A kind of molecular grade diesel oil blending method
A molecular-grade diesel technology, applied in the petroleum industry, instruments, liquid carbon-containing fuels, etc., can solve problems such as excess quality, high cost of enterprise reconciliation, complex composition, etc., to avoid excess or shortage, reduce analysis costs, and reduce reconciliation cost effect
Active Publication Date: 2021-01-29
SYSPETRO TECH CO LTD
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Problems solved by technology
In addition, some diesel properties are obtained through the simple correlation of other properties, lacking theoretical basis
[0004] The blending properties calculated by empirical formulas do not take into account the influence of the intermolecular forces of diesel oil, and there are often large errors between the calculated blending properties and the measured properties, resulting in inaccurate calculation of the blending formula, diesel blending formula is not optimal, and the blended diesel oil If the key quality indicators are not up to standard or the quality is excessive, secondary reconciliation is often required, and the cost of enterprise reconciliation is high
[0005] In order to achieve molecular level blending of diesel oil, the molecular composition information of diesel blending components must be mastered. Due to the variety of diesel molecules and complex composition, existing analysis methods cannot analyze the composition of diesel oil in detail, and high-resolution mass spectrometry can only analyze the carbon number of diesel oil. The content data of polycyclic aromatic hydrocarbons, and the analytical instruments are expensive, and the analysis cost is high
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Embodiment
[0039] Embodiment: The molecular grade diesel oil blending method is illustrated below with the -10 vehicle diesel blending example. The goal of blending optimization is the minimum cetane number excess of diesel oil, that is, the quality card edge of cetane number. The blending constraint condition is that all blending indexes must meet the index range. The index range is shown in Table 1.
[0040]
[0041]
[0042] Table 1
[0043] Such as figure 1 Shown, a kind of molecular grade diesel oil blending method comprises the steps:
[0044] 1. Establish a diesel molecular library. The molecular library contains part or all of the diesel family components in Table 2. Each racial composition contains several molecules, and then the molecular properties of each molecule are obtained through laboratory testing and analysis or by consulting published data. , including molecular density at 20°C, boiling point at normal pressure, relative molecular mass, cetane number, freezing...
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The invention relates to a molecular grade diesel blending method. A molecule-based diesel character modeling method is adopted, molecule character modeling is adopted, and various characters such asa cetane value, a cetane index, a condensation point, a cold filter point, a flash point(a closed opening) kinematic viscosity, the polycyclic arene content, the boiling range temperature, the densityand the sulphur content are calculated accurately, wherein the molecular grade diesel character calculation method is applicable to any diesel, and the accuracy is high compared with a traditional method; in addition, the diesel molecule composition is obtained by adopting the method for analyzing the diesel molecular concentration from diesel macroscopic property inversion, the analyzed molecules can truly reflect the diesel composition, and the method for obtaining diesel molecules is low in cost and high in speed compared with instrument analysis; the calculated blending formula is the optimal formula, the blending character meets the requirement for blending, and the enterprise cost can be effectively lowered.
Description
technical field [0001] The invention relates to the technical fields of petroleum refining and petrochemical production, in particular to a method for blending molecular grade diesel oil. Background technique [0002] The finished diesel oil is generally blended by various diesel blending components in an appropriate proportion. The components that can be blended include straight-run diesel, catalytic diesel, coked diesel, hydrorefined diesel, hydrocracked diesel, etc. Only qualified diesel oil can meet the requirements of the national standard. At present, the national VI vehicle diesel standard includes No. 5, No. 0, No. -10, No. -20, No. -35 and No. -50. As the requirements for environmental protection become higher and higher, the standard of finished diesel oil will also become higher and higher. The national standard of diesel oil product oil cetane number, cetane index, freezing point, cold filter point, flash point (closed) , kinematic viscosity, polycyclic aromatic...
Claims
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IPC IPC(8): C10L1/04G16C10/00
Inventor 何恺源艾双
Owner SYSPETRO TECH CO LTD