Preparative gel permeation chromatographic separation of solvent refined coal

Coleman, William D.; Wooton, David L.; Dorn, Harry C.; Taylor, L.T.

doi:10.1021/ac50012a008

Cited by 32 publications

(10 citation statements)

References 14 publications

(15 reference statements)

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“…However, 1ts ~se is limited due to its inability to dissolve coal as well as THF. Coleman et al (1977) evaluated three packing materials for preparative scale SEC based on the extent and size of separation and cost of material.…”

Section: Application Of Size Exclusion Chromatography To Coal-derivedmentioning

confidence: 99%

Solvent tailoring in coal liquefaction. Quarterly report, April-June 1984

Tarrer¹,

Curtis²,

Guin³

et al. 1984

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Section: Application Of Size Exclusion Chromatography To Coal-derivedmentioning

confidence: 99%

Solvent tailoring in coal liquefaction. Quarterly report, April-June 1984

Tarrer¹,

Curtis²,

Guin³

et al. 1984

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“…Gel permeation chromatography (GPC) is a commonly employed method of obtaining molecular weight distributions(.lf' 5 ). A polymer, usually polystyrene or similar inert material, with a specified degree of crosslinking, is the fractionation ruedium.…”

Section: Gpcmentioning

confidence: 99%

“…5 shows an increase in the recycle rate of the less functional meterial as the run progresses. The recycle rate of highly functional,…”

mentioning

confidence: 96%

Development of a correlation between slurry oil composition and process performance. Topical report 1. Analyses of slurry recycle oils from H-Coal PDU Run 5

Burke¹,

Winschel²,

Pochapsky³

1980

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DISCLAIMER "This book was prepared as an account of work sponsor~d by an 11gency of the United• States Government. Neither the United States Government nor any agency tht:n:of, nor any of their employees, makes any warranty, express or imp !ted, or assumes any legalliabilily ut responsibility for the accuracy, completeness, or usefulness of any information, apparatus, vwo.Iu~..t, u1 1 11vcc33 di3clo3ed, or ropre&entE th~t it. ~~~,. wnulcl not infring;e privatt:lv uwuco.l

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“…The evaluation of this, and other potential PAH removal processes, requires in-depth characterization of the PAH removed and remaining. High-performance liquid chromatography (HPLC) was used to separate and obtain quantitative information on polycyclic aromatic hydrocarbon molecules in high and nonboiling petroleum and coal samples − and for the identification of pyrolysis products . HPLC can also be applied for the quantitation of PAHs, but the lack of standard compounds, particularly alkylated PAH, and the potential complexity of real-life samples from a refinery stream, requires the use of an additional technique for component identification and for verification of chromatographic separation of the analytes.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Polycyclic Aromatic Hydrocarbon Removal from Hydrocracking Recycle Streams

et al. 2019

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Large polycyclic aromatic hydrocarbon (PAH) compounds with 7 or more rings, such as coronene, can be problematic in petroleum refining processes, where they build up over time and eventually enhance coke formation. In this work, large PAH molecules were characterized in a recycling stream returning the distillation bottoms of a commercial hydrocracking reactor back into the unit. High-performance liquid chromatography and Fourier transform-ion cyclotron resonance mass spectrometry (FT-ICR MS) methods were in good agreement with PAH compounds extracted with DMSO, which provided a selective way to determine PAHs with up to 10 aromatic rings. However, after Soxhlet extraction with pentane, PAH compounds with up to 14 aromatic rings were tentatively identified using FT-ICR MS, extending the naphthalene zigzag pattern. With the characterization method established, solvent extraction, solvent precipitation, and adsorption processes were tested to remove the problematic, large PAH compounds from the recycle stream. For each process, including different parameters, the PAH-rich and cleaned streams were analyzed. Adsorption on clay and adsorption on active carbon were the most effective processes in terms of minimizing the rejected fraction and for removing both types of aromatic compounds: unsubstituted (“hard”) and heavily alkylated (“soft”) PAHs. Alternatively, solvent precipitation with different n-alkanes offered a choice to increase the selectivity for PAH through longer alkane solvents, but showed only a modest removal with PAH remaining in the cleaned streams. Soxhlet extraction was found to be superior in comparison to other solvent extraction processes, yielding the PAH with the highest double bond equivalent values, even though it remains unpractical for real-life hydrocracking operation cleanup. Consequently, the detailed characterization by FT-ICR MS suggests that adsorptive removal of PAH is the most effective and practical cleanup process for the studied hydrocracker recycle stream.

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Preparative gel permeation chromatographic separation of solvent refined coal

Cited by 32 publications

References 14 publications

Solvent tailoring in coal liquefaction. Quarterly report, April-June 1984

Solvent tailoring in coal liquefaction. Quarterly report, April-June 1984

Development of a correlation between slurry oil composition and process performance. Topical report 1. Analyses of slurry recycle oils from H-Coal PDU Run 5

Evaluation of Polycyclic Aromatic Hydrocarbon Removal from Hydrocracking Recycle Streams

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