An automatic PNA analyser for the under 200°C fraction contained in a higher boiling product

Boer, H.; Arkel, P. van; Boersma, W.J.A.

doi:10.1007/bf02261622

Cited by 20 publications

(2 citation statements)

References 3 publications

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“…99,100 UCM analysis has been a challenge for decades. Boer and co-workers 101,102 in the 1980s reported a coupled-column petrochemical analyser incorporating 3 different packed columns using multiple heart-cut stages, which enabled automated group type clustering of paraffins, naphthenes and aromatics but was insufficient to resolve compounds within individual chemical groups. Two approaches to the analysis of UCM-containing samples based on capillary MDGC include (i) taking individual narrow H/Cs with high efficiency second column elution in an attempt to provide a measure of resolution, or (ii) subject the whole sample to GC Â GC analysis, which uses a lower resolution 2 D column, but provides a unique structured retention in 2D space which may allow sample components to be teased apart based on the chemical nature of UCM compounds.…”

Section: Characterisation Of Unresolved Complex Mixturementioning

confidence: 99%

Multidimensional gas chromatography beyond simple volatiles separation

Chin

Marriott

2014

Chem. Commun.

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Multidimensional separation in gas chromatography (MDGC) plays an important role in chemical analysis. This review presents selected literature on MDGC development and examples of the range of functionality reported for MDGC methods over the past 2 decades. With the most obvious advantage of providing much greater capacity for resolving constituents of a sample, MDGC extends analytical efficiency to a more substantial molecular coverage, combined with operational flexibility. But by judicious choice of implementation method, important chemical information relating to the sample, its components, potentially physico-chemical properties, and improved capacity for absolute identification may be realised. Sample-to-sample comparison is improved, and sample characterisation is facilitated especially when MDGC is combined with the informing power of modern mass spectrometry. Innovative MDGC arrangements allow high resolution coupled with spectroscopy and alternative bioassays, and delivers molecular elucidation in ways that are beyond just simple analysis of volatiles.

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Section: Characterisation Of Unresolved Complex Mixturementioning

confidence: 99%

Multidimensional gas chromatography beyond simple volatiles separation

Chin

Marriott

2014

Chem. Commun.

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“…Due to the limited peak capacity of one-dimensional chromatography and restricted ability to separate components above C 8 , researchers developed comprehensive two-dimensional gas chromatography (GC × GC) to analyze petroleum fractions. Boer et al 26 used GC × GC to separate alkanes, olefins, cycloalkanes, and aromatics from gasoline. However, GC × GC has a small application range in petroleum analysis.…”

Section: Introductionmentioning

confidence: 99%

Compositional Modeling of VGO Fractions via Analytical Characterization, Structural Assignment, Property Modeling, and Molecular Component Parsing

Jiang,

Cai,

et al. 2023

Energy Fuels

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The detailed molecular characterization of the vacuum gas oil (VGO) fractions is the key to understanding petroleum structure−property relationships and optimizing petroleum refinery operations. In our study, a rapid VGO database-based molecular component parsing method was proposed that could directly calculate detailed molecular composition information using conventional bulk properties as inputs. The molecular database of VGO included four aspects: analytical characterization, molecular structural assignment, single molecular property estimation, and bulk property prediction. According to our established molecular database of typical VGO samples, two main parts in the rapid parsing algorithm of the molecular components were present. The method screened the VGO samples with the most similar bulk properties. The molecular component contents of the most similar sample were subsequently optimized by a simulated annealing algorithm, thereby finally obtaining the practical molecular composition of VGO. Our proposed method overcomes the drawbacks of the virtual molecular information acquired by the traditional compositional reconstruction algorithm. Our results were more accurate, obtained faster, and could facilitate a solid foundation for refineries to achieve the optimization of the entire molecular process simulation.

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Linear temperature programmed retention indices of gasoline range hydrocarbons and chlorinated hydrocarbons on cross‐linked polydimethylsiloxane

White

Hackett

Anderson

et al. 1992

J. High Resol. Chromatogr.

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Key Words:Linear temperature programmed retention indices Gasoline range hydrocarbons Chlorinated hydrocarbons Effect of column pressure on retention index SummaryThis paper describes the experimentally determined linear temperature programmed gas chromatographic retention behavior of hundreds of gasoline range hydrocarbons and chlorinated hydrocarbons on a cross-linked 100 9' 0 polydimethylsiloxane stationary phase.The retention indices of additional compounds which were not available as pure standards were measured in a synthetic gasoline after they had been positively identified by matching mass and infrared spectra.possible using a single capillary column a single high resolution gas chromatographic column often, nevertheless, provides Gwfficient separation of the components present to enable tentative identification and quantitation of many individual compounds When a mass spectrometer or infrared spectrophotometer are used as detectors, identification can become positive and even components which coelute can sometimes be individually quantitied The distribution of alkanes, alkenes, cycloalkanes and aromatic compounds, as a function of carbon number, in gasoline range distillate fuels is another important measurement. I t has been performed by a variety of techniques, including the fluorescent indicator analysis method (FIA) [ l ] , HPLC [2], mass spectrometry [3], and several gas chromatographic methods 14, 5).The experimentally determined retention information has been used to estimate the retention indices of additional compounds by extrapolation or interpolation of plots of carbon number against retention index of homologs.Isothermally determined Kovats retention indices of compounds measured on 100 9'0 polydimethylsiloxane have been taken from the literature and converted to linear temperature programmed retention indices using the method of Guan eta/ [l 11. For many of these compounds, an experimentally determined linear temperature programmed retention index was measured: agreement between experimental and converted values was excellent.In total, retention indices are presented for 480 compounds, including all possible alkylbenzenes containing ten or fewer carbon atoms, and over 150 monoenes and dienes.The effect of column pressure and the average linear velocity of the helium carrier gas on retention index and order of elution is described and discussed.

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An automatic PNA analyser for the under 200°C fraction contained in a higher boiling product

Cited by 20 publications

References 3 publications

Multidimensional gas chromatography beyond simple volatiles separation

Multidimensional gas chromatography beyond simple volatiles separation

Compositional Modeling of VGO Fractions via Analytical Characterization, Structural Assignment, Property Modeling, and Molecular Component Parsing

Linear temperature programmed retention indices of gasoline range hydrocarbons and chlorinated hydrocarbons on cross‐linked polydimethylsiloxane

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