyl alcohol synthesis, and discloses an absolute ethyl alcohol synthesis production monitoring and control system, which integrates a reaction kettle monitoring module, a synthesis equipment module and an intelligent control module, and realizes comprehensive monitoring and intelligent control of an absolute ethyl alcohol synthesis process. The reaction kettle monitoring module collects data such as temperature, pressure, liquid level and reactant concentration in real time, and a basis is provided for intelligent control. The synthesis equipment module comprises a reaction kettle, a stirrer, a heating / cooling device and a rectifying tower and is responsible for synthesis and purification of absolute ethyl alcohol. The intelligent control module constructs an absolute ethyl alcohol synthesis decision-making model, models a synthesis process into a Markov decision-making process, and automatically adjusts an equipment working mode according to real-time data and preset parameters so as to optimize production. According to the system, the energy utilization efficiency is effectively improved, the production cost is reduced, and safe production is ensured.

The invention provides a method for catalytically synthesizing phytosterol ester by using ionic liquid modified magnetic nano composite material immobilized lipase, which comprises the following steps: taking imidazolium ionic liquid modified magnetic beta-cyclodextrin organic-inorganic nano composite material immobilized lipase as a catalyst; esterification of phytosterol and fatty acid is catalyzed in a solvent-free system to synthesize the phytosterol ester. The carrier prepared by the method combines the characteristics of good biocompatibility of the beta-cyclodextrin and the ionic liquid, capability of stabilizing the active conformation of enzyme and the like, and also combines the characteristic of easy separation of a magnetic material. The immobilized enzyme has the characteristics of convenience in separation, high catalytic activity, good stability and the like, and can be used for catalyzing esterification reaction of phytosterol and fatty acid to prepare phytosterol ester. The invention provides a novel green and efficient phytosterol ester synthesis method.

The invention relates to the technical field of alcohol synthesis catalysts, in particular to a doped Cu-based catalyst, a preparation method and application of the doped Cu-based catalyst in the aspect of ethanol synthesis. The preparation method comprises the following steps: S1, pretreating mesoporous silica; s2, loading zinc ions on the pretreated mesoporous silica; s3, converting the zinc ions loaded on the mesoporous silica into zinc oxide; s4, treating the mesoporous silica adsorbed with zinc oxide through EDTA (Ethylene Diamine Tetraacetic Acid); s5, performing fixed-point adsorption on the copper ions by zinc oxide on the mesoporous silica; s6, mesoporous silica is removed through alkali treatment, and the doped Cu-based catalyst is prepared through heating reduction. According to the doped Cu-based catalyst prepared by the invention, copper ions and zinc oxide are uniformly distributed, so that the catalytic efficiency of the material on synthesis gas is effectively improved.

The present disclosure relates to a process of preparation of 2-amino alcohol of formula I comprising: i) reacting 2-hydroxyketone or 2-hydroxyaldehyde of formula II in presence of an aminating agent and a solvent under condition to obtain imine intermediate; and ii) processing by hydrogenation the imine intermediate in presence of a metal catalyst and H2 under condition to obtain 2-amino alcohol of Formula I.

The invention provides a biomass gas and green liquid fuel production method and system. The production method of the fuel gas and the green liquid fuel comprises the following steps: S1, carrying out anaerobic fermentation on biodegradable wastes to obtain biomass fuel gas and solid biogas residues; s2, gasifying the high-calorific-value waste to obtain synthesis gas; and S3, purifying the synthesis gas, and then carrying out alcohol synthesis and / or oil synthesis on the purified synthesis gas and green hydrogen to obtain an alcohol raw material / fuel and / or sustainable aviation fuel. According to the biomass fuel gas and green liquid fuel production method and system, biomass waste in a regional range can be treated in a full quantification mode through reasonable configuration, meanwhile, green hydrogen is consumed through energy supply of the system to produce the green liquid fuel, and the purpose that long-distance transportation is easy after distributed fuel gas is converted into the liquid fuel is achieved.

Technology to convert syngas into aviation fuel is described. Some variations provide a process comprising: providing a starting syngas stream comprising H2 and CO; purifying the syngas feed stream, if necessary; feeding the clean syngas stream to an alcohol-synthesis reactor, to catalytically convert syngas to a C1-C10 mixed-alcohol stream; feeding the C1-C10 mixed-alcohol stream to a dehydration reactor, to catalytically convert C1-C10 mixed alcohols to C2-C10 mixed olefins; feeding the mixed olefins to an oligomerization reactor, to catalytically convert the C2-C10 mixed olefins to C5-C16 mixed hydrocarbons; feeding the C5-C16 mixed hydrocarbons and hydrogen to a hydrogenation reactor, to catalytically hydrogenate C═C double bonds within the C5-C16 mixed hydrocarbons, thereby generating stabilized C5-C16 mixed hydrocarbons; and recovering the stabilized C5-C16 mixed hydrocarbons as aviation fuel. In preferred embodiments, the aviation fuel is sustainable aviation fuel (SAF) under ASTM D7566-24a.

The invention provides a system and a method for preparing chemical products by using blast furnace gas and coke oven gas. The system comprises a coke oven gas hydrogenation device, a coke oven gas desulfurization device, a blast furnace gas hydrolysis device, a blast furnace gas desulfurization device, a reforming device and an alcohol synthesis device, wherein a discharge port of the coke oven gas hydrogenation device is connected with a feed port of the coke oven gas desulfurization device, a discharge port of the blast furnace gas hydrolysis device is connected with a feed port of the blast furnace gas desulfurization device, and a discharge port of the coke oven gas desulfurization device and a discharge port of the blast furnace gas desulfurization device are respectively connected with a feed port of the reforming device. And a discharge port of the reforming device is connected with a feed port of the alcohol synthesis device. The system can fully and effectively utilize methane and carbon dioxide contained in blast furnace gas and coke oven gas.

The method specifically comprises the following steps: adding a copper source and a magnesium source into deionized water, stirring and dissolving, dropwise adding a silicon source and a template agent, keeping uniform, continuously dropwise adding a NaOH solution, and finally stirring at room temperature for 3-5 hours to form gel; transferring the obtained gel into an autoclave for hydrothermal crystallization reaction, taking out a sample, washing the sample with deionized water, carrying out vacuum drying in a vacuum drying oven, calcining the dried sample in a muffle furnace, removing the template agent, and reducing the dried sample in reducing gas to obtain the catalyst Cu / Mg-MCM-22, filling a reaction tube with the prepared catalyst Cu / Mg-MCM-22, placing the reaction tube in a fixed bed reactor, introducing shielding gas, and pumping coal alcohol for reaction. By synthesizing the copper-based catalyst Cu / Mg-MCM-22 and using the coal-based alcohol as the raw material, the synthesis process is simple in reaction process, economical and practical, and the catalyst is high in acetaldehyde selectivity, good in stability and long in service life.

The invention relates to the technical field of organic alcohol synthesis, and discloses a method for synthesizing isononyl alcohol. The method comprises the following steps: (1) mixing octylene, a rhodium catalyst and a phosphine ligand, then introducing synthesis gas into the obtained mixture, and carrying out hydroformylation reaction to obtain isononanal; (2) in the presence of a hydrogenation catalyst, mixing the isononanal with hydrogen for hydrogenation reaction; wherein the phosphine ligand is selected from two or more of triphenyl phosphite, tris (2, 4-di-tert-butylphenyl) phenyl phosphite, triphenylphosphine, 6, 6 '-{[5, 5'-dimethoxy-3, 3 '-bis (2-methyl-2-propyl)-2, 2'-biphenyl diyl] bis (oxy)} bis [dibenzo (d, f) (1, 3, 2) dioxaphosphoheptane] and 4, 5-bis (diphenylphosphine)-9, 9-dimethyl xanthene. According to the method, the conversion rate of mixed octylene in the hydroformylation process and the selectivity and yield of isononyl aldehyde can be remarkably improved, so that the yield of isononyl alcohol is improved, reaction conditions are mild, and the method has remarkable economic value and wide industrial application prospects.

The invention discloses a method for producing bio-based dihydric alcohol. According to the method, bio-based methyl 2-tetrahydrofuroate, tetrahydrofurfuryl propionate and methyl 2-(tetrahydrofuran-2-yl) acetate are used as precursors for dihydric alcohol synthesis, Cu-Ga-Mn / SiO2 or Cu-Ga-Mn / SiO2-Al2O3 is used as a hydrogenation catalyst, cyclic ether ester structures are synchronously activated in a fixed bed reactor, ester group hydrogenation and tetrahydrofuran ring opening are synergistically carried out, and the high-purity tetrahydrofuran is obtained. The reaction path is shortened. The hydrogenation catalyst is prepared by combining a sol-gel method and hydrothermal synthesis through roasting and reduction, active components are uniformly distributed, and the hydrogenation catalyst has excellent hydrogenation activity and structural stability.

The utility model discloses an efficient distillation and separation device for side chain alcohol synthesis, which relates to the technical field of distillation and separation devices and comprises a device table, an electric heating round seat is integrally formed at the upper end of the device table, a seat leaning plate is arranged on one side of the electric heating round seat, and the seat leaning plate and the device table are of an integral structure. An electric push rod is fixedly arranged on the outer wall of one side of the seat leaning plate through a screw; the distillation retort is mounted in the electric heating round seat, a top sealing cover is arranged right above the distillation retort, a vacuum suction pump is arranged at the rear end of the electric heating round seat, and a suction pipe of the vacuum suction pump is communicated with the interior of the distillation retort; the condensation tank is arranged on one side of the distillation tank, and the problem that the side-chain alcohol synthesis effect is affected due to the fact that the existing distillation device lacks protection on thermosensitive substances in the using process and the thermosensitive substances needed by side-chain alcohol synthesis can be decomposed by the distillation device for side-chain alcohol synthesis is solved.

The present application relates to a kind of green alcohol and green ammonia co-production system and method based on traditional coal methanol device and high temperature fuel cell electrolytic cell, belong to fuel cell technical field.The green alcohol and green ammonia co-production system includes: raw material pretreatment and vaporization module, coal gas purification module, methanol synthesis and gas-liquid separation module, SOFC power generation and CO2 enrichment module, SOEC electrolysis module, green alcohol synthesis module and green ammonia synthesis module.The green alcohol and green ammonia co-production system is through "electric-chemical-carbon" synergic cycle, simultaneously solves renewable energy consumption and high carbon chemical decarburization two big problems, realizes green alcohol and green ammonia efficient co-production.

The present invention discloses a membrane separation method for recovering purge gas from organic alcohol synthesis, relating to the technical field of hydrogen recovery in hydrogen-rich gas systems. The method comprises: using a gas separation composite membrane comprising a porous support and a hybrid membrane layer formed on the surface of the porous support, formed by mixing a polymer phase with gas separation properties with a functional inorganic oxide phase; the gas separation composite membrane exhibits an H2 / N2 separation factor greater than 28 and an H2 / CO2 separation factor greater than 5.5. The membrane separation method for recovering purge gas from organic alcohol synthesis provided by the present invention has superior gas separation performance, higher hydrogen recovery efficiency, better economic benefits, and broad application prospects.

The invention relates to the technical field of penetrant JFC preparation, and discloses a double-metal cyanide catalyst and a preparation method thereof, and a preparation method of low-carbon fatty alcohol polyether. The preparation method of the double-metal cyanide catalyst comprises the following steps: mixing soluble transition metal salt, cyano metal salt, a reaction medium and a dispersing agent, and then reacting in an inert atmosphere, wherein the cyano metal salt is K3 [M (CN) 6], and the metal M is selected from at least one of Co, Fe and Cr. The double metal cyanide catalyst can effectively reduce the temperature for synthesizing polyether from low-carbon alcohol, has high catalytic reaction activity, and can reduce free alcohol residues in the reaction process. Meanwhile, the catalyst does not react with the initiator to generate water, so that the generation of a polyethylene glycol byproduct can be reduced.

The invention provides a higher alcohol synthesis catalyst capable of being mixed with ship fuel as well as a preparation method and application of the higher alcohol synthesis catalyst, and belongs to the technical field of catalysts. The preparation method comprises the following steps: dissolving nickel salt and bismuth salt in deionized water, and stirring to form a homogeneous solution; adding CeO2 into the homogeneous solution, stirring, and drying to obtain a precursor; and roasting the precursor in an inert atmosphere to obtain the higher alcohol synthesis catalyst capable of being mixed with the ship fuel. According to the catalytic system, through well-designed metal-carrier interaction, reaction conditions are remarkably optimized, the selectivity of the catalyst to long-chain alcohol products is remarkably improved while high activity of the catalyst is kept, and adjustable oxygen vacancies on the surface of the CeO2 carrier in the catalyst can stabilize reaction intermediates and remove surface carbon deposition, so that the selectivity of the catalyst to the long-chain alcohol products is improved. A guarantee is provided for long-term recycling of the catalyst, and the catalyst is easy to separate, recycle and reuse in a higher alcohol preparation process.

The utility model provides a system for preparing methanol from biogas and relates to the field of biogas treatment. The system comprises a raw material treatment assembly and a methanol synthesis assembly communicated with the raw material treatment assembly, the raw material treatment assembly comprises a biogas buffer tank, a biogas compressor, a biogas desulfurization and decarbonization device, a biogas reforming device, a steam generator and a water cooler which are communicated in sequence, the biogas buffer tank is connected with an external biogas source, the water cooler is communicated with the methanol synthesis assembly, and a purge gas outlet of the methanol synthesis assembly is communicated with the biogas reforming device; the steam generator is connected with a desalted water booster pump; the desalted water booster pump is communicated with the steam generator and the methanol synthesis assembly, and steam generated by the steam generator and the methanol synthesis assembly enters the biogas reforming device to serve as raw material water for reforming. According to the utility model, sulfur and excessive carbon dioxide in the methane can be removed, the requirement of methanol synthesis can be met in the subsequent treatment process, the process flow is simplified, and the equipment investment is reduced.

The present application relates to a kind of green alcohol and green ammonia co-production system and method based on traditional coal methanol device and high temperature fuel cell electrolytic cell, belong to fuel cell technical field.The green alcohol and green ammonia co-production system includes: raw material pretreatment and vaporization module, coal gas purification module, methanol synthesis and gas-liquid separation module, SOFC power generation and CO2 enrichment module, SOEC electrolysis module, green alcohol synthesis module and green ammonia synthesis module.The green alcohol and green ammonia co-production system is through "electric-chemical-carbon" synergic cycle, simultaneously solves renewable energy consumption and high carbon chemical decarburization two big problems, realizes green alcohol and green ammonia efficient co-production.

Some variations provide a process for producing mixed alcohols, comprising: purifying a biogas feedstock to generate a renewable natural gas stream comprising methane; introducing the renewable natural gas stream into a methane-to-syngas unit operated at effective conditions to convert the methane to a first syngas stream containing at least H2, CO, and CO2; purifying the first syngas stream, including separating the CO2 from the first syngas stream, and optionally separating some of the H2 from the first syngas stream, thereby generating a clean syngas stream; introducing the clean syngas stream into a mixed-alcohol reactor operated at effective alcohol synthesis conditions with an alcohol-synthesis catalyst, thereby generating mixed alcohols; and purifying the mixed alcohols to generate a mixed-alcohol product. The mixed-alcohol product may be blended with a hydrocarbon fuel, such as gasoline, to produce a blended fuel. The blended fuel has significantly lower carbon intensity than the base hydrocarbon fuel.

The invention discloses a synthesis method of bis-chiral beta-halohydrin, and belongs to the technical field of enzyme engineering. The synthesis method of the double-chiral beta-halohydrin comprises the following steps: co-dissolving a substance containing cytochrome P450 monooxygenase and a racemization substrate in a solvent to obtain a reaction solution, carrying out catalytic reaction on the reaction solution at 20-40 DEG C for 20-30 hours, then centrifuging, collecting supernate, extracting and concentrating to obtain the double-chiral beta-halohydrin, the amino acid sequence of the cytochrome P450 monooxygenase is as shown in SEQ ID NO.1, and the structural formula of the racemic substrate is as shown in formula I, formula II or formula III. Wherein R1 is hydrogen, fluorine, chlorine, bromine, methyl or methoxyl, R2 is hydrogen or methyl, R3 is fluorine, chlorine or bromine, and R4 is fluorine, chlorine or bromine. The bichiral beta-halohydrin prepared by the biological catalysis method provided by the invention can solve the problems of low enzyme activity, tedious steps, high cost and the like in the prior art.

The invention discloses a preparation method of a catalyst for synthesizing isomeric alcohol, and the preparation method comprises the following steps: S1, dissolving cobalt salt, copper salt and a carrier with high specific surface area in a solvent through ultrasonic dispersion, mixing, dipping, stirring, and aging to obtain a precipitate; s2, stirring and refluxing the precipitate and a 2-methylimidazole solution together, aging again, washing with absolute ethyl alcohol, and drying to obtain a catalyst precursor; and S3, calcining the catalyst precursor twice in different gas atmospheres to obtain the catalyst for synthesizing the isomeric dihydric alcohol. The catalyst prepared by the method is used for carrying out molecular addition on synthesis gas (CO + H2) and formaldehyde through a formaldehyde hydroformylation route to obtain isomeric dihydric alcohol, has the advantages of high product selectivity, good catalytic activity, environmental protection, low price and the like, can improve the selectivity of isomeric dihydric alcohol synthesis reaction, and is suitable for industrial production. The ever-increasing requirements of the chemical fiber field on low-cost and high-performance polyester raw materials are favorably met.

In the system, a wind-solar power generation unit is connected with a hydrogen production and poly-generation module, and a photo-thermal heat supply unit is connected with a cascade fused salt heat storage module; the cascade fused salt heat storage module comprises a hot fused salt storage tank and a cold fused salt storage tank; the hydrogen production and poly-generation module comprises an SOEC unit, a thermoelectric ammonia / alcohol synthesis unit and a thermoelectric circulation unit, and the cascade molten salt heat storage module provides high-temperature molten salt for the thermoelectric circulation unit to drive power generation, provides high-temperature molten salt for the SOEC unit to produce hydrogen and provides high-temperature, medium-temperature and / or low-temperature molten salt for the thermoelectric ammonia / alcohol synthesis unit to supply unit energy. The hot molten salt returns to the cold molten salt storage tank after completing the set heat supply target and reaching the set temperature of the cold molten salt storage tank; the output end of the thermoelectric circulating unit is connected with the SOEC unit and the thermoelectric ammonia / alcohol synthesis unit to supply power; the input end of the power storage module is connected with the wind-solar power generation module and the thermoelectric cycle unit, and the output end is connected with the hydrogen production and poly-generation module.

The invention relates to the technical field of catalysts, in particular to a copper-silicon catalyst for synthesizing high alcohols and a preparation method thereof.The copper-silicon catalyst comprises an active component, a carrier and an auxiliary, the active component is copper element, and the copper element is derived from copper nitrate trihydrate; the carrier is a silicon-based carrier, and the silicon-based carrier is derived from liquid silicon; the auxiliary agent is a calcium element, and the calcium element is derived from calcium nitrate tetrahydrate. According to the invention, a copper-silicon-calcium system is adopted to construct the catalyst, copper nitrate trihydrate is adopted to provide an active component copper, liquid silicon is adopted to provide a silicon-based carrier, calcium nitrate tetrahydrate is adopted to provide an auxiliary calcium, and the raw material ratio is accurately controlled, so that high-loading active components are not needed on the premise of ensuring the activity, and the raw material cost for preparing the catalyst is remarkably reduced; meanwhile, the cost control difficulty in subsequent industrial application is simplified, and a cost basis is provided for large-scale popularization of a technology for preparing high-carbon alcohol from synthesis gas.

The invention discloses a method for synthesizing β-amino alcohol using 1,2-butylene oxide, and relates to the technical field of β-amino alcohol synthesis. The present invention uses amylamine and 1,2-butylene oxide as raw materials, deionized water and alcohol as mixed solvents, and prepares β-amino alcohol through a ring-opening reaction by the protective effect of CO2 on the reaction product without any catalyst. The present invention has the characteristics of high conversion rate and high yield, belongs to the category of "green chemistry", has the characteristics of mild conditions, simple operation, short reaction time, high economic benefits, and is suitable for large-scale production.

The invention relates to the technical field of alcohol synthesis, in particular to a catalyst, a preparation method and application thereof and a methanol synthesis method. The catalyst comprises a modified aluminum-based metal organic framework and active components copper oxide and zinc oxide loaded on the modified aluminum-based metal organic framework, and the modified aluminum-based metal organic framework is a product obtained by etching an aluminum-based metal organic framework. The preparation method of the catalyst comprises the following steps: (1) etching an aluminum-based metal organic framework by using a solution to obtain a product 1; (2) carrying out precipitation reaction on the product 1 and copper-zinc liquid to obtain a product 2; and (3) drying and roasting the product 2 to obtain the catalyst. When the catalyst disclosed by the invention is applied to a reaction for preparing methanol from synthesis gas, the catalyst has relatively high catalytic activity and thermal stability.

This invention relates to a phenylpyruvate decarboxylase mutant for the synthesis of phenylethanol and its applications, belonging to the fields of enzyme engineering and genetic engineering. To address the technical problems of low catalytic efficiency, poor substrate affinity, and insufficient stability of existing phenylpyruvate decarboxylases, which lead to low biosynthetic efficiency and limited yield of phenylethanol, making it difficult to meet the needs of industrial production, this invention provides a phenylpyruvate decarboxylase mutant for the synthesis of phenylethanol. This mutant offers a new and highly efficient synthetic element for the biosynthesis of phenylethanol, with broad application prospects and market potential in the field of higher alcohol synthesis.

The application discloses a carbon-coated nickel-based super-hydrophobic catalyst and a preparation method and application thereof, and belongs to the technical field of catalysts and high-alcohol synthesis. In the application, nickel salt and citric acid are dissolved in water, and then the obtained mixed solution is heated and stirred to obtain a precursor; the precursor is calcined under an inert atmosphere to obtain a carbon-coated nickel-based catalyst; and the carbon-coated nickel-based catalyst is ball-milled with polytetrafluoroethylene to obtain a carbon-coated nickel-based super-hydrophobic catalyst. In the application, the carbon-coated nickel-based catalyst is prepared first, and then coupled with the hydrophobic polymer polytetrafluoroethylene to form a new super-hydrophobic catalyst. The nickel-based catalyst and the polytetrafluoroethylene are ball-mixed, the hydrophobic performance of the nickel-based catalyst is improved, the water "poisoning" phenomenon of the catalyst is relieved, the coupling of low-alcohol to high-alcohol is further promoted, the yield of high-alcohol and the selectivity of C6+ high-alcohol are improved, and the application prospect is wide.