30 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.

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 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 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.

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.

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%

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.

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 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.

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.

The invention relates to the technical field of coal tar hydrogenation, and particularly discloses a method for producing high-cetane-number light fuel oil through coal tar hydro-upgrading. The method comprises the following steps: performing centrifugal deslagging pretreatment on a coal tar raw material, mixing the coal tar raw material with a core-shell structure nano composite material, and performing continuous flow microwave program temperature control pretreatment; then solid-liquid and gas-liquid separation is carried out, a liquid phase sequentially enters a two-section fixed bed hydrogenation system, the first section is subjected to molecular sieve adsorption purification and preliminary hydrogenation, and the second section is in contact with a high aromatic hydrocarbon saturation catalyst for deep hydrogenation saturation and light conversion; and finally, carrying out gas-liquid separation and fractionation to obtain the high-cetane-number light fuel oil. Through the synergistic effect of microwave pretreatment and two-stage gradient hydrogenation, the problems that heavy components of coal tar are difficult to treat and a catalyst is prone to inactivation are solved, deep impurity removal and oriented regulation and control of hydrocarbon structures are achieved, the product quality is improved, the process is efficient and stable, efficient utilization of coal tar resources can be achieved, and the method is suitable for industrial production.

The invention relates to a marine fuel composition comprising CNSL with added content and an improved cetane number. The composition comprises: - 65 to 99% by mass of a first component (a) comprising a fossil base, this first component having a sulfur content of not more than 1.5% by mass, preferably not more than 1% by mass, more preferably not more than 0.7% by mass, and a flash point of at least 60 °C, - 1 to 35% by mass of a second component (b) consisting of cashew nut shell liquid (CNSL), - 500 to 5000 ppm by mass of a composition (c) of additives relative to the sum of the masses of components (a) and (b), said composition (c) of additives comprising: (i) one or more cetane number improving additives, (ii) one or more deposit-reducing additives. Abbreviated figure: Figure 1

The utility model discloses a cetane number measuring machine supercharging device which comprises a supercharger, a check valve, a hydraulic pump and an electromagnetic directional valve, the supercharger is connected with the check valve, a fuel oil outlet is formed in the side wall of the supercharger, a fuel oil inlet is formed in the bottom of the check valve, the electromagnetic directional valve is connected with the supercharger through an oil pipe, and the hydraulic pump is connected with the electromagnetic directional valve. The hydraulic pump is connected with the electromagnetic directional valve through an oil pipe, a high-pressure piston and a low-pressure piston which are in linkage are arranged in the supercharger, and the electromagnetic directional valve is used for controlling the flow direction of hydraulic oil to achieve reciprocating motion of the high-pressure piston and the low-pressure piston. The utility model has the advantages that: the supercharge ratio is high: stable high-pressure output is realized through the area ratio (10: 1) of the high-pressure piston and the low-pressure piston; a mechanical balance mechanism in a high-pressure area ensures that the pressure is constant, and pressure is automatically supplemented during leakage; the electromagnetic reversing valve and the proportional overflow valve are integrated, so that dependence on external elements is reduced; due to neutral-position unloading of the reversing valve, invalid energy consumption is reduced.

A fuel for a combustion engine comprises from 95.00% to 99.75% by weight of ammonia and from 0.25% to 5.00% by weight of a pilot fuel comprising hydrocarbons having a cetane number greater than 60 and containing from 0.02% to 30.0% by weight of an alkyl nitrate or alkyl nitrate mixture. The invention also relates to a method for obtaining such a fuel.

System, control method of the system, and vehicle including the system. In particular, the present disclosure relates to an internal combustion engine system (10) for a vehicle, comprising: an internal combustion engine ICE (20) operable on a low cetane number fuel (32), the internal combustion engine having a cylinder at least partially defining a combustion chamber and an ignition source for the low cetane number fuel; a fuel injector (30) for injecting the low cetane number fuel into the combustion chamber; an ignition improver device (40) in fluid communication with the fuel injector and further configured to supply an ignition improver fluid to the low cetane number fuel; a control unit (90) configured to selectively operate the ICE in a spark ignition SI mode and a compression ignition CI mode, wherein the control unit is configured to determine ICE operating conditions and to control the ignition improver device to supply a given amount of ignition improver fluid to the low cetane number fuel based on the determined ICE operating conditions.

An engine system including a fuel supply system and a fuel injection system for fueling with a main fuel and a pilot fuel, where the main fuel is a relatively low cetane number liquid fuel and the pilot fuel is a relatively higher cetane number fuel. The engine system can operate an LCDI operating mode with the main fuel and the pilot fuel or a monofuel operating mode with only the pilot fuel. The pilot fuel can be injected through main injection holes in the monofuel operating mode. A fuel injector can be adapted during manufacturing for the liquid fuel or for a gaseous fuel.

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.

When fuel is added to a fuel tank, an ECU (100) receives the fuel's density (pf) (S10) and cetane number (Cn) (S11). The ECU (100) then calculates T50 (distillation properties) using a T50 calculation chart based on the density (pf) and cetane number (Cn) (S12). This allows for accurate detection of the distillation properties of the fuel added to the fuel tank.

The invention discloses a detection device and a detection method of gasoline octane number and diesel cetane number, relates to the technical field of fuel detection devices, and aims to solve the problem of how to improve the detection speed of gasoline octane number and diesel cetane number. The detection device comprises an air source assembly, a fuel oil assembly, a reactor, a heating assembly, a temperature detection assembly and a controller, the air source assembly and the fuel oil assembly are both connected with the reactor, the air source assembly is used for introducing air with preset pressure into the reactor, and the fuel oil assembly is used for introducing fuel oil with preset volume into the reactor. The heating assembly is connected to the reactor and used for heating so that the fuel oil and the air can be subjected to a cold flame reaction. The temperature detection assembly is connected to the reactor and used for detecting the temperature value in the reactor when the fuel oil and the air are subjected to the cold flame reaction. And the controller is connected with the temperature detection assembly and is configured to obtain the temperature value, calculate the temperature change value within the preset time and determine the gasoline octane number and the diesel cetane number according to the temperature change value.

The application discloses a kind of negative carbon type compression ignition clean fuel and its preparation method and use, belong to clean alternative fuel technical field.The fuel is by 45-55% hydrogenated vegetable oil, 20-30% green fischer-tropsch synthesis alkane, 10-20% polyoxymethylene dimethyl ether, 0.5-8% biological ester and 0.5-5% composite additive composition, does not contain any fossil hydrocarbon component, and whole life cycle carbon intensity≤-20g CO2eq / MJ.The application prepares fuel by raw material pretreatment, multiphase shearing mixing, additive compounding, on-line quality adjustment, product cetane number≥70, flash point>70℃, can be directly used in various compression ignition internal combustion engine, only needs light seal piece adaptation, with the advantages of negative carbon environmental protection, safe and economical, ready-to-use compatible, can effectively help traffic field deep decarbonization.