95 results about "Octane rating" patented technology

The invention provides an alcohol-based automotive clean fuel and a preparation method thereof. The alcohol-based fuel comprises the following components in parts by weight: 60-90 parts of methanol, 2-10 parts of ethanol, 1-5 parts of multi-carbon alcohol, 5-15 parts of aliphatic ether, 0.2-2 parts of a catalyst, 2-6 parts of peroxide and 1-3 parts of a corrosion inhibitor. The alcohol-based fuel prepared by the invention has a relatively high octane number, which shows that the anti-knock property is good, and knock is not easy to occur when the alcohol-based fuel is used in an engine; the sulfur content is relatively low, so that the corrosion to engine parts can be reduced, the emission of sulfur dioxide is reduced, and the environmental pollution is reduced; the density is relatively high, so that the combustion heat value can be improved, and the stability in the storage and transportation processes is higher; the copper sheet corrosion grade is low, which shows that the corrosion to metal is low; compared with the prior art, the alcohol-based fuel has low emission of HC, CO and NOx, which indicates that the alcohol-based fuel is greener and cleaner, and the raw materials such as methanol and ethanol can be prepared from renewable resources such as wood chips, corncobs, cereals and straws, so that the requirement of sustainable development is met.

A gasoline fuel composition for a spark ignition internal combustion engine comprising (a) renewable naphtha at a level from 40 to 60% v / v, (b) oxygenated hydrocarbon at a level from 15% v / v to 25% v / v, and (c) aromatic hydrocarbon at a level from 25% v / v to 45% v / v, 5 wherein the gasoline fuel composition has a RON of 87 or greater. While the low octane number of renewable naphtha would normally severely restrict its blendability in gasoline to low levels, the fuel composition of the 10 present invention allows the use of renewable naphtha in significant levels while maintaining a good octane rating for the overall composition.

Blending a finished gasoline using a gasoline blending model that is derived from correlations between empirically measured octane numbers and spectral features identified in near-infrared (NIR) spectral data for a group of gasolines and gasoline subcomponents. The correlations are incorporated into generalized blend models for motor octane number and road octane number, which are incorporated into programing executed by a controller that controls the volumetric blend ratio of one or more neat gasolines and / or gasoline sub-components to produce a finished gasoline. In some embodiments, the NIR spectral data utilized for developing the model is contributed by analysis of multiple subsets of gasolines and gasoline subcomponents, where each subset is analyzed by a different NIR spectrometer.

The invention relates to a method for reducing benzene content in gasoline and a method for producing low-benzene gasoline. The method comprises the following steps: performing high-precision distillation cutting on benzene-rich gasoline to obtain gasoline light fraction, middle fraction and heavy fraction; the benzene-rich gasoline middle fraction enters a moving bed or fluidized bed or fixed bed reactor to be in graded contact with a low-carbon olefin-rich material flow for catalytic alkylation with a mesoporous molecular sieve catalyst, and benzene is efficiently converted into alkylbenzene, so that the benzene-rich gasoline is converted into high-octane-number low-benzene gasoline and liquefied gas. The method provided by the invention reduces the benzene content and olefin content in gasoline, improves the octane number of gasoline and increases the yield of liquefied gas, not only solves the problem that refinery gasoline has high benzene content and is difficult to meet the national VI standard of motor gasoline, but also improves the quality of gasoline and increases the yield of liquefied gas.

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.

The utility model belongs to the field of high-octane gasoline production, and particularly relates to a device for producing high-octane gasoline from topped oil through non-hydroisomerization. The raw material conveying pump is connected with the C4 feeding device through a valve and is used for conveying the raw materials; the raw material / reaction product heat exchanger is connected with the raw material conveying pump and is used for carrying out heat exchange on the raw materials; according to the utility model, the topped oil of the reforming device is used as a raw material, a second-section feeding process and a third-section feeding process are added in the reactor, and a circulating gas process from the outlet of the compressor to the reaction system is added, so that the raw material / reaction product is obtained. Under the non-hydrogen condition, the reaction depths of alkane cracking, selective hydrogenation, isomerization and the like of the low-octane-number topped oil are improved on the basis of the catalyst, the low-octane-number topped oil is converted into the high-octane-number gasoline blending component, the octane number of the produced gasoline can reach 89-90, the saturated vapor pressure is 65-80 kPa, the improvement cost is low, and the production operation is simple.

Methods and systems for improving operation of a gasoline desulfurization system may include receiving gasoline blending pool data, the gasoline blending pool data indicative of one or more of a sulfur concentration, a current inventory, or an octane number of each current component of a gasoline blending pool. A machine learning model generates a light naphtha sulfur target for a light naphtha produced from a selective hydrogenation reactor of a gasoline desulfurization system based on the gasoline blending pool data and generates a heavy naphtha sulfur target for a desulfurized heavy naphtha produced from a hydrodesulfurization reactor of the gasoline desulfurization system based on the gasoline blending pool data. The machine learning model may be trained on historical data of the gasoline blending pool and historical data of operating parameters, resulting product attributes, and composition from the gasoline desulfurization system, including sulfur concentration and octane number.

The present invention relates to a synergistic antiknock fuel additive comprising a mixture of N-methyl-p-anisidine and m-toluidine in a volume ratio from 45:55 to 95:5; to the use of said fuel additive to increase the octane rating of a gasoline; and to a gasoline fuel composition comprising said fuel additive.

The present application relates to the technical field of aviation gasoline, and discloses unleaded aviation gasoline and a preparation method thereof.The unleaded aviation gasoline comprises: 75-85 wt% of polymethylbenzene, and 15-25 wt% of at least two of alkylate, a side line distillation component of an alkylate device, light naphtha and isopentane; wherein the motor octane number of the polymethylbenzene is not less than 108.The product quality index of the unleaded aviation gasoline meets the standard of the American Society for Testing and Materials, that is, the technical requirement of ASTM D7719-2018 high-aromatic unleaded aviation gasoline.The unleaded aviation gasoline has the characteristics of good component continuity, stable combustion and high motor octane number, and meets the high-standard use requirement of unleaded and high-octane aviation gasoline.

The utility model discloses an online real-time gasoline octane number detection monitor, which relates to the technical field of gasoline detection and comprises a crude oil process pipeline, a U-shaped detection pipe and a mounting plate. The device comprises a U-shaped detection pipe, the U-shaped detection pipe is fixedly installed at the bottom of a crude oil process pipeline, the two ends of the U-shaped detection pipe are both communicated with the crude oil process pipeline, a first valve body and a second valve body are installed in one end of the U-shaped detection pipe from top to bottom, and a reflux pump and a partition plate located above the reflux pump are installed in the other end of the U-shaped detection pipe. The PLC controls the servo motor to open or close the first valve body and the second valve body through the screw rod, the inner threaded pipe, the rack and the gear, an oil product is sampled, the octane number of the oil product is detected by the measuring probe, a detection result is transmitted to the measuring instrument and then passes through the measuring instrument, and the detection result is transmitted to a user side through a wireless data transmission function of the PLC. On-line detection and monitoring on the quality of crude oil are realized, and the quality of the oil product during delivery is ensured.

This specification discloses a gasoline fuel component mainly containing C4 - C9 n - paraffins, C4 - C9 mono - branched i - paraffins, and C4 - C9 multi - branched i - paraffins. In the gasoline fuel component, the weight ratio of at least certain i - paraffins to certain n - paraffins is higher than that in gasoline components of the prior art. This gasoline fuel component can provide improved blendability, octane number, and combustion characteristics.

This invention relates to the field of new energy and liquid carbon fuel technology, specifically to a high-cleanliness methanol alternative fuel for vehicles and its preparation method. The method includes raw material mixing and vaporization, atmospheric pressure gas-phase catalysis, and multi-stage condensation and separation steps. The method combines base methanol with hydrocarbon additives and introduces them into a composite mixed-bed molecular sieve catalyst containing aromatic cascade, etherification, and alkylation active units, as well as an anti-coking flow carrier. Its core principle is to enhance the octane number by following the atmospheric pressure gas-phase aromatization and cascade mechanism, generate ethers in situ as phase stabilizers and hydrogen bonding agents, and utilize a mesoporous carrier to reduce steric hindrance and promote macromolecular desorption. This invention differs from the high-pressure reaction conditions of traditional methanol-to-gasoline processes by overcoming the defects of methanol fuel phase separation upon contact with water and catalyst coking through a one-step atmospheric pressure gas-phase conversion. It eliminates the need for physical co-solvents and significantly extends the catalyst regeneration cycle.

The application discloses an engine ignition angle adjusting method, device, equipment and storage medium, and the method comprises the steps of detecting the knock intensity of the engine, controlling the ignition angle of the engine according to the knock intensity, and adjusting the ignition angle of the current gasoline octane number according to the knock back angle of the ignition angle. According to the application, the ignition angle of the engine is controlled according to the knock intensity, and the ignition angle of the current gasoline octane number is adjusted according to the knock back angle of the controlled ignition angle, so that the ignition angle can be adjusted according to different gasoline octane numbers, the knock intensity of the ignition angle at the time of ignition is adjusted, and the performance of the engine is improved.

The invention provides a non-metal gasoline antiknock agent and a preparation method thereof, and belongs to the technical field of antiknock agents, the non-metal gasoline antiknock agent comprises a compound shown as a formula I and a compound shown as a formula II, and the mass ratio of the compound shown as the formula I to the compound shown as the formula II is (7-10): (3-5). The effect of the prepared antiknock agent is obviously improved, furan structures possibly substituted at different positions can provide different combustion paths in the combustion process, and the synergistic interaction effect is achieved, so that the antiknock effect is obviously achieved, and the octane number of gasoline is obviously increased. The formula I of the imgabs 0 # is shown in the specification, and the formula II of the imgabs 1 # is shown in the specification.

A high-octane renewable base gasoline composed of a reformate renewable base component and an isomerate base component is described, wherein said base gasoline is present in a high octane fully renewable gasoline fuel composition.

The utility model discloses a knock detector for a motor octane number tester, which belongs to the technical field of knock detectors and comprises a shell and an inner core positioned in the shell, and an initial coil with N turns and D diameter is wound on the inner core; the device is characterized in that the initial coil comprises a first initial coil and a second initial coil; the first initial coil and the second initial coil are connected through an additional coil; the diameter of the additional coil is 0.5 D. The number of turns of the additional coil is N. The coil of the knock detector is optimally designed and improved, so that the sensitivity of the knock detector is remarkably improved. By means of the improvement, the knock detector can more sensitively capture tiny changes in the oil combustion process in the detection process, and therefore the detection precision is greatly improved. Therefore, the measured octane number result of the oil product is more accurate and reliable, and more accurate data support is provided for evaluation of the quality of the oil product.

To provide an engine system capable of improving combustion stability while preventing constant combustion.SOLUTION: A fuel injection device 11,12 that injects a main fuel, a first fuel having a combustion speed faster than that of the main fuel, and a second fuel having an octane number higher than that of the main fuel into the combustion chamber 5 as a fuel is provided, and when an engine load is less than a switching load Tx, the main fuel and the first fuel are injected into the combustion chamber 5; Further, the fuel injection device 11,12 is controlled so that the first fuel is injected after the main fuel is injected, and when the engine load is the switching load Tx or higher, the fuel injection device 11,12 is controlled so that the main fuel and the second fuel are injected into the combustion chamber 5 and the second fuel is injected after the main fuel is injected.SELECTED DRAWING: Figure 5

A gasoline fuel composition for a spark-ignition internal combustion engine, the gasoline fuel composition comprising (a) renewable naphtha at a level of 40% to 60% volume / volume, (b) an oxidized hydrocarbon at a level of 15% to 25% volume / volume, and (c) an aromatic hydrocarbon at a level of 25% to 45% volume / volume, 5 wherein the gasoline fuel composition has an RON of 87 or greater. Although the low octane number of renewable naphtha typically strictly limits its blendability in gasoline to a low level, the fuel composition of the invention allows the use of renewable naphtha at significant levels while maintaining a good octane rating for the entire composition.

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.

A control device for an internal combustion engine is provided with: a spark-ignition internal combustion engine; a sensor that detects the rotational speed and load of the internal combustion engine; and an ignition timing control unit that controls the ignition timing of the internal combustion engine on the basis of the rotational speed, the load, and the characteristics of a reference ignition timing determined to be the later one of an optimal ignition timing and a knock ignition timing that are predetermined on the basis of the rotational speed and the load. The optimal ignition timing is predetermined in accordance with the rotational speed and the load such that the torque is maximum. The knock ignition timing is predetermined so that knock does not occur when fuel of a reference octane number is supplied to the internal combustion engine. The ignition timing control unit calculates a first hysteresis amount obtained by multiplying the difference between the octane number of the fuel supplied to the internal combustion engine and the reference octane number by a predetermined hysteresis amount, corrects the knock ignition timing to be delayed by the first hysteresis amount, and controls the knock ignition timing according to the rotational speed and the load. When the operation region of the internal combustion engine is either a load region on the high load side from the optimal operation line or a maximum output region, a second hysteresis amount is calculated on the basis of the predetermined hysteresis amount, and the reference ignition timing is corrected to be delayed by the second hysteresis amount.

This invention provides a special lubricating oil for multi-fuel spark-ignition two-stroke engines used in unmanned aerial vehicles (UAVs) and its preparation method, belonging to the field of lubricating oil technology. The special lubricating oil for multi-fuel spark-ignition two-stroke engines for UAVs comprises, by weight percentage: base oil, 66-81 wt%; additives, 15-20 wt%; and diluent, 4-14 wt%. The base oil includes hydrocarbon-based oil, polyisobutylene, and synthetic esters, wherein the hydrocarbon-based oil is a mixture of 70-85 wt% Group III hydrogenated mineral oil and 15-30 wt% Group IV hydrocarbon synthetic oil. The additives include a composite detergent-dispersant, a composite anti-adhesion detergent, a friction-reducing and anti-wear agent, an antioxidant, an octane number improver, and a compounding agent, wherein the octane number improver is N-methylaniline. The diluent is aviation kerosene.

The invention discloses an additive for increasing gasoline octane number and reducing oil slurry without increasing liquefied gas as well as a preparation method and application of the additive. The preparation method comprises the following steps: step 1, stirring kaolin, pseudo-boehmite, alumina sol and a first solvent to obtain first slurry; step 2, adding an H-ZSM-5 molecular sieve, two Zn-containing compounds, a phosphorus-containing compound and a second solvent into the first slurry in the step 1 to obtain second slurry; and step 3, adjusting the pH value of the second slurry, adding macroporous bauxite, and continuing pulping, homogenizing, forming and roasting to obtain the additive for increasing the gasoline octane number and reducing the oil slurry without increasing liquefied gas. According to the catalytic cracking aid developed by the invention, the octane number of gasoline can be increased by 1-2 points under the conditions that the liquefied gas yield is not greatly increased and the gasoline yield is not reduced.

The invention relates to the technical field of chemical engineering, in particular to a gasoline octane number prediction method based on a near infrared spectrum. According to the near infrared spectrum-based gasoline octane number prediction method provided by the invention, when a partial least square method correction model is constructed, a target spectrum in a gasoline sample is preprocessed for at least one time, the preprocessed spectrums are spliced to obtain a spliced spectrum, then a target feature point is selected from the spliced spectrum, and the octane number of the gasoline sample is predicted according to the target feature point. Then taking the target feature point as a target feature variable, constructing a partial least square correction model according to the spliced spectrum and the octane number in each gasoline sample, finally performing at least one pretreatment on the near infrared spectrum to be detected of the gasoline sample to be detected, and then performing splicing treatment to obtain a spliced spectrum to be detected, and the spliced spectrum to be measured is input into the partial least square method correction model for prediction to generate a predicted octane number, so that the prediction accuracy is improved.

The utility model discloses a self-gravity infrared system octane number standard fuel automatic sample matching device, which relates to the technical field of sample matching and comprises a sample matching frame, a supporting plate is arranged on one side of the inner top of the sample matching frame, a plurality of gallon barrels are arranged on the top of the supporting plate, and weight detection components are arranged at the bottoms of the gallon barrels. A plurality of measuring tubes are arranged on the other side of the top of the sample distribution frame, a mixing assembly matched with the measuring tubes is arranged on one side of the inner bottom of the sample distribution frame, and infrared detection devices matched with the mixing assembly are arranged at the two ends of the outer portion of the sample distribution frame. According to the utility model, the weight of materials in the gallon barrel can be monitored in real time, the accuracy of each-time sample preparation is ensured, according to weight data fed back by the weighing sensor, when the materials in the gallon barrel reach a fixed value of blanking, the pinch valve is opened through the controller, the materials are conveyed into the hose, and the materials naturally flow into the hose under the action of self-gravity, so that the sampling accuracy is ensured. And no additional pump or pressurization equipment is needed.

The present invention discloses a method for preparing high-octane gasoline. The method uses methanol and naphtha as raw materials. The raw materials are contacted with an aromatization catalyst in a moving bed reactor for reaction. The reacted materials are separated to obtain high-octane gasoline. The catalyst is discharged from the bottom of the moving bed reactor and recycled back to the moving bed reactor directly or after regeneration. The method can improve the liquid yield of gasoline and the service life of the catalyst, and can continuously produce high-octane gasoline.

Provided in the present invention are a controllable preparation method for producing a functional material with a high yield while reducing olefins in gasoline, an upgraded blended gasoline and a functional material. The method comprises fractionating an FCC gasoline feedstock to obtain a light gasoline fraction and a heavy gasoline fraction; the light gasoline fraction and maleic anhydride undergoing a dynamic polymerization reaction so as to obtain a functional material and a filtrate mixture component; distilling the filtrate mixture component to obtain light gasoline having a low olefin content; the heavy gasoline fraction undergoing an upgrading reaction, and then blending same with the light gasoline to obtain upgraded blended gasoline having a low olefin content and a high octane number. The present invention can produce the functional material having a large molecular weight range and strong controllability while reducing olefins.

The invention provides a method for reducing benzene content in gasoline by catalyzing transalkylation and a method for producing gasoline with low benzene content. The method comprises the following steps: performing high-precision distillation cutting on benzene-rich gasoline to obtain gasoline light fraction, middle fraction and heavy fraction; a gasoline middle fraction rich in benzene and gasoline and diesel oil fractions rich in C9 and C10 monocyclic heavy aromatics which are injected in a graded manner enter a fluidized bed or moving bed or fixed bed reactor to be in contact with a mesoporous molecular sieve catalyst for catalytic transalkylation reaction, so that benzene and heavy aromatics are efficiently converted into xylene and the like; therefore, the benzene-rich gasoline and the catalytic cracking light diesel oil are converted into the high-octane-number low-benzene gasoline. According to the method, the benzene content and the olefin content in the gasoline are reduced, meanwhile, the octane number of the gasoline is increased, the problem that refinery gasoline is high in benzene content and difficult to meet the national VI standard of automotive gasoline is solved, the diesel-gasoline ratio of a catalytic cracking device is reduced, and the yield of high-quality gasoline is increased.

Control apparatus for spark ignition type of internal combustion engine, includes: sensor detecting rotation speed and load of engine; and ECU controlling ignition timing of engine based on rotation speed and load and characteristic of reference ignition timing. ECU: calculates first retard amount by multiplying difference between octane number of fuel currently supplied to engine and reference octane number by predetermined retard amount; compensates knock ignition timing to be retarded by first retard amount; and calculates second retard amount based on predetermined retard amount and compensates reference ignition timing to be retarded by second retard amount when operation region of engine defined by rotation speed and load becomes either one of predetermined load region higher in load than optimum operation line in which net fuel consumption rate of engine is highest or maximum output region in which output of engine is maximized.