CHARACTERIZATION AND PREDICTION OF JET FUEL QUALITY

摘要

Systems and methods are provided for characterizing kerosene fractions in order to determine whether the fractions will satisfy a desired thermal breakpoint specification. Additionally, hydrotreating conditions can be determined that will result in a hydrotreated kerosene fraction that satisfies the desired thermal breakpoint specification. The hydrotreating conditions can be determined based on a model constructed from data corresponding to a plurality of reference samples. The model can include data for compositional groups within the reference samples. The data for compositional groups can be derived from Fourier transform ion cyclotron resonance mass spectrometry data or from another suitable characterization technique.

主权项

1. A method for preparing a jet fuel or kerosene product, comprising:
measuring a thermal breakpoint for a plurality of kerosene fractions; measuring one or more of a sulfur content, a nitrogen content, an aromatics content, and an API gravity for the plurality of kerosene fractions; analyzing the plurality of kerosene fractions, using Fourier transform ion cyclotron resonance mass spectrometry, to determine weights for the plurality of compositional groups within each kerosene fraction; constructing a model for correlating a thermal breakpoint of a kerosene fraction with a) the one or more of a sulfur content, a nitrogen content, an aromatics content, and an API gravity for a kerosene fraction, and b) weights for a plurality of compositional groups in a kerosene fraction, the model being constructed based on the measured thermal breakpoints for the plurality of kerosene fractions, the measured values for the one or more of a sulfur content, a nitrogen content, an aromatics content, and an API gravity for the plurality of kerosene fractions, and the determined weights for the plurality of compositional groups for the plurality of kerosene fractions; determining, for a first kerosene fraction, a thermal breakpoint and the one or more of a sulfur content, a nitrogen content, an aromatics content, and an API gravity; assigning weights for a plurality of compositional groups for the first kerosene fraction based on the determined thermal breakpoint and the determined one or more of a sulfur content, a nitrogen content, an aromatics content, and an API gravity; selecting hydroprocessing conditions for the first kerosene fraction based on the assigned weights for the plurality of compositional groups, the determined one or more of a sulfur content, a nitrogen content, an aromatics content, and an API gravity, and the constructed model; and hydroprocessing the first kerosene fraction using the selected hydroprocessing conditions.