Coal Macromolecular Network Structure Analysis: Solvent Swelling Thermodynamics and Its Implications

Suuberg, Eric M.; Otake, Yoshinobu; Langner, Markus; Leung, Kenneth T.; Milosavljevic, Ivan

doi:10.1021/ef00048a013

Cited by 71 publications

(101 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The figure shows the same general trend observed previously for kukersite oil shale swelling in 22 pure solvents [21], and emphasizes that high EDN solvents are effective in breaking kerogen-kerogen non-covalent bond interactions (such as hydrogen bonds), resulting in maximum swellability. It also shows that there is a limiting molar uptake of high EDN solvents by the kerogen macromolecular structure (see [24]). 5) propylamine (EDN value in this case is taken to be the same as that for ethylamine).…”

Section: Resultsmentioning

confidence: 97%

Solvent Swelling of Kukersite Oil Shale Macromolecular Organic Matter in Binary Mixtures: Impact of Specifically Interacting Solvents

Hruljova¹,

Savest²,

Yanchilin³

et al. 2014

Oil Shale

View full text Add to dashboard Cite

The present work deals with the volumetric solvent swelling of the cross-linked macromolecular organic matter (kerogen) of Estonian kukersite oil shale in binary solvent mixtures. A two-step solvent swelling procedure was used in which swelling was performed first in one solvent followed by the addition of a second solvent. The results confirm the important role of specific interactions in determining the swelling behavior of this kerogen. The kerogen swells more in strong electron donor solvents that are able to break specific kerogen-kerogen interaction such as hydrogen bonds. When comparing the maximum swelling achieved, the binary solvent mixtures did not perform any better than strong electron donor solvents, regardless of how the experiments were conducted.

show abstract

Section: Resultsmentioning

confidence: 97%

Solvent Swelling of Kukersite Oil Shale Macromolecular Organic Matter in Binary Mixtures: Impact of Specifically Interacting Solvents

Hruljova¹,

Savest²,

Yanchilin³

et al. 2014

Oil Shale

View full text Add to dashboard Cite

show abstract

“…Solvent swelling is a widespread technique practiced in many research groups for structural analysis of coals (Green et al, 1984;Nishioka, 2001;Painter and Shenoy, 1995;Suuberg et al, 1994). A recent article reports that asphaltenes immersed in organic media swell (Sirota, 1998).…”

Section: Asphaltene Swelling In Apolar Organic Solventsmentioning

confidence: 99%

Solid Petroleum Asphaltenes Seem Surrounded by Alkyl Layers

Carbognani

Rogel

2003

Petroleum Science and Technology

View full text Add to dashboard Cite

In this review, a comprehensive analysis of recent results obtained in our laboratory and published in the literature is presented, which points toward the existence of alkyl layers surrounding precipitated asphaltene solids. A micellar model for asphaltenes has been proposed, which explains many of the experimental determinations carried out to date with these compounds. The model considers the existence of alkyl moieties surrounding the inner aromatic cores. Faster dissolution kinetics of asphaltenes modified by coprecipitated waxes has been explained by the enhanced incorporation of alkanesurrounded particles into the eluent employed in the dissolution experiments. Finally, asphaltene volumetric changes brought by organic solvents have recently been studied, and can be explained by the existence of an alkyl layer prone to the incorporation of solvent molecules. This paper will discuss these aspects that seem to support the model long time ago postulated by Yen and coworkers.

show abstract

“…This situation is also observed in this study during the swelling experiments with pyridine and ethylenediamine (EDA). In various investigations, EDA is considered to be a specific solvent for coal owing to its ability to disrupt specific interactions in coal such as the H-bonds (Suuberg et al, 1994;Larsen and Lee, 1985;Brenner, 1983). Van Bodegom et al (1984) reported similar results and adduced that the strong bases such as EDA are good solvents for lignites.…”

Section: Effect Of Solvents On Swellingmentioning

confidence: 97%

“…Thus, toluene molecules at the supercritical conditions can penetrate into the pores of the swollen samples more easier than that of original ones (Joseph, 1991b). Another approach is the increase of the numbers of the pores and active sites on the coal surface as a result of the formation of macropores after the treatment with swelling agents (Spears et al, 1993;Suuberg et al, 1994). Thus, toluene molecules diffuse into the pores more easily and dissolve more extractable species than the untreated coals.…”

Section: Supercritical Toluene Extractionmentioning

confidence: 99%

Effect of Various Experimental Parameters on the Swelling and Supercritical Extraction Properties of Lignite

Hacimehmetoğlu

Sınağ

Tekeş

et al. 2007

Energy Sources, Part A: Recovery, Utilization, and Environmenta

View full text Add to dashboard Cite

The original lignite sample, the samples swollen in dimethylsulfoxide (DMSO), dimethylformamide (DMF), pyridine, tetrahydrofuran (THF), acetone, ethylenediamine (EDA), N-methyl-2-pyrrolidone (NMP), tetrabutylammonium hydroxide (TBAH), the samples impregnated by ZnCl 2 as catalyst and the samples both swollen in the solvents and impregnated by ZnCl 2 were subjected to the supercritical toluene extraction and the effects of temperature, pressure, pre-swelling procedure, hydrogen donor solvent (tetralin), and catalyst on the extract yields were investigated.

show abstract

Coal Macromolecular Network Structure Analysis: Solvent Swelling Thermodynamics and Its Implications

Cited by 71 publications

References 0 publications

Solvent Swelling of Kukersite Oil Shale Macromolecular Organic Matter in Binary Mixtures: Impact of Specifically Interacting Solvents

Solvent Swelling of Kukersite Oil Shale Macromolecular Organic Matter in Binary Mixtures: Impact of Specifically Interacting Solvents

Solid Petroleum Asphaltenes Seem Surrounded by Alkyl Layers

Effect of Various Experimental Parameters on the Swelling and Supercritical Extraction Properties of Lignite

Contact Info

Product

Resources

About