Hydrocarbon group-type analysis of high boiling petroleum distillates by HPLC

Qiang, Dongmei; Lu, Wanzhen

doi:10.1016/s0920-4105(98)00054-0

Cited by 9 publications

(6 citation statements)

References 32 publications

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“…Group-type separations of diesel fuels have been performed with gas chromatography (GC), − high-performance liquid chromatography (HPLC), − LC-GC, , SFC-GC, SFC-MS, and recently a number of hyphenated techniques have been reviewed. − Most commonly used HPLC detectors yield a nonuniform response for saturates and aromatics, ,− mandating the use of complex calibrations. However, the use of an FID provides reliable mass quantification of the different hydrocarbon group-types. ,− When more complex hyphenated techniques are used, reliable quantification becomes more difficult, especially when mass spectrometric detectors are used, as they too give nonuniform responses in group-type separations .…”

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confidence: 99%

Determination of Hydrocarbon Group-Type of Diesel Fuels by Gas Chromatography with Vacuum Ultraviolet Detection

2016

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A GC-vacuum ultraviolet (UV) method to perform group-type separations of diesel range fuels was developed. The method relies on an ionic liquid column to separate diesel samples into saturates, mono-, di-, and polyaromatics by gas chromatography, with selective detection via vacuum UV absorption spectroscopy. Vacuum UV detection was necessary to solve a coelution between saturates and monoaromatics. The method was used to measure group-type composition of 10 oilsands-derived Synfuel light diesel samples, 3 Syncrude light gas oils, and 1 quality control sample. The gas chromatography (GC)-vacuum UV results for the Synfuel samples were similar (absolute % error of 0.8) to historical results from the supercritical fluid chromatography (SFC) analysis. For the light gas oils, discrepancies were noted between SFC results and GC-vacuum UV results; however, these samples are known to be challenging to quantify by SFC-flame ionization detector (FID) due to incomplete resolution between the saturate/monoaromatic and/or monoaromatic/diaromatic group types when applied to samples heavier than diesel (i.e., having a larger fraction of higher molecular weight species). The quality control sample also performed well when comparing both methods (absolute % error of 0.2) and the results agreed within error for saturates, mono- and polyaromatics.

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confidence: 99%

Determination of Hydrocarbon Group-Type of Diesel Fuels by Gas Chromatography with Vacuum Ultraviolet Detection

2016

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“…Often group type separation of crude oil, heavy fractions, and residues by HPLC uses bonded phase columns or a combination of silica and bonded phase columns, and an alkane as mobile phase. ,,,, Typically two columns are used to separate saturates from aromatics, such as amino, cyano, or silica columns. Then the mobile phase flow is reversed so that the late eluting components elute out as one peak and are “backflushed” in order to speed up the analysis. , Previous chromatographic separations of gas oil resins by normal and reversed phase liquid chromatography used a silica-based amino-cyano column .…”

Section: Resultsmentioning

confidence: 99%

Hydrocarbon Group Type Separation of Gas Oil Resins by High Performance Liquid Chromatography on Hyper-Cross-Linked Polystyrene Stationary Phase

2015

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An analytical method that provides chromatographic information regarding gas oil resins has been developed. This method uses a high performance liquid chromatographic system without backflushing and a single hyper-cross-linked polystyrene column. The use of the latter was warranted as it retains aromatic model compounds more effectively than a typically used silica-based amino-cyano column. Moreover, there was no need for extra solvent drying techniques because a retention time reproducibility of 2.9% RSD over 6 months was achieved. Using this method, gas oil resins were separated into seven chromatographic regions in 35 min on the hyper-cross-linked polystyrene column using a four-solvent-gradient procedure (hexane, chloroform, tetrahydrofuran, and methanol). On the basis of model compounds, separation was achieved between aromatics, sulfur-containing, and nitrogen-containing compounds. Determining composition has a large effect on the characteristics, conversion, and uses of the petroleum feedstock. As resins comprise a significant component of petroleum feedstockup to 54% of the source materialthe detailed characterization of resins using this method is expected to assist in improving the valorization of petroleum products.

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“…These two techniques allow for the differentiation of hydrocarbon families or carbon types. There are other methods like saturates, aromatics and resins analysis (SAR) that allow the separation of saturates (paraffi ns and cyclo paraffi ns), aromatics and resins, by a column chromatographic separation using different solvents (Harding, Zhao, Qian, Rajagopalan, & Cheng, 1996) and HPLC methods that allow a limited discrimination between different types that are present in these type of petroleum fractions (Qiang & Lu, 1999).…”

Section: Non-hydrocarbon Contaminantsmentioning

confidence: 99%

Prediction of Physicochemical Properties of FCC Feedstock by Chemometric Analysis of Their Ultraviolet Spectrum

Ferrer

2008

CT&F Cienc. Tecnol. Futuro

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Chemometric analysis by Partial Least Squares (PLS) has been applied in this work to correlate the ultraviolet spectrum of combined Fluid Catalytic Cracking (FCC) feedstocks with their physicochemical properties. The prediction errors obtained in the validation process using refinery samples demonstrate the accuracy of the predicted properties. This new analytical methodology allows obtaining in one analysis detailed information about the most important physicochemical properties of FCC feedstocks and could be used as a valuable tool for operational analysis.

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Hydrocarbon group-type analysis of high boiling petroleum distillates by HPLC

Cited by 9 publications

References 32 publications

Determination of Hydrocarbon Group-Type of Diesel Fuels by Gas Chromatography with Vacuum Ultraviolet Detection

Determination of Hydrocarbon Group-Type of Diesel Fuels by Gas Chromatography with Vacuum Ultraviolet Detection

Hydrocarbon Group Type Separation of Gas Oil Resins by High Performance Liquid Chromatography on Hyper-Cross-Linked Polystyrene Stationary Phase

Prediction of Physicochemical Properties of FCC Feedstock by Chemometric Analysis of Their Ultraviolet Spectrum

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