5 results about "Cetane number" patented technology

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.

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 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 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.