257 results about "Hydrodeoxygenation" patented technology

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 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.

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 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 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.

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 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.

The invention provides a metal-heteropolyacid catalyst confined to a molecular sieve as well as a preparation method and hydrodeoxygenation application of the metal-heteropolyacid catalyst. The catalyst takes a spherical pure silicon molecular sieve with the particle size of 2-3mm as a carrier, and transition metal and heteropoly acid active components are supported in a pore channel in a limited range; the mass ratio of the heteropoly acid to the metal is (10-50): 1. According to the invention, an organic amine bridging strategy is adopted to construct near double active sites, that is, organic amine molecules in heteropolyacid organic amine salt are used as a guiding anchoring agent, and a transition metal precursor is accurately anchored near heteropolyacid. After roasting, a concerted catalysis center in which a metal hydrogenation site and a heteropolyacid deoxidation site are closely close on the nanoscale is successfully constructed in a confinement space of the molecular sieve, and the mass transfer efficiency and the step coupling effect in a hydrodeoxygenation multi-step cascade reaction are improved. When the weight hourly space velocity is 2 g / gcat. / h, the temperature is 150-250 DEG C and the pressure is 0.5-2 MPa, the conversion rate of the oxygen-enriched phenolic compound can be greater than or equal to 94%, and the yield of cycloalkane can be greater than or equal to 90%.

The present invention discloses a method for synthesizing polycyclic alkanes from phenols derived from lignin via a one-pot two-step process. 1) In the first step of the reaction, the phenolic compound derived from lignin is first converted into a ketone compound under the action of a hydrogenation catalyst, and then the ketone compound rapidly undergoes aldol condensation under the action of a solid acid to generate a jet fuel precursor; 2) In the second step of the reaction, the product of the first step is not separated, but the reaction conditions are directly strengthened. The jet fuel precursor is directly subjected to complete hydrodeoxygenation to generate polycyclic alkanes under the action of the hydrogenation catalyst and the solid acid in the first step; the phenolic compound derived from lignin is synthesized into polycyclic jet fuel by changing the reaction conditions in a single reaction vessel. Compared with traditional chain-like jet fuel, it has a higher density and a higher calorific value and can be used as a substitute for traditional aviation fuel. The catalyst and raw materials used in the present invention are abundant in source, low in price, and easy to separate; the entire production process is simple to operate.

The invention is applicable to the technical field of biomass energy catalysis and conversion, and provides a high-activity and high-stability nickel-cobalt alloy catalyst and a synthesis method and application thereof, and the synthesis method comprises the following steps: preparing S-1 zeolite; the preparation method comprises the following steps: mixing S-1 zeolite with an aqueous solution of Ni (NO3) 2.6 H2O and an aqueous solution of Co (NO3) 2.6 H2O for dipping, placing the mixture in a tetrapropylammonium hydroxide solution for hydro-thermal treatment, and performing static calcination to obtain a NixCoyO at S-1 nanocrystal; mixing the NixCoyO (at) S-1 nanocrystal with polymers P123, F127, dopamine hydrochloride and 1, 3, 5-trimethylbenzene, performing ultrasonic dispersion in a mixed solvent of water and ethanol, adding ammonia water for reaction, and collecting NixCoyO (at) S-1 (at) mPDA; and carrying out carbonization and reduction on the NixCoyO (at) S-1 (at) mPDA to obtain the NixCoy (at) S-1 (at) mC catalyst. The prepared catalyst has excellent hydrodeoxygenation performance, vanillin can be efficiently converted into 2-methoxy-4-methylphenol (MMP) under mild conditions, and the yield exceeds 94%.

The invention discloses a preparation method of a catalyst for producing biological aviation kerosene by using high alcohol as a raw material and adopting a slurry reactor. The preparation method comprises the following steps: (1) respectively dissolving a nickel source and an organic amine source in methanol; slowly dripping the methanol solution of the organic amine source into the methanol solution of the nickel source under stirring; after dropwise adding, heating and carrying out reflux reaction for 30-90 minutes; filtering while hot, washing with methanol, collecting solid, and drying in vacuum to obtain the organic nickel catalyst. (2) respectively acidifying aqueous solutions of an organic amine source and a molybdenum source with diluted hydrochloric acid until the pH is 2-4; slowly dripping the acidified organic amine source into the acidified molybdenum source under stirring; after dropwise adding, stirring and reacting for 30-90 minutes; filtering, washing, collecting solids, and drying in vacuum to obtain the organic molybdenum catalyst. And (3) compounding the organic nickel catalyst and the organic molybdenum catalyst according to the mass ratio of 1: (1-10) to obtain the catalyst. The catalyst is simple in preparation process and low in energy consumption, and has high catalytic activity and high hydrodeoxygenation selectivity when being used for producing biological aviation kerosene by using high-carbon alcohol as a raw material and adopting a slurry reactor.

The invention provides a grease hydrodeoxygenation catalyst and a preparation method and application thereof, the preparation method comprises the following steps: mixing an aluminum-containing inorganic porous material, an acidic solution, an extrusion aid, a magnesium salt and a nickel salt, then carrying out extrusion molding to obtain a carrier precursor, and drying and roasting the carrier precursor to obtain a hydrodeoxygenation composite carrier; by taking the total weight of the carrier as 100%, the content of the magnesium element is 0.5-10%, and the content of the nickel element is 0.3-2%; dipping the hydrodeoxygenation composite carrier with a dipping solution containing active metal, and then drying and roasting to obtain the grease hydrodeoxygenation catalyst. When the hydrodeoxygenation composite carrier is prepared, magnesium salt and nickel salt are combined, and the hydrodeoxygenation composite carrier with a nickel-doped magnesium aluminate spinel structure can be obtained. The hydrodeoxygenation composite carrier has good hydrothermal stability and mechanical strength. The grease hydrodeoxygenation catalyst prepared by loading an active metal component on the hydrodeoxygenation composite carrier is stable in deoxygenation activity and excellent in deoxygenation effect.

A method of producing hydrocarbons includes acidifying and extracting fatty acids from a feed solution that includes fatty acid salts using carbon dioxide (CO2); separating CO2 from the extracted fatty acids; recycling at least a portion of the separated CO2 to be used as the extractant; contacting at least a portion of the extracted fatty acids with a ketonization catalyst to produce ketones; contacting at least a portion of the ketones with a hydrodeoxygenation catalyst in the presence of hydrogen to produce n-paraffins. The n-paraffins may be subjected to hydrocarbon refining to produce hydrocarbons suitable for use as a sustainable aviation fuel, a sustainable diesel fuel, or a sustainable marine fuel.

The invention discloses a method for preparing high-energy-density fuel from ketone and phenol. The method comprises the following specific steps: step 1, under a solvent-free condition, ketone (cyclohexanone or 3, 3, 5-trimethyl cyclohexanone) and phenol are subjected to an alkylation reaction under the catalytic action of an acidic catalyst and a cocatalyst 3-mercaptopropionic acid to generate a bisphenol product; and 2, carrying out hydrodeoxygenation (HDO) reaction on the bisphenol product serving as a high-energy-density fuel precursor under the co-catalysis of Metal / C or nonmetal RaneyNi and a solid acid catalyst to obtain the high-energy-density fuel. According to the method, green renewable raw materials are taken as starting points, high-selectivity synthesis of the target product is realized through a few-step and easy-to-operate reaction path, and the method has both environmental protection property and high efficiency; the density of the prepared high-energy-density fuel is greater than 0.90 / cm < 3 >, the calorific value is greater than 40J / L, and the performance is comparable with that of a petroleum-based high-energy-density fuel.

The invention belongs to the field of catalysis, and provides an Nb-based composite oxide supported metal catalyst, a preparation method and an application of the Nb-based composite oxide supported metal catalyst in preparation of aviation oil through hydrodeoxygenation. The catalyst comprises a dual carrier of gamma-Al2O3 and Nb2O5 (or NbOPO4), and one or more hydrogenation active metals. The hydrodeoxygenation catalyst provided by the invention has good acidity and hydrogenation performance under the interaction of the two carriers, and the acidity and hydrogenation performance are proved to be superior to those of an original single-carrier catalyst through characterization; the performance of the catalyst in hydrodeoxygenation of a biomass derivative aldol condensation product (a long-chain oxygen-containing compound) to prepare aviation oil is far superior to that of a single-carrier catalyst with the same metal loading capacity.

Method to produce an upgraded oil using a lignin-rich feedstock, said method comprises the following steps: - providing a lignin-rich feedstock, wherein said lignin-rich feedstock comprises more than 60 wt% of lignin-based compounds obtained from delignification of biomass, where said lignin-based compounds are selected from the group consisting of: lignin-derived monomers, lignin-derived dimers, lignin-derived oligomers and combinations thereof; - providing an acidic composition having a pH of less than 1, said acidic composition comprising:  an acid selected from the group consisting of: sulfuric acid; an alkylsulfonic acid; and an arylsulfonic acid; and  an alcohol selected from the group consisting of C1-C8 linear alcohol and C3-C8 branched alcohol and mixtures thereof; - combining said lignin-rich feedstock with said acidic composition into a reaction mixture; - heating up said mixture to a temperature ranging from 25oC to 120oC; and - allowing sufficient time of reaction to convert at least a portion of said lignin-derived material into said at least one esterified lignin derivative; - separating said at least one esterified lignin derivative from said acidic composition; - performing a hydrodeoxygenation reaction on said at least one esterified lignin derivative, wherein the hydrodeoxygenation reaction is carried out in the presence of a hydrogen-rich source at a temperature ranging from 250oC to 400oC under a H2 pressure ranging from 15 to 50 bar, more preferably 35 bar, in the presence of a catalyst adapted for HDO reactions, for a period of time sufficient to result in an upgraded oil having a TAN of about 2.5 mg KOH / g and viscosity of 3.4 cP.

A method for hydrotreating a biorenewable feedstock is disclosed. The process includes hydrotreating the bioregenerable feed stream in a hydrotreating reactor to hydrodeoxygenate the bioregenerable feed stream to provide a hydrotreated stream. A hydrocracking feed stream taken from the hydrotreated stream is hydrocracked in a hydrocracking reactor to provide a hydrocracked stream. A hydroisomerization feed stream taken from the hydrotreated stream is hydroisomerized in a hydroisomerization reactor to provide a hydroisomerized stream. The hydroisomerized stream is separated to provide a jet fuel stream and a diesel stream. The diesel stream is separated into a first recycled diesel stream and a second recycled diesel stream. The first recycle diesel stream is passed to a hydrocracking reactor and the second recycle diesel stream is passed to a hydroisomerization reactor.

Provided are a precursor compound of a tetracyclic hydrocarbon and a preparation method thereof, and a tetracyclic hydrocarbon and a preparation method and use thereof. The precursor compound of the tetracyclic hydrocarbon with a structure shown in formula I has a polycyclic structure. The precursor compound is subjected to hydrodeoxygenation so as to be prepared into the tetracyclic hydrocarbon with a structure shown in formula II that has a high density (0.986 g / cm3), a high calorific value (41.14 MJ / L), and a low freezing point (less than −60° C.).

The invention discloses a biological aviation kerosene and diesel oil hydrogenation coupling system and a hydrogenation process. The hydrogenation coupling system comprises a biological aviation kerosene hydrogenation system and a diesel oil hydrogenation system; and a gas phase outlet of a thermal high-pressure separator of the diesel hydrogenation system is respectively connected with a material inlet pipeline of a hydrogen mixer I, a material inlet pipeline of a hydrogen mixer II and an outlet pipeline of a heat exchanger II of the biological aviation kerosene hydrogenation system. The hydrogenation process comprises the following steps: (1) mixing a biological aviation kerosene raw material with hot high-pressure separated gas, and reacting in the hydrodeoxygenation reaction unit; (2) mixing effluent of the hydrodeoxygenation reaction unit with hot high-pressure separated gas, and enabling the mixture to enter an isomerization reaction unit to be subjected to an isomerization reaction; and (3) mixing the effluent of the isomerization reaction unit with the hot high-pressure gas, cooling, and carrying out steam stripping fractionation to obtain the biological aviation kerosene product. The invention solves the problem of sulfur loss of the hydrodeoxygenation catalyst, reduces the destructive effect of water vapor on the catalyst, prolongs the operation cycle of the device, simplifies the process flow, and reduces the investment of the device.

The invention belongs to the technical field of waste textile reutilization and fuel preparation. The invention provides a method for fuelizing waste textiles, which is characterized in that the waste textiles are converted into hydrocarbon fuel under certain conditions by adopting a supported non-noble metal-metal oxide catalyst and a hydrodeoxygenation and denitrification method. The method provided by the invention can realize energy utilization of the waste textiles under low-cost and mild conditions, can solve the problem of low recycling rate of the waste textiles, and has important significance on high-valued utilization of the waste textiles.