46 results about "Cetane number" patented technology

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 present invention belongs to the technical field of molecular dynamics models, and specifically relates to a method for constructing a molecular-level catalytic cracking process reaction kinetics model that incorporates oil property calculation capabilities. Verified by industrial data, the model provided by the present invention shows a high degree of agreement between the calculated values ​​for catalytic cracking product yield, product group composition content, product typical molecular content, and gasoline and diesel distillation ranges and industrial values. The relative errors of gasoline density and octane number, as well as diesel density and cetane number, compared with industrial data are all less than 2.2%, demonstrating that the molecular-level catalytic cracking process reaction kinetics model that incorporates oil property calculation capabilities has high reliability and can predict product composition and properties at the molecular level.

This invention relates to an alcohol-based fuel additive, its preparation method, and its application, belonging to the technical field of diesel fuel additives. The additive, by weight, comprises: a mixture of C3-C10 fatty alcohols, fatty acid methyl esters, methyl tert-butyl ether, isoamyl nitrate, dimethyl carbonate, and diesel fuel. The mass ratio of methyl tert-butyl ether to dimethyl carbonate is [value missing]. This invention employs a stepped feeding process, solving the problem of combustion improver failure caused by high shear heat generation by cooling the fuel before adding isoamyl nitrate, and ensuring long-term fuel stability at -10°C using a specific polarity gradient ratio. The fuel prepared by this invention has a high cetane number, strong power, and good anti-stratification effect, making it suitable for compression ignition engines.

The invention discloses a formula and a preparation method of a polymer composite fuel synthesized from water, alcohols, diesel oil, an additive, a cetane number increasing agent and the like. The polymer composite fuel is characterized by comprising the following components in percentage by weight: 5.0 to 50.0 percent of water, 1.0 to 50.0 percent of alcohols, 20.0 to 90.0 percent of diesel oil, 3.0 to 40.0 percent of additive and 0.1 to 10.0 percent of cetane number increasing agent. The method is operated at normal temperature and normal pressure, the technological process is simple, raw materials are rich and easy to obtain, and the production cost is low. The fuel is free of layering in use, good in stability, good in storage and combustion effect, capable of reducing environmental pollution to the maximum extent and capable of being widely applied to internal combustion engines, industrial kilns and boilers as fuel, and other components such as existing equipment do not need to be transformed or updated.

The current invention describes a high-throughput catalytic process for the production of diesel fuel from domestic agricultural products, furfuraldehyde and plant fatty acids. In the present process, reacting medium and long chain fatty anhydrides (such as capric, caprylic, lauric and palmitic) with furfuraldehyde by a Perkin condensation produces 2-n-alkenylfurans. In a second step, the 2-n-alkenylfurans are hydrogenated to form 2-n-alkyltetrahydrofurans. Basic fuel property testing (melting point, density, kinematic viscosity, derived cetane number and calorific value) of the 2-n-alkyltetrahydrofurans indicates they are potentially useful as fuels for diesel engines. One mixture composed of 2-octyl- and 2-decyltetrahydrofuran had the best combination of fuel properties including a low melting point (−39° C.), high cetane number (63.1), high flash point (98.2° C.) and low viscosity (2.26 mm2 / sec, 40° C.) which compares favorably with specifications for diesel #2 and biodiesel.

The invention discloses a composite molecular sieve hydrogenation catalyst and a preparation method and application thereof, and belongs to the technical field of poor-quality diesel oil hydrotreatment, the composite molecular sieve hydrogenation catalyst comprises a microporous molecular sieve and modified ZMQ-1 composite molecular sieve, an active metal component and an adhesive; the microporous molecular sieve-modified ZMQ-1 composite molecular sieve takes a PEI-loaded microporous molecular sieve as a core and takes an In-Ce metal oxide doped mesoporous material ZMQ-1 molecular sieve as a shell; the loading capacity of the PEI is 9.09%-10.71%, and the doping amount of the In-Ce metal oxide is 3.85%-9.09%. With the adoption of the manner, the composite molecular sieve hydrogenation catalyst is used for hydro-upgrading of inferior diesel oil, and the yield and cetane number of the diesel oil can be effectively increased. The yield of the diesel oil can reach 99.0% or above, and the cetane number of the diesel oil can be increased by 17.1-19.9 units.

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 present invention provides a high-cetane number diesel blending component and a production method thereof. A hydrocarbon-containing feedstock is contacted with a catalyst to undergo a polymerization reaction, and the reaction product is washed and hydrogenated to obtain the high-cetane number diesel blending component. The catalyst comprises component A, component B, and component C. Also provided is a high-cetane number diesel blending component obtained using the above production method. The production method of the present invention has a simple process, outstanding product performance, low raw material cost, high yield, and good economic efficiency.

A fuel for a combustion engine, comprising 95.00 to 99.75% by mass of ammonia and 0.25 to 5.00% by mass of pilot fuel, wherein the pilot fuel is composed of hydrocarbons with a cetane number exceeding 60 and also contains 0.02 to 30.0% by mass of alkyl nitrate or a mixture of alkyl nitrates. The present invention also relates to a method for obtaining such a fuel.

The invention provides a method for precisely converting coal tar into high-cetane-number alkane through hydrogenation, which comprises the following steps: obtaining reaction data in a preliminary process condition range, if the hydrogenation depth exceeds a preset threshold value, adjusting a temperature control parameter to reduce the decyclization degree, and obtaining stable n-alkane generation efficiency through iterative calculation; according to the adjusted reaction path scheme, a hydrogenation process is operated in an actual reactor, a cetane number fluctuation range is extracted from real-time monitoring data, and whether process conditions and catalyst gradation adaptability meet target requirements or not is judged; if the fluctuation range of the cetane number exceeds a preset threshold value, analyzing the interaction influence of temperature control and pressure regulation through regression, and optimizing process conditions by adopting a gradient descent algorithm to obtain a final process parameter combination; long-term operation data of an accurate conversion result is obtained, the stability of catalyst grading and process conditions is analyzed through a machine learning algorithm, the dynamic adjustment requirement of a reaction path is judged, and a self-adaptive hydrogenation optimization model is obtained.

This invention discloses a training method, prediction method, and apparatus for a diesel cetane number prediction model, belonging to the field of petrochemical technology. The training method for the diesel cetane number prediction model includes: acquiring a training dataset, which includes explanatory variables and corresponding target variables. The explanatory variables include physicochemical index data of different diesel samples, and the target variables include the cetane numbers of different diesel samples. Based on the training dataset, a deep learning regression model is trained to obtain the diesel cetane number prediction model. The diesel cetane number prediction model constructed using this invention can quickly and accurately predict the cetane number of diesel fuel.

The invention provides a catalytic diesel oil hydro-conversion method which comprises the following steps: (1) catalytic diesel oil and hydrogen enter a hydrofining reaction unit to react, and a hydrofining material flow is obtained after the reaction; (2) separating the hydrofined material flow obtained in the step (1) in a separator to obtain a light material flow and a heavy material flow; (3) the heavy material flow obtained in the step (2) enters a hydrocracking reaction unit to react, and a hydrocracking material flow is obtained after the reaction; and (4) separating the hydrocracking material flow obtained in the step (3) to obtain gas, gasoline and diesel oil. According to the conversion method, a high-octane gasoline product can be obtained at the initial stage of start-up by optimizing the technological process, and meanwhile, the cetane number of the diesel fraction is remarkably increased.

The invention relates to the technical field of diesel oil preparation, in particular to a preparation method of environment-friendly diesel oil with an ultralow condensation point. Comprising the following steps: step 1: raw material pretreatment: S1.1, raw material component screening and proportion determination (in percentage by mass): a basic component: hydrofined diesel oil fraction (straight-run diesel oil is subjected to hydrodesulfurization / dearomatization, the distillation range is 180-360 DEG C, the sulfur content is less than or equal to 5 ppm, the aromatic hydrocarbon content is less than or equal to 10%, and the cetane number is more than or equal to 50), and the proportion is 60-70 wt%; the bio-based pour point depressing component comprises 10-15 wt% of rapeseed oil methyl ester biodiesel (the acid value is less than or equal to 0.5 mgKOH / g, the moisture is less than or equal to 0.05 wt%, and the iodine value is 100-120 gI / 100 g); the modified synthetic ester pour point depressant is a pentaerythritol fatty acid ester-polymethacrylate grafted copolymer (the number-average molecular weight is 8000-12000, and the ester content is 40-50 wt%); the condensation point of the finished diesel oil is less than or equal to-45 DEG C, the cold filter plugging point is less than or equal to-38 DEG C, the low-temperature fluidity is excellent, the finished diesel oil is suitable for all-weather use in-45 DEG C alpine regions, the sulfur content is less than or equal to 5ppm, the aromatic hydrocarbon content is less than or equal to 15%, the cetane number is greater than or equal to 52, the national VII diesel oil standard is completely met, and the particulate matter emission after combustion is reduced by 18%

The present invention relates to a method for preparing biomass liquid fuel from waste materials, and the method is as follows: After sorting kitchen waste, oil-containing agricultural and forestry waste, and industrial waste oil, performing thermal flash evaporation, solid-liquid separation, and then sterilization treatment to mix them into a waste water-oil mixture, subcritical alcohol reacts with the waste water-oil mixture in a subcritical transesterification reaction. Subcritical oil products are separated in a first separation tower with isothermal pressure reduction. The subcritical oil products react with supercritical alcohol in a supercritical transesterification reaction, and supercritical oil products are separated in a second separation tower with isobaric temperature reduction. After decolorization treatment, the finished biomass liquid fuel is obtained. Using the waste water-oil mixture treated with low-cost waste materials, without a catalyst, through the combination of subcritical transesterification and supercritical transesterification, hierarchical separation, the difficulty of controlling the continuous treatment process conditions is reduced, the process steps are simplified, the cetane number, reaction efficiency, extraction efficiency, and yield are improved, the acid value in the oil products is reduced, the atomization performance and storage stability are improved, and it meets the requirements for combustion use.

Systems and methods are provided to evaluate a middle distillate sample by determining the hydrogen partial pressure requirements in a reactor under design for processing a feedstock consisting of the middle distillate sample to achieve a target sulfur concentration of a target product stream and / or the cetane number in the target product stream.

Integrated general fuel and its preparation method and system. Its indexes are as follows: density at 20℃ is 0.775-0.830 g / cm 3 ; freezing point ≤-47℃; net heat value ≥42.8 MJ / Kg; cetane number ≥45; condensation point ≤-50℃; cold filter plugging point ≤-50℃; closed flash point ≥50℃; polycyclic aromatic hydrocarbon content ≤1 wt%; 10% recovery temperature ≤205℃; 50% recovery temperature ≤232℃; final boiling point ≤300℃. Its preparation method comprises: (1) coal direct liquefaction oil is subjected to fractionation, hydrofining and separation in sequence to obtain coal direct liquefaction full distillate; (2) coal indirect liquefaction oil is subjected to the foregoing process to obtain coal indirect liquefaction full distillate; (3) coal direct and indirect liquefaction full distillates are cut and blended. The integrated general fuel meets the main indexes of diesel and jet fuel; its preparation method and system are simple and low in cost.

A method for the continuous production of an improved diesel fuel, having enhanced ignition characteristics, more particularly with a greater electric conductivity, enhanced cetane numbers and lubricity and with greater percentage of complete combustion, resulting in less soot production and NOx reduction at the same time in an internal combustion diesel engine, breaking the tradeoff in the emission of those two pollutants from an internal combustion diesel engine.

The invention discloses a method and a system for real-time on-line regulation and control of a dual-fuel mixing ratio, the method not only simplifies a fuel supply system and reduces the cost of an engine, but also adopts the same injector to inject oil through two fuels with great physicochemical property difference, the injection atomization quality is obviously improved due to a flash boiling phenomenon, and the fuel injection efficiency is improved. The combustion efficiency is improved, and the pollutant emission is reduced; besides, due to the flash boiling phenomenon, the high-pressure injection system can greatly reduce the overhigh injection pressure, so that the driving work of the injection system is reduced, and the mechanical efficiency is improved; in addition, due to the selection of high-viscosity and high-cetane-number fuel, the corrosivity and abradability of mixed fuel in a high-pressure pump are greatly improved, and the reliability of the system is improved. Finally, due to the fact that the proportion of the mixed fuel is accurately controlled, the substitution rate of low-carbon / zero-carbon fuel can be increased, and therefore greenhouse gas emission is obviously reduced.

A mixing controlled combustion (MCC) engine includes a cylinder and a piston defining a combustion chamber. A direct injector is coupled to the cylinder and configured to deliver a low cetane fuel to the combustion chamber. An intake valve is operable to sequentially open to draw air into the combustion chamber. An exhaust valve is operable to sequentially open to expel exhaust from the combustion chamber. The exhaust valve is further operable to open during a portion of a time that the intake valve is open to draw exhaust back into the combustion chamber as rebreathed exhaust to mix with the air to form a combustion chamber gas.

To provide a diesel fuel oil composition that combines excellent ignition performance, combustion performance at low temperature, low-temperature fluidity, and fuel consumption performance.SOLUTION: A diesel fuel oil composition comprises a hydrotreated vegetable oil and at least one base material selected from desulfurized straight-run gas oil, dewaxed gas oil, and desulfurized kerosene, wherein a content of the hydrotreated vegetable oil based on a total amount of the composition is 0.1 volume percent or more and less than 70.0 volume percent, and the diesel fuel oil composition satisfies all of the following requirements: (1) a cetane number exceeding 58.0, (2) a pour point of -17.5°C or lower, (3) a cold filter plugging point of -10°C or lower, and (4) a gross calorific value exceeding 37000 J / cm3. A method for producing the diesel fuel oil composition is also provided.SELECTED DRAWING: None

A method includes blending at least one n-alkane, at least one iso-alkane or a mixture thereof, and one or more compounds according to formula (I), wherein each R independently represents a hydrogen atom or an alkyl group, to provide a composition exhibiting a density greater than 0.775 g / mL and a derived cetane number greater than 30; wherein comprises between about 50% to about 95% by weight of the one or more compounds according to formula (I) and between about 5% to about 50% by weight of the mixture of the at least one n-alkane and the at least one iso-alkane.

The present application relates to the field of fuel, and discloses a fuel composition and application thereof.The fuel composition comprises base fuel and functional fuel additive component, the functional fuel additive component comprises polymethoxy dialkyl ether, hydrocarbon, cetane enhancer and lubricant, the hydrocarbon is polycyclic hydrocarbon fuel and / or cage hydrocarbon fuel, the lubricant is selected from diacid monoester compound and fatty acid and / or fatty acid polyol ester;the content of polymethoxy dialkyl ether is 1-70 mass% based on the total mass of functional fuel additive component, the content of hydrocarbon is 15-90 mass%, the content of cetane enhancer is 0.005-10 mass%, and the content of lubricant is 0.001-5 mass%.The composition is suitable for making up the shortage of polymethoxy dimethyl ether in highland area, and improving the power and dynamic performance of fuel engine.

The invention relates to a preparation method of a special fuel for a coal-based heat engine. The method mainly comprises the following steps: 1) distilling a coal tar fraction under the pressure of 20KPa, and collecting a fraction with a boiling point of 240-340 DEG C under normal pressure to obtain the coal tar fraction; 2) carrying out selective hydrogenation ring opening on the coal tar fraction to obtain refined coal tar; 3) distilling the refined coal tar under the pressure of 20KPa, and collecting fractions with the boiling point of 240-340 DEG C under normal pressure to obtain refined coal tar fractions; 4) directly using the refined coal tar fraction as a special fuel for a thermomotor; or compounding the refined coal tar fraction with a special fuel for a petroleum-based hot-air engine to obtain the special fuel for the hot-air engine. The obtained fuel special for the hot-air engine is free of sulfur and nitrogen, high in cetane number, high in flash point and good in thermal oxidation stability, and is a high-performance fuel special for the hot-air engine.

The present invention discloses a cyclic high-density biomass liquid fuel, a preparation method thereof and an application. In the present invention, isophorone and furfural react to generate compounds of C 14 and C 19 , and then through hydrodeoxygenation synthesis, a cyclic high-density biomass liquid fuel with a carbon chain length between C 14 and C 19 is obtained. This cyclic high-density biomass liquid fuel can be directly used as an aerospace fuel, or as an additive for increasing the cetane number, and is added to the existing aerospace fuel in a certain proportion to increase the combustion calorific value.

The invention belongs to the technical field of fuel, and particularly relates to high-cleanness fuel suitable for inland ships and a preparation method of the high-cleanness fuel. According to the high-cleanliness fuel suitable for the inland ships and the preparation method of the high-cleanliness fuel, different common base oils are adopted for compatibility, and the high-cleanliness fuel suitable for the inland ships is prepared; the prepared high-cleanliness fuel has density, distillation range, cetane number, oxidation stability, cold filter plugging point, acidity, naphthenic hydrocarbon content, aromatic hydrocarbon content and polycyclic aromatic hydrocarbon content in specific ranges, so that the pollution emission and oil consumption rate of the high-cleanliness fuel product are remarkably reduced, the fuel oil production cost is low, and the preparation method is simple.

The present invention discloses a method for hydrogenation reforming of aromatic-rich diesel. The method uses aromatic-rich diesel as raw material and carries out a reaction under the action of hydrogen and a hydrogenation reforming catalyst. The reaction conditions are as follows: reaction temperature 350-390°C, total reaction pressure 5-12 MPa, liquid hourly volume space velocity 0.5-3 h ‑1 , the hydrogen-to-oil volume ratio is 400: 1 to 1200: 1, the hydroreforming catalyst contains HZSM-23 molecular sieve and modified Y molecular sieve, the total acid amount of the catalyst is 0.131 to 0.196 mmol / g, preferably 0.135 to 0.181 mmol / g; the weak acid content is 34 to 55%, preferably 36 to 52%. The method can ensure the diesel yield while catalyzing the hydroreforming of aromatic-rich diesel, and can also increase the cetane number of diesel, effectively lowering its pour point.

An engine includes a piston movable within a combustion cylinder, a direct fuel injector, and a hotspot fuel igniter. The hotspot fuel igniter includes a core exposed to the combustion cylinder, to ignite fuel spray plumes of a directly injected fuel, and an insulator insulating the core from heat transfer with a material of the piston. Applications include igniting a range of fuels, including lower cetane number fuels.

This invention discloses a processing method for high-sulfur, high-nitrogen inferior diesel fuel. The method includes the following steps: (1) In the presence of hydrogen, the inferior diesel fuel is mixed with an alkali metal and then enters an alkali metal treatment reaction zone; (2) The reaction effluent obtained in step (1) enters a separation unit to obtain a liquid phase stream; (3) The liquid phase stream in step (2) is mixed with an oxidant and enters an oxidation reaction zone for reaction; (4) The reaction effluent obtained in step (3) enters an extraction unit, and the final clean diesel fuel product is obtained under the action of an extractant. The method uses non-hydrogenation technology to process inferior diesel fuel and can directly produce clean diesel fuel with low sulfur, low nitrogen, and high cetane number.

This invention discloses a diesel liquid nano-additive and its preparation method, comprising the following components by mass percentage: 0.02-0.5% rare earth-based nano-catalyst, 52-67% cetane number improver, 1-5% smoke suppressant, 3-19% detergent-dispersant, 3-8% pour point depressant, 7-20% antioxidant, and 5-13% lubricant. This invention enables catalytic combustion of diesel fuel, simultaneously promoting the combustion of CO, HC, and soot, reducing particulate matter formation during the main combustion period, lowering exhaust pollutant emissions, ultimately achieving energy savings, enhanced power, ultra-low exhaust emissions, and significantly improving the calorific value of diesel fuel, achieving an energy-saving efficiency of over 37%, demonstrating significant energy-saving effects.

The application relates to the technical field of cetane number testing, and discloses standard fuel and application of the standard fuel in a fuel cetane number determination method. The standard fuel comprises low-cetane-number normal standard fuel and high-cetane-number normal standard fuel; wherein the low-cetane-number normal standard fuel is a hanging type tetrahydrodicyclopentadiene, and the high-cetane-number normal standard fuel is selected from one of normal dodecane, normal decane and normal tetradecane. The standard fuel provided by the application has a good volume linear relationship, strictly meets the requirements of normal standard fuel, can expand the cetane number determination range of test fuel to 21.88-81.19, can greatly reduce the test cost, and is suitable for promotion.