346 results about "Hydrodeoxygenation" patented technology

Methods and systems for converting a renewable fuel intermediate composition to finished transportation fuel are provided herein. In some examples, a renewable fuel intermediate composition is flowed over a first catalyst in a first reaction zone to generate a saturated, hydrodeoxygenated product. A liquid portion of the renewable fuel intermediate composition may be characterized as having more than about 70 wt % of the oxygen being within ketone groups. The saturated, hydrodeoxygenated product may be flowed over a second fixed-bed catalyst in a second reaction zone to generate a product including the finished transportation fuel.

The invention relates to the technical field of biodiesel hydrogenation catalysts, and particularly discloses a hydrogenation catalyst of organic bentonite loaded cerium-zirconium solid solution and nickel-molybdenum phosphide as well as a preparation method and application of the hydrogenation catalyst. The hydrogenation catalyst with the organic bentonite loaded with the cerium-zirconium solid solution and the nickel-molybdenum phosphide comprises an organic bentonite carrier, the cerium-zirconium solid solution and the nickel-molybdenum phosphide, the loading capacity of the cerium-zirconium solid solution on the organic bentonite carrier is 2-2.5 wt%; the cerium-zirconium solid solution comprises cerium dioxide and zirconium dioxide; the loading capacity of the nickel molybdenum phosphide on the organic bentonite carrier is 10-15 wt%; and the nickel molybdenum phosphide is Ni2Mo3P. The organobentonite carrier provides an acid site and promotes deoxidation path optimization, the layered structure of the organobentonite carrier can limit the cerium-zirconium solid solution and the nickel-molybdenum phosphide, and organic groups are also embedded into the layered structure, so that the organic compatibility of the organobentonite carrier to biodiesel is improved, and the catalytic efficiency is improved. The cerium-zirconium solid solution provides oxygen vacancies, promotes hydrogenation / deoxidation, and improves the thermal stability and sintering resistance of the catalyst.

The invention relates to the technical field of compound production equipment, and discloses a multiphase synergistic hydrodeoxygenation reaction device and a reaction method thereof.The multiphase synergistic hydrodeoxygenation reaction device comprises a reaction container, the inner wall of the reaction container is fixedly connected with a distribution disc, and when high-pressure gas-liquid mixed raw materials enter an inlet distributor to flow, the distribution disc is communicated with the distribution disc; in the prior art, more vortexes are possibly formed on the surface of the fixed disc, so that impurities are locally accumulated under the action of the vortexes to cause blockage, raw materials are non-uniformly distributed on the surface of the fixed disc, and the distribution effect of the distribution disc is influenced; meanwhile, the gas and the liquid are centrifugally thrown into the reaction container from the spiral fan blade I under the action of the spiral fan blade I and the spiral fan blade II in the inlet distributor, so that the situation that the liquid is blown to two sides due to upward impact after the high-pressure gas is ejected from the middle part and collides with a fixed baffle plate is avoided; and the wall flow phenomenon is easily caused to influence the uniformity of raw material distribution.

The invention relates to the technical field of biological aviation kerosene, and discloses a process for preparing biological aviation kerosene from waste grease. The method comprises the following steps: introducing waste oil into a hydrofining reactor, introducing hydrogen, carrying out a hydrodeoxygenation reaction under the catalysis of a hydrogenation catalyst, carrying out a reaction on the obtained hydrodeoxygenated oil in an isomerization pour point depressing reactor, and finally carrying out isomerization hot high-pressure separation treatment, isomerization cold high-pressure separation treatment and rectification tower segmentation to obtain the biological aviation kerosene. The specific surface area of a carbon matrix of the hydrogenation catalyst is large, the void structure is rich, a large number of Ni-Mo-P active catalytic centers can be exposed, precious metals such as platinum and ruthenium do not need to be added, the hydrodeoxygenation reaction efficiency of waste oil and fat is remarkably improved, the mass fraction of branched paraffin and cycloparaffin in biological aviation fuel is high, and the combustion performance is better.

The invention relates to a preparation method of a niobium pentoxide loaded molybdenum disulfide catalyst and application of the niobium pentoxide loaded molybdenum disulfide catalyst in lignin conversion. The preparation method comprises the following steps: dissolving ammonium molybdate heptahydrate and thiourea in distilled water, adding Nb2O5, and adjusting the pH value of the mixture to 0.8-1.1 by using hydrochloric acid; transferring the solution into a stainless steel autoclave for hydrothermal reaction; centrifugally separating to obtain a black precipitate, washing with water and absolute ethyl alcohol, and drying in vacuum overnight; and placing the obtained substance in a high-temperature and high-pressure reaction kettle, screwing the reaction kettle to seal the reaction kettle, discharging gas after introducing H2, discharging air in the device, pressurizing to 3-5 MPa, and reacting to obtain the catalyst Nb2O5-MoS2. The catalyst shows excellent activity of aromatic phenol and ether compound hydrodeoxygenation for aromatic hydrocarbon preparation. The invention provides the catalyst which is low in cost, simple and convenient to prepare and excellent in performance, after ten cycle experiments, the activity of the catalyst is still stable, and the indexes of the conversion rate and the yield are reduced by less than 5%.

The invention discloses a novel catalyst NiW / Ti-USY for hydrodeoxygenation. The novel catalyst comprises a modified molecular sieve carrier, active metal and auxiliary metal, wherein the active metal and the auxiliary metal are loaded on the modified molecular sieve carrier; the active metal is Ni metal; the auxiliary agent metal is W metal; the modified molecular sieve carrier is a Ti-USY carrier obtained by carrying out TiO2 composite modification on a carrier USY; wherein the loading capacity of the NiW metal on the Ti-USY carrier is 10 to 35 weight percent, and the loading capacity of the Ti metal in the Ti-USY carrier is 6 to 12 weight percent. The catalyst has the advantages of high catalytic activity, high selectivity of biological aviation kerosene components (C8-C16), high yield and good stability.

The invention discloses a graphite felt / high-entropy MOF electrode, a lignin-based fuel cell and a method for co-producing aviation fuel components. The graphite felt / high-entropy MOF electrode is obtained by dissolving various soluble metal salts and 2, 5-dihydroxy terephthalic acid in a solvent for hydrothermal reaction and generating high-entropy MOF on the surface of the graphite felt in situ. When the graphite felt / high-entropy MOF electrode is used for assembling the lignin-based liquid flow fuel cell, high-power density output of the lignin-based liquid flow fuel cell and efficient conversion from biomass energy to electric energy are successfully realized. After long-time power generation of the flow battery, lignin macromolecules can be promoted to be efficiently and directionally depolymerized into an aircraft fuel precursor to generate C8-C16 micromolecular substances, the main micromolecular substances are C10-C11, the micromolecular substances can be further subjected to hydrodeoxygenation to prepare aircraft fuel, and the flow battery has very great commercial prospects and utilization values.

The invention provides Ni-Fe / ZrO2 bimetallic nanoparticles as well as a preparation method and application thereof, and belongs to the technical field of catalysts. The preparation method comprises the following steps: firstly, preparing ZrO2 loaded with NiO, FeO and Fe2O3 by adopting an impregnation method, and then carrying out reduction treatment by adopting a reducing atmosphere to prepare the Ni-Fe / ZrO2 bimetallic nanoparticles. In the prepared bimetallic nanoparticles, nickel and iron are combined and loaded on zirconium dioxide, so that the Ni and Fe nanoparticles are anchored through interaction of strong metal and a carrier, the catalytic performance is remarkably improved, a multifunctional catalyst is achieved, subcritical water oxidation of Fe, in-situ production of hydrogen and promotion of the hydrodeoxygenation process of cellulose by Ni can be achieved, and the hydrodeoxygenation efficiency of cellulose is improved. Meanwhile, the surface of the ZrO2 carrier has acidic and alkaline sites, so that the ZrO2 carrier can interact with active components with different properties to promote continuous forward proceeding of the reaction, and efficient conversion of cellulose to 2, 5-hexanedione under mild reaction conditions is realized.

The present technology relates to biofuels, and more particularly, to biomass-based diesel from olefin oligomers. Diesel fuels with cetane number of 49 or greater are prepared by blending hydrocarbons produced by olefin oligomerization with renewable diesel, resulting in a blended fuel that has a lower cloud point than the cloud point of the renewable diesel. A different aspect relates to an integrated process for lipid HDO and olefin oligomerization wherein the propane coproduct of lipid HDO is subjected to dehydrogenation to produce a vapor stream having propylene and hydrogen. The propylene is subsequently oligomerized to iso-olefins and the iso-olefins are combined with the lipid feed for hydrogenation in the HDO reactor.

The invention provides a preparation method, a product and application of an acid site / carrier decoupled metal-acid multifunctional catalyst, and belongs to the technical field of biomass energy utilization. According to the preparation method, a metal active site is provided by non-noble metal Ni, a neutral material h-BN is taken as a carrier, and a Ni element is reduced and loaded on h-BN under an alkaline condition by adopting a liquid phase reduction method, so that the Ni / h-BN catalyst is prepared; and then heteropoly acid is used for providing an acid site, the acid site is loaded on a Ni / h-BN catalyst through an impregnation method, and Ni-HSiW / h-BN is prepared. According to the present invention, by flexibly regulating and controlling the acid site (loaded or unloaded heteropolyacid), the required product can be selectively obtained when the obtained catalyst is used for catalyzing the lignin derivative hydrodeoxygenation reaction, and by regulating and controlling the temperature, the time and other parameters of the hydrodeoxygenation reaction, the high selectivity on the reaction product can be provided.

The present invention relates to a method for catalytic cracking production of biomass liquid fuel, and the method is as follows: Take MCM-48 mesoporous molecular sieve and calcine it in a solution impregnated with cobalt salt and metal borate to obtain a molecular sieve catalyst. Take lignin raw material and sugar raw material, dry them, and then carry out temperature-raising microwave cracking in a cracking reaction fluidized bed. The oil and gas are further catalytically cracked by the molecular sieve catalyst, and the oil liquid is recovered by condensation. The oil liquid, hydrogen-supplying mixed solvent and Ru / C catalyst are subjected to hydrodeoxygenation, and centrifuged for supercritical extraction and upgrading. The material at the top of the extraction tower enters a first-stage separation tower and a second-stage separation tower under reduced pressure for continuous reduced-pressure separation to obtain the finished product of biomass liquid fuel. The modified MCM-48 molecular sieve catalyst catalytically cracks biomass lignin raw material and sugar raw material by a two-step method, strengthens the deoxygenation reaction, and then undergoes supercritical extraction and upgrading and reduced-pressure separation, reducing the reaction temperature and acid value of the biomass liquid fuel, and improving the liquid-gas conversion rate, high-carbon-number oil liquid yield and product calorific value.

Methods and systems for converting a renewable fuel intermediate composition to finished transportation fuel are provided herein. In some examples, a renewable fuel intermediate composition is flowed over a first catalyst in a first reaction zone to generate a saturated, hydrodeoxygenated product. A liquid portion of the renewable fuel intermediate composition may be characterized as having more than about 70 wt % of the oxygen being within ketone groups. The saturated, hydrodeoxygenated product may be flowed over a second fixed-bed catalyst in a second reaction zone to generate a product including the finished transportation fuel.

Systems and methods are provided for production of renewable jet fuel and / or jet fuel blending component fractions. The systems and methods provide for formation of jet boiling range fractions via hydrodeoxygenation and catalytic dewaxing of bio-derived feeds. The systems and methods for reducing or minimizing recycle and / or forming only a jet boiling range product and a lower boiling range product can be facilitated based on selection of a suitable feedstock and / or based on selection of suitable reaction conditions and catalyst for the catalytic dewaxing.

The invention belongs to the technical field of biodiesel and bio-based lubricating oil. The method comprises the following steps: reacting grease, aromatic hydrocarbon and a zeolite molecular sieve catalyst at a certain temperature for a period of time, then distilling and separating to obtain aryl grease, and finally co-producing biodiesel and hydrocarbon lubricating oil components by adopting a hydrodeoxygenation method. The preparation method provided by the invention avoids the use of fossil energy, solves the problem of complex synthesis steps of bio-based lubricating oil, and has important significance on high-value utilization of biomass resources.

The invention belongs to the field of biofuel preparation through grease hydrogenation, and provides a catalyst for biofuel preparation through waste grease one-step hydrogenation and a preparation method of the catalyst. The catalyst is a non-supported NixMoyWz-kHY catalyst, and the preparation method of the catalyst comprises the following steps: uniformly mixing a nickel source, a molybdenum source and a tungsten source according to a certain proportion, adding deionized water and a reaction aid ethylene glycol, dissolving, heating, stirring, adding an ammonia water-ethanolamine mixed solution, complexing, steaming until the pH value of the solution is 7-8, and filtering to obtain the catalyst. And adding a certain amount of HY molecular sieve powder, methyl cellulose (MC) and citric acid into the solution, filtering the reaction solution, drying the filter cake at 120 DEG C, performing extrusion molding, and roasting to obtain the catalyst. The catalyst provided by the invention effectively solves the problems of high oxygen content, difficulty in deep isomerization and the like in the waste oil and fat, has the functions of hydrodeoxygenation, cracking and isomerization at the same time, and realizes one-step conversion of the waste oil and fat into biological aviation kerosene and biodiesel. Besides, the non-supported catalyst adopted by the invention has high-activity center density, the problems of aging and shedding of the carrier are not needed to be worried about, and the preparation method of the catalyst is simple, environment-friendly and pollution-free, and meets the requirements of industrial preparation.

The application discloses a method for preparing a hydrogenation deoxidation intermediate by using conjugated fatty acids and application thereof, and belongs to the technical field of oil production biofuel. The method comprises the following steps: (1) subjecting conjugated fatty acids and a dienophilic monomer to a Diels-Alder addition reaction to obtain an addition product; and (2) removing unreacted raw materials from the addition product, so that the hydrogenation deoxidation intermediate is obtained. The method breaks the traditional idea of deoxidation first and isomerization later, and instead adopts the idea of "structure modification first and hydrogenation deoxidation later" to prepare the hydrogenation deoxidation intermediate, so that the hydrogenation isomerization process can be omitted, the generation of cracking products is reduced, the content of isomerization products in the biodiesel is significantly improved, and higher-quality biofuel is obtained.

The invention discloses a bio-based aviation fuel hydrodeoxygenation isomerization catalyst and a preparation method and application thereof, and belongs to the technical field of preparation of sustainable biological aviation fuel hydrogenation catalysts. The method comprises the following steps: uniformly mixing sodium silicate, ammonium salt and desalted water in a stirring kettle to obtain a colloidal substance A; mixing titanium tetraethoxy, acetic acid, ethanol and desalted water to obtain a colloidal substance B; the preparation method comprises the following steps: dropwise adding phosphoric acid into desalted water, adding pseudo-boehmite and silica sol, mixing and stirring, adding a template agent, crystallizing, cooling, filtering, washing and drying to obtain SAPO-31 raw powder; the preparation method comprises the following steps: stirring and mixing a colloidal substance A, a colloidal substance B and SAPO-31 raw powder, and then filtering, drying, roasting and crushing to obtain a composite carrier; adding the composite carrier into a nickel salt aqueous solution for dipping, and then drying and roasting to obtain the hydrodeoxygenation isomerization catalyst. The catalyst is applied to kettle type slurry bed hydrodeoxygenation and hydroisomerization reactions, and can effectively avoid occurrence of abnormal working conditions such as coking and temperature runaway of the catalyst.

The invention belongs to the technical field of catalysts, and particularly discloses a hydrodeoxygenation catalyst and a preparation method and application thereof. The catalyst contains a silicon-zirconium composite oxide carrier and a CuCo alloy loaded on the carrier, the molar ratio of silicon to zirconium in the silicon-zirconium composite oxide is (1-5): 1. The preparation method comprises the following steps: 1) preparing a precursor containing copper, cobalt, silicon and zirconium by adopting a sol-gel method; 2) roasting the precursor to obtain a copper oxide and a cobalt oxide which take the silicon-zirconium composite oxide as a carrier; and 3) carrying out reduction treatment on the material obtained in the step 2) to obtain the catalyst. The catalyst provided by the invention has high activity and alkane selectivity in hydrodeoxygenation reactions of various aldehyde ketone condensates, and can be used for hydrodeoxygenation reactions of aldehyde ketone condensation mixtures to produce aviation fuels.

Disclosed herein is a metal oxide aerogel catalyst for hydrogenation and / or hydrodeoxygenation, a method for preparing the same, and a method for hydrogenation and / or hydrodeoxygenation using the same. The catalyst consists of a metal and an oxide thereof, and the catalyst is in a form of an aerogel produced by supercritical drying. The catalyst has an effect of providing high hydrogenation and / or hydrodeoxygenation efficiency of an oxygen-containing compound.

The present invention belongs to the technical field of aviation fuel preparation, and specifically relates to a method for synthesizing thermally stable aviation kerosene from 2,5 - hexanedione. The method comprises the following steps: 1) Using 2,5 - hexanedione as a raw material and an alkali solution as a catalyst, an unsaturated ketone compound with twelve carbon atoms is obtained through an alkali - catalyzed aldol condensation reaction; 2) The unsaturated ketone compound obtained in step 1) undergoes a hydrodeoxygenation reaction under the action of a ternary mixed metal oxide catalyst to obtain a saturated cycloalkane liquid fuel with twelve carbon atoms containing alkyl decalin. The method of the present invention simplifies the current route for preparing alkyl decalin from biomass, and the intermediate products and the final product do not need to undergo a purification / distillation process; significantly reduces the production cost, the raw materials are cheap and easily available, the reaction conditions are mild, and it is suitable for large - scale industrial production.

The present invention discloses a halogen-modified nickel-aluminum hydrotalcite, a preparation method thereof, and an application thereof in the catalytic hydrogenation of lignin. A water-soluble nickel salt, a water-soluble aluminum salt, an alkali precipitating agent and water are mixed and then subjected to a hydrothermal reaction. The hydrothermal reaction product is first calcined in an air atmosphere and then calcined in a reducing atmosphere to obtain a nickel-aluminum hydrotalcite. The nickel-aluminum hydrotalcite is mixed with a halogenated aromatic hydrocarbon and an organic solvent and then subjected to a solvothermal reaction to obtain the halogen-modified nickel-aluminum hydrotalcite. The halogen-modified nickel-aluminum hydrotalcite is applied to the catalytic hydrodeoxygenation reaction of lignin compounds and / or aryl ether compounds to synthesize phenolic compounds, showing high catalytic selectivity and high yield. Moreover, the halogen-modified nickel-aluminum hydrotalcite can be recovered and separated by magnetic separation and can be reused multiple times, greatly reducing its use cost.

The invention relates to the technical field of catalytic chemistry and waste plastic recycling, and discloses a metal / MoOx / molecular sieve bifunctional catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out ion exchange on a molecular sieve and an ammonium nitrate solution; completely dissolved molybdenum salt is added, and ultrasonic dispersion, suction filtration, washing and drying are performed; completely dissolved urea and metal salt are added, hydro-thermal synthesis is carried out, and drying is carried out; and carrying out suction filtration, washing and drying to obtain a metal / MoOx / molecular sieve precursor, and calcining and reducing to obtain the metal / MoOx / molecular sieve bifunctional catalyst. The bifunctional catalyst disclosed by the invention is simple in preparation process, relatively high in catalytic activity, excellent in selectivity, good in stability, convenient in reaction operation, mild in condition and suitable for industrial popularization and application; moOx contributes to hydrodeoxygenation, and metal sites contribute to catalytic hydrogenation; the efficient cyclic utilization of resources is realized, and the problem of environmental pollution is also effectively relieved.

Provided is a system for utilizing bio-oil, which can easily and effectively utilize bio-oil regardless of the properties and supply / demand balance of bio-oil while utilizing existing refinery equipment. The system is provided with an atmospheric distillation device, a bio-oil supply means, and at least one device selected from the group consisting of a gas recovery device, a hydrofining device, a naphtha fractionation device, a fluid catalytic cracking device, and a reduced pressure distillation device. The bio-oil supply means supplies the bio-oil, which is derived from biomass and has been subjected to a hydrodeoxygenation treatment, to the atmospheric distillation device together with a raw material oil including crude oil.

The present invention relates to a method for producing renewable aviation fuel D or components thereto from a feed-stock A of biological origin, in particular to methods comprising separate hydrodeoxygenation 20 and hydroisomerization 40 steps wherein the hydroisomerization is performed in the presence of a catalyst comprising a noble metal, a 12-membered ring zeolite with a pore size below 0.7 nm.

Disclosed in the present invention are a cascade reaction device and method for preparing aviation fuel by means of photoelectrocatalytic conversion of lignin. The method comprises: placing lignin in a pretreatment reaction chamber filled with an alkaline solution, so that the lignin is fully dissolved; opening valves to enable a pretreated reaction liquid to flow into an anode chamber in a photoelectrocatalytic reaction chamber; using solar energy to drive a photoelectrocatalytic reaction at an anode; after sufficient reaction, enabling the reaction liquid in the anode chamber to flow into a temporary storage chamber, and subsequently, using a pump to transfer the reaction liquid in the temporary storage chamber into a cathode chamber; and after sufficient reaction, introducing the reaction liquid in the cathode chamber into a high-pressure reaction chamber by means of a pump, and enabling hydrogen generated in the cathode chamber to flow into a gas cylinder by means of a pipe for collection, so as to be supplied to the high-pressure reaction chamber, wherein the reaction liquid undergoes a hydrodeoxygenation reaction under the action of a catalyst in the high-pressure reaction chamber, and after sufficient reaction, the aviation fuel can be obtained. The present invention achieves an integrated cascade reaction for solar-driven conversion of lignin into aviation fuel.

The invention relates to a method for synthesizing aviation fuel, in particular to a method for synthesizing aviation fuel based on biomass pyrolytic oil by using a specific catalyst combination and a multi-step catalytic reaction, and belongs to the field of green chemistry and energy engineering. The method comprises the following steps: S1, biomass liquefaction; S2, hydrodeoxygenation; and S3, hydroisomerization. According to the method, the biomass pyrolytic oil is converted into the aviation fuel by using a specific catalyst combination and a multi-step catalytic reaction, so that the preparation cost of the catalyst is reduced, the catalytic efficiency of the catalyst in the reaction process is improved, the performance of the biomass pyrolytic oil in the hydrogenation and isomerization reaction processes is optimized, and the yield of the aviation fuel is improved. The reaction rate of the catalyst in the hydrogenation process is improved, the carbon deposition phenomenon on the surface of the catalyst is reduced, and the service life, stability, anti-coking performance and other properties of the catalyst are improved.

The invention discloses a method for preparing SAF through continuous hydrogenation of a bio-based aviation oil precursor and a hydrogenation reactor, and belongs to the technical field of preparation of sustainable aviation oil. The hydrogenation reactor comprises a dispersion kettle, a first-stage hydrogenation reaction kettle, a second-stage hydrogenation reaction kettle, a filter, a reaction product cooler, a split-phase tank and a rectifying tower which are sequentially connected in series; the method comprises the following steps: mixing an aviation oil precursor, a supplementary catalyst and a hydrocarbon solvent in a dispersion kettle to obtain a reaction solution, then conveying the reaction solution to a primary hydrogenation reaction kettle for hydrogenation saturation and hydrodeoxygenation reaction, conveying part of unreacted reaction solution to a secondary hydrogenation reaction kettle for hydrogenation saturation and hydrodeoxygenation reaction, and then outputting a reaction product, sequentially passing through a filter and a reaction product cooler to enter a split-phase tank, and separating to obtain an SAF crude product; and inputting the SAF crude product into a rectifying tower, and separating to obtain an SAF product. The production process is continuous, the product quality is stable, and the method is suitable for large-scale production of sustainable aviation oil by hydrogenation of a condensation body prepared from a bio-based platform compound.

The invention discloses a phosphating carbon film packaging structure P-Ni-C catalyst, a preparation method and application, and relates to the technical field of catalysts, the preparation method of the catalyst comprises the following steps: S1, nickel salt and terephthalic acid are subjected to a hydrothermal reaction in N, N-dimethylformamide, and a product obtained after the reaction is subjected to suction filtration, washing and drying to obtain an intermediate product; and S2, respectively placing NaH2PO2.H2O and the intermediate product in the upstream and downstream of a porcelain boat, and carrying out one-step carbonization and phosphorization to obtain the P-Ni-C catalyst. An organic ligand on the outer surface of the catalyst can form a carbon film, the catalyst based on the Ni-MOF packaging structure can prevent metal particles from clustering and gathering, the unique pore structure of the original structure can be reserved, meanwhile, the catalytic effect of the catalyst is further improved through phosphorization, and the catalytic effect of the catalyst is improved. The hydrodeoxygenation experiment in the aspect of biomass hydrothermal liquefaction is facilitated; meanwhile, the P-Ni-C catalyst has a porous structure, so that the P-Ni-C catalyst also has extremely high catalytic stability in a hydrothermal liquefaction experiment.

The present invention describes a method for treating a feedstock obtained from a renewable source in two steps using, in a hydrotreating step, a specific hydrodeoxygenation catalyst comprising at least one metal from group VIII, in combination with at least one metal from group VIB of the periodic table, the molar ratio between the group VIII elements and the group VIB elements being between 0.02 and 0.2, at least one organic additive and an oxide support comprising at least alumina, followed by a step of gas / liquid separation of the effluent obtained from the hydrotreating and then a hydroconversion step, in order to produce at least one gas oil fraction.

The application discloses HZSM-5 molecular sieve, a preparation method and application thereof, and belongs to the field of molecular sieve catalysts. The HZSM-5 molecular sieve comprises a flaky HZSM-5 molecular sieve base body and platinum nano-particles loaded on the flaky HZSM-5 molecular sieve base body; and the average thickness of the flaky HZSM-5 molecular sieve base body is 50-100 nm. The flaky HZSM-5 molecular sieve base body can provide acid centers, the platinum nano-particles can provide hydrogenation centers, and the two can cooperate to achieve good catalytic activity; and the flaky HZSM-5 molecular sieve base body has a relatively thin thickness, i.e. a relatively short b-axis channel length, which is not only beneficial to material diffusion and transmission, but also can greatly reduce the case that intermediate products contact acid sites to cause side reactions, and therefore can provide higher product selectivity. In particular, the HZSM-5 molecular sieve has a good application prospect in catalyzing bio-oil hydrodeoxygenation.